JP2023129966A - Displacement measurement device and damage degree evaluation system - Google Patents

Abstract

To provide a displacement measurement device that can measure the amount of displacement of each story of a multi-story building after an earthquake without time deviation, and a damage degree evaluation system that can accurately evaluate the presence or absence of damage to the building and the degree of the damage by using the displacement measurement device.SOLUTION: A displacement measurement device 50 measures displacement of a multi-story building B after an earthquake, and the device has: a plurality of marks 30 that are provided at different heights on an outer wall W of the building B; a support member 20 that overhangs outdoors from the rooftop B1 or the roof of the building B; and an imaging device 10 that is attached to the support member 20 and simultaneously picks up images of the plurality of marks 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to a displacement measuring device and a damage evaluation system.

In evaluating the degree of damage (or degree of damage) to a building during an earthquake, the measured displacement of the building (the displacement of each floor) and the interstory deformation angle calculated based on this displacement are used. An example of a technique for measuring the amount of displacement of a multi-story building during an earthquake and evaluating the health of the building based on the measured amount of displacement is proposed in Patent Document 1.

The building health evaluation system proposed in Patent Document 1 fixes a camera to the ceiling of each floor of a multi-story building, and images an area including a sign fixed to the floor of each floor with the camera on each floor. This is a system that sends images captured by each camera to a server via a network. The server analyzes the acquired image to determine the three-dimensional position and shape of the sign with a known shape included in the image, and calculates the displacement of each floor during an earthquake based on the determined three-dimensional position and shape of the sign. The amount of displacement is specified, and the interstory deformation angle calculated based on the amount of displacement is used to evaluate the health of the building during an earthquake.

Japanese Patent Application Publication No. 2018-189578

According to the building health evaluation system described in Patent Document 1, the amount of displacement of the building can be directly determined instead of indirectly determining the amount of displacement of the building by numerical integration as in the case of using an acceleration sensor. There is.

However, this system identifies the displacement of each floor during an earthquake based on images sent from a camera unique to each floor, and calculates the interstory deformation angle based on the identified displacement of each floor. If the time synchronization of each camera is not performed, it is not possible to specify the amount of displacement on each floor at the same time during an earthquake. For example, even if the interstory deformation angle of a building is calculated based on the amount of displacement of each floor at different times, generally the displacement amount and interstory deformation angle of each floor will not be used to evaluate the degree of damage to the building.

The present invention has been made in view of the above-mentioned problems, and includes a displacement measuring device that can measure the amount of displacement of each floor of a multi-story building during an earthquake without time lag, and a displacement measuring device that can measure the displacement of a building with no time lag. The purpose of the present invention is to provide a damage evaluation system that can accurately evaluate the presence or absence of damage and the degree of damage.

In order to achieve the above object, one aspect of the displacement measuring device according to the present invention is as follows:
A displacement measuring device that measures the displacement of a multi-story building during an earthquake,
a plurality of gauge points provided at different heights on the outer wall of the building;
a support member protruding outdoors from the roof or the roof of the building;
The present invention is characterized by comprising an imaging device attached to the support member and configured to simultaneously capture images of a plurality of the reference points.

According to this aspect, the imaging device is attached to the roof of the building or to the support member extending outdoors from the roof, and the imaging device simultaneously images a plurality of gauge points provided at different heights on the outer wall of the building. By doing so, it is possible to image the displacement amounts of a plurality of gauge points without time lag. Furthermore, since a plurality of gauge points are imaged with one imaging device, for example, the manufacturing cost of the device can be reduced compared to the case where a plurality of imaging devices are used. Here, when capturing images of a plurality of gauge points on a plurality of outer walls that constitute a building, it is desirable to apply a unique imaging device to each outer wall.

Further, other aspects of the displacement measuring device according to the present invention include:
The support member is characterized in that it has such rigidity that relative displacement with respect to the installation position in the building does not occur during an earthquake.

According to this aspect, the support member has such rigidity that no relative displacement occurs between the building and the installation position in the building during an earthquake. It is possible to suppress a decrease in the accuracy of the measured value regarding the amount of displacement.

Further, other aspects of the displacement measuring device according to the present invention include:
The imaging device is characterized in that it is capable of freely detecting a distance to a gauge point.

According to this aspect, since the imaging device can freely detect the distance to the gauge point, the displacement amount of the gauge point can be directly specified by the imaging device. For example, in a conventional method for identifying the amount of displacement of a building, the amount of displacement of a building is indirectly determined by second-order integration of the acceleration waveform measured by a seismometer. This makes it possible to directly specify the amount of displacement of a gauge point provided on the outer wall of a building, improving the characteristic accuracy of the amount of displacement, and significantly shortening the time required to specify the amount of displacement.

Further, in another aspect of the displacement measuring device according to the present invention,
The gauge point is a part of the outer wall.

According to this aspect, since the gauge is a part of the outer wall, there is no need to apply a special member to the gauge, and there is no need to install the gauge on the outer wall, so the displacement measuring device The formation cost can be reduced. Here, the "part of the outer wall" includes, for example, horizontal joints between floors or in the vicinity thereof, ventilation members protruding from the outer wall, windows provided in the outer wall, and the like.

Further, other aspects of the displacement measuring device according to the present invention include:
It is characterized in that the gage points are provided between floors of each floor or at preset positions.

According to this aspect, the three-dimensional coordinates of the gauge points during normal times can be specified with high accuracy because the gauge points are provided between floors of each floor or at preset positions. In addition, for example, if gauge points are provided between each floor, the height of each floor is known, so the difference between the displacement of each floor measured (identified) at the time of an earthquake and the height of each floor can be used to calculate the difference between the floors. This is preferable because the deformation angle can be calculated in a short time.

Further, other aspects of the displacement measuring device according to the present invention include:
The present invention is characterized in that the interstory deformation angle of the building is identified from the amount of displacement of the detected distance to the gauge points by imaging the plurality of gauge points by the imaging device.

According to this aspect, for example, one imaging device specifies the displacement amount of the detected distance to a plurality of gauge points at the same time, and the interstory deformation of the building is determined based on the displacement amount (interstory displacement amount) of each gauge point. By detecting the angle, the angle of deformation between the floors of the building can be determined with high precision using only the displacement measuring device.

Further, one aspect of the damage evaluation system according to the present invention is as follows:
The displacement measuring device;
an evaluation device that acquires imaging data from the imaging device and evaluates the degree of damage to the building;
The evaluation device includes:
a storage unit that stores at least the normal time coordinates of the gauge point and a threshold value regarding the interstory deformation angle of the building;
From the imaging data of the plurality of gage points, identify the seismic coordinates of each gage point when the building is displaced during an earthquake, and calculate the amount of displacement of each gage point during the earthquake from the normal coordinates and the seismic coordinates. or a calculation unit that calculates the amount of displacement during an earthquake from the seismic coordinates of the imaging device and each gauge point, and calculates the amount of interstory displacement and the interstory deformation angle from the amount of displacement of each gauge point;
The present invention is characterized by comprising an evaluation unit that compares the interstory deformation angle with the threshold value to evaluate the degree of damage to the building.

According to this aspect, the displacement amount of each gauge during an earthquake is calculated from the seismic coordinates of a plurality of gauges measured simultaneously and the normal coordinates of each gauge, or the imaging device and each gauge The degree of damage to the building is calculated based on the interstory deformation angle calculated by calculating the amount of displacement during the earthquake from the earthquake coordinates of Through this evaluation, highly accurate damage evaluation can be achieved in as short a time as possible. For example, if the imaging device is equipped with equipment that can acquire its own three-dimensional coordinate data, it can acquire its own three-dimensional coordinate data at the time of an earthquake, and use the imaging data of each gauge point to determine the location of each gauge point at the time of the earthquake. By calculating the difference between the three-dimensional coordinate data of each gauge point during normal times and during an earthquake, the amount of displacement of each gauge point during an earthquake can be determined, and the displacement of each gauge point can be determined. The amount of interstory displacement on each floor can be calculated by finding the difference value of the amount. On the other hand, if the imaging device is not equipped with a device that can acquire its own three-dimensional coordinate data, it can calculate the relative distance between each gauge based on the imaging data of each gauge at the time of the earthquake. It is possible to calculate the amount of interstory displacement on each floor during an earthquake.

Further, in another aspect of the damage evaluation system according to the present invention,
A seismograph is installed in the building, thresholds for seismic waveforms and other waveforms are set on the seismograph,
The imaging device is characterized in that the power is turned on when the waveform measured by the seismometer reaches the threshold.

According to this aspect, the power of the imaging device is turned on when the waveform measured by the seismograph reaches a threshold for identifying an earthquake waveform, so that the power of the imaging device is turned on only during an earthquake. Since it can be turned on, running costs, typified by electricity consumption, can be reduced. Here, the imaging device and the seismograph are connected to be able to transmit and receive signals either wirelessly or by wire, and the seismograph transmits a power ON signal to the imaging device.

Further, in another aspect of the damage evaluation system according to the present invention,
The evaluation device further includes a communication section,
The imaging data transmitted from the imaging device via a network is received by the communication unit.

According to this aspect, the imaging data transmitted from the imaging device via the network is received by the communication unit of the evaluation device, and the control room of the building (building, condominium, etc.) in which the displacement measurement device is installed. In addition to cases where evaluation equipment is installed in buildings such as buildings, evaluation equipment is installed in the management offices of management companies that manage or maintain the buildings, or in the management offices of construction companies that constructed buildings, etc. When an imaging device and an evaluation device are located apart from each other can be connected so as to be able to transmit and receive data.

As can be understood from the above explanation, according to the displacement measuring device and damage evaluation system of the present invention, the amount of displacement of each floor during an earthquake of a multi-story building can be measured without time lag, and the damage level of the building can be measured. It is possible to accurately evaluate the presence or absence of damage and the degree of damage.

1 is a diagram showing the overall configuration of an example of a displacement measuring device and a damage evaluation system according to an embodiment. FIG. 2 is a view taken in the direction of arrow II in FIG. 1 and shows an example of a plurality of gauge points provided on the outer wall of a building. FIG. 2 is a view taken in the direction of arrow II in FIG. 1 and shows another example of a plurality of gauge points provided on the outer wall of a building. FIG. 2 is a diagram showing an example of a hardware configuration of an evaluation device. It is a figure showing an example of the functional composition of an evaluation device. It is a diagram showing the coordinates of each gauge point during normal times and during earthquakes, together with the amount of displacement during earthquakes. FIG. 7 is a diagram illustrating another example of how an imaging device is installed in a building.

Hereinafter, an example of a displacement measuring device and a damage evaluation system according to an embodiment will be described with reference to the accompanying drawings. Note that in this specification and the drawings, substantially the same constituent elements may be given the same reference numerals to omit redundant explanation.

[Displacement measuring device and damage evaluation system according to embodiment]
An example of a displacement measuring device and a damage evaluation system according to an embodiment will be described with reference to FIGS. 1 to 6.

The displacement measuring device 50 is a device that measures the displacement of a building B having multiple floors (the illustrated example is the seventh floor) during an earthquake. The displacement measuring device 50 measures a plurality of (seven in the illustrated example) gauge points 30 provided at different heights on the outer wall W of the building B, and a support member 20 extending outdoors from the rooftop B1 of the building B. , and an imaging device 10 that is attached to the support member 20 and captures images of a plurality of gauge points 30 at the same time. Here, the support member may extend from the roof of the building, or any form may be used as long as the imaging device can simultaneously image at least a plurality of gauge points provided on the outer wall of the building.

The support member 20 has high rigidity in both the fixed part fixed to the rooftop B1 and the main body of the support member, so that when the building B vibrates during an earthquake, the support member 20 that supports the imaging device 10 is able to absorb the vibrations of the building B. It has a strong structure that does not cause different vibrations (it vibrates in the same way as building B).

In the illustrated example, a thick base plate 22 is fixed to a rooftop B1 made of reinforced concrete, for example, via a plurality of anchor bolts 23, and the legs of a support frame 21, which is L-shaped in side view, are welded to the base plate 22.

The legs of the support frame 21 and the base plate 22 are further fixed to each other by a plurality of reinforcing ribs 24.

The support frame 21 is formed of a highly rigid steel member such as a square steel pipe, a steel pipe, or an H-shaped steel, and the L-shaped bent portion of the support frame 21 is reinforced with a chin rest 25 made of a shaped steel or the like. . Here, although not shown, one end of the cable is fixed to the L-shaped bent part of the support frame 21, and the other end of the cable is fixed to another area of the rooftop B1, so that the support frame is in a cantilevered position. The stability of 21 may be enhanced. Note that there are various types of high-rigidity support members other than the illustrated example.

An imaging device 10 is fixed to the tip of the support frame 21 via an angle adjustment mechanism (not shown), and the imaging device 10 is adjusted to an angle that allows the imaging device 10 to image the entire plurality of gauge points 30 provided on the outer wall W. has been done.

Various devices capable of acquiring coordinate data (for example, three-dimensional coordinate data) of gauge points can be applied to the imaging device 10, such as a 3D camera and a 3D scanner (LRF (Laser Range Finder)). Further, a strobe may be attached to the imaging device 10 so that the imaging device 10 can clearly image each gauge point 30 even at night. It may be equipped with lighting equipment (not shown) that can clearly image the image.

As shown in FIG. 2A, the plurality of gauge points 30 are provided at a plurality of positions on the outer wall W at intervals in the height direction. In the illustrated example, a plurality of gage points 30 are installed on an imaginary straight line (dotted chain line) that vertically traverses the horizontal joint m between floors of each floor. The reference point 30 may be a mark member made of a luminescent material that can be clearly imaged by the imaging device 10 even at night. , screws, etc.).

Further, as in the example shown in FIG. 2B, the gauge point 30A may be set on a virtual straight line (dotted chain line) that vertically traverses the horizontal joint m between floors of each floor. In this case, the work of attaching gauge points to the outer wall W becomes unnecessary, which leads to a reduction in the cost of forming the displacement measuring device 50. Here, markings serving as gauge points 30A may be attached to each point on the vertical line of the horizontal joint m between each floor.

Returning to FIG. 1, a seismograph 60 is installed in the building B, and the seismograph 60 and the imaging device 10 are connected by wire or wirelessly.

The seismograph 60 has thresholds set for seismic waveforms caused by seismic motion E propagating within the ground G and other waveforms caused by traffic vibrations and the like. The imaging device 10 receives a power ON signal from the seismograph 60 when the waveform measured by the seismograph 60 reaches a threshold value, and the power of the imaging device 10 is turned on.

With this configuration, the power of the imaging device 10 is turned off during normal times, and when the seismic motion E propagates to the building B, the power of the imaging device 10 is automatically turned on, which reduces the amount of electricity used by the imaging device 10. Typical running costs can be suppressed.

The damage evaluation system 100 includes a displacement measuring device 50 and an evaluation device 80 located at a management company M located away from a building B to be evaluated for damage. Here, in addition to the illustrated example, the evaluation device 80 may be installed in a management room in building B that is subject to damage evaluation, or in a management department such as the main branch of the construction company that constructed building B. The server device may be installed in the server or may be a server device located on the cloud.

The coordinate data of each gauge point 30 at the time of the earthquake measured by the imaging device 10 is transmitted to the evaluation device 80 via the network 70. For example, the three-dimensional coordinates of the imaging device 10 such as a 3D camera supported by the support member 20 are specified in advance based on survey reference points around the building B, so that the three-dimensional coordinates and the imaging device 10 are The three-dimensional coordinates of each gauge point 30 are specified by the measured values (coordinate data) of each gauge point 30 by the device 10. Alternatively, the imaging device 10 may be equipped with a GPS (Global Positioning System) or the like and obtain its own three-dimensional coordinate data using the GPS or the like.

The evaluation device 80 specifies the amount of displacement of each gage 30 from normal times based on the received coordinate data of each gage 30 during the earthquake, and specifies the interstory deformation angle of each floor from the amount of displacement and the floor height. In other words, as shown in Figures 2A and 2B, since each gauge point 30, 30A is provided between each floor, the vertical distance between each gauge point becomes the floor height of each floor, so it was specified. By calculating the difference value (interstory displacement amount) between the displacement amounts of each gauge point 30 and 30A and dividing the interstory displacement amount by the floor height, the interstory deformation angle of each floor can be specified in a short time.

The network 70 includes a public network such as the Internet, a wireless network such as a mobile phone network, a dedicated network such as a VPN (Virtual Private Network), a LAN (Local Area Network), and the like.

As described above, the damage evaluation system 100 is a system in which the displacement measuring device 50 and the evaluation device 80 are connected via the network 70. For example, an administrator etc. The data may be directly acquired from the imaging device 10 and input into the evaluation device 80.

Next, an example of the hardware configuration of the evaluation device 80 will be described with reference to FIG. 3, and an example of the functional configuration of the evaluation device 80 will be described with reference to FIG.

As shown in FIG. 3, the evaluation device 80 is configured by an information processing device (computer) such as a personal computer (PC).

The computer constituting the evaluation device 80 includes a CPU (Central Processing Unit) 81, a main storage device 82, an auxiliary storage device 83, a communication IF (interface) 84, and an input/output IF 84, which are interconnected by a connection bus 86. ing. The main storage device 82 and the auxiliary storage device 83 are computer-readable recording media. Note that the above components may be provided individually, or some components may not be provided.

The CPU 81 is also called an MPU (Microprocessor) or a processor, and the CPU 81 may be a single processor or a multiprocessor. The CPU 81 is a central processing unit that controls the entire evaluation device 80 consisting of a computer. The CPU 81, for example, develops a program stored in the auxiliary storage device 83 in an executable manner in the work area of the main storage device 82, and controls peripheral devices through the execution of the program, thereby executing functions that meet a predetermined purpose. I will provide a.

The main storage device 82 stores computer programs executed by the CPU 81, data processed by the CPU 81, and the like. The main storage device 82 includes, for example, flash memory, RAM (Random Access Memory), and ROM (Read Only Memory). The auxiliary storage device 83 stores various programs and various data on a recording medium in a readable and writable manner, and is also called an external storage device. The auxiliary storage device 83 stores, for example, an OS (Operating System), various programs, various tables, and the like. The OS includes, for example, a communication interface program that exchanges data with an external device connected via the communication IF 84. External devices for the evaluation device 80 include the imaging device 10 and the like.

The auxiliary storage device 83 is used, for example, as a storage area to supplement the main storage device 82, and stores computer programs executed by the CPU 81, data processed by the CPU 81, and the like. The auxiliary storage device 83 is a silicon disk including a nonvolatile semiconductor memory (flash memory, EPROM (Erasable Programmable ROM)), a hard disk drive (HDD) device, a solid state drive device, or the like. Further, as the auxiliary storage device 83, a drive device for a removable recording medium such as a CD drive device, a DVD drive device, and a BD drive device is exemplified. ) memory, SD (Secure Digital) memory card, etc.

The input/output IF 85 is an interface that inputs and outputs data to and from devices connected to the evaluation device 80. For example, a keyboard, a pointing device such as a touch panel or a mouse, an input device such as a microphone, etc. are connected to the input/output IF 85. The evaluation device 80 receives operation instructions and the like from an operator who operates an input device via the input/output IF 85.

Further, the input/output IF 85 is connected to, for example, a display device such as a liquid crystal display (LCD) or an organic EL panel (electroluminescence), an output device such as a printer, or a speaker. The evaluation device 80 displays, for example, the amount of displacement of each gauge point 30 of building B during an earthquake, and the interstory deformation angle of each floor calculated based on this amount of displacement.

The communication IF 84 is an interface with the network 70 to which the evaluation device 80 connects. The communication IF 84 receives measurement data from the imaging device 10 via various networks 70 including the above-mentioned public network such as the Internet.

As shown in FIG. 4, the evaluation device 80 provides various functions of at least a communication section 802, a calculation section 804, an evaluation section 806, a display section 808, and a storage section 810 by executing a program by a CPU 81. Here, at least a part of the processing function may be provided by a DSP (Digital Signal Processor), a GPU (Graphics Processing Unit), etc. Similarly, at least a part of the processing function may be provided by an FPGA (Field-Programmable Unit). It may also be a dedicated LSI (large scale integration) such as a gate array), a numerical calculation processor, an image processing processor, or other digital circuits.

The communication unit 802 receives imaging data (coordinate data) of a plurality of gauge points 30 that are simultaneously imaged by the imaging device 10 and transmitted from the imaging device 10.

The storage unit 810 stores (memorizes) the peacetime coordinates of each gauge point 30 in peacetime. Here, Figure 5 is a diagram showing the coordinates of each gauge point during normal times and during an earthquake, together with the amount of displacement during an earthquake. Building B during normal times is shown by a dashed line, and the displacement due to the horizontal force H acting during an earthquake is shown in Figure 5. Building B, which is currently in use, is shown by a solid line.

For example, from the normal time coordinate data P0 (x0, y0, z0) of the imaging device 10 during normal times, and the normal time coordinate data (x2, y2, z7) of the gauge point 30a installed on the top floor, The peacetime coordinate data of each of the gauge points 30a to 30g up to the peacetime coordinate data (x2, y2, z1) of the gauge point 30g is stored in the storage unit 810.

If the imaging device 10 is equipped with a GPS or the like, the earthquake coordinate data P1 (x1, y1, z1) of the imaging device 10 when the building B is horizontally displaced during an earthquake can be instantly specified.

Based on the earthquake coordinate data (x1, y1, z1) of the imaging device 10 and the imaging data of each gauge point 30a to 30g by the imaging device 10, the earthquake coordinates of each gauge point 30a to 30g at the time of an earthquake (for example, the landmark The earthquake coordinate data (x3, y2, z7) of the point 30a and the earthquake coordinate data (x9, y2, z1) of the gauge point 30g are specified.

During an earthquake, a horizontal force H acts on building B, for example, alternately in the left and right directions, and building B is repeatedly horizontally displaced in the left and right directions. Therefore, we carried out continuous imaging of each gauge point 30a to 30g by the imaging device 10 and continuous acquisition of seismic coordinate data based on this continuous imaging. Time coordinate data is stored in the storage unit 810.

Since each gauge point 30a to 30g is imaged simultaneously by the common imaging device 10, the combination of seismic coordinate data of each gauge point 30a to 30g at the same time is stored in the storage unit for the number of times of imaging (for different imaging times). 810.

The calculation unit 804 calculates the difference between the three-dimensional coordinate data of each gauge point 30a to 30g during normal times and during an earthquake, and specifies the amount of displacement. As shown in FIG. 5, each of the gauge points 30a to 30g is displaced by δ1 to δ7 with respect to the direction of action of the horizontal force H, respectively. Here, the displacement amount of the gauge point 30a: δ1 is obtained from the difference value S1 between the three-dimensional coordinate data during normal times and during an earthquake, and the difference (S1-J) between the horizontal displacement amount of the ground G and the other gauge points. The displacement amounts of 30b to 30g: δ2 to δ7 are also calculated by the same method (for example, the displacement amount of gauge point 30b: δ2=S2−J).

Since the storage unit 810 stores combinations of seismic coordinate data for each of the gauge points 30a to 30g at the same time for the number of imaging times, the amount of displacement of each gauge point 30a to 30g at each imaging time is calculated. Ru.

The calculation unit 804 performs a calculation to divide the interstory displacement amount, which is the difference value of the displacement amount of each gauge point 30a to 30g (for example, δ1-δ2, δ2-δ3, etc.), by the floor height, and calculates the interstory deformation angle of each floor. Calculate.

Since the interstory deformation angle on each floor can reach its maximum at different times, the maximum interstory deformation angle on each floor is extracted for each floor from among the interstory deformation angles on each floor at multiple times calculated according to the number of imaging times. do.

Here, if the imaging device 10 is not equipped with a GPS or the like, the imaging device 10 installed in the building B via the rigid support member 20 may be displaced in the same manner in synchronization with the building B. From the image data (earthquake coordinate data) of each of the gauge points 30a to 30g captured at the same time, for example, each coordinate value in the axial direction (the illustrated example is the x direction) that is displaced by the horizontal force H is acquired ( (This x-coordinate is not an absolute coordinate), the calculation unit 804 can also obtain the interlayer displacement amount similar to the above-mentioned δ1-δ2, δ2-δ3, etc. by calculating the difference value of the x-coordinate of each gauge point.

Furthermore, when the imaging device 10 is not equipped with a GPS or the like, for example, as shown in FIG. 5, a survey reference point Pr (xr1, yr, zr ) may be provided. Based on this survey reference point Pr (xr1, yr, zr), the three-dimensional coordinates of each gauge point 30a to 30g in normal times are measured, and even in the event of an earthquake, the survey reference point Pr is imaged (the three-dimensional coordinates after displacement are By determining the original coordinates Pr (xr2, yr, zr)) and the moving distance of the imaging device 10, the amount of displacement of each gauge point 30a to 30g can be specified.

The storage unit 810 stores a plurality of threshold values regarding the interstory deformation angle of the building B. The threshold values of the plurality of interstory deformation angles are related to the degree of damage (or degree of disaster) of the building B.

For example, the interlayer deformation angle threshold: θ1 = 1/200 can be set as the threshold for small damage and smaller damage, and the interlayer deformation angle threshold: θ2 = 1/100 can be set as the threshold for small damage and medium damage.

The evaluation unit 806 refers to each threshold value of the interstory deformation angle stored in the storage unit 810, compares (the maximum value of) the interstory deformation angle of each floor with each threshold value, and evaluates the degree of damage on each floor of building B. do.

The display unit 808 displays evaluation results regarding (the maximum value of) the interstory deformation angle and degree of damage for each floor.

According to the displacement measurement device 50, the amount of displacement of each floor of the multi-story building B during an earthquake can be measured without time lag. As a result, the damage evaluation system 100 including the displacement measuring device 50 can accurately evaluate the presence or absence of damage to the building B and the degree of damage.

FIG. 6 is a diagram showing another example of how the imaging device is installed in a building. When the building B is a high-rise building or a super high-rise building, the vibration mode of the building B may be deformed in a higher order mode than the second order mode. For example, in the case of the deformation mode shown in FIG. 6, a configuration having only the imaging device 10 corresponding to one outer wall W cannot handle a case where the imaging device 10 cannot simultaneously image all the gauge points 30.

In the example shown in FIG. 6, regarding the left imaging device 10, a plurality of gauge points 30 installed below the outer wall W are outside the imaging possible range, and all gauge points 30 cannot be imaged at the same time.

Therefore, as shown in the illustrated example, a separate imaging device 10 corresponding to the outer wall W on the right side is further mounted on the building B, and in the event of an earthquake, the imaging devices 10 on the left and right (plurality) By configuring the left and right displacement measuring devices 50 to simultaneously image a plurality of gauge points 30, at a time when one imaging device 10 cannot simultaneously image all the gauge points 30, all the markers can be captured by the other imaging device 10. Simultaneous imaging of points 30 can be realized.

Although not shown, in a building that is rectangular in plan view, it is preferable to equip the building with displacement measuring devices 50 corresponding to each of the four outer walls. In addition, for buildings that are circular, oval, or polygonal other than rectangular in plan view, a displacement measuring device 50 that can simultaneously capture images of all gauge points should be installed at an appropriate location in the building in the event of a deformation mode that may occur. It is preferable.

Other embodiments in which other components are combined with the configurations listed in the above embodiments may be used, and the present invention is not limited to the configurations shown here. In this regard, changes can be made without departing from the spirit of the present invention, and can be appropriately determined depending on the application form.

10: Imaging device 20: Support member 21: Support frame 22: Base plate,
23: Anchor bolt 24: Reinforcement rib 25: Cheek support 30, 30A, 30a to 30g: Gauge 50: Displacement measuring device 60: Seismometer 70: Network 80: Evaluation device 100: Damage evaluation system 802: Communication department 804: Calculation Section 806: Evaluation section 808: Display section 810: Storage section G: Ground B: Building B1: Rooftop W: Exterior wall E: Earthquake motion M: Management company m: Side joint H: Horizontal force

Claims (9)

A displacement measuring device that measures the displacement of a multi-story building during an earthquake,
a plurality of gauge points provided at different heights on the outer wall of the building;
a support member protruding outdoors from the roof or the roof of the building;
A displacement measuring device, comprising: an imaging device attached to the support member to simultaneously capture images of a plurality of the reference points. 2. The displacement measuring device according to claim 1, wherein the support member has such rigidity that relative displacement with respect to an installation position in the building does not occur during an earthquake. 3. The displacement measuring device according to claim 1, wherein the imaging device is capable of detecting a distance to a gauge point. The displacement measuring device according to any one of claims 1 to 3, wherein the gauge point is a part of the outer wall. 5. The displacement measuring device according to claim 1, wherein the gauge point is provided between floors or at a preset position. According to any one of claims 1 to 5, the interstory deformation angle of the building is identified from the amount of displacement of a detected distance to the gauge points by imaging the plurality of gauge points by the imaging device. Displacement measuring device described. A displacement measuring device according to any one of claims 1 to 6,
an evaluation device that acquires imaging data from the imaging device and evaluates the degree of damage to the building;
The evaluation device includes:
a storage unit that stores at least the normal time coordinates of the gauge point and a threshold value regarding the interstory deformation angle of the building;
From the imaging data of the plurality of gage points, identify the seismic coordinates of each gage point when the building is displaced during an earthquake, and calculate the amount of displacement of each gage point during the earthquake from the normal coordinates and the seismic coordinates. or a calculation unit that calculates the amount of displacement during an earthquake from the seismic coordinates of the imaging device and each gauge point, and calculates the amount of interstory displacement and the interstory deformation angle from the amount of displacement of each gauge point;
A damage evaluation system comprising: an evaluation unit that compares the interstory deformation angle with the threshold value to evaluate the damage degree of the building. A seismograph is installed in the building, thresholds for seismic waveforms and other waveforms are set on the seismograph,
8. The damage evaluation system according to claim 7, wherein said imaging device is configured to be powered on when a waveform measured by said seismometer reaches said threshold value. The evaluation device further includes a communication section,
The damage evaluation system according to claim 7 or 8, wherein the imaging data transmitted from the imaging device via a network is received by the communication unit.

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