JP2006337083A - Earthquake motion arrival determining system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an earthquake motion arrival determining system which exactly calculates time of arrival of earthquake motion to a building by using the emergency earthquake flash report, announced by the Meteorological Agency and activates with good timing, the measuring system of strains and cracks located in buildings. <P>SOLUTION: Emergency earthquake flash report, announced by the Meteorological Agency, is received by way of special lines in an internet distribution terminal 2, the received emergency earthquake flash report is transmitted from the internet distribution terminal 2 to internet connection terminals 1 placed near the buildings by way of the Internet. Based on the emergency earthquake flash report received with the internet connection terminal 1, the arrival time of the earthquake motion to the buildings is calculated with an earthquake arrival determining processing system 8. Also by referring to the database 15, having the attribute data of the buildings, it is determined whether the strains and cracks of the buildings are measured with an strain/crack measuring device 9, at the time of arrival of the earthquake motion to the buildings. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

 The present invention relates to a seismic motion arrival determination system that determines whether to measure distortion and cracking of a building when an earthquake motion arrives, using emergency earthquake warnings distributed by the Japan Meteorological Agency.

Up to now, using the seismic intensity information of the Japan Meteorological Agency, using the epicenter information that occurs after the earthquake occurs, the estimated ground motion of the area of interest is estimated, the damage database and the earthquake source information of the earthquake that occurred are compared There was a system to estimate.
In addition, there was a system that automatically operated the device by detecting earthquake motion, but until now, a seismometer was installed in the vicinity of the target building to detect the earthquake motion, and the device was based on that information. The device was not operated based on the accurate arrival time information of the seismic wave calculated based on the epicenter information.
Patent Documents 1 and 2 describe systems that estimate damage after the arrival of ground motion based on seismic waveforms captured by seismometers installed on their own. The measurement method of the accuracy measurement system was to measure periodically or after an earthquake (including immediately after).

JP 2003-161783 A (pages 3 to 5, FIG. 1) Japanese Patent Laid-Open No. 11-38862 (pages 4-7, FIG. 1)

  It is difficult to operate a high-accuracy strain crack measuring device in synchronization with the timing when earthquake motion shakes the building in the conventional building maintenance management measurement system. It was necessary to “construct an expensive seismometer system near the measurement point for synchronization” or “construct an expensive data recording system to continuously record high-precision measurement data”.

 The present invention has been made to solve the above-described problems, and uses the earthquake early warning published by the Japan Meteorological Agency to accurately calculate the time at which the earthquake motion reaches the building and is installed in the building. The purpose is to obtain a seismic motion arrival determination system that activates a strain and crack measurement device in a timely manner.

 In the seismic motion arrival determination system according to the present invention, a distribution device that receives an emergency earthquake bulletin from the Japan Meteorological Agency and distributes the received emergency earthquake bulletin via a network, a distribution device that is installed in the vicinity of a building and distributes the earthquake early warning From the receiving terminal that receives from the network via the network, the building database having the attribute data of the building, and the arrival time of the seismic motion to the building based on the earthquake early warning received by the receiving terminal, and the building database Referring to FIG. 2, the apparatus includes a ground motion arrival determination processing means for determining whether to measure the distortion and crack of the building when the ground motion reaches the building.

  As described above, the present invention receives an earthquake early warning from the Japan Meteorological Agency and distributes the received emergency earthquake warning via a network, installed in the vicinity of the building, and sends the earthquake early warning from the distribution device. Receiving terminals received via the network, building database with building attribute data, and calculating the arrival time of earthquake motion to the building based on the earthquake early warning received by the receiving terminal, and refer to the building database In addition, since there is a seismic motion arrival judgment processing means that judges whether to measure the strain and cracks of the building when the seismic motion reaches the building, the building manager can install the seismic observation system near the building by himself. Without installation, measurement of strain and cracks can be performed with good timing and without waste.

Embodiment 1 FIG.
FIG. 1 is an overall system diagram showing an earthquake motion arrival determination system according to Embodiment 1 of the present invention.
In FIG. 1, an Internet distribution terminal 2 (distribution device) is connected to a dedicated line of the Japan Meteorological Agency, and is connected to an Internet connection terminal 1 (reception terminal) installed at a base near a measurement point via the Internet. The earthquake motion arrival determination processing system 8 (earthquake motion arrival determination processing means) determines whether or not to perform high-accuracy data measurement based on the emergency earthquake alert received at a base near the measurement point. The strain crack measuring device 9 is installed in a building to be maintained such as a bridge, a highway, a dam, a reservoir, a high-rise building, and is activated according to the determination result of the earthquake motion arrival determination processing system 8 and is shaken by the reached earthquake motion. Collect high-precision strain and crack data of the building inside.

  FIG. 2 is a flowchart showing information distribution using the Internet of the earthquake motion arrival determination system according to Embodiment 1 of the present invention.

FIG. 3 is a flowchart showing a process for determining the arrival of the ground motion at the destination point from the earthquake early warning of the ground motion arrival determination system according to Embodiment 1 of the present invention.
In FIG. 3, the database 11 has an earthquake travel time table for calculating the arrival times of the P wave and S wave of the earthquake, and a distance attenuation formula for calculating the predicted seismic intensity and the predicted acceleration. The ground information database 13 has the ground information of the building to be measured. The database 15 (building database) is used to determine the number of estimated seismic intensity and estimated seismic acceleration above which high-accuracy strain and crack measurement is performed. ) Is stored, and the presence or absence of a seismic construction method.

FIG. 4 is a diagram showing a matrix table for determining the measurement start of the earthquake motion arrival determination system according to Embodiment 1 of the present invention and a setting example.
In FIG. 4, the measurement start determination reference | standard is shown for every attribute of a measurement object building.

Next, the operation will be described.
This earthquake motion arrival judgment system transmits the emergency earthquake bulletin distributed by the Japan Meteorological Agency to the vicinity of the building where the measurement is performed via the Internet, and the measurement timing and necessity of measurement from the emergency earthquake bulletin and the building database at the transmission point. And measuring strain and cracks during earthquake motion according to the judgment result.
In FIG. 1, the earthquake early warning is received by the Internet distribution terminal 2 connected to a dedicated line of the Japan Meteorological Agency, and the contents are immediately installed near the measurement point by using the Internet network from the Internet distribution terminal 2 with the IP protocol. Is transmitted to the connected Internet terminal 1.
The earthquake early warning that arrives at the Internet connection terminal 1 near the measurement point is processed by the earthquake motion arrival determination processing system 8 to determine whether or not high-precision data measurement is necessary, and according to the determination result, the high level of distortion and cracking is determined. By starting the strain crack measuring device 9 capable of measuring accuracy, high-accuracy strain and crack data of the building that is shaking due to the earthquake motion that has arrived are collected.

Next, the distribution of the earthquake early warning will be described with reference to FIG.
When an earthquake is detected through the nationwide seismic network installed and managed by the Japan Meteorological Agency (step S1), the Meteorological Agency creates an emergency earthquake bulletin, and this emergency earthquake bulletin is distributed over the Internet through a dedicated line with the Japan Meteorological Agency. The content is distributed to the terminal 2 (Step S2), and the Internet distribution terminal 2 immediately distributes the content via the Internet to the Internet connection terminal 1 installed at the base near the measurement point using the IP protocol (Step S3). This is received by the Internet connection terminal 1 (step S4).
The earthquake early warning received by the Internet connection terminal 1 is processed by the seismic motion arrival determination processing system 8 and activates the strain crack measurement device 9 that measures strain and cracks according to the determination result.

The process of the earthquake motion arrival determination processing system 8 will be described with reference to FIG.
When an earthquake early warning having an earthquake occurrence time, an epicenter coordinate (latitude, longitude, depth) and an earthquake magnitude (magnitude) is received (step S11), an object to be measured is based on the received emergency earthquake early warning and information in the database 11. (1) Epicenter distance, (2) P wave arrival time, (3) S wave arrival time, (4) Estimated seismic intensity and acceleration are calculated (step S12).
Next, using the earthquake information database 13, the seismic intensity and acceleration are corrected by the ground structure of the area of the building to be measured (step S13). Further, whether or not the measurement should be started with reference to the database 15 in which the specifications of the building are stored in order to determine how much the estimated seismic intensity and the estimated seismic acceleration are to be used for highly accurate strain and crack measurement. Is determined (step S14).
As described above, the necessity of measurement based on the combination of the attribute data of the building to be measured (building type, construction method, years after construction) and the characteristics of the earthquake that occurred (estimated seismic intensity at the measurement point, magnitude of earthquake) Therefore, this method has an effect that it is possible to leave high-precision measurement data finely with a certain standard for each building type.

Next, the determination matrix of FIG. 4 used for determining the start of measurement in the determination process of step S14 will be described.
According to recent research on ground motion and structural shaking, even if the value of seismic motion perceived by the human body (measured seismic intensity) is small in earthquakes that occurred at a long distance, Since long-period ground motion propagates far away, it has been reported that buildings with a long natural period resonate with it and get damaged.
The manager of the building needs to set conditions for performing high-precision measurement in consideration of the possibility of such a phenomenon. In this system, by creating a judgment matrix to determine the judgment criteria for starting measurement of high-precision strain and cracks,
・ Setting measurement conditions according to the type of building to be measured, construction method, and years after construction.
・ Setting measurement conditions using estimated seismic intensity and earthquake magnitude.
Is possible.
Here, the criteria for starting measurement for each measurement target building = (Estimated seismic intensity N or higher calculated from the earthquake early warning) OR (Earthquake magnitude M or higher)

By doing so, not only when the estimated seismic intensity at the building point is above a certain level, but also when the earthquake magnitude (earthquake scale) is above a certain level, the high-precision measuring device is operated regardless of the magnitude of the estimated seismic intensity. Setting is possible, and there is an effect that measurement can be performed without omission.

According to the first embodiment, since the earthquake early warning published by the Japan Meteorological Agency is used, a high-accuracy measuring device for strain and cracks can be installed without having the building manager install an earthquake observation system in the vicinity of the building. There is an effect that the operation can be performed at a low cost with good timing.
In addition, since the earthquake early warning is transmitted to the measurement point using the Internet, there is an effect that a system that covers a wide area can be constructed at low cost even when the measurement point is in various places.
Also, the necessity of measurement is determined based on the combination of the attribute data of the building to be measured (building type, construction method, years after construction) and the characteristics of the earthquake that occurred (estimated seismic intensity at the measurement point, magnitude of the earthquake) Therefore, there is an effect that fine and high-precision measurement data can be left on a certain basis for each building type.

Embodiment 2. FIG.
FIG. 5 is an overall system diagram showing an earthquake motion arrival determination system according to Embodiment 2 of the present invention.
In FIG. 5, 8 and 9 are the same as those in FIG. The power line information distribution center 5 (distribution device) is connected to a dedicated line of the Japan Meteorological Agency and receives power line information installed at a base near the measurement point via the power line communication network by the power line information column distribution device 6. The earthquake early warning is distributed to the terminal 7 (receiving terminal).
FIG. 6 is a flowchart showing information distribution using power line signal transmission in the seismic motion arrival determination system according to Embodiment 2 of the present invention.

Next, the operation will be described.
In the second embodiment, the earthquake early warning is received by the power line information distribution center 5 connected to the dedicated line of the Japan Meteorological Agency, and the contents are immediately transmitted by the power line information column distribution device 6 via the power line communication network. The information is distributed to the power line information receiving terminal 7 installed at the base near the measurement point. The earthquake early warning received by the power line information receiving terminal 7 is processed by the seismic motion arrival determination processing system 8 to determine whether or not to perform high-precision data measurement, and according to the determination result, high-precision measurement of strain and cracks is possible. When the strain crack measuring device 9 is activated, high-accuracy strain and crack data of the building being shaken by the earthquake motion that has arrived are collected.

Hereinafter, information distribution according to Embodiment 2 will be described with reference to FIG.
In FIG. 6, the earthquake early warning is transmitted to the vicinity of the measurement point using the power line communication network.
When an earthquake is detected through the national earthquake observation network installed and managed by the Japan Meteorological Agency (step S21), the Meteorological Agency creates an emergency earthquake bulletin, and this emergency earthquake bulletin is a power line connected to the Meteorological Agency by a dedicated line. The power line information distribution center 5 that has received the information is distributed to the information distribution center 5 (step S22), and immediately broadcasts the contents to the power line information column distribution device 6 using an optical fiber (step S23). The power line information pole distribution device 6 that has received the information is distributed to the power line information receiving terminal 7 installed at the base near the measurement point via the power line communication network (step S24), and the power line information receiving terminal 7 (Step S25).
The earthquake early warning received by the power line information receiving terminal 7 is processed by the earthquake motion arrival determination processing system 8 as in the first embodiment, and the strain crack measuring device 9 is activated according to the determination result.

  According to the second embodiment, since the earthquake early warning is transmitted to the measurement point using the power line signal transmission, the power line is supplied even to the place where the measurement target building cannot use the Internet via the telephone line. The system can be configured at low cost wherever there is.

Embodiment 3 FIG.
FIG. 7 is an overall system diagram showing an earthquake motion arrival determination system according to Embodiment 3 of the present invention.
In FIG. 7, 8 and 9 are the same as those in FIG. The quasi-zenith satellite gateway station 3 (distribution device) is connected to a dedicated line of the Japan Meteorological Agency, and distributes the earthquake early warning to the satellite reception terminal 4 (reception terminal) installed at the base near the measurement point via the quasi-zenith satellite. .
FIG. 8 is a flowchart showing information distribution using the quasi-zenith satellite of the earthquake motion arrival determination system according to Embodiment 3 of the present invention.

Next, the operation will be described.
In the third embodiment, the earthquake early warning is received by the quasi-zenith satellite gateway station 3 connected to the dedicated line of the Japan Meteorological Agency, and the contents are immediately installed at the base near the measurement point via the quasi-zenith satellite. It is distributed to the receiving terminal 4. The earthquake early warning received by the satellite receiving terminal 4 is processed by the seismic motion arrival determination processing system 8 to determine whether or not high-precision data measurement is performed, and according to the determination result, strain and crack can be measured with high accuracy. When the measuring device 9 is activated, high-accuracy strain and crack data of the building being shaken by the earthquake motion that has arrived are collected.

Hereinafter, information distribution according to Embodiment 3 will be described with reference to FIG.
In FIG. 8, the earthquake early warning is transmitted to the vicinity of the measurement point using the satellite data communication function of the quasi-zenith satellite.
When an earthquake is detected through the nationwide seismic observation network installed and managed by the Japan Meteorological Agency (step S31), the Meteorological Agency prepares an emergency earthquake bulletin, and this emergency earthquake bulletin is connected to the Japan Meteorological Agency by a dedicated line. The quasi-zenith satellite gateway station 3, which is distributed to the satellite gateway station 3 (step S 32) and receives it, immediately uplinks the contents to the quasi-zenith satellite and is installed at the base near the measurement point. Is broadcast (step S33). The earthquake early warning is received by the satellite receiving terminal 4 (step S34).
The earthquake early warning received by the satellite receiving terminal 4 is processed by the earthquake motion arrival determination processing system 8 as in the first embodiment, and the strain crack measuring device 9 is activated according to the determination result.

  According to the third embodiment, since the earthquake early warning is transmitted to the measurement point using the satellite data communication function of the quasi-zenith satellite, the system is reliably constructed even if the measurement target building is a mountainous area or a remote area. There is an effect that can be done.

  In addition, in the above-described first to third embodiments, the distribution via the Internet, the power line communication network, and the quasi-zenith satellite has been described separately. However, if the earthquake early warning is transmitted simultaneously through these networks, The measurement point can be reached more reliably.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole system figure which shows the seismic-motion arrival determination system by Embodiment 1 of this invention. It is a flowchart which shows the information delivery using the internet of the earthquake motion arrival determination system by Embodiment 1 of this invention. It is a flowchart which shows the process which determines the earthquake motion arrival in the destination point from the emergency earthquake early warning of the earthquake motion arrival determination system by Embodiment 1 of this invention. It is a figure which shows the matrix table which determines the measurement start of the earthquake motion arrival determination system by Embodiment 1 of this invention, and a setting example. It is a whole system figure which shows the seismic-motion arrival determination system by Embodiment 2 of this invention. It is a flowchart which shows the information delivery using the power line signal transmission of the earthquake motion arrival determination system by Embodiment 2 of this invention. It is a whole system figure which shows the seismic-motion arrival determination system by Embodiment 3 of this invention. It is a flowchart which shows the information delivery using the quasi-zenith satellite of the earthquake motion arrival determination system by Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internet connection terminal 2 Internat distribution terminal 3 Quasi-zenith satellite gateway station 4 Satellite receiving terminal 5 Power line information distribution center 6 Power line information column top distribution apparatus 7 Power line information receiving terminal 8 Earthquake motion arrival judgment processing system 9 Strain crack measuring apparatus 11 Database 13 Ground Information Database 15 Database

Claims (4)

  A distribution device that receives the earthquake early warning of the Japan Meteorological Agency and distributes the received earthquake early warning via the network, a receiving terminal that is installed in the vicinity of the building and receives the earthquake early warning from the distribution device via the network Calculating the arrival time of the earthquake motion to the building based on the earthquake early warning received by the receiving terminal and the building database having the attribute data of the building, and referring to the building database, An earthquake motion arrival determination system, comprising: an earthquake motion arrival determination processing unit that determines whether to measure strain and crack of the building when the earthquake motion reaches the building.   The earthquake motion arrival determination system according to claim 1, wherein the network is the Internet.   The earthquake motion arrival determination system according to claim 1, wherein the network is a power line communication network. 2. The earthquake motion arrival determination system according to claim 1, wherein the network is a satellite communication via a quasi-zenith satellite.