KR102604840B1 - Method and system for providing earthquake disaster prevention contents through classification of earthquake disaster prevention contents - Google Patents

Abstract

The present invention provides an earthquake disaster prevention content classification that collects earthquake disaster prevention data scattered in various places, classifies and analyzes the collected data, provides content that can be used immediately, and shares it through an earthquake disaster prevention content sharing portal. It is about the method and system of providing earthquake disaster prevention content.
A method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content according to an aspect of the present invention includes earthquake disaster prevention content classification through a system including a classification object derivation unit, a content collection unit, a measuring instrument, an analysis unit, and a content provision unit. A providing method comprising: (a) the classification target deriving unit classifies requested content by subject and time zone for earthquake disaster prevention; (b) the classification target deriving unit deriving a collection target of earthquake disaster prevention content for each category according to the classification; (c) the content collection unit collecting content information about the collection target of earthquake disaster prevention content for each category; (d) the analysis unit analyzing field measurement data based on the collected content information; and (e) the content provider providing requested content according to the analysis results through an earthquake disaster prevention content sharing portal.

Description

Method and system for providing earthquake disaster prevention contents through classification of earthquake disaster prevention contents}

The present invention relates to a method and system for providing earthquake disaster prevention content through classification of earthquake disaster prevention content. More specifically, the present invention relates to collecting earthquake disaster prevention data scattered in various places, classifying and analyzing the collected data, and providing content that can be used immediately. It relates to a method and system for providing earthquake disaster prevention content through classification of earthquake disaster prevention content so that it can be shared through an earthquake disaster prevention content sharing portal.

In domestic earthquake-related research, there was not much education or work related to earthquake disaster prevention that citizens or public officials could feel, except in the fields of high-rise buildings, large structures, and nuclear power plants. On the other hand, in neighboring countries Japan and China, large-scale earthquake damage occurred such as the Great Hanshin-Awaji Earthquake in 1995, the Fukuoka Earthquake in 2005, the Sichuan Earthquake in 2008, and the Kumamoto Earthquake in 2016, raising many doubts about Korea's earthquake preparedness. . Taking lessons from the cases of neighboring countries, various problems with earthquake disaster prevention measures at the national level have been identified in Korea, and efforts have been made to improve earthquake-related laws and systems. However, since there have been no actual earthquakes in Korea, there were not many opportunities to develop the technology by applying it to the field.

In particular, earthquake damage occurs on a large scale over a wide area, causes complex landslides and liquefaction, has wide-spread socio-economic impacts such as paralysis of transportation facilities and administrative power, and aftershocks occur for a long period of time, so unlike wind and flood damage, it takes a long time to recover from damage. This tends to be prolonged. In addition, if earthquake damage causes a decrease in local population and a decrease in economic activities such as tourism and commerce, a vicious cycle will eventually occur in which the affected area declines or becomes underdeveloped.

There were few earthquakes that occurred near cities, and most of those that did occur were of magnitude 5.0 or less, so the scale and scope of earthquake damage was mostly limited. The situation with earthquakes in Korea, which occurred near downtown, was the 9.12 earthquake in 2016 and the Pohang earthquake in 2017. Many things have changed. As a result, these earthquakes served as an opportunity to directly test our country's earthquake response capabilities and led to the revision or enactment of existing laws and systems to prevent the spread of earthquake damage. In particular, in the case of the Pohang earthquake, legal and institutional supplementation was promoted to restore Heunghae-eup, Buk-gu, Pohang City, which suffered severe earthquake damage.

Due to the Pohang earthquake on November 15, 2017, the College Scholastic Ability Test was postponed, and a special disaster area was declared five days later on the 20th due to large-scale damage to residential facilities and casualties. The emergency risk assessment of earthquake-damaged facilities, which informs residents of the extent of earthquake damage to their homes, was completed on December 15 of the same year. However, a magnitude 3.5 aftershock occurred on December 25 and a magnitude 4.6 aftershock occurred on February 11, 2018, damaging residential facilities. The damage assessment and detailed safety inspection were extended, the recovery plan was revised for the third time, and due to the prolonged work to stabilize the lives of the victims, repair housing, pay disaster relief funds, and stabilize housing such as rental housing, Pohang City suffered an earthquake on March 2, 2018. A damage control team was officially launched.

As mentioned earlier, as the Heunghae area faced the risk of being underdeveloped in the long term due to earthquake damage, the Ministry of Land, Infrastructure and Transport revised the 'Special Act on Revitalization and Support of Urban Regeneration' on April 17, 2018 to provide housing for residents in disaster areas in the urban regeneration project. The city was rebuilt and workplaces were rebuilt, and projects were implemented to make the city an attractive city, including complex land use, fostering local specialized industries, and tourism and culture. In addition, a new 'special regeneration area' system was established to promote local economy revitalization and urban vitality. Meanwhile, on March 20, 2019, the government research group on the relationship between the Pohang earthquake and geothermal power generation announced that the Pohang earthquake was a triggering earthquake, and the 'Special Act for Fact-Finding and Damage Relief of the Pohang Earthquake' was enacted in 2019 to support the damage caused. It was enacted on December 31, 2018. Afterwards, on October 19, 2021, about four years after the Pohang earthquake, all victims were discharged from the Heunghae-eup Indoor Gymnasium, where 1,180 victims stayed in 221 tents, and the temporary relief center was dismantled.

The 9.12 earthquake and the Pohang earthquake served as an opportunity to break the stereotype that Korea is an earthquake-safe area, and various laws, systems, and technologies related to rapid response immediately after an earthquake and short-term and long-term recovery were tested in the field, and many problems and improvements were made. This has been revealed. Among them, the fact that research results and data that had been conducted individually by ministries, local governments, and experts were dispersed was also highlighted as a problem. In addition, the recognition that it is necessary to prevent budget duplication and bias by identifying and collecting the status of currently scattered earthquake disaster prevention data, constructing high-quality data, and developing customized content for consumers was also shared.

Korean Patent Publication No. 10-2186758 (registration date: 2020.11.30) describes a control and security method for an intelligent earthquake disaster prevention system.

The purpose of the present invention to meet the above-mentioned requirements is to collect the status of damage to people, houses, facilities, etc. and related business data of city hall to understand the work flow following the occurrence of an earthquake, and to collect information on the status of damage to people, houses, facilities, etc., and identify the work flow following the occurrence of an earthquake. The data and information required for earthquake disaster prevention users are classified according to the stage of earthquake disaster occurrence, and geological ground data measured on-site is used to analyze according to information requested by external organizations or the public before and after the earthquake, and provide earthquake disaster prevention data required by earthquake disaster prevention users. The goal is to provide a method and system for providing earthquake disaster prevention content through classification of earthquake disaster prevention content that allows the creation and sharing of disaster prevention content.

A method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content according to an aspect of the present invention to achieve the above-described object is an earthquake disaster prevention of a system including a classification object derivation unit, a content collection unit, a measuring instrument, an analysis unit, and a content provision unit. A method of providing earthquake disaster prevention content through content classification, comprising: (a) the classification target deriving unit classifies required content for earthquake disaster prevention by subject and time period; (b) the classification target deriving unit deriving a collection target of earthquake disaster prevention content for each category according to the classification; (c) the content collection unit collecting content information about the collection target of earthquake disaster prevention content for each category; (d) the analysis unit analyzing field measurement data based on the collected content information; and (e) the content provider providing requested content according to the analysis results through an earthquake disaster prevention content sharing portal.

In the step of classifying the requested content, items can be divided into before, after, and regular earthquakes, and within each item, surveys, interviews, and SNS posts conducted by the public, practitioners, and experts can be classified. there is.

The content requested from the public includes earthquake occurrence information, earthquake behavior tips, earthquake damage status, information on disaster victim support, reliable sources of earthquake disaster prevention information, evacuation routes and traffic conditions, information on shelters, and information on building damage recovery. Information prior to the occurrence of the above earthquake includes 'Earthquake behavior tips for high-rise buildings', 'Evacuation tips for foreigners residing in Korea', 'Outdoor earthquake behavior tips', 'Earthquake behavior while driving', and 'Earthquake behavior tips while using public transportation.' ', and short-term information immediately after the occurrence of the earthquake includes 'Guidelines for conduct after returning home', which contains the rules of conduct for citizens who evacuated to evacuation centers due to the earthquake and safely return to their residential facilities, and Long-term information after the outbreak may include 'residential facility linkage support' for people who are unable to return to their residential facilities because their residential facilities are half or completely destroyed.

The contents requested for the above working-level workers are: 'Preparation and improvement of detailed manuals for earthquake work promotion' for local government workers, 'Active support and improvement of issues that are difficult to resolve on their own, including budget and manpower', for the central government. Cooperation', for victims and disaster victims, 'understanding of the use of relief facilities and concessions and consideration among victims', and for earthquake experts and researchers, 'research and analysis of earthquakes that may occur in the future after an earthquake occurs', and for facility managers, , for local government workers, 'materials and repetitive training related to earthquake work', for the central government, 'support for rapid earthquake response and recovery', and for victims and disaster victims, 'maintenance of order in indoor relief centers and concessions between victims.' and consideration', for earthquake experts and researchers, includes 'research and development related to seismic design and reinforcement', includes 'preparation of emergency fire roads' related to earthquake disaster prevention plans before the occurrence of the above earthquake, and 'preparation of emergency fire roads' immediately after the occurrence of the above earthquake. It includes 'conducting an emergency risk assessment' and 'providing information on availability of medical support in other areas', and may include 'damage to industrial facilities' and 'securing residential facilities' in the long term after the occurrence of the above earthquake.

The content required for the experts includes, before the occurrence of the earthquake, 'information on the earthquake occurrence cycle for each fault', 'maximum possible earthquake magnitude for each fault', and 'information on the fault activity rate' for the fault that causes the earthquake. Basic information on earthquake research, including; Geological ground investigation data including ‘earthquake-induced landslides’, ‘currentization of steep slope hazard maps’, ‘3D underground faults on the Korean Peninsula’, and ‘development of integrated velocity structure model’; Information related to earthquake research and testing facilities, including 'domestic representative earthquake magnitude', 'magnitude correction coefficient calculation', 'development of attenuation equation based on domestic records', and 'development of seismic reinforcement technology for structural materials'; and information on securing earthquake monitoring capabilities, including 'research on early warning technology development', 'establishment of a preemptive response system through earthquake damage scenarios', and 'damage analysis for facility safety assessment', immediately after the occurrence of the above earthquake. may include 'seismic spectrum analysis'.

Meanwhile, an earthquake disaster prevention content providing system through earthquake disaster prevention content classification according to another aspect of the present invention to achieve the above-mentioned object receives data from the user and classifies required content for earthquake disaster prevention by subject and time period, a classification object derivation unit that derives a collection object of earthquake disaster prevention content for each category according to the classification; a content collection unit that collects content information on objects of earthquake disaster prevention content for each category; An instrument that measures ground amplification characteristics and geology at a possible earthquake site or an earthquake occurrence site based on the collected content information; an analysis unit that analyzes the measured field measurement data based on the collected content information; and a content provider that provides requested content according to the analysis results through an earthquake disaster prevention content sharing portal.

The measuring device acquires continuous fine motion measurement data by measuring constant fine motion using a vibration detection sensor, recorder, and speedometer equipment, and the analysis unit compares the obtained constant fine motion measurement data with the ground investigation report to determine constant fine motion caused by an unspecified vibration source. An HVSR (Horizontal to Vertical Spectral Ratio) analysis is performed to obtain ground properties through fine motion, and the measurement waveform of the constant fine motion is 5% cosine tapering, and the frequency range used in the analysis is 0.1 to 50 Hz Butterworth filter is applied. , a smoothing algorithm using a Konno-Ohmachi window can be applied to the resulting graph of the HVSR.

The above-mentioned regular motion measurement data is continuous data that records the movement of ground motion over time using a seismometer. In order to increase the number of data with such continuity, the data is divided and increased at regular time intervals to exclude noise around the seismometer. This is the data, and the analysis unit calculates the constant motion measurement data by dividing it into time windows of 30 seconds, and executes the HVSR analysis by overlapping 6 seconds between each time window, and obtains the execution result of the HVSR analysis. The dominant frequency of the ground for the measurement point is obtained, and the dominant frequency may be a specific frequency when a resonance phenomenon that causes the ground surface to vibrate significantly occurs due to a redundant reflection of vibration within the upper layer of the ground.

The analysis unit compares the penetration depth (soil layer thickness) of the bedrock included in the ground investigation report with the shear wave speed (V _s30 ) at the top 30 m of the soil layer, and sets the shear wave speed (Vs) to 4 for the penetration depth (soil layer thickness) of the bedrock. It can be calculated by dividing by the ship's dominant frequency (4f).

The analysis unit determines whether the HVSR ratio is less than or equal to a certain standard of 3.0 based on the execution result of the HVSR analysis, and the result of converting the shear wave velocity (V _s30 ) at the top of the soil layer at 30 m shows a difference of about 100 m/s, and the Areas where the HVSR ratio is higher than 3.0 are analyzed as soft ground with deep soil layers, and areas where the HVSR ratio is lower than 3.0 can be analyzed as hard ground even if the dominant frequency is low.

According to the present invention, it is possible to conduct surveys, expert interviews, and SNS trend analysis to confirm the content requested by the public, practitioners, and experts.

In addition, the earthquake disaster prevention content classification system can be continuously improved based on the analysis results.

In addition, the number of detailed content items required for the final classification system for each group can be continuously added through the results of previously conducted research.

In addition, in addition to collecting content related to earthquake disaster prevention, it is possible to directly measure and collect domestic geotechnical information important for earthquake disaster prevention research. For this purpose, regional ground property information (column diagram, N value, seismic wave velocity, etc.) can be collected, and ground property analysis can also be performed through continuous field measurement using a speedometer.

In addition, in order to collect customized earthquake disaster prevention content, 22 countries and research institutes that are judged to have relevant data were selected, and among the various topics held by the relevant organizations, only earthquake disaster prevention related content was collected. Key words such as earthquake disaster prevention are used, and the final collected content, excluding content that does not meet the needs of consumers and duplicate data, is provided by classifying the data initially collected through these key words into document content, image content, video content, etc. can do.

In addition, in order to check whether the collected earthquake disaster prevention content faithfully reflects the needs of consumers, we compare the detailed items of content requested by each group with the collected earthquake disaster prevention content, and divide the collected content of each group into public content, practitioner content, and expert content. It can be classified and provided.

Figure 1 is a configuration diagram schematically showing the internal configuration of a system for providing earthquake disaster prevention content through earthquake disaster prevention content classification according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a method of providing earthquake disaster prevention content through earthquake disaster prevention content classification according to an embodiment of the present invention.
Figure 3 is a diagram showing an example of necessary information for each time zone stored in a database according to an embodiment of the present invention.
Figures 4a to 4c are diagrams showing a classification system for earthquake disaster prevention content for the public according to an embodiment of the present invention.
Figures 5A to 5C are diagrams showing an earthquake disaster prevention content classification system for practitioners according to an embodiment of the present invention.
Figures 6a to 6c are diagrams showing an earthquake disaster prevention content classification system for practitioners according to an embodiment of the present invention.
Figure 7 is a diagram showing a point subject to continuous fine movement measurement according to an embodiment of the present invention.
Figure 8 is a diagram showing the measuring equipment and the overall view of the measurement for continuous fine motion measurement according to an embodiment of the present invention.
Figure 9 is a diagram showing time window division of continuous measurement data in constant motion measurement according to an embodiment of the present invention.
Figure 10 is a diagram showing the results of deriving the dominant frequency of the ground using constant motion measurement data according to an embodiment of the present invention.
Figure 11 is a diagram showing examples of the earthquake disaster prevention portal main screen and screens for each subject category according to an embodiment of the present invention.
Figures 12A to 12C are diagrams showing the collection status of content requested by the public according to an embodiment of the present invention.
Figures 13A to 13C are diagrams showing the collection status of content requested by practitioners according to an embodiment of the present invention.
Figures 14A to 14C are diagrams showing the collection status of content requested by experts according to an embodiment of the present invention.
Figure 15 is a diagram showing a classification of content requested by the public, practitioners, and experts according to an embodiment of the present invention.
Figure 16 is a diagram showing the collection rate of content requested by the public, practitioners, and experts according to an embodiment of the present invention.
Figure 17 is a diagram showing the requested content collection rate by consumer and earthquake occurrence period according to an embodiment of the present invention.
Figure 18 is a configuration diagram schematically showing the configuration of a content providing unit according to an embodiment of the present invention.
Figure 19 is a diagram showing examples of classification blocks by subject and blocks by time zone generated by the classification block generator according to an embodiment of the present invention.
Figure 20 is a diagram showing an example in which a first classification block is connected and matched with a content block through a matching chain according to an embodiment of the present invention.
Figure 21 is a diagram showing an example in which two classification blocks according to an embodiment of the present invention are connected to each other through a connection chain.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts that are not relevant to the description are omitted, and identical or similar components are assigned the same reference numerals throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only cases where it is "directly connected," but also cases where it is "electrically connected" with another element in between. . Additionally, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

When a part is referred to as being “on” another part, it may be directly on top of the other part or it may be accompanied by another part in between. In contrast, when a part is said to be "directly above" another part, it does not entail any other parts in between.

Terms such as first, second, and third are used to describe, but are not limited to, various parts, components, regions, layers, and/or sections. These terms are used only to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, the first part, component, region, layer or section described below may be referred to as the second part, component, region, layer or section without departing from the scope of the present invention.

The terminology used herein is only intended to refer to specific embodiments and is not intended to limit the invention. As used herein, singular forms include plural forms unless phrases clearly indicate the contrary. As used in the specification, the meaning of "comprising" refers to specifying a particular characteristic, area, integer, step, operation, element and/or ingredient, and the presence or presence of another characteristic, area, integer, step, operation, element and/or ingredient. This does not exclude addition.

Terms indicating relative space, such as “below” and “above,” can be used to more easily describe the relationship of one part shown in the drawing to another part. These terms are intended to include other meanings or operations of the device in use along with the meaning intended in the drawings. For example, if the device in the drawing is turned over, some parts described as being “below” other parts will be described as being “above” other parts. Accordingly, the exemplary term “down” includes both upward and downward directions. The device can be rotated 90° or at other angles, and terms indicating relative space are interpreted accordingly.

Although not defined differently, all terms including technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries are further interpreted as having meanings consistent with related technical literature and currently disclosed content, and are not interpreted in ideal or very formal meanings unless defined.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

Figure 1 is a configuration diagram schematically showing the internal configuration of a system for providing earthquake disaster prevention content through earthquake disaster prevention content classification according to an embodiment of the present invention.

Referring to FIG. 1, the earthquake disaster prevention content providing system 100 through earthquake disaster prevention content classification according to an embodiment of the present invention includes a classification object derivation unit 110, a content collection unit 120, a measuring instrument 130, and an analysis unit. It may include a unit 140, a content providing unit 150, and a database 160.

The classification object derivation unit 110 may receive data from the user, classify content required for earthquake disaster prevention by subject and time period, and derive collection targets of earthquake disaster prevention content by category according to this classification. Here, for example, the classification by subject is classified by the public, practitioners, and experts, and the classification by time period is classified into before occurrence, after occurrence, and regular.

The content collection unit 120 may collect content information about the collection target of earthquake disaster prevention content by category.

The instrument 130 can measure ground amplification characteristics and geology at a possible earthquake site or an earthquake occurrence site based on the collected content information.

The analysis unit 140 may analyze the measured field measurement data based on the collected content information.

The content provider 150 may provide requested content according to the analysis results through an earthquake disaster prevention content sharing portal.

The database 160 stores information by subject classified by the public, practitioners, and experts, and information by time period classified as before, after, and regularly, or stores content information about the collection target and content information collected according to the collection target. You can save it.

Additionally, the database 160 may store constant motion measurement data measured by the instrument 130 at an earthquake occurrence site, or store ground investigation reports collected from other devices or systems.

The measuring device 130 can be implemented as a separate device from the earthquake disaster prevention content provision system 100, has a form that can be moved at the site of an earthquake, and provides an earthquake disaster prevention content provision system ( 100).

The measuring instrument 130 can obtain constant fine motion measurement data by measuring fine motion at all times using a vibration detection sensor, recorder, and speedometer equipment.

The analysis unit 140 may compare the acquired continuous motion measurement data with the ground investigation report and perform HVSR (Horizontal to Vertical Spectral Ratio) analysis to obtain ground characteristics due to constant fine motion caused by an unspecified vibration source.

5% cosine tapering is used for the always-fine measurement waveform, a 0.1 to 50 Hz Butterworth filter is applied to the frequency range used for analysis, and a smoothing algorithm using a Konno-Ohmachi window can be applied to the resulting graph of HVSR.

Regular motion measurement data is continuous data that records the movement of ground motion over time using a seismometer. In order to increase the number of data with this continuity, the data is divided into regular time intervals and increased to exclude noise around the seismometer. It could be data.

The analysis unit 140 calculates the constant-motion measurement data by dividing it into time windows of 30 seconds, executes HVSR analysis with 6 seconds overlapping between each time window, and calculates the data at the measurement point as a result of the HVSR analysis. The dominant frequency of the ground can be obtained.

Here, the dominant frequency may be a specific frequency when an overlapping reflection phenomenon for vibration occurs within the upper layer of the ground and a resonance phenomenon that causes the ground surface to vibrate significantly occurs.

The analysis unit 140 compares the penetration depth of the bedrock (soil layer thickness) included in the ground investigation report with the shear wave speed (V _s30 ) at the top 30 m of the soil layer, and calculates the shear wave speed (Vs) for the penetration depth (soil layer thickness) of the bedrock. It can be calculated by dividing by 4 times the dominant frequency (4f).

The analysis unit 140 determines whether the HVSR ratio is less than or equal to a certain standard of 3.0 based on the results of the HVSR analysis, and the result of converting the shear wave velocity (V _s30 ) at the top of the soil layer 30 m may differ by about 100 m/s. there is.

The analysis unit 140 analyzes areas where the HVSR ratio has a value of 3.0 or more as soft ground with a deep soil layer, and analyzes areas where the HVSR ratio has a value of 3.0 or less as hard ground even if the dominant frequency is low.

FIG. 2 is a flowchart illustrating a method of providing earthquake disaster prevention content through earthquake disaster prevention content classification according to an embodiment of the present invention.

Referring to FIG. 2, in the earthquake disaster prevention content providing system 100 through earthquake disaster prevention content classification according to an embodiment of the present invention, the classification object derivation unit 110 classifies required content for earthquake disaster prevention by subject and time period. You can do it (S210).

Next, the classification object derivation unit 110 may derive the collection object of earthquake disaster prevention content for each category according to the above-mentioned classification (S220).

Next, the content collection unit 120 may collect content information about the collection target of earthquake disaster prevention content by category (S230).

Here, the earthquake disaster prevention content providing system 100 can measure ground amplification characteristics and geology through the instrument 130 at a site where an earthquake is likely to occur or where an earthquake has occurred.

Next, the analysis unit 130 can analyze field measurement data based on the collected content information (S240).

Here, the earthquake disaster prevention content providing system 100 can receive constant fine motion measurement data measured from the measuring instrument 130, and the analysis unit 130 compares the received constant motion measurement data with the ground investigation report to determine the level of unspecified vibration. It is possible to perform HVSR analysis to determine ground properties through constant fine movement by the circle.

Next, the content provider 150 may provide requested content according to the analysis results through the earthquake disaster prevention content sharing portal (S250).

In the step of classifying the required content (S210), the items are classified into before, after, and regular earthquakes, and within each item, surveys, interviews, and SNS posts conducted by the public, practitioners, and experts are classified. can do.

Contents requested from the public include earthquake occurrence information, earthquake behavior tips, earthquake damage status, information on disaster victim support, reliable sources of earthquake disaster prevention information, evacuation routes and traffic conditions, information on shelters, and information on building damage recovery. can do.

Information before an earthquake occurs includes ‘Earthquake behavior tips for high-rise buildings’, ‘Evacuation tips for foreigners living in Korea’, ‘Outdoor earthquake behavior tips’, ‘Earthquake behavior tips while driving’, and ‘Earthquake behavior tips while using public transportation’. You can.

Short-term information immediately after the occurrence of an earthquake may include 'Guidelines for behavior after returning home', which contains rules of conduct for citizens who evacuated to evacuation centers due to the earthquake after safely returning to their residences.

Long-term information after an earthquake may include 'residential facility linkage support' for people who are unable to return to their residential facilities because their residential facilities were half or completely destroyed.

The requested contents for practitioners are: ‘Creating and improving detailed manuals for earthquake work promotion’ for local government practitioners, and ‘Active support and cooperation for issues that are difficult to resolve on their own, including budget and manpower’ for the central government. ', for victims and disaster victims, 'understanding of the use of relief facilities and concessions and consideration among victims', and for earthquake experts and researchers, 'research and analysis of earthquakes that may occur in the future after an earthquake occurs.'

In the case of facility managers, 'earthquake work-related materials and repetitive training' for local government workers, 'support for rapid earthquake response and recovery' for the central government, and 'maintaining order in indoor relief centers' for victims and disaster victims. This may include 'concessions and consideration between the victims and the victims' and 'research and development related to earthquake-resistant design and reinforcement' for earthquake experts and researchers.

It includes 'preparation of emergency fire roads' related to earthquake disaster prevention plans before an earthquake occurs, 'conducting an emergency risk assessment' and 'providing information on possible medical support in other areas' immediately after an earthquake occurs, and long-term after an earthquake occurs. This may include ‘damage to industrial facilities’ and ‘securing residential facilities’.

Contents required for experts may include basic information on earthquake research, geological ground investigation data, information related to earthquake research and experiment facilities, and information on securing earthquake monitoring capabilities.

Basic information on earthquake research may include 'information on the earthquake occurrence cycle for each fault', 'maximum possible earthquake magnitude for each fault', and 'information on the fault activity rate' about the fault that causes the earthquake before the earthquake occurs. .

Geological ground investigation data may include ‘earthquake-induced landslides’, ‘current risk map for steep slopes’, ‘3D underground faults on the Korean Peninsula’, and ‘development of integrated velocity structure model’.

Information related to earthquake research and testing facilities may include 'domestic representative earthquake magnitude', 'magnitude correction coefficient calculation', 'development of attenuation formula based on domestic records', and 'development of seismic reinforcement technology for structural materials'.

Information on securing earthquake monitoring capabilities may include 'research on early warning technology development', 'establishment of a preemptive response system through earthquake damage scenarios', and 'damage analysis for facility safety assessment'.

Content required for experts may include ‘seismic wave spectrum analysis’ immediately after an earthquake occurs.

Below, earthquake disaster prevention content and earthquake disaster prevention data are explained.

1. Consumer customized earthquake disaster prevention content classification system

First, the earthquake disaster prevention data stored in the database 160 includes data from the public, practitioners, experts, SNS analysis, etc.

go. public

Table 1 below shows an example of public-related earthquake disaster prevention information stored in the database 160.

Table 1 shows a case study of necessary information and content conducted in Japan by dividing the time period before and after the earthquake. Although the earthquake occurrence information is the same, the need for and importance of the information varies over time, so the usability of the information can vary greatly depending on the consumer and time. Table 1 shows the necessary information and content before and after the earthquake, obtained through the Kumamoto Earthquake Online Survey (2016) and the Kumamoto Earthquake NHK Online Demand Survey (2017). In the NHK survey, subscription to earthquake insurance was selected as the first measure for households to prepare for earthquakes, and after an earthquake, information on lifeline restoration such as electricity and water, as well as safety and daily necessities at evacuation sites were identified.

In the 'Survey study to establish an Ulsan-type earthquake disaster prevention plan' conducted by the Ulsan Institute of Science and Technology, 500 Ulsan citizens and 441 people nationwide (excluding Ulsan, Gyeongnam, and Gyeongbuk) were asked about 7 items to prepare for earthquakes. The priorities were investigated and the results are shown in Table 2 below.

In both Ulsan and the nation, 'Do not place TVs or vases in high places' was selected as the most important item, and the item with the fewest answers was 'Have emergency supplies in case of an earthquake.' In addition, in terms of earthquake preparedness, the areas that the national and local governments should support for earthquake disaster prevention were 'seismic reinforcement', 'earthquake insurance', and 'seismic diagnosis', and the items that should be supported in terms of earthquake damage recovery were ' This appeared in the order of ‘recovery of damage to facilities’, ‘temporary housing facilities for victims’, and ‘support of relief goods’.

In the 'Study on Activating Specialized Earthquake Disaster Prevention Institutions' conducted as a commissioned research by the Earthquake Disaster Prevention Center, a survey was conducted on 507 adult men and women aged 19 and older living in Pohang City about what information was most needed in the event of an earthquake. As shown in Table 3, the first priority was earthquake occurrence information and earthquake behavior tips at 80.8%, and the second priority was earthquake damage status and shelter-related information.

In addition, the results of the survey on the information needed immediately after the earthquake and during evacuation are shown in Figure 3, and the common information needed immediately after the earthquake and during evacuation was information on earthquake behavior tips and places to avoid the cold, which appears to be an influence of the weather. Figure 3 is a diagram showing an example of necessary information for each time zone stored in a database according to an embodiment of the present invention.

The following Table 4 is an example of necessary information by time period stored in the database 160, and is a survey conducted by the researcher itself, which included residents living in temporary evacuation facilities in the Heunghae Indoor Gymnasium in Pohang, students at Handong University, and students in Buk-gu and Ulju-gun, Ulsan. These are the results of a targeted survey.

Compared to the previous results, adults who are responsible for housing responded that they most needed earthquake behavior tips, information about shelters, and victim support information, while high school students who are minors responded that they needed information about earthquake occurrence and shelters, and earthquake damage status in that order. You can see that the information needed is different for each age group.

A survey was conducted on earthquake disaster prevention content targeting a total of 91 disabled people and helpers such as social workers and guardians at two welfare centers for the disabled in Pohang City. It is necessary to prepare content for people with disabilities, such as earthquake disaster warning and emergency contact technology, evacuation site location maps, and periodic earthquake evacuation training, and provide support for helpers who can help in emergency situations, as well as answers about experiences at the time of an earthquake. It was found that a system was needed.

me. hands-on worker

A total of 212 people, including local government workers (Pohang City Hall officials) and facility managers (Pohang Cultural Foundation, Pohang City Facility Management Corporation), were asked to provide content requests to workers, the central government, affected residents, and experts, as shown in Table 5 below. same.

Among the requests, for the same local government workers, 'preparation and improvement of detailed manuals for earthquake work promotion', for the central government, 'active support and cooperation on issues that are difficult to resolve on their own, such as budget, manpower, etc.', victims and It includes 'understanding of the use of relief facilities and concessions and consideration among victims' for disaster victims, and 'research and analysis of earthquakes that may occur in the future after an earthquake occurs' for earthquake experts and researchers.

In addition, in the case of facility managers, 'materials and repetitive training related to earthquake work' for local government workers, 'support for rapid earthquake response and recovery' for the central government, and 'order within indoor relief centers' for victims and disaster victims. It includes ‘concessions and consideration between the victims and the victims’ and ‘research and development related to earthquake-resistant design and reinforcement’ for earthquake experts and researchers.

all. expert

As a result of a survey of a total of 72 people, including earthquake-related experts and researchers, it was found that research related to securing and strengthening seismic performance was the most necessary research field in earthquake disaster prevention research, and earthquake disaster management and ground were ranked second. It appeared to be a study related to earthquake engineering. In order to secure and strengthen seismic performance, the field related to seismic design standards was found to be the most necessary in the first place, followed by seismic performance evaluation in the second place, and the field related to seismic reinforcement technology in the third place.

In order of the most necessary research fields in earthquake disaster management, earthquake education and training was found to be the most necessary, followed by earthquake damage estimation technology in second place, and areas related to earthquake behavior tips and earthquake response manuals in third place. . In addition, in the ranking of the most necessary research areas in geotechnical earthquake engineering, research related to design ground motion was found to be ranked 1st, followed by ground classification system as 2nd, and research related to ground amplification effect as 3rd.

la. SNS analysis

In 2020, earthquake-related media materials were analyzed from January 1, 2017, when the Pohang Earthquake occurred, to December 30, 2019. We extracted 4,010 press releases containing negative keywords such as 'surprised', 'embarrassed', 'incompetent', and 'complacency', and calculated the negative index based on the main text of each press release. The fraud index is a value calculated as the ratio (%) of negative word keywords to the total number of words in the press release. Analysis was conducted focusing on 239 press releases with a fraud index of '10' or higher. As a result, it was possible to classify them into six keywords, including 'earthquake trauma', 'disaster broadcasting', 'disaster text', 'evacuation information', 'damage compensation', 'earthquake safety', and 'manual', and based on these, The content is derived as follows.

○ Psychological treatment and stability content to overcome earthquake trauma

○ Content providing earthquake information through rapid disaster text messages and broadcasting

○ Location and route information content such as outdoor evacuation sites and indoor relief centers

○ Promotional content on earthquake damage compensation system and application method

○ Diagnosis checklist for self-contained housing facilities

○ Unified earthquake preparedness manual based on realistic evidence

○ Objectivity and consistent earthquake damage management manual

<Earthquake disaster prevention content classification system>

The demand for earthquake disaster prevention content cannot be limited to a specific group such as the public, practitioners, or experts, and the content required by each consumer also varies depending on the purpose of use. Therefore, in order to reasonably and efficiently reflect the needs of all consumers, not only is it necessary to collect a vast amount of earthquake disaster prevention content, but also a systematic classification of the collected data is required. In the 1st to 3rd years of research, in order to systematically and efficiently classify content, starting with business data on damage from the Gyeongju and Pohang earthquakes, the status of domestic and overseas earthquake disaster prevention content, surveys by consumer, and SNS analysis were conducted. Accordingly, a classification system for each consumer was created every year. did.

In the 4th year of research, the content classification system for the 4th year is summarized in Table 6 by analyzing the surveys conducted so far, SNS analysis, and earthquake disaster prevention roadmap expert opinions.

Figures 4a to 4c are diagrams showing a classification system for earthquake disaster prevention content for the public according to an embodiment of the present invention.

Referring to Figures 4A to 4C, among the newly discovered contents aimed at the general public, before an earthquake occurs, there are 'Earthquake Behavior Tips for High-rise Buildings', 'Evacuation Tips for Foreigners Living in Korea', 'Outdoor Earthquake Behavior Tips', and 'Earthquake While Driving'. Earthquake behavior tips were added in additional situations and locations other than those discovered in previous studies such as 'Behavior Tips' and 'Earthquake Behavior Tips While Using Public Transportation', and 'Earthquake Evacuation Simulation Training' was newly discovered for earthquake preparedness education. .

After the earthquake occurred (short-term), 'Guidelines for behavior after returning home' was added, which contains rules of conduct for citizens who evacuated to evacuation centers due to the earthquake to safely return to their residential facilities, and after the earthquake occurred (long-term), residential facilities were added. 'Residential facility linkage support' has been added for people who are unable to return to their residential facilities due to half or complete destruction.

In addition, 'support for repairing damaged household goods' such as home appliances and furniture related to living environment recovery information was newly discovered, and the newly added earthquake disaster prevention content classification system can be shown as shown in Figures 4A to 4C.

Figures 5A to 5C are diagrams showing an earthquake disaster prevention content classification system for practitioners according to an embodiment of the present invention.

Referring to Figures 5a to 5c, newly discovered content for practitioners showed that 'preparation of emergency fire roads' related to earthquake disaster prevention planning before an earthquake occurs is necessary, and 'conducting emergency risk assessment' and 'conducting emergency risk assessment' immediately after an earthquake occurs. It was found that a linkage system such as 'providing information on availability of medical support in other areas' along with information related to damage to the same structure was necessary. In addition, it was found that analysis of 'damage to industrial facilities' and the resulting impact on the national economy is required in the long term after the earthquake, and a national plan to 'secure residential facilities' for victims whose residential facilities were damaged was found to be required. Direction of support was also found to be required. The newly added earthquake disaster prevention content classification system diagram can be shown as Figures 5A to 5C.

Figures 6a to 6c are diagrams showing an earthquake disaster prevention content classification system for practitioners according to an embodiment of the present invention.

Referring to Figures 6A to 6C, newly discovered content targeting experts explains the necessity of collecting earthquake disaster prevention data for the following reasons. It was found that the basic information for earthquake research is 'information on earthquake occurrence cycle by fault', 'maximum possible earthquake magnitude by fault', and 'information on fault activity rate' about faults that cause earthquakes. Geological ground investigation data showed that 'earthquake-induced landslides', 'updating risk maps for steep slopes', 'three-dimensional underground faults on the Korean Peninsula', and 'development of an integrated velocity structure model' are necessary. The above data is believed to be a cross-section of the lack of domestic data on ground characteristics that are closely related to the occurrence and amplification of earthquakes. In relation to earthquake research and testing facilities, it was found that 'domestic representative earthquake magnitude', 'calculation of magnitude correction coefficient', 'development of attenuation formula based on domestic records', and 'development of seismic reinforcement technology for structural materials' were necessary. These requirements are believed to be due to the fact that the earthquake magnitude, correction coefficient, and attenuation equation currently used in Korea were created based on data from countries such as the United States and Japan, where earthquakes frequently occur, and do not clearly reflect the domestic situation. In addition, in order to secure earthquake monitoring capabilities, it was found that data such as 'research on early warning technology development', 'establishment of a preemptive response system through earthquake damage scenarios', and 'damage analysis for facility safety assessment' are also needed. It was found that ‘seismic spectrum analysis’ was necessary immediately after an earthquake occurred. Seismic spectrum analysis, which can determine the amount of energy in each cycle based on time series data of seismic waves, is known to increase damage to high-rise buildings when low-frequency energy is large, and damage to low-rise buildings when high-frequency energy is large. Through this analysis of the seismic wave spectrum, it is believed that the damage trend of the structure can be inferred, and through the accumulation of the relevant data, improvement of the design response spectrum suitable for domestic circumstances can be promoted. In addition, it was found that research on 'tsunamis' was also necessary. Despite cases in which tsunamis occurring in neighboring countries affected Korea, such as the 1964 Naigata tsunami and the 1993 tsunami in the southwestern ocean of Hokkaido, or cases in which Korea suffered direct damage, such as the tsunami that occurred in the central East Sea in 1983, domestic It is believed that the demand is due to the lack of tsunami-related research. The newly added earthquake disaster prevention content classification system for experts can be shown as shown in FIGS. 6A to 6C.

Overall, the characteristics of the newly discovered content are that while the general public has a similarly high demand for earthquake behavior tips before an earthquake and content related to handling and recovery after an earthquake, the expert group has a similarly high demand for content on basic information on earthquake research before an earthquake occurs. is in high demand. In the case of the public, anxiety that a new earthquake may occur is increasing due to the uncertainty in predicting the occurrence of a main earthquake due to the nature of earthquake disasters, and at the same time, interest in long-term control and recovery is increasing as approximately 4 years have passed since the Pohang earthquake. It is judged. For experts, it is believed that the need for basic data to conduct research on earthquake disaster prevention that reflects the domestic situation was highlighted after experiencing the 9.12 earthquake and the Pohang earthquake. In addition, practitioners appear to demand earthquake preparedness content that can efficiently and systematically respond to large-scale national issues such as earthquakes.

2. Collection of earthquake disaster prevention data and content

2-1. Analysis of collected ground information status and field measurement data

go. Collection of ground characteristics information by region

As a result of the demand survey, it was analyzed that there was a high level of interest in the importance of geological ground survey data among the contents requested by earthquake disaster prevention experts. Accordingly, in order to investigate and share ground characteristics through regional ground vibration measurements, geological ground data was collected focusing on the southeastern region, including Ulsan and Pohang. From 2018, when the embodiment of the present invention began, to the present, data were collected based on regional ground investigation reports and stored in the database 160 for easy direct use. Some of the ground characteristics data, such as shear wave velocity data for each point in the database, are preferentially loaded into the earthquake damage estimation system developed by the present applicant and are used to improve the reliability of regional earthquake damage estimation results.

First, the ground investigation data collected from 2018 to 2021 corresponds to a total of 1,528 locations, as shown in Table 7 below.

In 2018, the first year, there were 194 locations in the Cheongju substation and Hwaseong City Hall, in 2019, there were 724 locations in the Nam-gu industrial complex and Yangjeong-dong community center in Ulsan, and in 2020, there were 497 locations in Ulsan Down District 2 and the Hyomun Industrial Complex in Ulsan. This year, data was collected from 127 locations including Pohang, Ulsan, and Busan.

The data collection method was discussed with the ordering organizations that initially conducted ground surveys, such as offices of education carrying out seismic reinforcement construction for elementary, middle, and high schools, national agencies related to seismic design of roads and facilities, the Korea Meteorological Administration for the installation of seismic observatories, and local governments. and collected. The remaining data was obtained by searching and collecting ground investigation reports shared on the Internet. In particular, because the data was collected and organized mainly on ground properties such as shear wave speed, drilling column, and N value, which are directly necessary for earthquake disaster prevention research, it can be used more effectively in earthquake disaster prevention research than other ground survey data.

me. Ground vibration field measurement data analysis

1) Permanent, fine-moving field measurement using a speedometer

When an earthquake occurs, a lot of damage occurs in urban areas where population and buildings are concentrated, but ground data is relatively lacking and existing ground investigation methods have many limitations. General ground investigation methods include drilling survey methods and surface wave physical exploration methods, but in terms of cost, drilling generally requires a cost equivalent to 800 to 100 million won per location. In addition, drilling work and analysis of drilling results take a relatively long time, and the use of large drilling machines is subject to noise and space constraints. However, the HVSR method is easy to install, quickly measures and analyzes data, and indirectly derives ground properties through a low-cost investigation method. Overseas, this survey method has been actively used in earthquake disaster prevention research, such as ground amplification characteristics and fault surveys, since the past.

Therefore, in an embodiment of the present invention, constant fine motion was measured using speedometer equipment in areas where urban ground survey data were lacking, and HVSR (Horizontal to Vertical Spectral Ratio) analysis was performed. In addition, field measurement data were compared with existing ground survey reports. Analysis was conducted.

2) Analysis of ground properties using constant motion measurement data

The area subject to ground survey was conducted based on the point where the existing ground survey was conducted for comparative analysis of HVSR results. To facilitate comparative analysis, the measurement points were measured separately between areas with relatively shallow and hard bedrock and areas with deep and soft bedrock. The region was limited to the Ulsan area, including Buk-gu, Jung-gu, and Nam-gu, Ulsan, where the applicant is located. Field measurements were conducted separately into primary and secondary stages. As shown in Figure 7, there are a total of three areas in Buk-gu, Ulsan, including Sangan Elementary School, Yangjeong Elementary School, and Yeompo Elementary School, and there are four locations in Jung-gu, which are Hamwol Elementary School, Samil Elementary School, Ujeong Elementary School, and Okseong Elementary School. Figure 7 is a diagram showing a point subject to continuous fine movement measurement according to an embodiment of the present invention. In Figure 7, there are a total of 5 locations in the Nam-gu area, and measurements were conducted targeting Yaeumcho, Seonamcho, Dongbaekcho, Dongpyeongcho, and Baeullicho.

The equipment and measurements used for HVSR analysis based on constant-motion measurement using a speedometer are shown in Figure 8. Figure 8 is a diagram showing the measuring equipment and the overall view of the measurement for continuous fine motion measurement according to an embodiment of the present invention. The equipment used was the CERTIMUS equipment, the latest speedometer from GURALP, UK. The measuring equipment is a model that integrates a vibration detection sensor and a recorder. The performance of the measuring equipment is a three-component (Z, N, E) speedometer, with a frequency response range of 0.0083~100Hz and a dynamic range of 149dB. HVSR analysis was performed using the GEOPSY program developed through the SESAME European Seismological Association project. The GEOPSY program can be downloaded from www.geopsy.org, and the overall HVSR analysis method was referred to the HVSR GUIDELINES (2004) report published by SESAME on the corresponding web page.

5% cosine tapering was used for the constant-fine measurement waveform. The frequency range used for analysis was a 0.1~50Hz Butterworth filter, and a smoothing algorithm was applied to the HVSR result graph using the Konno-Ohmachi window to smooth the arithmetic mean. STA was set to 1.00s, LTA was set to 30.00s, Min STA/LTA was set to 0.2, and Max STA/LTA was set to 2.5 to derive and analyze a meaningful time window.

HVSR analysis is a method of determining ground properties through constant slight movement caused by an unspecified vibration source, and it is important to obtain reliable values through statistical analysis with a large amount of data. In general, constant motion data is continuous data that records the movement of ground motion over time using a seismometer. In order to increase the number of data with this continuity, by dividing the data into regular time intervals and increasing it, noise around the seismometer is excluded. There is also the advantage of being able to do it (Park Nam-ryul, 2010). Figure 9 is a diagram showing time window division of continuous measurement data in constant motion measurement according to an embodiment of the present invention. That is, Figure 9 is measurement data of constant ground motion recorded for 1,200 seconds by performing HVSR analysis. In the embodiment of the present invention, the constant motion measurement data was calculated by dividing it into a time window of 30 seconds. Each time window overlapped by 6 seconds, which was set to ensure data continuity and more data.

Figure 10 is a diagram showing the results of deriving the dominant frequency of the ground using constant motion measurement data according to an embodiment of the present invention.

Referring to Figure 10, as a result of HVSR analysis using constant motion measurement data, the dominant frequency of the ground for the measurement point was obtained.

A total of 12 points were measured in each region within Ulsan. Through HVSR analysis at 12 measurement points, the dominant frequencies of two areas in Jung-gu were analyzed as 12.29 Hz in Hamwol Elementary and 4.08 Hz in Okseong Elementary. The dominant frequencies of the three measurement points in the Buk-gu region were derived as 6.06Hz for Sangan Elementary, 2.19Hz for Yangjeong Elementary, and 1.48Hz for Yeompo Elementary. The five locations in Nam-gu area showed 3.42Hz in Yaeumcho, 8.13Hz in Seonamcho, 2.34Hz in Dongbaekcho, 30.66Hz in Dongpyeongcho, and 1.23Hz in Baehwacho. Lastly, no separate dominant frequencies were derived from the two measurement points in the Jung-gu area, Samil Elementary School and Ujeong Elementary School.

3) Verification of ground characteristics survey results using constant motion measurement data

Verification of the ground investigation method based on constant motion measurement data using a velocity meter is to compare the depth of penetration of bedrock (soil layer thickness) and the shear wave velocity (Vs30) at the top of the soil layer at 30 m as shown in the investigation results performed in the existing ground investigation report.

The equation for estimating the bedrock penetration depth is as follows:

When vibrations overlap and reflect within the upper layer of the ground, a resonance phenomenon occurs that causes the ground surface to vibrate significantly at a specific frequency, which is called the 'dominant frequency' of the ground. According to Okamoto (1984), the greatest vibration occurs when the dominant frequency is four times the thickness of the upper layer of the ground. According to this principle, the approximate thickness of the soil layer can be estimated using Equation 1.

Here, Ds is the soil layer thickness, Vs is the shear wave velocity, and f is the dominant frequency.

The average shear wave velocity (V _s30 ) at the top 30 m above the ground was estimated using the correlation between the dominant frequency (f _peak ) and V _S30 proposed by Kwak et al. (2018) as shown in Equation 2 below.

Table 8 shows the verification results of the ground investigation method based on constant-motion measurement data using a speedometer.

The verification results for bedrock penetration depth (upper soil layer thickness) yielded generally similar results, except for Sangancho and Yaeumcho. In the case of Sangancho, the verification results may be analyzed differently due to the distance from the existing drilling survey site and complex geological structure during continuous measurement due to strong winds and surrounding environment. When referring to existing ground investigation reports and geological maps, Yaeumcho is composed of solid ground and the bedrock penetration depth is shallow. Although the dominant frequency was derived from Yaeumcho, in light of the fact that the HVSR ratio was low (less than 3.0) in the analysis results according to the embodiment of the present invention, the HVSR graph characteristics that appear when the bedrock is shallowly buried and the ground is hard Since it is clearly visible, it can be interpreted that the area is predominantly composed of hard ground. Samilcho can be seen as a hard ground with shallow bedrock when referring to existing ground reports and geological maps. These results are consistent with the characteristics of low HVSR ratio (less than 2.0) and no separate specific dominant frequency, and overall, it is close to the existing ground characteristics. It can be seen that the results have been obtained. Since the principle of the HVSR survey method is to estimate the discontinuity surface, it can be seen that in places where bedrock is shallow and solid ground exists, amplification does not occur and a specific dominant frequency does not appear.

The result of converting V _s30 based on the HVSR result was analyzed to be generally consistent because the difference was about 100 m/s. However, it differs significantly only in Yaeumcho. The reason for this is that in the case of Yaeumcho, the shear wave speed values are different due to the reliability problem of deriving the dominant frequency mentioned above.

In general, continuous fine motion is measured by measuring on the outskirts of downtown areas or at night when there is little artificial human activity, but in the embodiment of the present invention, it is to determine whether the ground investigation method using constant fine motion measurement data is effectively performed even in urban areas and daily life. For this reason, most of the measurements were made during the day when many people are active, rather than measuring regular movements at times when artificial noise was excluded. In addition, it is known that the constant motion measurement data when analyzing HVSR is affected by wind, and some measurement points measure constant motion at times when there is a lot of wind, which can be seen as a difference from the existing ground investigation report.

Although a separate statistical research study must be conducted through various environments and multiple experiments, based solely on the results of this study, in the Ulsan area, places with a H/V amplification ratio of 3.0 or more are analyzed as soft ground with relatively deep soil layers. Areas with values below 3.0 were analyzed as solid ground even though the dominant frequency was low. Accordingly, although there may be differences depending on the region, below a certain H/V amplification ratio, the bedrock is distributed shallowly and can be derived as solid ground.

In order to improve the reliability of HVSR analysis results in the future, it is necessary to secure the reliability of HVSR analysis results through appropriate signal processing variable settings and signal processing techniques for each ground characteristic through continuous micromotion analysis research. For earthquake disaster prevention research, additional case studies and research may be needed to convert to other material properties such as shear wave velocity. Overseas, many researchers are making efforts in various fields to derive meaningful research results through various attempts and utilize them for earthquake disaster prevention research. On the other hand, since research is not continuously conducted in Korea and is conducted intermittently, there must be various research attempts and continuous budget investment related to HVSR. Through this, an effective ground survey estimation method targeting urban areas can be usefully utilized.

In addition, the correlation between the dominant frequency of the ground and V _s30 can be derived from an appropriate correlation equation through various measurement experiments and statistical analysis. Reliability can be increased through research and research on how to derive V _s30 using the dominant frequency information of the ground derived through HVSR analysis, or through the FK or SPAC method, which investigates ground characteristics by arranging multiple speedometers. These examples have the effect of contributing to improving domestic earthquake disaster prevention research capabilities by providing basic data for earthquake damage estimation, fault investigation, ground liquefaction, seismic design, and national earthquake risk map production.

2-2. Status of earthquake disaster prevention content collected by organization

In order to collect data according to the content classification system for each consumer previously implemented, a total of 22 countries and research institutes were selected, and data were searched using eight keywords, including earthquake, tsunami, and earthquake disaster prevention. The final collected content, excluding duplicate data and content that does not meet the needs of consumers, is a total of 2,242 items, including 2,157 document content, 2 image content, and 71 video content. The collection status is shown in Table 9.

The reason why the number of collections accounts for a very small amount (about 10%) compared to the number of surveys is because the degree of duplication of earthquake response-related content held by each institution is very high, and most of them only deal with local phenomena caused by earthquakes, and earthquakes are not the main research theme. It seems.

3. Earthquake disaster prevention content sharing portal

3-1. Earthquake disaster prevention data sharing system

In an embodiment of the present invention, the content provider 150 may provide requested content according to the analysis results as described above through the earthquake disaster prevention content sharing portal.

Content classification system ver. described above. 4.0 shows that various types of data are needed depending on the consumer and the time of the earthquake, and the status of data collected from 22 countries and research institutes shows the possibility of finding more useful data as more key terms are used. there is.

In order to collect the collected data in one place and create a repository that can be immediately used in earthquake research or disaster sites, an embodiment of the present invention provides a sharing system through an earthquake disaster prevention content sharing portal. First, in connection with the Korea Meteorological Administration for earthquake occurrence information, we provide a UI to easily find instrumental earthquakes, historical earthquakes, and overseas earthquakes, and set permissions for data to be made public or private depending on the user, sign up for membership, and display the collected reports on a PDF screen. Provides a UI for confirmation. Through this, we investigated the usability and convenience of the pilot portal targeting 30 consumers (10 members of the public, 10 practitioners, and 10 experts).

About 2,000 previously collected earthquake disaster prevention research reports, contents, etc. were classified into main menus and detailed menus as shown in Table 10, and the research institute was able to modify, add, and delete the portal menus on its own, and member management and Administrator functions have been strengthened to enhance operational convenience.

In addition, to increase users' understanding of earthquake disaster prevention and usability of the sharing system, information such as earthquake knowledge and FAQs is displayed and provided.

The main menu was divided into four categories: earthquake knowledge, public earthquake information, earthquake policy materials, and earthquake academic materials. Most of the data can be viewed and downloaded without special membership registration, but some of the earthquake policy data can be used only after registering as a member due to personal information or designation as non-public data of the organization.

Here, the reason why the content classification system and the sharing portal menu are different is because the classification system was created for the purpose of analyzing and collecting required content when collecting data, and the sharing portal menu was created according to the contents of the collected content. Additionally, the menu of the sharing portal can be added or modified after collecting data according to the content collection rate.

The following is a description of the data collected by main menu and detailed menu, and an example of the portal main screen and screen by topic category is shown in Figure 11 below. Figure 11 is a diagram showing examples of the earthquake disaster prevention portal main screen and screens for each subject category according to an embodiment of the present invention.

Looking at the status of collected data according to the classification system of the earthquake disaster prevention content sharing portal, the causes of earthquakes, which are subcategories of understanding and terminology of earthquakes, include content on plate tectonics and elastic rebound theory, which are theories of earthquake occurrence, and the possibility of domestic earthquakes occurring. . The size and location of earthquakes contains pictures and explanations to help you understand the concepts of the magnitude, intensity, epicenter, and epicenter of the earthquake, and the historical earthquakes section contains content about earthquake records mentioned in various domestic history books.

Active faults and liquefaction phenomena contain information on the definition of active faults, historical division of active faults, classification of active fault groups, definitions of liquefaction, and liquefaction cases, and in earthquake resistance/seismic isolation/vibration isolation, the differences between each concept are explained in detail and illustrated. It's showing.

In the earthquake case, information is provided not only on the earthquakes that occurred domestically, such as the 9.12 earthquake and the Pohang earthquake, but also on the earthquakes that occurred overseas, such as the Great Valdivia Earthquake, the Great South Asia Earthquake, and the Great East Japan Earthquake.

Among the sub-categories of information on residential facilities, which are in the middle category, it explains why Hanok and brick houses are vulnerable to earthquakes in houses at risk of earthquakes, and includes changes in domestic earthquake-resistant design standards.

"Making our houses strong against earthquakes" explains reinforcement methods to improve the seismic performance of hanoks, brick houses, and apartments, and "Earthquakes! If you know in advance, you can prepare" explains various problems that may arise depending on the time elapsed after an earthquake. It points out and suggests ways to prevent this.

Storm and flood damage insurance includes content on the basic concepts of storm and flood damage insurance, facilities eligible for subscription, and subscription inquiries, providing methods to help you cope with unexpected disasters that may occur.

The earthquake disaster support system, which is a middle category, contains content on how to write a natural disaster support map and how to apply online. In the details of the support system, it includes the subjects of casualties and damage to houses and household goods, support details, application methods, It provides detailed information on the disaster support system, including content on payment procedures and contact information.

Instrumental earthquake information, a subcategory of earthquake occurrence information, provides content on the date and time, magnitude, depth, epicenter, and maximum seismic intensity of earthquakes that have occurred in Korea since the 1970s.

Historical earthquake information provides content on the location of earthquake occurrence and maximum seismic intensity based on earthquake damage recorded in domestic historical documents. The results of historical earthquake data may vary depending on the researcher regarding the epicenter and seismic intensity of the earthquake, but since earthquakes were recorded less than 100 years ago, historical earthquake data is known to be very important when determining the earthquake cycle. .

Overseas earthquake information provides content on the date and time, magnitude, depth, and epicenter of earthquakes that occur around the world, and can be used as content to prevent domestic damage that may be caused by strong earthquakes in neighboring countries. It can be.

In the middle category, earthquake preparedness information, we collected various earthquake knowledge-related contents that can be used to recognize earthquake damage phenomena in advance, minimize damage, and prepare. Representative contents include 'Let's Know Earthquakes' published by the Korea Land Corporation in 2000, 'Earthquake Safety in Daily Life' published by the Ministry of the Interior and Safety in 2017, and 'Earthquakes, let's prepare and know in advance' published by the Ministry of the Interior and Safety in 2018. In addition, a total of 93 documents and video contents were collected.

In the middle category, earthquake action tips, we collected content containing various ways to protect people's lives and property from earthquakes. Representative contents include the ‘Disaster Evacuation Behavior Guidelines’ published by the Ministry of the Interior and Safety in 2017, the ‘Earthquake Citizen Behavior Guidelines (Earthquakes, prepare and know in advance’) published by the Korea Meteorological Administration in 2019, and the ‘Earthquake Behavior Guidelines’ published by the National Disaster and Safety Research Institute in 2019. There are 'Earthquake Behavior Tips 1, 2, 3 Residential Facilities' and 'Earthquake Behavior Tips 1, 2, 3 Medical Facilities', and a total of 100 other documents and video contents.

The disaster safety portal provides links to disaster safety-related portals provided by Seoul, Incheon, Gyeonggi, Gangwon, Daejeon, Daegu, Gwangju, Busan, Jeju, Ulsan, and Gyeongju, providing the latest information on earthquakes occurring in major regions of Korea. It is convenient and can be checked quickly.

In the earthquake manual, which is a middle category of earthquake policy data, we collected content that included actions to be taken by disaster management personnel at institutions and local governments immediately after an earthquake occurs and initial disaster emergency response activities when a disaster occurs. Representative contents include the 'Earthquake Disaster Response Headquarters Earthquake Disaster Prevention Action Manual' published by the Seoul Metropolitan Government in 2003, and the 'Comprehensive Guide to Government Support for Early Stabilization of the Livelihood of Local Disaster Victims' published by the Central Disaster and Safety Countermeasures Headquarters in 2017. We collected 81 related materials on similar topics.

In the middle category, earthquake policy data, data related to establishing the functions of government organizations to effectively handle and respond to disaster management situations at the national level were collected. ‘Study on the establishment of a disaster-resistant city plan to create a city safe from disasters’ published by the Korea Research Institute for Human Settlements in 2008, ‘Study on the establishment and operation of a comprehensive safety situation information system at the national level’ published by the Korea Institute of Public Administration in 2010, and Korea in 2013. The 'Study on Establishing a Korean-style Collaborative Governance System' published by the Korea Institute of Public Administration is a representative content, and 461 pieces of content with similar topics were collected.

Earthquake field surveys include damage field reports on earthquakes that occurred in Korea, such as 'Hongseong Earthquake Current Status Research Report', 'Pohang Earthquake Analysis Report', and '9/12 Earthquake White Paper', as well as '1999 Turkey Izmit Earthquake', '2003 A total of 41 field reports on earthquakes that occurred overseas, including the 2008 Algeria Boumerdes Earthquake, and field records of earthquake disaster management by organization were collected.

In earthquake observation information, which is a middle category of earthquake academic data, there are ways to efficiently utilize data obtained from domestic acceleration observatories, such as 'Research on earthquake integrated observation network operation and rapid warning system development (Busan-Gyeongnam region)' published by the Prime Minister's Office in 2004. In addition to policy studies on Also included.

In this way, 160 pieces of earthquake observation information were collected, including content related to simple earthquake observation, as well as ways to improve the accuracy of earthquake observation and ways to efficiently utilize observed earthquake data.

In the ground risk information, we sought to collect a wide range of data on the characteristics of the country's ground and faults, including liquefaction of the ground during an earthquake, landslide risk, and investigation and utilization of domestic active faults. Representative contents include ‘Research on understanding ground characteristics in preparation for earthquake disasters’ published by the National Disaster Prevention Research Institute in 2000, ‘Development of ground damage prediction technology such as slope collapse during earthquakes’ published by the Ministry of Public Safety and Security in 2015 and 2016, There are 'Development of advanced technology for displaying design ground motion through seismic acceleration analysis, etc.', 'Planning research for continuous operation and improvement of effectiveness of active fault map system' published by the National Disaster and Safety Research Institute in 2020, and 188 other ground motions. and fault-related data were collected.

In terms of structural design standards, various earthquake-resistant design-related data currently used in Korea were collected. Representative data include the 'Seismic Design Performance Standards for Major Facilities (Draft)' issued by the Ministry of Construction and Transportation in 1998, and the Korea Infrastructure Safety Corporation in 2020. There are ‘Guidelines for evaluating the seismic performance of existing facilities’.

The structural design standards, which are a middle category, collect data on 72 design standards, seismic performance evaluation methods, and design guidelines similar to the previously mentioned data. In the middle category of volcanoes, a total of 13 volcano-related contents were collected, and representative contents include 'Research on Baekdu Volcanic Magma Characteristics and Geodynamics' conducted by the Ministry of Science, ICT and Future Planning from 2014 to 2016, and 'Jeju Hallasan Volcanic Body' conducted by the Korea Meteorological Administration in 2015. ‘Magma investigation and geothermal energy analysis research’.

In addition, content on overseas volcanoes such as 'Seismic activity and velocity structure research around Melbourne Lake, Antarctica' conducted by the Korea Meteorological Administration in 2015, and 'Development of domestic damage prediction technology due to volcanic earthquakes' conducted by the Ministry of Public Safety and Security in 2015 Likewise, content on predictions of additional damage that could be caused by volcanic activity was also collected.

In the middle category, tsunami, there are easy content that can help the public understand tsunami, such as 'I Want to Know (Tsunami)' published by the National Institute of Meteorological Research in 2010, and 'Tsunami Safety' published by the Ministry of Public Safety and Security in 2015. Professional content such as ‘Educational Materials’, ‘Monitoring Progress of Tsunami/Earthquake Damage Recovery in Southeast Asia’ published by KOTRA in 2005, and ‘Tsunami Occurrence <Tsunami Observation Data Analysis>’ published by the National Oceanographic Research Institute in 2015. 48 pieces of content were collected.

In the middle category, overseas data, we collected 79 pieces of content, such as various earthquake response manuals issued in countries with frequent earthquakes such as the United States and Japan, and analysis of trends in foreign geology/seismic technical standards. In the last middle category, other technical information, we collected It contains 886 collected contents that are not included in the mentioned classification system.

Representative contents of other technical information include ‘Study on standards for improvement of facilities for old schools’ published by Korea Educational Development Institute in 2017, ‘Legal study on safety management regulatory system of underground lifelines’ published by Korea Legislative Research Institute in 2018, 2021 These include ‘Study on structural ductility reinforcement measures for piloti-type multi-family housing to ensure earthquake-resistant safety’ published by Korea Land and Housing Corporation.

3-2. Earthquake disaster prevention content collection status

go. public

As shown in Table 11, the content requested by the public before an earthquake can be divided into five categories, including earthquake behavior tips, residential space preparation tips, and support systems for the vulnerable in disasters. There were a total of 26 detailed items for each category, of which 24. It was found that relevant data was collected.

Earthquake behavior guidelines include the Ministry of the Interior and Safety's 'National Earthquake Behavior Guidelines' and the 'Earthquake Behavior Guidelines 1, 2, and 3' developed in this study, and those issued by the United States Geological Survey (USGS) include water, electricity, gas, etc. in the event of an earthquake. There is content such as 'Protecting your family from earthquakes', a manual that can be used safely.

In the residential space preparedness tips, information on earthquake insurance and how to sign up are included in the subcategory of earthquake knowledge in the earthquake disaster prevention content sharing portal. In the case of non-structural measures, the Korean version of the earthquake preparedness behavior guidelines issued by the New Zealand government is included. 'Easy home safety measures in case of an earthquake' were collected.

In the disaster-vulnerable support system, in the case of organizations requesting help and rescue, the '119 Earthquake Guide (Action Manual)' published by the Busan Fire Academy in 2017 includes disaster and safety-related apps, situation room emergency contact networks of related organizations, status of designation of liaison officers for related organizations and organizations, and It contains the current status of local disaster management agencies.

In earthquake preparedness education, the required information for earthquake evacuation simulation training is provided in the video 'We are conducting an earthquake evacuation drill' produced by the Ministry of Education in 2016. Earthquake occurrence information in the shared portal provides information on instrumental earthquakes, historical earthquakes, and overseas earthquakes.

However, in a situation where most modern structures are becoming larger and taller, data on earthquake behavior tips for high-rise buildings and cases related to earthquake disaster prevention sports events have not been collected, so it appears that it is necessary to collect additional data on the relevant details.

As shown in Table 12, the content requested by the public immediately after an earthquake can be divided into four categories, including earthquake occurrence notification, family safety confirmation, and evacuation notification information. There were a total of 7 detailed items for each category, of which 6 Relevant data were collected.

In the case of earthquake occurrence information, it can be found in the seismic earthquake information in the earthquake occurrence information in the earthquake disaster prevention content sharing portal, and in the case of tsunami risk information and tsunami evacuation information, 'Let's prepare for a tsunami like this' published by the Korea Meteorological Administration in 2004 and the Ministry of the Interior and Safety. Detailed information on the requested contents is provided in 'Our Neighborhood Tsunami Evacuation Site' published by . However, the content to check the family's safety may be research service material that cannot be used by the public as it is a 2012 Ministry of the Interior and Safety research service on the possibility of using commercial networks related to the establishment of a disaster communication network necessary for responding to disaster scenes.

As shown in Table 13, the content requested by the public after an earthquake (short-term) can be divided into four categories, including earthquake occurrence information, life and damage recovery information, and earthquake evacuation information. There are a total of 13 detailed items for each category. and of these, 10 related data were collected.

Earthquake occurrence information was explained earlier, and detailed information on living and damage recovery information, such as return to home, work, school, etc., was included in the earthquake disaster prevention content in consideration of the uncertainty of additional aftershocks that may occur as mentioned above. You will have to follow the government and local government's response in real time through the disaster and safety information portal.

Safety evacuation routes in earthquake evacuation information can be provided through videos in 'Where to Evacuate in a Disaster' produced by the Ministry of Public Administration and Security in 2018, and public transportation usage information is published by the Korea Transport Institute in 2011. In 'Implications of Japan's Earthquake Damage in the Transportation Sector and Domestic Response Plans', measures to utilize emergency roads and change existing bus routes are presented.

In terms of the victim support system, the 'Comprehensive guide to government support for early stabilization of the lives of natural disaster victims' published by the Central Disaster and Safety Countermeasure Headquarters in 2017 provides information on various tax benefits and relief goods support for victims. However, data on how to use indoor relief centers, temporary housing facilities, and victim support systems for foreigners and travelers may not be collected.

As shown in Table 14, the public's post-earthquake (long-term) required content can be divided into three categories: damage treatment information, living environment restoration information, and long-term care service. There were a total of 8 detailed items for each category. Among these, two related data were collected.

In damage treatment information, psychological treatment to overcome trauma and home repair support through living environment recovery information are explained in detail in the 'Comprehensive Guide to Government Support for Early Stabilization of Life for Residents Victims of Natural Disasters' published by the Central Disaster and Safety Countermeasures Headquarters in 2017. . However, requested content such as a list of precise safety diagnosis companies and seismic repair and reinforcement companies, child and child care support measures, and residential facility linkage support may not be collected.

me. hands-on worker

As shown in Table 15, the content required by practitioners before an earthquake occurs can be divided into 10 categories, including regional risk, emergency risk assessment, and location of hazardous facilities. There were a total of 26 detailed items for each category, of which 17 were required. Relevant data was collected.

The emergency risk assessment is a detailed item, and the contents on the assessment method, evaluation unit training, list of earthquake experts, and earthquake site investigation methods and equipment are discussed in ‘Measures to improve the risk assessment system for earthquake-damaged buildings and development of educational materials’ published by the National Disaster and Safety Research Institute in 2019. ' describes the risk assessment method for earthquake-damaged buildings, and provides damage photos by type and information on the operation of the risk assessment team related to the risk assessment of domestic earthquake-damaged buildings during the 9.12 earthquake and the Pohang earthquake.

The management of earthquake shelters in the advance preparedness system collected the contents of 'Integrated management of shelters by disaster type and development of technology to support evacuation life by disaster type' published by the National Disaster and Safety Research Institute in 2014. In this content, the status of designation and management of shelters, redundancy investigation, and operation status were collected. It provides information on management plans, etc.

Content related to the seismic reinforcement rate and seismic performance certification system of earthquake-resistant reinforcement was collected from 'Establishment of National Seismic Design and Seismic Reinforcement Master Plan' published by the Ministry of the Interior and Safety in 2018.

However, considering that some required contents cannot be collected, such as detailed industrial complex information or basic lifeline information, it can be said that the currently collected data was collected by faithfully reflecting the requirements of disaster management practitioners.

As shown in Table 16, the contents requested by practitioners immediately after an earthquake can be divided into 11 categories, including media response, earthquake occurrence notification, and cooperation with other regions and other departments. There were a total of 18 detailed items for each category, of which 17. Relevant data was collected.

Media response and civil complaint response guidelines are described in the 'Disaster Management and Public Relations Educational Material' published by the Ministry of Public Safety and Security in 2015, which describes the characteristics of each media, how to use them, and public communication strategies. For emergency health evaluation of local government buildings, college entrance exams, national events, etc., the case of the 2017 Pohang earthquake is mentioned in the 2018 '2017 Pohang Earthquake White Paper', so you can refer to that case.

In the case of the list of relief supplies and guidelines for managing volunteer support supplies, the research and analysis of local governments' disaster situation evacuation and relief goods possession and use status and evacuation are based on 'Integrated management of shelters by disaster type and development of evacuation life support technology' published by the National Disaster and Safety Research Institute in 2014. It describes the development of standards for the type and amount of storage items in evacuation shelters in preparation for situations, and the development of technology for calculating the appropriate amount of local government disaster relief set reserves. However, since no content has been collected on the automation of earthquake damage collection and aggregation, it will be necessary to search for relevant data or conduct related research in future research.

As shown in Table 17, the content requested by practitioners after the earthquake (short-term) can be divided into 11 categories, including areas with ground damage such as liquefaction and the status of facility damage such as buildings and roads. There were a total of 22 detailed items for each category. , of which 21 related data were collected.

In the case of fire occurrence information, radioactivity leakage information, and hazardous chemical leakage information, the Ministry of Science and ICT's 'Fire performance evaluation of social infrastructure facilities considering initial earthquake damage' in 2019, and the Daejeon Metropolitan Office of Education's 'In the event of an earthquake and radiation leakage' in 2011. You can use the 2019 data from the Ministry of Environment's 'Development of an early warning dissemination system for hazardous chemical handling facilities caused by earthquakes', but for the detailed items, additional data must be collected through an emergency field survey in the area where the earthquake occurred. It may be appropriate to do so.

Designation and operation regulations related to victims and evacuees and content related to earthquake outdoor evacuation sites are in the 2017 National Disaster and Safety Research Institute's 'National Disaster and Safety Research Institute', which includes contents such as the Pohang Earthquake Shelter Operation Case, Implications of Shelter Operation in Japan and Korea and Overseas, and Earthquake Shelter Designation and Operation Standards. ‘Development of earthquake shelter designation and operation standards’ was collected.

The support system of earthquake disaster prevention experts collected the 'Plan for building a disaster prevention resource mobilization system by disaster type', which presents guidelines for disaster prevention resource management and operation to establish a quick support system with local governments and related organizations in the event of a disaster.

Content related to tsunami emergency evacuation sites and temporary residential facilities for earthquakes was collected from the 'Earthquake and Tsunami Disaster Crisis Response Practical Manual' published by the Cultural Heritage Administration in 2019. Contents related to care such as medical care and education for victims, emergency recovery and reinforcement of damage, and requests for volunteer support are described in the '2017 Emergency Recovery Action Guidelines' issued by the Ministry of Public Safety and Security in 2017.

In the case of management of private support supplies, 'Integrated management of shelters by disaster type and development of evacuation life support technology' published by the National Disaster and Safety Research Institute in 2014 contains content on the selection and management of shelters and victims' support supplies, and the damage report application form is The content is included in the Earthquake Disaster Support System, a subcategory of earthquake knowledge within the earthquake disaster prevention content sharing portal.

However, for detailed items such as ground damage areas such as liquefaction, fire occurrence information, and radioactivity leak information, it would be more effective to respond to current issues by using the data collected through emergency field surveys rather than applying the content collected through this study.

As shown in Table 18, the content requested by practitioners after the earthquake (short-term) can be divided into four categories, including urban regeneration projects such as liquefaction, ground damage areas such as socio-economic damage, and status of facility damage such as buildings and roads. Contents required for each category There were a total of 10 detailed items, of which 5 related data were collected.

In relation to the reconstruction plan, which is a detailed item of the urban regeneration project, the '2016 Kumamoto Earthquake Damage Recovery Field Survey' published by the National Disaster and Safety Research Institute in 2019 described the basic policies of Kumamoto City's reconstruction plan and the contents of the revival-focused projects.

Among the support for disaster victims, support for disaster relief funds, taxes, etc., and medical support are contents related to disaster relief funds and various tax benefits in the 'Comprehensive guide to government support for early stabilization of the lives of natural disaster victims' published by the Central Disaster and Safety Countermeasures Headquarters in 2017. It describes.

Based on the above results, sufficient data was collected for the content required by disaster management practitioners for before the earthquake, immediately after the earthquake, and after the earthquake (short term). However, it was confirmed that the content required for the period after the earthquake occurred (long-term) was insufficient, as was the case with the general public. In particular, it has been confirmed that the majority of data that has not been collected among the content requested by disaster management practitioners needs to reflect the characteristics of disaster-prone areas, so research that considers these items is continuously needed.

all. expert

As shown in Table 19, the contents required by experts before an earthquake can be divided into seven categories, including basic earthquake research information, earthquake occurrence information, and securing earthquake monitoring capabilities. A total of 23 contents were required by category, of which 17 were related materials. collected.

In the case of national geological maps in basic earthquake research information, the Ministry of Land, Infrastructure and Transport's National Geotechnical Information Integrated DB Center provides nationwide geotechnical information based on drilling data, but national geological map contents are not provided separately.

As for the liquefaction evaluation method, 'Development of a liquefaction evaluation technique (draft) reflecting ground characteristics' published by the National Disaster and Safety Research Institute in 2019 provides content on the development of a liquefaction evaluation technique considering the domestic local environment.

In the case of fault survey data and geological ground survey data, fault survey data in the Gyeongju area are collected from ‘Gyeongju Earthquake Causes, Faults and Intensity’ published by the Korean Society of Civil Engineers in 2018 and ‘Geological and Ground Survey Data Construction’ published by Busan Metropolitan City in 2019. It provides geological and geotechnical information to be used in producing seismic hazard maps for Busan Metropolitan City and Busan Metropolitan City, but it was not possible to collect content that provides nationwide data.

The seismic source, which is a detailed item of the national seismic hazard map, was collected from the content of 'Research on techniques for identifying seismic source characteristics of domestic earthquakes' published by the Korea Atomic Energy Research Institute in 2008. This content examines the various methods used to determine the epicenter and describes a waveform inversion method that can determine the moment tensor and depth of currently available earthquakes.

Information on Probabilistic Seismic Hazard Analysis (PSHA) and Deterministic Seismic Hazard Analysis (DSHA) for national seismic hazard mapping can be found in ‘Earthquakes Caused by Uncertain Information’ published by the Ministry of Science and Technology in 1991. You may refer to ‘Research on Forecasting’. This study describes how to supplement the probabilistic earthquake prediction method by handling subjective uncertainty in the probabilistic earthquake prediction method using fuzzy set theory.

The earthquake vulnerability function of the earthquake damage scenario can be used as a reference for the 'Research on localization of the earthquake damage vulnerability function' published by the National Disaster Prevention Education Research Institute in 2007 and 2008. The data describes in detail the contents related to the comparison of fragility curve derivation techniques and the step-by-step domestic application of the seismic fragility function for each facility through local production of the seismic fragility function. In the case of seismic design standards, various domestic structural design standards and seismic design standards are collected and provided in the structure design standards of earthquake academic materials in the earthquake disaster prevention sharing portal.

However, for some requested contents, such as national geological maps, facility information, and seismic acceleration measurement data waveforms, the scope of data collection was so wide that collection itself was impossible. Therefore, if this content is excluded, it can be confirmed that the currently collected data faithfully reflects the needs of experts.

As shown in Table 20, the content requested by experts immediately after an earthquake can be divided into four categories, including earthquake event waveform data, geology and ground information of the earthquake occurrence area, and infrastructure information. There were a total of 10 detailed items for each category. , of which 6 related data were collected.

Geological and geotechnical information on earthquake-prone areas was collected from the Korea Institute of Geoscience and Mineral Resources' 2005 content titled 'Development of geotechnical information system construction techniques for establishing regional comprehensive earthquake resistance measures'. This content describes geotechnical information system construction techniques within the 3D GIS configuration area to establish comprehensive and systematic regional earthquake measures on the Korean Peninsula.

Damage analysis for facility safety assessment is based on the 'Nonlinear Earthquakes' published by the National Disaster and Safety Research Institute in 2013, which contains information on the prevention of secondary casualties and economic damage caused by aftershocks immediately after an earthquake and the development of risk assessment technology. ‘Development of aftershock risk assessment technology for earthquake-damaged buildings through response analysis’ was collected.

However, it was not possible to collect earthquake event waveform data and data on buildings and infrastructure information in the earthquake area. However, seismic acceleration waveform data can be collected using the Korea Meteorological Administration, and overseas seismic acceleration waveform data can be collected by using the USGS. Collection will be possible.

As shown in Table 21, the content requested by experts after the earthquake (short-term) can be divided into six categories, including how to participate in earthquake damage site surveys and earthquake disaster prevention information sharing and communication systems. There are a total of 7 detailed items for each category. There were 5 of them, and relevant data was collected for 5 of them.

The earthquake disaster prevention information sharing and communication system can share various earthquake disaster prevention information through the disaster safety portal, which is a subcategory of public earthquake information within the earthquake disaster prevention content sharing portal.

The geological and ground information of the earthquake-damaged area and the information on damaged buildings can be found in the '9.12 Earthquake' Field Investigation Results Report' published by the Central Earthquake Disaster Cause Investigation Team in 2021, the 'Pohang Earthquake Analysis Report' by the Korea Meteorological Administration in 2021, and the Ministry of the Interior and Safety in 2021. '2017 Pohang Earthquake White Paper' provides information on the ground and damaged buildings in the area where the 9.12 earthquake and Pohang earthquake occurred.

Research data on emergency reinforcement and repair technologies for old buildings and measures to ensure facility safety against aftershocks are found in ‘Seismic Vulnerability of Reinforced Concrete Bridges Considering Repair Effects’ published by the Ministry of Science and ICT in 2018. We collected research data on continuous earthquake vulnerability assessment techniques that can effectively predict the seismic performance of bridges that reflect the physical effects of repairs or reinforcement performed before continuous earthquakes on reinforced concrete bridges subjected to continuous earthquakes.

As shown in Table 22, experts' post-earthquake (long-term) required content can be divided into three categories: earthquake white paper, earthquake damage site CCTV footage, and earthquake victim interviews and surveys. There are a total of 4 detailed items for each category. There were 4 of them, and related data was collected for 4 of them.

The earthquake white paper is 9.12. In the case of the earthquake white paper and the 2017 Pohang earthquake white paper, '9.12.' published by the Ministry of Public Safety and Security in 2017. Earthquake White Paper -9.12. We collected records of the earthquake and the 180 days after it and the '2017 Pohang Earthquake White Paper' published by the Ministry of Public Administration and Security in 2018, CCTV footage of earthquake damage sites was collected from news and YouTube videos, and interviews and surveys of earthquake victims were collected. For the content, data on public awareness of earthquakes were collected through a survey conducted by the contribution project.

Most of the content requested by experts about before, immediately after, after (short-term) and after (long-term) an earthquake, except for some data that cannot be collected, such as national geological maps, information on facilities, and information on buildings and infrastructure in earthquake-prone areas. It was confirmed that the data was collected and faithfully reflected the needs of experts. However, since the basic information on domestic earthquake research is necessary for earthquake disaster management, continuous research investment, research data collection, and data sharing will be necessary.

la. Content collection status

Based on the classification system for content requested by consumer described above, the collected data and uncollected data for each requested content are classified as follows.

Content classification system ver. In 4.0, the collection status of the content requested so far in the entire process of the public before and after the earthquake, after the earthquake (short-term), and (long-term) is shown in Figures 12a to 12c. Figures 12A to 12C are diagrams showing the collection status of content requested by the public according to an embodiment of the present invention. Among the earthquake disaster prevention data collected so far, those with more than one piece of data or information in the detailed classification of the classification system are marked in blue, and most of them have been collected except for after the earthquake occurred (long-term).

The collection status of content requested by practitioners is shown in Figures 13A to 13C. Figures 13A to 13C are diagrams showing the collection status of content requested by practitioners according to an embodiment of the present invention. Practitioners who are expected to have a lot of required content can see that more content was collected immediately after and after the earthquake (short-term) than before and after the earthquake (long-term).

When showing the collection status of contents requested by experts, it was found that there were not many detailed classifications compared to the middle classification, as shown in Figures 14a to 14c. Figures 14A to 14C are diagrams showing the collection status of content requested by experts according to an embodiment of the present invention. Required content for each research field related to earthquake disaster prevention can be linked to the earthquake disaster prevention R&D roadmap in the future to additionally derive required content by detailed classification as shown in Figure 15. Figure 15 is a diagram showing a classification of content requested by the public, practitioners, and experts according to an embodiment of the present invention. In order to more quantitatively indicate the status of the content collected in this way, one or more detailed classifications collected can be counted and expressed as a collection rate as shown in FIGS. 16 and 17. Figure 16 is a diagram showing the collection rate of requested content by the public, practitioners, and experts according to an embodiment of the present invention, and Figure 17 is a diagram showing the collection rate of requested content by consumer and earthquake occurrence period according to an embodiment of the present invention. . In the content collection rate requested by consumer in Figure 17, the collection rate of over 77% was shown for the general public immediately and after the earthquake (short term) and for experts before and after the earthquake (short term), indicating that a good level of data collection was achieved. appear. However, the public collection rate after the earthquake occurred (long-term) was 25%, indicating that data collection for the relevant content was necessary. The collection rate of practitioners immediately after the earthquake and after the earthquake (short-term) was over 94%, indicating that the data was faithfully collected, but before and after the earthquake (long-term), the rate was low at 50-65%. The experts' post-earthquake occurrence (long-term) showed the highest figure of 100%, but the remaining stages showed a collection rate of 60-74%.

The collection rate by demand was the highest for practitioners at 79%, followed by the general public at 78% and experts at 73%, indicating that the requested content was well collected. The content collection rate by earthquake occurrence period shows a collection rate of 77% before the earthquake, 83% immediately after the earthquake, 86% after the earthquake (short-term), and 50% after the earthquake (long-term). It showed that content collection after the outbreak (long-term) was insufficient.

Therefore, in future earthquake disaster prevention-related research, research should be conducted on the long-term perspective after the earthquake, such as regeneration projects in the city where the earthquake occurred or the extent of socioeconomic damage.

In the embodiment of the present invention, the results, complements, and future plans of the research conducted over four years since 2018 were comprehensively described to prepare a user-tailored earthquake disaster prevention content sharing portal. First, surveys, expert interviews, and SNS trend analysis were conducted to confirm the content requested by the public, practitioners, and experts. Based on the results, the earthquake disaster prevention content classification system was continuously improved. Based on the results of previously conducted research and this year's research, the final number of detailed content items required for the classification system for each group was confirmed to be 54 for the public, 76 for practitioners, and 44 for experts.

In addition to collecting content related to earthquake disaster prevention, we directly measured and collected domestic geotechnical information important for earthquake disaster prevention research. For this purpose, regional ground property information (column diagram, N value, seismic wave velocity, etc.) was collected for a total of 1,528 locations over a period of four years, and ground property analysis was also performed through continuous field measurement using a speedometer.

In order to collect customized earthquake disaster prevention content, we selected 22 countries and research institutes that are judged to have relevant data. Among the various topics held by the relevant institutions, we selected earthquake, tsunami, and earthquake disaster prevention content to collect only earthquake disaster prevention content. Eight key words were used, including: With respect to the data initially collected through the key words, the final collected content excluding content that did not meet the needs of consumers and duplicate data was a total of 2,242, including 2,157 document content, 2 image content, and 71 video content.

To confirm whether the collected earthquake disaster prevention content faithfully reflected the needs of consumers, detailed content items requested by each group were compared with the collected earthquake disaster prevention content. The number of collected contents for each group was confirmed to be 42 for the public, 60 for practitioners, and 32 for experts, and the collection rate was 73 to 79%, respectively, showing a good collection status of more than 70% in all groups. However, when the collected content is divided by the time of the earthquake, the collection rate is 77~86% before the earthquake, immediately after the earthquake, and after the earthquake (short-term), but the collection rate is 50% after the earthquake (long-term). It was confirmed that data collection was insufficient.

Figure 18 is a configuration diagram schematically showing the configuration of the content providing unit 150 according to an embodiment of the present invention.

Referring to FIG. 18, the content provider 150 according to an embodiment of the present invention includes a classification block selection unit 210, a collection content selection unit 220, a chain supply unit 230, and a transfer path 240. It can be included.

The classification block selection unit 210 selects and outputs a classification block corresponding to the classification by subject or classification by time zone generated by the classification object derivation unit 110.

The content selection unit 220 selects and outputs collected content corresponding to the subject-specific classification block selected and output by the classification block selection unit 210, or corresponds to the time zone classification block selected and output by the classification block selection unit 210. Select and print the collected content.

The chain supply unit 230 supplies a connecting chain to connect the subject-specific classification blocks and time zone classification blocks selected and output from the classification block selection unit 210. In other words, the chain supply unit 230 supplies a connection chain to connect the blocks for the public, practitioners, and experts selected and output from the classification block selection unit 210, and the blocks for each block before, after, and regularly.

In addition, the chain supply unit 230 supplies a matching chain (Matching Block Chain) for connecting and matching the classification block selected and output from the classification block selection unit 210 and the content selected and output from the content selection unit 220.

That is, the chain supply unit 230 connects the blocks for each citizen, practitioner, and expert selected and output from the classification block selection unit 210 and the blocks before and after the occurrence through a connection chain, and the content collected here is connected to the matching chain ( Matching is done through Matching Block Chain.

The transfer path 340 transfers and outputs the combination 350 of the classified blocks and contents connected and matched through a matching chain by a device that converts rotational movement into linear movement, such as a conveyor belt.

In addition, the transfer path 340 can transfer and output the combination 350 of blocks for each subject and blocks for each time period that are connected to each other through a connection chain.

Figure 19 is a diagram showing examples of classification blocks by subject and blocks by time zone generated by the classification block generator according to an embodiment of the present invention.

Referring to FIG. 19, classification blocks according to an embodiment of the present invention include a block 410 for each subject and a block 420 for each time zone.

The subject-specific block 410 includes the public block 411; practitioner block (412); It may include an expert block 413.

The time zone block 420 includes the block before occurrence (421); Block immediately after occurrence (422); Post-occurrence (short-term) block (423); and a post-occurrence (long-term) block 424.

At this time, the subject block 410 and the time zone block 420 are each independent entities and may have a hexahedral or spherical shape.

Therefore, the first classification block is the public block 411, the second classification block is the practitioner block 412, the third classification block is the expert block 413, and the fourth classification block is the pre-occurrence block 421. , the fifth classification block may be a post-occurrence block 422, the sixth classification block may be a post-occurrence (short-term) block 423, and the seventh classification block may be a post-occurrence (long-term) block 424.

The first classification block 411 to the seventh classification block 424 are each independent objects, and according to the analysis result of the analysis unit 130, a matching chain 352 is formed as shown in FIG. 20. It can be connected and matched with the content block 354. Figure 20 is a diagram showing an example in which a first classification block is connected and matched with a content block through a matching chain according to an embodiment of the present invention.

In addition, the first to seventh classification blocks 411 to 424 are divided into a second classification block 412 and a fifth classification block ( 422) may be connected to or separated from each other through a connecting chain (354). Figure 21 is a diagram showing an example in which two classification blocks according to an embodiment of the present invention are connected to each other through a connection chain. For example, the connection body 350 in which the second classification block 412 and the fifth classification block 422 are connected to each other through a connecting chain 354 is immediately after the occurrence of the earthquake by the practitioner shown in FIG. 5B. It may be one of the corresponding contents.

And, the connection body 350 connected to the content block 354 through a matching chain 352 to the connection between the second classification block 412 and the fifth classification block 422 is, for example, shown in FIG. It can be an action manual for earthquake disaster field measures during on-site earthquake disaster work immediately after the occurrence of cracks by disaster management workers shown in Figures 13a and 13b.

As described above, according to the present invention, earthquake disaster prevention data scattered in various places is collected, the collected data is classified and analyzed to provide immediately usable content, and this can be shared through an earthquake disaster prevention content sharing portal. , a method and system for providing earthquake disaster prevention content can be realized through earthquake disaster prevention content classification.

Those skilled in the art to which the present invention pertains should understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features, and that the embodiments described above are illustrative in all respects and not restrictive. Just do it. The scope of the present invention is indicated by the claims described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

100: Earthquake disaster prevention content provision system 110: Classification target derivation unit
120: content collection unit 130: measuring instrument
140: analysis department 150: content provision department
160: Database 410: Block by subject
411: Public Block 412: Practitioner Block
413: Expert block 420: Time zone block
421: Block before occurrence 422: Block immediately after occurrence
423: Post-occurrence (short-term) block 424: Post-occurrence (long-term) block

Claims (10)

As a method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content in a system including a classification object derivation unit, content collection unit, measuring instrument, analysis unit, and content provision unit,
(a) the classification target deriving unit classifies required content by subject and time zone for earthquake disaster prevention;
(b) the classification target deriving unit deriving a collection target of earthquake disaster prevention content for each category according to the classification;
(c) the content collection unit collecting content information about the collection target of earthquake disaster prevention content for each category;
(d) the analysis unit analyzing field measurement data based on the collected content information; and
(e) the content provider providing requested content according to the analysis results through an earthquake disaster prevention content sharing portal;
Method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content including.
According to claim 1,
The step of classifying the requested content is to categorize items into before, after, and regular earthquakes, and to classify surveys, interviews, and SNS posts conducted by the public, practitioners, and experts within each item. Method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content.
According to claim 2,
The content requested from the public includes earthquake occurrence information, earthquake behavior tips, earthquake damage status, information on disaster victim support, reliable sources of earthquake disaster prevention information, evacuation routes and traffic conditions, information on shelters, and information on building damage recovery. Contains,
The information before the earthquake occurs includes ‘Earthquake behavior tips for high-rise buildings’, ‘Evacuation tips for foreigners residing in Korea’, ‘Outdoor earthquake behavior tips’, ‘Earthquake behavior tips while driving’, and ‘Earthquake behavior tips while using public transportation’. do,
Short-term information immediately after the occurrence of the above earthquake includes 'Guidelines for conduct after returning home', which contains the rules of conduct for citizens who evacuated to evacuation centers due to the above earthquake after safely returning to their residential facilities,
Long-term information after the occurrence of the earthquake is a method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content, including 'residential facility linkage support' for citizens who are unable to return to their residential facilities due to half or complete destruction of their residential facilities.
According to claim 2,
The contents requested for the above working-level workers are: 'Preparation and improvement of detailed manuals for earthquake work promotion' for local government workers, 'Active support and improvement of issues that are difficult to resolve on their own, including budget and manpower', for the central government. Cooperation', for victims and disaster victims, 'understanding of the use of relief facilities and concessions and consideration among victims', and for earthquake experts and researchers, 'research and analysis of earthquakes that may occur in the future after the earthquake'.
In the case of facility managers, 'earthquake work-related materials and repetitive training' for local government workers, 'support for rapid earthquake response and recovery' for the central government, and 'maintaining order in indoor relief centers' for victims and disaster victims. Includes 'concessions and consideration between victims and disaster victims' and 'research and development related to earthquake-resistant design and reinforcement' for earthquake experts and researchers.
It includes 'preparation of emergency fire roads' related to the earthquake disaster prevention plan before the occurrence of the above earthquake, and includes 'conducting emergency risk assessment' and 'provision of information on availability of medical support in other areas' immediately after the occurrence of the above earthquake. A method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content, including 'damage to industrial facilities' and 'securing residential facilities' in the long term after the occurrence.
According to claim 2,
The content required for the above experts is:
Before the occurrence of the earthquake, basic information on earthquake research, including 'seismic cycle information for each fault', 'maximum possible earthquake magnitude for each fault', and 'information on fault activity rate' for the fault causing the earthquake;
Geological ground investigation data including ‘earthquake-induced landslides’, ‘currentization of steep slope hazard maps’, ‘3D underground faults on the Korean Peninsula’, and ‘development of integrated velocity structure model’;
Information related to earthquake research and testing facilities, including 'domestic representative earthquake magnitude', 'magnitude correction coefficient calculation', 'development of attenuation equation based on domestic records', and 'development of seismic reinforcement technology for structural materials'; and
Information on securing earthquake monitoring capabilities, including 'research on early warning technology development', 'establishment of a preemptive response system through earthquake damage scenarios', and 'damage analysis for facility safety assessment';
Including,
A method of providing earthquake disaster prevention content through classification of earthquake disaster prevention content including 'seismic wave spectrum analysis' immediately after the occurrence of the above earthquake.
a classification object derivation unit that receives data from the user, classifies required content for earthquake disaster prevention by subject and time period, and derives collection targets for earthquake disaster prevention content for each category according to the classification;
a content collection unit that collects content information on objects of earthquake disaster prevention content for each category;
An instrument that measures ground amplification characteristics and geology at a possible earthquake site or an earthquake occurrence site based on the collected content information;
an analysis unit that analyzes the measured field measurement data based on the collected content information; and
a content provider that provides requested content according to the analysis results through an earthquake disaster prevention content sharing portal;
A system for providing earthquake disaster prevention content through classification of earthquake disaster prevention content including.
According to claim 6,
The measuring instrument measures fine motion at all times using a vibration detection sensor, recorder, and speedometer equipment to obtain constant fine motion measurement data,
The analysis unit compares the obtained constant motion measurement data with the ground investigation report and performs HVSR (Horizontal to Vertical Spectral Ratio) analysis to obtain ground properties through constant motion caused by an unspecified vibration source,
5% cosine tapering is used for the always-fine measurement waveform, and the frequency range used in the analysis is a 0.1 to 50 Hz Butterworth filter,
The result graph of the HVSR above is an earthquake disaster prevention content provision system through earthquake disaster prevention content classification to which a smoothing algorithm using the Konno-Ohmachi window is applied.
According to claim 7,
The above-mentioned regular motion measurement data is continuous data that records the movement of ground motion over time using a seismometer. In order to increase the number of data with such continuity, the data is divided and increased at regular time intervals to exclude noise around the seismometer. It is a material that has been
The analysis unit calculates the constant-motion measurement data by dividing it into time windows of 30 seconds, executes the HVSR analysis with 6 seconds overlapping between each time window, and determines the measurement point as a result of the HVSR analysis. Obtain the dominant frequency of the ground,
The dominant frequency is a specific frequency when an overlapping reflection phenomenon for vibration occurs within the upper layer of the ground and a resonance phenomenon that causes the ground surface to vibrate significantly occurs. A system for providing earthquake disaster prevention content through classification of earthquake disaster prevention content.
According to claim 8,
The analysis unit compares the penetration depth (soil layer thickness) of the bedrock included in the ground investigation report with the shear wave speed (V _s30 ) at the top 30 m of the soil layer, and sets the shear wave speed (Vs) to 4 for the penetration depth (soil layer thickness) of the bedrock. A system for providing earthquake disaster prevention content through classification of earthquake disaster prevention content, calculated by dividing by the ship's dominant frequency (4f).
According to clause 9,
The analysis unit determines whether the HVSR ratio is less than or equal to a certain standard of 3.0 based on the execution result of the HVSR analysis,
The result of converting the shear wave velocity (V _s30 ) at the top 30 m of the soil layer shows a difference of about 100 m/s,
Areas where the HVSR ratio has a value of 3.0 or more are analyzed as soft ground with a deep soil layer, and areas where the HVSR ratio has a value of 3.0 or less are analyzed as hard ground even if the dominant frequency is low. Earthquake disaster prevention content through classification of earthquake disaster prevention content. Delivery system.