JP7106472B2 - Method and program for estimating empirical maximum interstory drift angle - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law Presentation image at the 2018 Architectural Institute of Japan Conference [Tohoku] held from September 4th to September 6th, 2018

Application of Article 30, Paragraph 2 of the Patent Act Architectural Institute of Japan Technical Report, Vol. 25, No. 59, pp. 159-164, published in February 2019

The present invention relates to a method and a program for estimating an empirical maximum story drift angle.

Conventionally, in order to judge whether or not a building damaged by an earthquake can be used, the Ministry of Land, Infrastructure, Transport and Tourism supervised the use of the "Earthquake Damage Classification Criteria and Restoration Technical Guidelines" (non-patented). Reference 1). Such non-patent document 1 is used for the purpose of classifying the degree of damage to buildings and determining the necessity of reinforcement for continued use.
The amount of deformation of a building can be defined by a numerical value called maximum story drift angle. That is, the maximum story deformation angle at the time of an earthquake is related to the deterioration of the building (damage condition of the building), and is one of the standards for determining the degree of damage to the building. In Non-Patent Document 1, the largest deformation that occurred in a building during an earthquake is expressed as an angle called "experienced maximum inter-story deformation angle". Also, in Non-Patent Document 1, the empirical maximum story drift angle is assumed to be a value estimated from the residual deformation after an earthquake and the state of damage to walls and the like.

Criteria for determining the degree of damage to earthquake-damaged buildings and technical guidelines for restoration (published by the Japan Building Disaster Prevention Association)

By the way, as is clear from Non-Patent Document 1, a certain amount of knowledge has been obtained regarding the correlation between the empirical maximum story drift angle and the state of damage to buildings. However, in reality, the correlation cannot be quantified, and there is a problem that it depends on the subjectivity of the viewer. For example, when focusing on the method of estimating the empirical maximum story drift angle of a building, it is estimated from the state of damage to the interior and exterior materials. Individual differences may occur in the estimation results for each model.

The present invention has been made in view of the above circumstances, and provides a method and a program for estimating an experienced maximum story drift angle that can easily and accurately estimate an experienced maximum story drift angle without causing individual differences in results. intended to provide

The invention according to claim 1, for example, as shown in FIGS. 3, a method of estimating the empirical maximum inter-story drift angle from cracks f1 to f6 of the wall cloth generated at the corners of the openings 2a and 3a formed in the walls 2 and 3,
Measuring the width or length of the cracks f1 to f6,
The method is characterized by estimating the empirical maximum inter-story drift angle from the measurement results of the cracks f1 to f6 by an estimation formula based on the results of experiments performed in advance.

According to the first aspect of the invention, the empirical maximum interlaminar deformation angle and the cracks occurring in the wall crosses are quantified based on the results of experiments conducted in advance. From the actual width or length of the cracks f1 to f6 in the wall cloth that occurred in the corners, it is possible to easily and accurately estimate the empirical maximum story drift angle using an estimation formula based on the results of experiments conducted in advance. , there is no individual difference in the estimation result.

The invention according to claim 2 is, for example, as shown in FIGS.
The estimated formula is
γe=(Bu+0.26)/110 Expression (1)
γe=(Bd+0.66)/180 Expression (2)
γe=(Lu+43.6)/25200 Expression (3)
γe=(Ld+163.5)/55100 Expression (4)
is either
γe: maximum interlaminar deformation angle (rad), Bu: crack width (mm) generated at the upper corner of the openings 2a and 3a, Bd: crack generated at the lower corner of the openings 2a and 3a. Crack width (mm), Lu: Crack length (mm) generated at the upper corner of the openings 2a and 3a, Ld: Crack length generated at the lower corner of the openings 2a and 3a It is characterized by being the height (mm).

According to the second aspect of the invention, the empirical maximum story drift angle can be estimated from the width or length of the cracks f1 to f6 depending on the positions of the cracks f1 to f6 with respect to the openings 2a and 3a. , the accuracy in estimating the empirical maximum story drift angle can be improved.

The invention according to claim 3 is, for example, as shown in FIGS.
The damage degree of the building 1 is determined based on the estimated empirical maximum story drift angle.

According to the third aspect of the invention, the degree of damage to the building 1 is determined based on the estimated empirical maximum story drift angle. can.

The invention according to claim 4 is, for example, as shown in FIGS.
A seismic performance residual rate R of the building 1 is determined based on the estimated empirical maximum story drift angle.

According to the fourth aspect of the invention, the seismic performance residual rate R of the building 1 is determined based on the estimated empirical maximum story drift angle. R can be reported.

The invention according to claim 5 is, for example, as shown in FIG.
Estimation of the empirical maximum story drift angle is performed by the arithmetic processing unit 10,
The arithmetic processing unit 10 is characterized in that it acquires measurement result information relating to the widths or lengths of the cracks f1 to f6 measured in advance.

According to the invention of claim 5, the arithmetic processing unit 10 acquires measurement result information related to the width or length of the cracks f1 to f6 measured in advance, and based on this, the empirical maximum story drift angle Since the estimation can be performed, if the crack width and length are measured in advance, the arithmetic processing unit 10 can easily estimate the empirical maximum story drift angle.

The invention according to claim 6 is, for example, as shown in FIGS.
The cracks f1 to f6 are photographed by a camera 16, and the processing unit 10 acquires the images of the cracks f1 to f6 photographed by the camera 16 as the measurement result information.

According to the sixth aspect of the invention, the arithmetic processing unit 10 can use the images of the cracks f1 to f6 captured by the camera 16 as the measurement result information, so the crack width and length can be easily measured. can be done. Therefore, it is possible to improve the simplicity of estimating the empirical maximum story drift angle.

The invention according to claim 7 is a program,
A computer 10 having a storage device 12 that stores an estimation formula based on experimental results that have been performed in advance,
Corners of openings 2a and 3a formed in walls 2 and 3 of a building 1 having gypsum boards provided on at least one surface and wall cloth attached to the surfaces of the gypsum boards. measurement result information acquiring means 11a for acquiring measurement result information relating to the width or length of the cracks f1 to f6 of the wall cloth generated at the corners;
It is characterized by functioning as estimation means 11b for executing the estimation formula and estimating the empirical maximum story drift angle from the measurement results of the cracks f1 to f6 acquired by the measurement result information acquisition means 11a.

According to the seventh aspect of the invention, the empirical maximum interlaminar deformation angle and the cracks f1 to f6 occurring in the wall cross are quantified based on the results of experiments conducted in advance, and the openings 2a formed in the walls 2 and 3 are quantified. , 3a from the actual width or length of the cracks f1 to f6 in the wall cloth generated at the corners of 3a. is possible, and individual differences do not occur in the estimation results.

According to the present invention, it is possible to simply and accurately estimate the empirical maximum story drift angle without causing individual differences in results.

1 is a plan view showing an example of a building damaged by an earthquake; FIG. FIG. 10 is a diagram showing a state in which the wall cloth is cracked at the corner of the sweep-out window type opening. FIG. 10 is a diagram showing a state in which the wall cloth is cracked at the corner of the tall window type opening. FIG. 10 is a table showing the correlation between the experienced maximum story drift angle and the damage situation of the building partially quoted from the "Damage Degree Classification Criteria and Restoration Technical Guideline for Earthquake Damaged Buildings". 4 is a graph showing experimental results showing the correlation between the crack width generated in the upper corner of the opening and the empirical maximum story drift angle. 4 is a graph showing experimental results showing the correlation between the width of a crack generated in the lower corner of an opening and the empirical maximum story drift angle. 4 is a graph showing experimental results showing the correlation between the length of a crack generated in the upper corner of an opening and the empirical maximum story drift angle. 4 is a graph showing experimental results showing the correlation between the crack length generated in the lower corner of the opening and the empirical maximum story drift angle. It is a table|surface which shows the structural calculation result outline|summary in the building damaged by the earthquake, and the estimation result of the empirical maximum story drift angle. FIG. 10 is a graph showing the results of earthquake resistance performance evaluation of a building (property A) that was damaged by an earthquake; FIG. 4 is a graph showing results of earthquake resistance performance evaluation of a building (property B) that was damaged by an earthquake. It is a figure which shows the outline|summary of an arithmetic processing unit. It is a table showing the relationship between the experienced maximum story drift angle and the seismic performance residual rate quoted from "Damage degree classification criteria and recovery technical guidelines for earthquake-damaged buildings". 4 is a flowchart for explaining a method of estimating an empirical maximum story drift angle;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below have various technically preferable limitations for carrying out the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples. do not have.

Reference numeral 1 in FIG. 1 indicates a building. This building 1 is a wooden house damaged by an earthquake with a maximum seismic intensity of 7, and comprises a first floor 1a and a second floor 1b. A wall cloth is pasted on the wall of the first floor 1a and the wall of the second floor 1b as a finishing material on the side of the room.

At a plurality of locations indicated by triangular marks "▴" on the wall of the first floor 1a and the wall of the second floor 1b, there are cracks (fissures) in the wall cloth due to deformation of the walls due to the earthquake. Such wall cloth cracks are more likely to occur in walls with openings than in walls without openings.

The wall 2 shown in FIG. 2 is provided on either the first floor 1a or the second floor 1b of the building 1, and has a plurality of cracks f1, f2, and f3 in the wall cloth. The wall 2 is formed with an opening 2a that constitutes a so-called sweep window for the entry and exit of people. there is

The wall 3 shown in FIG. 3 is provided on either the first floor 1a or the second floor 1b of the building 1, and has a plurality of cracks f4, f5, and f6 in the wall cloth. The wall 3 is formed with an opening 3a that constitutes a so-called tall window that is not intended for people to enter and exit. is occurring.

The walls 2 and 3 shown in FIGS. 2 and 3 are provided with a gypsum board on one side, and a wall cloth is pasted thereon. A siding material is provided on the other surface.

Fig. 4 shows the experienced maximum inter-story drift angle, degree of damage, and interior material (finishing material: wall cloth), partially quoted from the "Damage Classification Criteria for Earthquake Damaged Buildings and Technical Guidelines for Restoration" supervised by the Ministry of Land, Infrastructure, Transport and Tourism. and a table showing the correlation with damage conditions in the opening of the exterior material (siding).

By comparing the plurality of cracks f1 to f6 that occurred in the wall cloth of the walls 2 and 3 with the table shown in FIG. It is possible to derive the degree of damage to the building.

However, it has not been possible to quantify the correlation between the empirical maximum interstory drift angle and the damage condition of the building (here, cracks f1 to f6 in the wall cloth). In other words, if only the table shown in FIG. 4 was used, it was not possible to quantitatively judge which stage in the table shown in FIG. 4 the cracks f1 to f6 of the wall cloth were.

Therefore, in the present embodiment, a method and a program for estimating the experienced maximum story drift angle and thus the degree of damage to the building based on the lengths and widths of cracks f1 to f6 in the wall cloth will be described.

Here, when the building 1 is subjected to seismic force and deforms in the horizontal direction, the relative horizontal deformation with respect to the floor below each floor is called "story deformation", and the value obtained by dividing this value by the "floor height" is " It is called interstory drift angle. Due to the horizontal shaking of an earthquake, the story drift angle changes from moment to moment. A large deformation shall be called the "experienced maximum story drift angle".

The method of estimating the empirical maximum story drift angle is to first conduct a static horizontal load test of a wall specimen constructed in the same manner as a building such as a house to be sold, and crack the wall cloth. A static force is applied by connecting a hydraulic jack to the load girder provided at the upper end of the wall of the specimen. The load schedule is displacement control based on the apparent shear deformation angle, and , 1/15 rad (hereinafter referred to as a specific deformation angle) in alternating positive and negative cycles. However, only at 1/15 rad, the force is applied once positively and negatively. The unit rad is radian, which is the unit of angle (plane angle) in the international system of units. Also called arc.
The horizontal load is measured by a load cell installed between the load-bearing girder and the hydraulic jack, and the horizontal displacement of the load-bearing girder and base and the vertical displacement of the column are measured by displacement gauges.

The time to record the damage (cracks) of the wall cloth assumes the state after the earthquake. and the time when the load becomes 0 (hereinafter referred to as 0 load) and the time when the horizontal displacement becomes 0 after further unloading (hereinafter referred to as 0 displacement).
Observation and recording methods are to record the width and length of cracks using visual inspection by an observer and a crack scale.

As a result of conducting such an experiment, cracks occurred in the corner wall cloth in the opening of the wall, which was the test specimen, after 1/100 rad, and the crack passed up and down at 1/75 rad. The crack width increased when the load was unloaded from the deformation angle. The main damage conditions observed on the finished surface of the wall cloth attached to the gypsum board were twisting, blistering, and breakage of the wall cloth, cracking, crushing, out-of-plane floating and peeling of the gypsum board, and plasterboard. There were mutual slippage between boards and screws floating, punching out, breaking and pulling out. As for the cracks at the corners of the opening, the width of the cracks varies depending on the applied force on the opening side and the applied force on the closing side at the time of deformation and when the load is 0, but there is not much difference when the displacement is 0. A similar tendency was obtained when the wall, which was the specimen, was an inner wall or an outer wall, and when the opening shape and layout method were different. The crack length was the same regardless of the direction of applied force, and was almost the same at the time of displacement, 0 load and 0 displacement.

For the correspondence relationship between the state of the test specimen in the experiment and the actual building 1, it was assumed that the maximum experienced inter-story deformation angle was the specific deformation angle during the experiment, and the state of the building 1 after the earthquake was 0 displacement during the experiment. . Then, the experienced maximum inter-story deformation angle of the building 1 after the earthquake is estimated by paying attention to the damage conditions in the experiment at a specific deformation angle and when the displacement after unloading is 0, especially the crack width and length of the opening corner.

Figures 5 to 8 show the relationship between the experienced maximum story drift angle and the width and length of cracks at the top and bottom corners of the sweep window type opening and the top and bottom corners of the tall window type opening. . FIG. 5 is a graph showing experimental results showing the correlation between the width of a crack generated in the upper corner of an opening and the empirical maximum story drift angle. FIG. 6 is a graph showing experimental results showing the correlation between the width of a crack generated in the lower corner of the opening and the empirical maximum story drift angle. FIG. 7 is a graph showing experimental results showing the correlation between the length of a crack generated in the upper corner of the opening and the empirical maximum story drift angle. FIG. 8 is a graph showing experimental results showing the correlation between the length of a crack generated in the lower corner of the opening and the empirical maximum story drift angle.
For each crack width and length, calculate the average value (Ave) and standard deviation (σ) for each experienced maximum story drift angle, and approximate the average value and average value ± σ each. It is shown in the figure as an estimated index.

Equations (1) to (4) below show the estimation equations for the empirical maximum story drift angle using the approximate straight line of the mean value. For cracks in the sweep window type opening and the tall window type opening in building 1, the intersection of the average value and the straight line can be estimated as the deformation angle experienced by the wall, and the average value ± σ is shown as the range of variation. .
Formula (1) γe=(Bu+0.26)/110
Formula (2) γe=(Bd+0.66)/180
Formula (3) γe=(Lu+43.6)/25200
Formula (4) .gamma.e=(Ld+163.5)/55100
In these formulas (1) to (4),
γe: Experienced maximum story drift angle (rad)
Bu: Crack width (mm) generated at the upper corner of the opening
Bd: Crack width (mm) generated at the lower corner of the opening
Lu: Crack length (mm) generated at the upper corner of the opening
Ld: Crack length (mm) generated at the lower corner of the opening
and

However, if the cracks in the gypsum board become larger as the deformation increases, the cracks will collapse due to repeated deformation during an earthquake, making it difficult to measure the cracks. /50 rad. 1/300 rad to 1/100 rad if the cut wall cloth on the flat part of the wall that is not the corner of the opening passes up and down, 1/150 rad if the screw is conspicuously lifted, and 1/30 rad if the screw is pulled out or punched out. is the estimated index of the empirical maximum story drift angle.

In addition, the applicant conducted an earthquake damage survey after the Kumamoto earthquakes that occurred on April 14 and 16, 2016, and estimated the experienced maximum story drift angle for properties in Mashiki-cho (property A and B). In the damage investigation, the empirical maximum story drift angle was estimated from the width of the crack generated in the opening of the inner wall and the estimation formula (1), and the results are shown in the table of FIG. In addition, the measurement of cracks in the damage survey was performed for the width of the largest crack in the visual observation due to the investigation time.

The table in FIG. 9 shows the results of the critical strength calculations of surveyed objects A and B. The safety factor of the first floor against story shear force at the safety limit is 3.6 times in the X direction and 2.6 times in the Y direction for Property A, and 2.8 times in the X direction and 3.0 times in the Y direction for Property B. rice field.

Figures 10 and 11 show KiK-net Mashiki and Meteorological Agency Mashiki observed in the Building Standards Act (at the safety limit) and in the vicinity from the reduction rate and equivalent period due to damping calculated from the skeleton curve reduced to a one-degree-of-freedom system. Fig. 9 shows the relationship between the response values obtained by calculating the required strength curve of the seismic waves in Machimiyaen, and the inter-story deformation angle according to them. The inter-story deformation angle of the first floor by calculation of critical strength was 1/276 rad in the X direction of property A and 1/286 rad in the Y direction of property B.

The inter-story drift angle for observed seismic waves is 1/74 to 1/303 rad in the X direction of property A, and 1/78 to 1/274 rad in the Y direction of property B. /180 (variation range 1/305 to 1/125) rad and 1/155 (variation range 1/245 to 1/110) rad. It is considered that the maximum story drift angle can be estimated.

The applicant conducted a static loading test on the wall, showed the relationship between the cracks occurring in the upper and lower corners of the opening and the empirical maximum story drift angle, and the crack width occurring in the upper and lower corners of the opening We proposed a method to quantitatively estimate the empirical maximum interstory drift angle from the length. Furthermore, as a result of trying to estimate the empirical maximum story drift angle using damage surveys of actual damaged houses, it was found that the estimation results were generally valid and quantitatively evaluated by comparing the results of structural calculations and the story drift angle obtained from the surrounding observed seismic waves. It was confirmed that it can be used as a method for estimating the empirical maximum story drift angle.

Based on the above, it is possible to estimate the empirical maximum story drift angle from the width and length of cracks generated at the upper and lower corners of the opening, and by extension, it is possible to estimate the degree of damage to the building. ing. Then, such an empirical maximum story drift angle can be estimated by the arithmetic processing device 10 .

The arithmetic processing unit 10 is a computer having a storage unit 12, a display unit 13, an input unit 14, a communication unit 15, a microprocessor (control unit 11), etc., as shown in FIG. For example, the processing unit 10 is a mobile phone (for example, a smart phone, a feature phone), a PDA (Personal Digital Assistant), a desktop personal computer, a laptop personal computer (notebook personal computer), a palmtop personal computer, a tablet type personal computer.

The control unit 11 controls the entire arithmetic processing unit 10 including the storage unit 12 and the like based on a control program (not shown) stored in the storage unit 12. It functions as interstory drift angle estimating means 11b, damage level determining means 11c, and seismic performance remaining rate determining means 11d.

The storage unit 12 includes a large-capacity storage medium such as a hard disk drive and flash memory, and a semiconductor storage medium such as ROM and RAM. The storage unit 12 stores the aforementioned control program, and also temporarily stores various data required for the control operation of the control unit 11 . The storage unit 12 also stores estimation formula data 12a, damage degree determination data 12b, and seismic performance residual rate determination data 12c.

The display unit 13 is a display device in the arithmetic processing unit 10, and employs, for example, a liquid crystal display. The display unit 13 in this embodiment is incorporated in the housing of the processing unit 10 and displays a display screen on the display surface based on a display control signal from the control unit 11 .

The input unit 14 is an input device in the arithmetic processing device 10, and employs, for example, a keyboard and a mouse. The input unit 14 in this embodiment is incorporated in the housing of the arithmetic processing device 10 , and can input characters and the like on the display screen of the display unit 13 .

The communication unit 15 receives a communication signal from the control unit 11 and sends the communication signal to a network such as LAN or WAN. Also, the communication unit 15 receives a communication signal from the network and outputs this communication signal to the control unit 11 . The communication unit 15 in this embodiment is built in the housing of the arithmetic processing device 10 .

A camera 16 is also connected to the processor 10 . In this embodiment, the camera 16 is used to photograph cracks in the wall cloth. That is, the camera 16 functions as an input device for inputting image information of cracks recorded on the recording medium of the camera 16 to the arithmetic processing device 10 . In this case, the processor 10 has an interface (not shown) for external input.
Note that when a crack generated in the wall cloth is measured by a crack scale, crack information (crack width or length dimension information) to the arithmetic processing unit 10 can be input from the input unit 14 . When inputting information from the input unit 14, an input screen for crack information is displayed on the display unit 13, and input is performed on the input screen.

Note that the camera 16 is externally connected to the processing unit 10 in this embodiment, but is not limited to this, and may be built in the processing unit 10 . When the processing unit 10 is, for example, a mobile phone such as a smart phone or a laptop personal computer, the camera 16 is often built in. If it is an arithmetic processing unit 10 with a built-in camera 16, it can perform everything from obtaining dimensional information on the width and length of cracks, estimating the experienced maximum story drift angle, determining the degree of damage, and determining the rate of seismic performance remaining. Since it can be done, it is excellent in convenience.

The control unit 11 functions as a measurement result information acquisition unit 11 a , acquires information (measurement result information) related to cracks from the camera 16 or the input unit 14 , and stores the information in the storage unit 12 . From the image information input from the camera 16, for example, from a two-dimensional image obtained by photographing a three-dimensional object from a plurality of observation points, photogrammetry technology is used to analyze parallax information and obtain dimensions and shapes. Dimensional information on the width or length of the crack can be obtained by executing the measurement program used, the measurement program using AR (Augmented Reality), or the like.

The information acquired by the measurement result information acquiring means 11a includes, in addition to the dimensional information of the width or length of the crack, when estimating the empirical maximum interstory drift angle, the , information for selecting which one to use (width or length selection information). In addition, location information for the measured crack opening is also included.
In addition, information that identifies the building where the measurement was performed (address, owner information, etc.), structural information of the building (total number of floors, type of construction method, etc.), information that identifies the measurement location (measured floor, measurement position/orientation of the measured wall in the building, measured shape/dimension of the wall) may be included.

The control unit 11 also functions as an empirical maximum story drift angle estimating means 11b, and estimates an empirical maximum story drift angle from the dimensional information of the crack width or length acquired by the measurement result information acquisition means 11a. At that time, the estimation formula data 12a stored in the storage unit 12 is used.
The contents of the estimation formula data 12a are the above formulas (1) to (4), and the width or length selection information included in the information acquired by the measurement result information acquisition means 11a and the position relative to the opening Equations (1)-(4) are automatically selected based on the information.
That is, when the width of the crack generated in the upper corner of the opening is the crack width, formula (1) is selected, and the measured crack width dimension information is applied to "Bu" in formula (1). .
Equation (2) is selected when it is the width of a crack formed in the lower corner of the opening, and the measured crack width dimension information is applied to "Bd" in Equation (2).
Equation (3) is selected if it is the crack length that occurs at the upper corner of the opening, and the measured crack length dimension information is applied to "Lu" in Equation (3).
Equation (4) is selected if it is the crack length that occurs at the bottom corner of the opening, and the measured crack length dimension information is applied to "Ld" in Equation (4).
It is assumed that the dimensional information of the crack width or length is input in units of millimeters (mm).

The control unit 11 also functions as the degree of damage determination means 11c, and determines the degree of damage from the experienced maximum story drift angle estimated by the experience maximum story drift angle estimation means 11b. At that time, the damage degree determination data 12b stored in the storage unit 12 is used.
The contents of the damage degree determination data 12b are shown in FIG. are divided.
That is, when the value of the empirical maximum story drift angle is 1/120 rad or less, the degree of damage is determined to be "slight".
When the value of the empirical maximum story drift angle is 1/60 rad or less, the degree of damage is judged to be "minor damage".
When the value of the empirical maximum story drift angle is 1/45 rad or less, the degree of damage is judged to be "moderate damage".
If the value of the empirical maximum story drift angle is 1/20 rad or less, the degree of damage is determined to be "severe damage".
When the value of the empirical maximum story drift angle exceeds 1/20 rad, the degree of damage is determined as "collapse".
Further, each of these categories has a correlation with the seismic intensity class, and is used to determine the necessity of restoration of the foundation structure and superstructure of the building.

In addition, the control unit 11 functions as a seismic performance residual rate determination means 11d, and uses the experienced maximum story drift angle estimated by the experienced maximum story drift angle estimation means 11b as the seismic performance survival rate R (post-disaster seismic performance ratio to seismic performance). At that time, data 12c for determination of seismic performance remaining rate stored in the storage unit 12 is used.
The contents of the data 12c for judging the residual rate of seismic performance are shown in FIG. 13, and are divided into 6 stages corresponding to the value of the empirical maximum story drift angle.
That is, when the value of the empirical maximum story drift angle is less than 1/120 rad, it is determined that the seismic performance residual rate R is "80%".
When the value of the empirical maximum interstory drift angle is 1/120 rad or more and less than 1/60 rad, it is determined that the seismic performance residual rate R is "60%".
When the value of the empirical maximum interstory drift angle is 1/60 rad or more and less than 1/45 rad, it is determined that the seismic performance residual rate R is "50%".
When the value of the empirical maximum interstory drift angle is 1/45 rad or more and less than 1/30 rad, it is determined that the seismic performance residual rate R is "35%".
When the value of the empirical maximum interstory drift angle is 1/30 rad or more and less than 1/20 rad, it is determined that the seismic performance residual rate R is "15%".
Then, when the value of the empirical maximum story drift angle is 1/20 rad or more, it is determined that the seismic performance residual rate R is "5%".
Such a seismic performance residual rate R is important for appropriately repairing/reinforcing damaged buildings, and is also required to satisfy the seismic performance targets of buildings to be reinforced. Moreover, the seismic performance remaining rate R to be obtained is not an absolute value, but a relative value when the value before the disaster is taken as 100%.

As the arithmetic processing unit 10 in the present embodiment configured as described above, a laptop personal computer (a so-called notebook computer) owned by each investigator who goes to the site after the earthquake and investigates the building is assumed. there is However, it is not limited to this, and a mobile phone such as a smart phone may be used, or another computer may be used.
When a mobile phone such as a smart phone is used as the arithmetic processing unit 10, an investigator can conduct an on-site investigation and immediately estimate the experienced maximum story drift angle, determine the degree of damage, and determine the remaining rate of seismic performance. It is convenient because it can be done.

Further, the arithmetic processing unit 10 may not be owned by each investigator, but may be a server or the like managed by, for example, an administrative agency, a housing manufacturer, a research company, or the like. In this case, the investigator should have at least a communication terminal capable of transmitting various information including crack width and length dimension information to the processing unit 10, which is a server.
More specifically, an investigator enters the site with a mobile phone such as a smartphone with a built-in camera 16, takes a picture of the crack at the site, and sends the data to the processing unit 10, which is a server. send. Then, the estimation result of the experienced maximum story drift angle and the determination result of the degree of damage and the residual rate of seismic performance derived by the server are received by a mobile phone such as a smart phone. Even in such a form, it is possible to estimate the empirical maximum story drift angle.
Note that when the arithmetic processing unit 10 is used as a server, it is preferable to store the received information in a database form. For example, if various information is linked to information sent from the site and stored, it becomes possible not only to estimate the empirical maximum story drift angle, but also to analyze the earthquake itself.

FIG. 14 shows a flow chart for explaining a method for estimating an experienced maximum story drift angle, a method for determining a degree of damage, and a method for determining a rate of remaining seismic performance.
First, an investigator visually finds walls 2 and 3 with cracks f1 to f6 in the wall cloth in the building 1 damaged by the earthquake, and selects the largest crack among them (step S1). In this embodiment, it is assumed that the crack f1 in the wall 2 is selected.

Subsequently, the investigator measures the width or length of the crack f1 (step S2). A crack scale may be used, or the camera 16 may be used to measure the dimensions.
After measuring the crack f1, the investigator inputs measurement result information to the processor 10 (step S3). The measurement result information may be input from the input unit 14, or may be performed by connecting the camera 16 to the arithmetic processing unit 10 or by transmitting data.

The arithmetic processing unit 10 acquires the measurement result information including the dimension information of the width or length of the crack f1 by the measurement result information acquiring means 11a (step S4).
Then, the arithmetic processing unit 10 uses the empirical maximum story drift angle estimating means 11b to estimate the empirical maximum story drift angle from the crack width or length dimension information acquired by the measurement result information acquisition means 11a (step S5).

Further, the arithmetic processing unit 10 determines the degree of damage from the experienced maximum story drift angle estimated by the experience maximum story drift angle estimation device 11b by the disaster degree determination means 11c (step S6).
Further, the arithmetic processing unit 10 uses the seismic performance residual rate determining means 11d to determine the seismic performance remaining rate R from the experienced maximum story drift angle estimated by the experienced maximum story drift angle estimation means 11b (step S7).
Note that the order of steps S6 and S7 may be reversed.

Subsequently, the arithmetic processing unit 10 outputs the estimation result by the experienced maximum story drift angle estimating means 11b, and the determination results by the damage level determining means 11c and the seismic performance residual ratio determining means 11d (step S8). The output destination may be the display unit 13 of the arithmetic processing unit 10, or may be transmitted to a computer owned by the researcher (for example, a smart phone, a tablet computer, etc.).

After that, the investigator acquires the estimation result by the experienced maximum story drift angle estimating means 11b and the judgment result by the damage degree judging means 11c and the seismic capacity residual rate judging means 11d by his own computer (step S9).
As described above, it is possible to estimate the experienced maximum story drift angle, determine the degree of damage, and determine the seismic performance residual rate R of the building 1 damaged by an earthquake.

According to the present embodiment, the empirical maximum interlaminar deformation angle and cracks occurring in wall crosses are quantified based on the results of experiments conducted in advance. From the actual width or length of cracks f1 to f6 in the wall cross that occurred in the above, simply and accurately estimate the empirical maximum inter-story drift angle using the estimation formulas (1) to (4) based on the results of experiments conducted in advance. Therefore, there is no individual difference in estimation results.

After a major earthquake occurs, it is necessary to quickly determine the degree of damage and the residual rate of seismic performance of the building 1 in order to ensure the safety of residents and local residents. In the event of a Nankai Trough megathrust earthquake or an earthquake directly beneath the Tokyo metropolitan area, which is expected to occur in the future, it is predicted that there will be an overwhelming shortage of survey personnel. ing.
As a result, it is less likely that a large Nankai Trough earthquake or an earthquake directly beneath the Tokyo metropolitan area, which is expected to occur in the future, will cause a shortage of investigative personnel, making it easier to respond quickly.

Also, when estimating the empirical maximum story drift angle, it is estimated based on the above estimation formulas (1) to (4). As a result, the experienced maximum story drift angle can be estimated from the width or length of the cracks f1 to f6 according to the positions of the cracks f1 to f6 with respect to the openings 2a and 3a. can improve accuracy in performing

Moreover, since the degree of damage to the building 1 is determined based on the estimated empirical maximum story drift angle, the degree of damage to the residents of the building 1 can be notified.

Further, since the seismic performance remaining rate R of the building 1 is determined based on the estimated empirical maximum story drift angle, the residents of the building 1 can be notified of the seismic performance remaining rate R.

In addition, the arithmetic processing unit 10 acquires measurement result information related to the width or length of the cracks f1 to f6 measured in advance, and based on this, it is possible to estimate the empirical maximum story drift angle. As long as the width and length are measured in advance, the arithmetic processing unit 10 can easily estimate the empirical maximum inter-story drift angle.

Further, since the arithmetic processing unit 10 can use the images of the cracks f1 to f6 photographed by the camera 16 as measurement result information, it is possible to easily measure the crack width and length. Therefore, it is possible to improve the simplicity of estimating the empirical maximum story drift angle.

In addition, according to the results of experiments conducted in advance, the empirical maximum interlaminar deformation angle and the cracks f1 to f6 occurring in the wall cross were quantified. From the actual width or length of cracks f1 to f6 in the wall cloth, it is possible to easily and accurately estimate the empirical maximum story drift angle by an estimation formula based on the results of experiments conducted in advance. does not occur.

1 Building 1a First floor 1b Second floor 2 Wall 2a Opening 3 Wall 3a Opening 10 Arithmetic processing unit 11 Control unit 11a Measurement result information acquisition means 11b Experienced maximum inter-story drift angle estimation means 11c Damage degree determination means 11d Seismic performance residual rate determination means 12 Storage unit 12a Estimation formula data 12b Damage degree determination data 12c Seismic performance residual rate determination data 13 Display unit 14 Input unit 15 Communication unit 16 Cameras f1 to f6 Cracks

Claims (7)

In a building wall having a gypsum board on at least one surface and a wall cloth attached to the surface of the gypsum board, cracks in the wall cloth occur at the corners of the opening formed in the wall. A method of estimating an empirical maximum interstory drift angle from
measuring the width or length of the crack,
A method for estimating an empirical maximum story drift angle, wherein the empirical maximum story drift angle is estimated from the crack measurement results using an estimation formula based on the results of experiments performed in advance. In the method for estimating the empirical maximum story drift angle according to claim 1,
The estimated formula is
γe=(Bu+0.26)/110 Expression (1)
γe=(Bd+0.66)/180 Expression (2)
γe=(Lu+43.6)/25200 Expression (3)
γe=(Ld+163.5)/55100 Expression (4)
is either
γe: maximum interlaminar deformation angle (rad), Bu: crack width (mm) generated at the upper corner of the opening, Bd: crack width (mm) generated at the lower corner of the opening , Lu: crack length (mm) generated in the upper corner of the opening, Ld: crack length (mm) generated in the lower corner of the opening Estimation method for maximum story drift angle. In the method for estimating the empirical maximum story drift angle according to claim 1 or 2,
A method for estimating an experienced maximum story drift angle, comprising determining a degree of damage to the building based on the estimated experience maximum story drift angle. In the method for estimating the empirical maximum interlayer drift angle according to any one of claims 1 to 3,
A method for estimating an experienced maximum story drift angle, comprising determining a seismic performance remaining rate of the building based on the estimated experience maximum story drift angle. In the method for estimating the empirical maximum interstory drift angle according to any one of claims 1 to 4,
Estimation of the empirical maximum story drift angle is performed by an arithmetic processing unit,
A method for estimating an empirical maximum interstory drift angle, wherein the arithmetic processing unit acquires measurement result information relating to the width or length of the crack measured in advance. In the method for estimating the empirical maximum story drift angle according to claim 5,
A method for estimating an empirical maximum story drift angle, wherein the crack is photographed by a camera, and the arithmetic processing unit acquires an image of the crack photographed by the camera as the measurement result information. A computer having a storage device that stores an estimation formula based on experimental results that have been performed in advance,
In a building wall having a gypsum board on at least one surface and a wall cloth attached to the surface of the gypsum board, cracks in the wall cloth occur at the corners of the opening formed in the wall. Measurement result information acquisition means for acquiring measurement result information related to the width or length of
A program that executes the estimation formula and functions as estimation means for estimating the empirical maximum story drift angle from the crack measurement results acquired by the measurement result information acquisition means.

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