Building health assessment system

Abstract

To provide a system for accurate determination of the structural soundness of a building with a simple configuration.SOLUTION: A structural soundness evaluation system for a building includes: an analysis unit 21 which performs a static incremental analysis in advance using a three-dimensional frame model, calculates an analysis value of the energy absorption amount of each layer 11 and an analysis value of the energy absorption amount of each member including columns and beams at each incremental step which is a stage of increasing the load in the static incremental analysis, and records the analysis values in an analysis result recording unit 27; an earthquake information recording unit 22 which records earthquake information obtained from a sensor 12 installed in a building 10; and an energy absorption estimation unit 23 which calculates the layer shear force and interlayer displacement of each layer 11 based on the earthquake information and the weight of each layer 11 of the building 10, and calculates an estimated energy absorption amount of each layer 11 based on the layer shear force and interlayer displacement.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a soundness evaluation system for diagnosing and evaluating the soundness of a building. [Background technology]

[0002] Various building integrity assessment systems have been proposed that can grasp the structural performance, i.e., integrity, of a building, such as the degree of damage to the building, without directly visually inspecting the building after an earthquake. It is desirable for such building integrity assessment systems to grasp the integrity of buildings with higher accuracy. For example, Patent Document 1 discloses a technology configured to estimate the presence or absence of damage spreading in a judgment layer using a building damage spread detection model that learns the relationship between acceleration data in the observation layer and the presence or absence of damage spreading in the observation layer based on acceleration data obtained from a sensor installed in the observation layer of a multi-story building and damage spread information indicating the presence or absence of damage spreading in the observation layer, and acceleration data acquired by a sensor installed in the judgment layer that is the subject of judgment. Although the configuration disclosed in Patent Document 1 can estimate the presence or absence of damage spreading in the observation floor of the building, it cannot perform a detailed assessment of the soundness of each component that constitutes each floor of the building. Therefore, there is a limit to how much accuracy can be improved in assessing the soundness.

[0003] In response to this, Patent Document 2 discloses a configuration in which vibration sensors are installed at the joints of multiple structural members that form the structural frame of a structure, the joints and the multiple structural members that make up the joints are divided into substructures, and the detection information of the vibration sensors installed on each structural member joined to the joints is input and the vibration sensors at the joints are used as output to detect the presence or absence of damage and the extent of damage to the structural members that make up the substructure based on the input / output relationship of the dynamic characteristics of each substructure. In the configuration disclosed in Patent Document 2, detailed soundness can be determined for each structural member, but it is necessary to install a vibration sensor at each joint of the structural members. This requires the installation of many vibration sensors, which makes the configuration complicated and therefore difficult to realize.

[0004] Patent Document 3 also discloses a system that includes multiple sensors installed at multiple positions on a building, and measures the impact of an earthquake on the building at each position based on the impact of the earthquake on the building from before the main motion reaches the building to after it reaches the building, as measured by the multiple sensors. In this configuration, the amount of displacement and the story drift angle are calculated from the measurement results of the multiple sensors, and the soundness of the building is evaluated for each floor of the building and for each structural element (member) of the building. Although the configuration disclosed in Patent Document 3 can also perform detailed evaluation of the soundness of each component, it is necessary to install a sensor for each component in order to do so, which requires the installation of a large number of sensors and makes the system configuration complicated. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-8332 A [Patent Document 2] JP 2015-4526 A [Patent Document 3] JP 2020-143895 A Summary of the Invention [Problem to be solved by the invention]

[0006] The problem to be solved by the present invention is to provide a building integrity assessment system that has a simple configuration and is capable of accurately determining integrity. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention employs the following means. That is, the building soundness evaluation system of the present invention is a soundness evaluation system for diagnosing and evaluating the soundness of a building, and includes an analysis unit that performs a static incremental analysis in advance using a three-dimensional frame model configured to correspond to the building, including columns and beams, and calculates an analysis value of the energy absorption amount of each story and an analysis value of the energy absorption amount of each member including the columns and beams for each incremental step, which is a step of increasing the load in the analysis, and records them in an analysis result recording unit; an earthquake information recording unit that records earthquake information obtained from a sensor installed in the building; and an engine that calculates the story shear force and story displacement of each story based on the earthquake information and the weight of each story of the building, and calculates an estimated value of the energy absorption amount of each story based on the story shear force and the story displacement. an incremental step identification unit which selects, from the analysis values ​​of the energy absorption of each layer recorded in the analysis result recording unit, a minimum difference analysis value of the energy absorption of each layer which has the smallest difference from the estimated value of the energy absorption of each layer, and identifies the corresponding incremental step as the incremental step with the smallest difference; and a soundness determination unit which obtains an estimate of the energy absorption of each component from the analysis value of the energy absorption of each component which corresponds to the incremental step with the smallest difference, compares the estimated value of the energy absorption of each component with a damage determination threshold set for each component to calculate the degree of damage, and determines the soundness of the building based on the degree of damage of each component. According to this configuration, a static incremental analysis is performed using a three-dimensional frame model configured to correspond to a building including columns and beams, and the analysis value of the energy absorption amount of each story and the analysis value of the energy absorption amount of each member including columns and beams, which are calculated for each incremental step, which is a step of increasing the load in this static incremental analysis, are calculated by the analysis unit and recorded in the analysis result recording unit. When an earthquake occurs, the energy absorption amount estimation unit calculates an estimated value of the energy absorption amount of each story of the building based on earthquake information obtained from a sensor installed in the building and the weight of each story of the building. The soundness determination unit selects, from among the analysis values ​​of the energy absorption amounts of each story, a minimum difference analysis value of the energy absorption amount of each story that has a minimum difference from the estimated value of the energy absorption amount of each story, and identifies the incremental step in which the minimum difference analysis value corresponding to the selected minimum difference analysis value of the energy absorption amount of each story is output as a minimum difference incremental step. In the minimum difference incremental step identified in this way, the load is increased so that each story absorbs energy equivalent to the energy absorbed by each story when the earthquake occurred for which earthquake information was obtained. Therefore, the analysis value of the energy absorption amount of each component at the incremental step with the smallest difference in the static incremental analysis is considered to be a value close to the amount of energy absorbed by each component when the earthquake for which earthquake information was obtained occurred. Therefore, by obtaining an estimate of the energy absorption amount of each component from the analysis value of the energy absorption amount of each component corresponding to the incremental step with the smallest difference, and calculating the degree of damage based on the estimated energy absorption amount of each component by comparing it with the damage judgment threshold, it is possible to evaluate the degree of damage to each component that constitutes the building and judge the soundness of the building. In this way, by estimating the presence or absence of damage to the components that make up a building and the extent of that damage, damage assessment can be performed for each component, allowing for a highly accurate and reliable assessment of the soundness of the building. Furthermore, in the above-described configuration, although damage assessment can be performed for each component, there is no need to provide a sensor for each component, and therefore a large number of sensors are not required. Therefore, it is possible to provide a building soundness assessment system that has a simple configuration and is capable of accurately determining soundness.

[0008] In one aspect of the present invention, the analysis unit performs static incremental analysis on each of a story collapse model in which parameters are set for the three-dimensional frame model so that the building will undergo story collapse, and a global collapse model in which parameters are set for the three-dimensional frame model so that the building will undergo global collapse, and calculates, for each incremental step, an analytical value of the energy absorption amount of each story and an analytical value of the energy absorption amount of each member, and records them in the analysis result recording unit. The incremental step identification unit, for each combination of the analytical value of the energy absorption amount of each story in the story collapse model and the analytical value of the energy absorption amount of each story in the global collapse model, which are recorded in the analysis result recording unit, calculates, for each story, the analytical value of the energy absorption amount of each story in the story collapse model and the analytical value of the energy absorption amount of each member. the difference between the sum of the analytical value of the energy absorption amount of each story in the story collapse type model and the estimated value of the energy absorption amount of each story in the global collapse type model, the minimum difference combination which is a combination that minimizes the sum of the differences over all stories is selected as the minimum difference analytical value of the energy absorption amount of each story, the incremental step in the story collapse type model and the incremental step in the global collapse type model which correspond to the analytical value of the energy absorption amount of each story in the story collapse type model and the analytical value of the energy absorption amount of each story in the global collapse type model in the minimum difference combination are identified as the incremental step with the first smallest difference and the incremental step with the second smallest difference, respectively, and the soundness assessment unit assesses the soundness of the building based on the incremental step with the first smallest difference and the incremental step with the second smallest difference. Here, the "story collapse model with parameters set to cause story collapse" referred to above is specifically a three-dimensional frame model in which the strength of each beam and panel is set to be sufficiently large so that a story collapse mechanism is formed in which the columns yield first at the column-beam joints. Also, the "global collapse model with parameters set to cause total collapse" referred to above is specifically a three-dimensional frame model in which the strength of columns other than the first story column bases and the top story column capitals is set to be sufficiently large so that a total collapse mechanism is formed in which the beams or joint panels yield first at the column-beam joints. According to this configuration, a static incremental analysis is performed on each of a story collapse model in which parameters are set so that a story collapse occurs for a three-dimensional frame model, and a global collapse model in which parameters are set so that a global collapse occurs for a three-dimensional frame model. For each combination of the analysis value of the energy absorption amount of each story in the story collapse model and the analysis value of the energy absorption amount of each story in the global collapse model recorded in the analysis result recording unit, the difference between the sum of the analysis value of the energy absorption amount of each story in the story collapse model and the analysis value of the energy absorption amount of each story in the global collapse model and the estimated value of the energy absorption amount of each story is calculated for each story, and a minimum difference combination that is a combination that minimizes the sum of these differences in all stories is selected as the minimum difference analysis value of the energy absorption amount of each story. Then, the incremental step in the story collapse model and the incremental step in the global collapse model corresponding to the minimum difference combination selected in this way are identified as the first minimum difference incremental step and the second minimum difference incremental step, respectively. Here, by combining the states where the story collapse and the total collapse have progressed to the increment step with the first minimum difference and the increment step with the second minimum difference identified as described above by the static increment analysis, the energy absorption amount of each story is close to the estimated energy absorption amount at the time of the occurrence of the earthquake whose earthquake information was obtained. In other words, the increment step with the first minimum difference and the increment step with the second minimum difference can be regarded as the progress degree of each of the story collapse and the total collapse in the earthquake whose earthquake information was obtained. By determining the soundness of a building based on the incremental step with the smallest first difference and the incremental step with the smallest second difference identified in this manner, it is possible to estimate a collapse state that is closer to the damage caused to the building by the actual earthquake load, and to evaluate the soundness of the building with greater accuracy.

[0009] In one aspect of the present invention, the soundness assessment unit calculates, for each component, the sum of the analytical value of the energy absorption amount of each component in the layer collapse type model corresponding to the incremental step with the smallest first difference and the analytical value of the energy absorption amount of each component in the global collapse type model corresponding to the incremental step with the smallest second difference, and compares this as an estimated value of the energy absorption amount of each component with the damage assessment threshold to calculate the degree of damage. The analytical value of the energy absorption amount of each member in the story collapse model corresponding to the incremental step of the first minimum difference identified as above, and the analytical value of the energy absorption amount of each member in the total collapse model corresponding to the incremental step of the second minimum difference are obtained. As already explained, the incremental step of the first minimum difference and the incremental step of the second minimum difference are the progress of the story collapse and total collapse in the earthquake whose earthquake information was obtained, respectively, so the sum of the analytical values ​​of the energy absorption amount of each member corresponding to the incremental step of the first minimum difference and the incremental step of the second minimum difference obtained as above is considered to be a value close to the energy absorbed by each member when the earthquake whose earthquake information was obtained occurred. The soundness of the building can be evaluated with higher accuracy by comparing this sum with the damage judgment threshold for each member as an estimated value of the energy absorption amount of each member. Effect of the Invention

[0010] According to the present invention, it is possible to accurately determine the soundness with a simple configuration. [Brief description of the drawings]

[0011] [Figure 1]1 is a diagram showing a schematic configuration of a building soundness evaluation system in this embodiment. FIG. [Diagram 2] FIG. 1 is a diagram showing a schematic diagram of a layer-collapse type collapse mechanism. [Diagram 3] FIG. 13 is a diagram showing a schematic diagram of a total collapse type collapse mechanism. [Figure 4] FIG. 13 is a diagram showing an example of a collapse mechanism during an actual earthquake, and is a schematic diagram showing a collapse mechanism that combines a story collapse type and a total collapse type. [Diagram 5] FIG. 2 is a diagram for explaining members that constitute a three-dimensional framework model. [Figure 6] FIG. 13 is a diagram showing an example of static incremental analysis of a story-collapse type three-dimensional frame model. [Figure 7] FIG. 13 is a diagram showing an example of static incremental analysis of a total collapse type three-dimensional frame model. [Figure 8] This is a diagram showing how the amount of energy absorbed by each story of a building during an earthquake can be estimated by combining the amount of energy absorbed by the story-collapse model and the total-collapse model. [Figure 9] FIG. 13 is a diagram showing the amount of energy absorbed by a member when the member undergoes one cycle of deformation. [Figure 10] 2 is a flowchart showing the flow of a building health evaluation method in the building health evaluation system. [Figure 11] FIG. 1 is a diagram showing a verification example in which the energy absorption amount of each member constituting a building is estimated for a model 1 by the building soundness evaluation system in this embodiment. [Figure 12] FIG. 13 is a diagram showing a verification example in which the energy absorption amount of each component constituting a building is estimated for model 2 by the building soundness evaluation system in this embodiment. [Figure 13] FIG. 13 is a diagram showing a verification example in which the energy absorption amount of each component constituting a building is estimated for model 3 by the building soundness evaluation system in this embodiment. [Figure 14]FIG. 13 is a diagram showing a verification example in which the energy absorption amount of each component constituting a building is estimated for model 4 by the building soundness evaluation system in this embodiment. [Figure 15] FIG. 13 is a diagram showing a verification example in which the energy absorption amount of each member constituting a building is estimated for model 5 by the building soundness evaluation system in this embodiment. [Figure 16] FIG. 13 is a diagram showing a verification example in which the energy absorption amount of each member constituting a building is estimated for a model 6 by the building soundness evaluation system in this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of a building soundness evaluation system 1 according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a schematic configuration of a building soundness evaluation system 1 according to this embodiment. This invention is a building health monitoring system that targets buildings including columns and beams, estimates the amount of energy absorption in each story and each component of a building based on the results of static incremental analysis using a three-dimensional frame model composed of columns and beams, and earthquake information obtained from sensors installed in the building, and then compares the estimated energy absorption amount with a damage judgment threshold set for each component to calculate the degree of damage to each component, thereby diagnosing and evaluating the health of the building. 1, the building soundness evaluation system 1 includes a building 10 and an evaluation device 20. The building soundness evaluation system 1 evaluates the soundness of the building 10 after an earthquake occurs. The building 10 is constructed on the ground and has multiple stories 11 in the vertical direction. In this embodiment, the building 10 is constructed as a so-called rigid frame structure. The number of stories and structure (reinforced concrete structure, steel frame structure, reinforced concrete structure, etc.) of the building 10 are not limited in any way. The building 10 is provided with sensors 12. In this embodiment, the sensors 12 are installed on each floor 11 of the building 10. When each sensor 12 detects shaking exceeding a preset threshold during an earthquake, it detects acceleration waveform data on each floor 11 of the building 10. Each sensor 12 has a memory (not shown) and a communication unit (not shown). Each sensor 12 stores the detected acceleration waveform data in the memory (not shown) as earthquake information. After the earthquake ends, the sensor 12 transfers the acceleration waveform data stored in the memory from the communication unit to the evaluation device 20 via the external network 100. Here, the external network 100 is, for example, a public wireless network that can wirelessly communicate with the communication unit. The communication unit transmits earthquake information detected by the sensor 12 to the evaluation device 20 via the external network 100 as shown in FIG.

[0013] The evaluation device 20 is connected to an external network 100 by wire or wirelessly. The evaluation device 20 evaluates the soundness of the building 10 based on earthquake information detected by the sensor 12. Fig. 2 is a schematic diagram of a collapse mechanism of a story collapse type, Fig. 3 is a schematic diagram of a collapse mechanism of a total collapse type, and Fig. 4 is a schematic diagram of a collapse mechanism that combines a story collapse type and a total collapse type, showing an example of a collapse mechanism during an actual earthquake. When the rigid frame that constitutes the building 10 receives a strong earthquake motion, the members become plastic and a collapse mechanism is formed. The collapse mechanism is roughly divided into a "story collapse type" where the columns yield first at the column-beam joints as shown in FIG. 2, and a "global collapse type" where the beams or the joints between the columns and beams yield first as shown in FIG. 3. The collapse mechanism is assumed at the time of design based on the strength ratio of the columns, beams, and the joints between the columns and beams, but the collapse mechanism is not necessarily formed as expected during an actual strong earthquake because it is affected by the input direction and the variation in the member strength. In addition, unless the member-to-member strength ratio is an extreme value, it is highly likely that the damage distribution will show a mixture of the "story collapse type" and the "global collapse type" during a strong earthquake, as shown in FIG. 4. Therefore, even if the story deformation angle of each story is known by monitoring with the sensor 12, it is considered that the members that are damaged and the degree of damage will differ depending on the collapse mechanism formed at that time. Therefore, based on the earthquake information detected by the sensor 12, the evaluation device 20 estimates the progress of each of the story collapse type collapse mechanisms and the total collapse type collapse mechanisms that have occurred in the building 10, and based on the estimation results, estimates the degree of damage that has occurred in each component of the building 10, and judges the soundness of the building based on the degree of damage to each component. Here, the "story collapse model with parameters set to cause story collapse" referred to above is specifically a three-dimensional frame model in which the strength of each beam and panel is set to be sufficiently large so that a story collapse mechanism is formed in which the columns yield first at the column-beam joints. Also, the "global collapse model with parameters set to cause total collapse" referred to above is specifically a three-dimensional frame model in which the strength of columns other than the first story column bases and the top story column capitals is set to be sufficiently large so that a total collapse mechanism is formed in which the beams or joint panels yield first at the column-beam joints.

[0014] As shown in FIG. 1, the evaluation device 20 mainly includes an analysis unit 21, an analysis result recording unit 27, an earthquake information recording unit 22, an energy absorption estimation unit 23, an incremental step identification unit 24, and a soundness judgment unit 25. The analysis unit 21 calculates an analytical value of the energy absorption amount of each story 11 of the building 10 and an analytical value of the energy absorption amount of each member constituting the building 10 by performing an analysis in advance using a three-dimensional frame model M configured to correspond to the building 10 as shown in Figures 2 and 3. The analysis result recording unit 27 is a so-called database, in which the analytical value of the energy absorption amount of each story 11 of the building 10 and the analytical value of the energy absorption amount of each member constituting the building 10 calculated by the analysis unit 21 are recorded. FIG. 5 is a diagram for explaining members that constitute the three-dimensional framework model. The analysis unit 21 uses a three-dimensional frame model M including columns 16 and beams 17 for the analysis, as shown in Fig. 5. In the three-dimensional frame model M, the columns 16 and beams 17 are replaced with wire rods as elements that can take into account deformation in the axial, shear, bending, and torsional directions, respectively. Since both ends of the columns 16 and beams 17 become plastic during an earthquake, the energy absorption amount is calculated for both ends 16a, 16b, 17a, and 17b of the columns 16 and beams 17. The joint between the columns 16 and beams 17 is treated as a panel 19 consisting of a rigid beam 19a and a diagonal member 19b made of an elastic-plastic spring element, and the energy absorption amount is calculated.

[0015] The analysis unit 21 performs static incremental analysis using a story collapse model M1, in which parameters are set so that the building 10 undergoes story collapse with respect to the three-dimensional frame model M as shown in Fig. 2, and a global collapse model M2, in which parameters are set so that the building 10 undergoes global collapse with respect to the three-dimensional frame model M as shown in Fig. 3. The story collapse model M1 has parameters set so that the strength of beams and panels is sufficiently large so that story collapse progresses during static incremental analysis. The global collapse model M2 has parameters set so that the bending strength of the end of columns is sufficiently large except for the column bases of the lowest story and the column capitals of the highest story so that global collapse progresses during static incremental analysis. Fig. 6 is a diagram showing an example of a static incremental analysis of a story-collapse type three-dimensional frame model. Fig. 7 is a diagram showing an example of a static incremental analysis of a whole-collapse type three-dimensional frame model. In static incremental analysis, the load, i.e., seismic force, acting on the three-dimensional frame models M1 and M2 of the building 10 is gradually increased, and the behavior of the building is analyzed at each incremental step, which is the step of increasing the load. In each of Figs. 6 and 7, the i1th incremental step is shown on the left, in which the energy absorption amount of each story and each member is small, shortly after the start of the static incremental analysis. The i2th incremental step is shown on the right, in which the load is further applied from the i1th incremental step, the energy absorption amount of each story and each member increases, and story collapse or total collapse has progressed. In the static push-back analysis, the Ai distribution, which is the external force distribution, is determined from the height of the building 10, the weight of each story 11, and the primary design natural period. In the static push-back analysis, calculations are performed so that the external force is gradually increased while maintaining the Ai distribution.

[0016] Next, based on the results of the static incremental analysis, the analysis unit 21 calculates the analytical values ​​of the energy absorption amount of each story and the analytical values ​​of the energy absorption amount of each component including the columns 16 and beams 17 for each incremental step in the static incremental analysis. For this purpose, first, based on the results of the static incremental analysis of the story collapse model M1, the analysis unit 21 calculates the energy absorption amount of each story and the energy absorption amount of each component (columns 16, beams 17, panels 19) for each incremental step, which is the stage at which the load is increased in the static incremental analysis, with the X direction, which is one direction located in the horizontal plane, and the Y direction, which is a direction perpendicular to the X direction in the horizontal plane, as the load directions, and records these in the analysis result recording unit 27 as the analysis values ​​of the energy absorption amount of each story and the analysis values ​​of the energy absorption amount of each component. In practice, the analysis unit 21 calculates the following values. sE wcX (i,j): The analytical value of the energy absorption amount of the jth story from the bottom at the ith incremental step during loading in the X direction in the static incremental analysis result of the story collapse model M1. sE wcY (i,j): The analytical value of the energy absorption amount of the jth story from the bottom at the ith incremental step during Y-direction loading in the static incremental analysis results of the story collapse model M1. eE wcX (i, k): The analytical value of the energy absorption amount of the kth member at the i-th incremental step when loading in the X direction in the static incremental analysis result of the story collapse model M1. eE wcY (i, k): The analytical value of the energy absorption amount of the kth member at the ith incremental step when loading in the Y direction in the static incremental analysis result of the story collapse model M1. As shown in Figure 6, in the story-collapse model M1, when the applied load in the load direction (X direction, Y direction) along the horizontal plane is gradually increased with each incremental step, the bottom story finally collapses, and the energy absorption amount in the bottom story is significantly greater than that of the upper stories. Also, the collapse in the bottom story is mainly due to damage to the columns, and the energy absorption amount in the columns in the bottom story is significantly greater than that of other elements such as beams and panels.

[0017] In addition, based on the results of the static incremental analysis of the total-collapse type model M2, the analysis unit 21 calculates the energy absorption amount of each story and the energy absorption amount of each component (columns 16, beams 17, panels 19) for each incremental step in each of the X and Y directions, and records these in the analysis result recording unit 27 as the analytical values ​​of the energy absorption amount of each story and the analytical values ​​of the energy absorption amount of each component. In practice, the analysis unit 21 calculates the following values. sE osX (i,j): The analytical value of the energy absorption amount of the jth story from the bottom at the i-th incremental step when loading in the X direction in the static incremental analysis result of the global collapse model M2. sE osY (i,j): The analytical value of the energy absorption amount of the jth story from the bottom at the ith incremental step when loading in the Y direction in the static incremental analysis result of the global collapse model M2. eE osX (i, k): The analytical value of the energy absorption amount of the kth member at the i-th incremental step when loading in the X direction in the static incremental analysis result of the global collapse model M2. eE osY(i, k): The analytical value of the energy absorption amount of the kth member at the i-th incremental step when loading in the Y direction in the static incremental analysis result of the total collapse type model M2. As shown in Fig. 7, in the total collapse model M2, when the applied load in the load direction (X direction, Y direction) along the plane is gradually increased, the amount of energy absorbed increases in all stories of the building 10. Similarly, the amount of energy absorbed by each component increases. In each story, the amount of energy absorbed increases not only in the columns but also in the beams, panels, etc.

[0018] When an earthquake occurs, the earthquake information recording unit 22 records earthquake information transmitted from the communication unit 14 of the sensor 12 in the building 10 via the external network 100. The earthquake information recording unit 22 records acceleration waveform data in each story 11 of the building 10 detected by the sensor 12 when an earthquake occurs. The energy absorption estimation unit 23 calculates the story shear force and story displacement of each story 11 based on the earthquake information detected by the sensor 12 and the weight of each story 11 of the building 10, and calculates an estimated energy absorption amount of each story based on the story shear force and story displacement.

[0019] First, the energy absorption amount estimation unit 23 calculates the story shear force in each story 11 based on the acceleration waveform data of each story 11 obtained by the sensor 12 during an earthquake and the weight of each story 11. More specifically, let QX(j), QY(j), and QZ(j) be the story shear forces in the X, Y, and Z directions perpendicular to the X and Y directions, respectively, on the jth story, and FX(j), FY(j), and FZ(j) be the inertial forces in the X, Y, and Z directions, respectively, on the jth story. At this time, on the top floor, QX(j), QY(j), and QZ(j) are respectively, QX(j)=FX(j), QY(j)=FY(j), QZ(j)=FZ(j), In addition, except for the top floor, the story shear force acting on the jth story from the bottom is the sum of the inertial forces in the upper stories, so if the total number of stories is T, then

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[0020] Next, the energy absorption estimation unit 23 calculates an estimated value of the energy absorption amount in each story 11 for each of the two horizontal directions (X direction and Y direction) based on the story shear force and inter-story displacement in each story 11 calculated as described above. In practice, the energy absorption amount estimating unit 23 calculates the following values. sE obsX (j): Estimated energy absorption in the jth layer from the bottom in the X direction, calculated based on earthquake information. sE obsY (j): Estimated energy absorption amount of the jth layer from the bottom in the Y direction, calculated based on earthquake information. It is. Specifically, the energy absorption amount estimation unit 23 estimates the above-mentioned estimated value sE of the energy absorption amount in each story 11 based on the story shear force in each story 11 calculated from the earthquake information and the history area in relation to the story displacement. obsX (j), sE obsY Calculate (j).

[0021] The incremental step identification unit 24 selects the estimated energy absorption amount sE of each layer from the analysis values ​​of the energy absorption amount of each layer 11 recorded in the analysis result recording unit 27. obsX (j), sE obsYThe minimum difference analytical value of the energy absorption amount of each layer that has the smallest difference from (j) is selected, and the corresponding incremental step is identified as the incremental step with the smallest difference. The incremental step identifying unit 24 will be described in detail below. n wcX is the total number of incremental steps in which the load is increased when loading in the X direction in the static incremental analysis results of the story collapse model M1, n wcY is the total number of incremental steps in which the load is increased when loading in the Y direction in the static incremental analysis results of the story collapse model M1, n osX is the total number of incremental steps in which the load is increased when loading in the X direction in the static incremental analysis results of the total collapse type model M2, n osY is the total number of incremental steps for increasing the load when loading in the Y direction in the static incremental analysis results of the global collapse model M2.

[0022] The total number of incremental steps in the static increment analysis results for the story collapse model M1 when loading in the X direction is n wcX The total number of incremental steps in the static incremental analysis results for the total collapse model M2 when loading in the X direction is n osX Therefore, the combination of the energy absorption amount of each story when loading in the X direction in the static stepwise analysis result of the story collapse type model M1 and the energy absorption amount of each story when loading in the X direction in the static stepwise analysis result of the global collapse type model M2 is n wcX ×n osX There are . The incremental step identification unit 24 identifies these n wcX ×n osX For all combinations, the story energy difference e in the X direction when loading is performed is calculated using the following equation (1). x Calculate the layer energy difference e when loading in the X direction. xThe minimum difference combination, which is the combination that minimizes the difference between the energy absorption amounts of each story, is selected as the minimum difference analysis value of the energy absorption amount of each story. In this minimum difference combination, the increment step i at the time of loading in the X direction in the static increment analysis result of the story collapse type model M1, which corresponds to the analysis value of the energy absorption amount of each story in the story collapse type model M1 and the analysis value of the energy absorption amount of each story in the global collapse type model M2, is selected as the minimum difference analysis value of the energy absorption amount of each story in the story collapse type model M1. wcX (1≦i wcX ≦n wcX ) and the incremental step i when loading in the X direction in the static incremental analysis results of the total collapse type model M2 osX (1≦i osX ≦n osX ) combinations.

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[0023] Similarly, the combination of the energy absorption amount of each story when loading in the Y direction in the static incremental analysis results of the story-collapse model M1 and the energy absorption amount of each story when loading in the Y direction in the static incremental analysis results of the global collapse model M2 is n wcY ×n osY There are . The incremental step identification unit 24 identifies these n wcY ×n osY For all combinations, the Y-direction loading layer energy difference e Y Calculate the layer energy difference e when loading in the Y direction. Y The minimum difference combination, which is the combination that minimizes the difference between the energy absorption amounts of each story, is selected as the minimum difference analysis value of the energy absorption amount of each story. In this minimum difference combination, the increment step i at the time of Y-direction loading in the static increment analysis result of the story collapse model M1, which corresponds to the analysis value of the energy absorption amount of each story in the story collapse model M1 and the analysis value of the energy absorption amount of each story in the global collapse model M2, is selected as the minimum difference analysis value of the energy absorption amount of each story in the story collapse model M1. wcY (1≦i wcY ≦n wcY ) and the incremental step i when loading in the Y direction in the static incremental analysis results of the total collapse type model M2 osY (1≦i osY ≦nosY ) combinations.

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[0024] The operation of the incremental step identification unit 24 and the soundness assessment unit 25 described later is based on the premise that the amount of energy absorbed by each story (and each component) when the building 10 is subjected to earthquake motion after damage has progressed to a certain extent is the same as the amount of energy absorbed by each story (and each component) when the building 10 is subjected to the same earthquake motion in its newly constructed state. For example, consider a case where the building 10 begins to collapse globally, and then story collapse progresses. In such a case, the amount of energy Ea that the building 10 ultimately absorbs can be considered to be the sum E1+E2 of the amount of energy E1 that the building 10 absorbs from when it is newly constructed until the point at which the overall collapse has progressed and the amount of energy E2 that the building 10 absorbs from the point at which the overall collapse has progressed until the point at which the story collapse has progressed. Here, according to the above assumptions, the amount of energy E2 absorbed from the time when the overall collapse has progressed to the time when the story collapse has progressed is equal to the amount of energy E2' absorbed from when the building 10 was newly constructed to the time when the story collapse has progressed (without going through overall collapse). In other words, the above sum E1+E2 is equal to the sum E1+E2' of the amount of energy E1 absorbed from when the building 10 was newly constructed to the time when the overall collapse has progressed and the amount of energy E2' absorbed from when the building 10 was newly constructed to the time when the story collapse has progressed (without going through overall collapse). Therefore, based on the above assumptions, from the perspective of the amount of energy absorbed by each story and each component, even if story collapse and total collapse occur in building 10 one after the other, or simultaneously, this can be regarded as the sum of the states in which story collapse and total collapse have occurred individually in building 10, each of which has progressed to a certain degree.

[0025] Figure 8 is a diagram conceptually illustrating how the energy absorption amount in each story of a building during an earthquake can be estimated by combining the energy absorption amount in the story-collapse model and the energy absorption amount in the total-collapse model. Based on the above considerations, in this embodiment, it is assumed that when an earthquake actually occurs, the building 10 collapses in both stories and in its entirety due to the earthquake, and the estimated energy absorption amount sE of each story calculated from earthquake information is calculated as obsX (j), sE obsY (j) is a step (i.e., incremental step i) of the static incremental analysis using the story collapse model M1, which is recorded in the analysis result recording unit 27. wcX , i wcY )Analysis value of the energy absorption amount of each layer sE wcX (i wcX ,j), sE wcY (i wcY ,j) and one of the stages (i.e., incremental step i osX , i osY )Analysis value of the energy absorption amount of each layer sE osX (i osX ,j), sE osY (i osY ,j) and consider whether it can be expressed as the sum of. If the estimated energy absorption amount of each layer calculated from earthquake information is sE obsX (j), sE obsY (j) is a step i of a static increment analysis using the story collapse model M1, which is recorded in the analysis result recording unit 27. wcX , i wcY The analytical value of the energy absorption of each layer sE wcX (i wcX ,j), sE wcY (i wcY ,j) and some incremental step i of the static incremental analysis using the global collapse model M2 osX , i osY The analytical value of the energy absorption of each layer sE osX (i osX ,j), sE osY (i osY, j) and the sum of , then in the static incremental analysis using the story collapse model M1, the story collapse occurs at incremental step i wcX , i wcY The state where the total collapse has progressed by incremental step i in the static increment analysis using the total collapse model M2. osX , i osY The state in which the 1st stage is completed can be considered to be a combination of the state in which the 2nd stage is completed and the state in which the 3rd stage is completed.

[0026] Here, the layer energy difference e in the X direction when loaded is expressed as equation (1) as above. x is the increment step i during the X-direction loading in the static increment analysis results of the story collapse model M1. wcX The analytical value of the amount of energy absorbed at wcX (i wcX ,j) and the static increment analysis results of the total collapse model M2 when loading in the X direction at a certain increment step i osX The analytical value of the amount of energy absorbed at osX (i osX , j) for each layer, the energy absorption amount sE in the X direction calculated from earthquake information obsX The sum of the differences with (j). Therefore, the layer energy difference e in the X direction when loading in equation (1) x The analytical value sE of the energy absorption amount when loading in the X direction in the static incremental analysis result of the story collapse type model M1, which is the minimum. wcX (i wcX ,j) and the analytical value sE of the energy absorption amount when loading in the X direction in the static incremental analysis results of the total collapse type model M2 osX (i osX , j) is selected as the minimum analytical value of the difference of the energy absorption amount of each story in the X direction. The analytical value sE of the energy absorption amount of each story in the story collapse model M1 in this minimum combination of differences is wcX (i wcX ,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i osX ,j) corresponding to the incremental step i wcX , increment step iosX respectively, the first difference minimum incremental step i wcX , the second difference minimum incremental step i osX It can be identified as: Similarly, the layer energy difference e when loaded in the Y direction, expressed as equation (2) above, Y is the incremental step i during Y-direction loading in the static incremental analysis results of the story collapse model M1. wcY The analytical value of the amount of energy absorbed at wcY (i wcY ,j) and the Y-direction loading in the static increment analysis results of the total collapse type model M2 at a certain increment step i osY The analytical value of the amount of energy absorbed at sE osY (i osY , j) for each layer, calculated from earthquake information, obsY The sum of the differences with (j). Therefore, the layer energy difference e in the Y direction in equation (2) Y The analytical value sE of the energy absorption amount when loading in the Y direction in the static incremental analysis result of the story collapse type model M1, which is the minimum. wcY (i wcY ,j) and the analytical value sE of the energy absorption amount when loading in the Y direction in the static incremental analysis results of the total collapse type model M2 osY (i osY , j) is selected as the minimum analytical value of the difference in the energy absorption amount of each story in the X direction. The analytical value sE of the energy absorption amount of each story in the story collapse model M1 in this minimum combination of differences is wcY (i wcY ,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osY (i osY ,j) corresponding to the incremental step i wcY , increment step i osY respectively, the first difference minimum incremental step i wcY , the second difference minimum incremental step i osY It can be identified as:

[0027] Based on the above considerations, the incremental step identification unit 24 calculates the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 in the X direction. wcX (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), n wcX ×n osX For each of the combinations, for each layer 11, the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 wcX (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX The sum of (i,j) and the estimated energy absorption of each layer sE obsX (j) and calculate the sum of the differences over all layers e x The minimum difference combination, which is a combination of analytical values ​​that minimizes the difference, is selected as the minimum difference analytical value of the energy absorption amount of each story, and the analytical value sE of the energy absorption amount of each story in the story collapse model M1 in the minimum difference combination is wcX (i wcX ,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i osX ,j) increment step i in the layer-collapse model M1 wcX and the incremental step i in the globally collapsed model M2 osX respectively, the first differential minimum incremental step i wcX and the second difference minimum incremental step i osX Identify as: Similarly, the incremental step identification unit 24 calculates the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 in the Y direction. wcY (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osY (i,j), n wcY ×n osY For each of the combinations, for each layer 11, the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 wcY (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osYThe sum of (i,j) and the estimated energy absorption of each layer sE obsY (j) and calculate the sum of the differences over all layers e Y The minimum difference combination, which is a combination of analytical values ​​that minimizes the difference, is selected as the minimum difference analytical value of the energy absorption amount of each story, and the analytical value sE of the energy absorption amount of each story in the story collapse model M1 in the minimum difference combination is wcY (i wcY ,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osY (i osY ,j) increment step i in the layer-collapse model M1 wcY and the incremental step i in the globally collapsed model M2 osY respectively, the first differential minimum incremental step i wcY and the second difference minimum incremental step i osY Identify as:

[0028] The soundness determination unit 25 determines the incremental step i i with the first minimum difference in each of the X direction and the Y direction identified as described above. wcX , i wcY , the second difference minimum incremental step i osX , i osY Based on this, the soundness of the building 10 is judged. As described above, the incremental step identification unit 24 determines the incremental step i with the smallest first difference in each of the X direction and the Y direction. wcX , i wcY , the second difference minimum incremental step i osX , i osY By identifying the above, it is possible to identify the stage, i.e., the incremental step, to which the story collapse and the overall collapse have progressed in the static incremental analysis using the story collapse model M1 and the static incremental analysis using the overall collapse model M2, in the earthquake for which earthquake information has been obtained. If this is the case, then in an actual earthquake, each component will be in a state where the story collapse and the overall collapse have progressed at the incremental step i wcX , i wcY The analytical value of the amount of energy absorbed by the component at the stage eE wcX (iwcX ,k), eE wcY (i wcY , k) and the incremental step i in the static incremental analysis using the global collapse model M2 osX , i osY The analytical value of the amount of energy absorbed by the component at the stage eE osX (i osX ,k), eE osY (i osY ,k) can be considered to have absorbed the combined amount of energy. Therefore, the soundness determination unit 25 specifically calculates an estimated value eE of the energy absorption amount of each member by the following equation (3): obs Calculate (k).

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[0029] The soundness determination unit 25 further determines the first difference minimum increment step i wcX , i wcY and the second difference minimum incremental step i osX , i osY The estimated energy absorption amount of each component, eE, derived based on obs The soundness of the building 10 is judged based on (k). The soundness judgement unit 25 estimates the energy absorption amount of each member eE obsThe soundness determination unit 25 compares (k) with a preset damage determination threshold value to calculate the degree of damage. obs If (k) is greater than the damage determination threshold, it is determined that there is a possibility that damage has occurred in the component. Here, as the damage judgment threshold, for example, the damage judgment threshold μ of the plasticity rate according to the plastic deformation performance of the member is used. cr As shown in FIG. 9, when a member undergoes one cycle of deformation with a plasticity factor μ, the amount of energy absorbed E in the member is expressed by the following formula (4). E = 4(μ-1)Myθy (4) Therefore, the damage threshold E cr teeth, E cr =4(μ cr -1)M y θ y It becomes. For example, the half length from the end to the center is 1750 mm, and the yield strength is 295 N / mm 2 For a square steel pipe with a cross-sectional dimension of 300 mm x 300 mm and a thickness of 9 mm (yield bending moment My = 327 kNm, member angle θy = 0.0065 rad at yield), μ cr = 3.0, E cr =17.0kNm. Such damage determination thresholds are not limited to the above, and may be appropriately set by other methods, and may be set in different ways for each type of member, such as the pillars 16, beams 17, etc. The soundness assessment unit 25 outputs information indicating the assessment results, such as the calculated degree of damage and whether or not damage has occurred to the components, via a monitor device or another terminal accessible via the external network 100. The damage level mentioned above is evaluated from Damage Level I to Damage Level IV. Damage Level I is defined as a state where there is almost no damage to the columns, beams, and bearing walls. Damage Level II is a state where minor cracks have occurred in the columns, beams, and bearing walls. Damage Level III is defined as a state where significant shear cracks are observed in the columns, beams, and bearing walls, and Damage Level IV is defined as a state where large shear cracks are observed in the columns, beams, and bearing walls, resulting in major damage.

[0030] In this way, the soundness determination unit 25 selects the increment step i wcX , i wcY , i osX , i osY The estimated energy absorption of each component corresponding to eE obs The degree of damage is calculated by comparing (k) with the damage judgment threshold set for each component, and the soundness of the building 10 is judged based on the degree of damage of each component. The soundness of the building 10 is evaluated as safe, caution required, or danger. The safety index based on the soundness evaluation corresponds to damage levels I and II. The caution index based on the soundness evaluation corresponds to damage level III, and the danger index corresponds to damage level IV.

[0031] (Soundness assessment method) FIG. 10 is a flowchart showing the flow of the building soundness evaluation method in the building soundness evaluation system 1. In order to evaluate the soundness of the building 10 using the evaluation device 20, as a preliminary step, a static incremental analysis is performed in advance in the analysis unit 21 using the story collapse model M1 and the global collapse model M2. The analysis unit 21 calculates an analytical value of the energy absorption amount of each story and an analytical value of the energy absorption amount of each component for each incremental step, which is a stage at which the load is increased in the static incremental analysis. The calculated analytical values ​​of the energy absorption amount of each story and the analytical values ​​of the energy absorption amount of each component are recorded in the analysis result recording unit 27. Thereafter, when an earthquake occurs, the evaluation device 20 acquires earthquake information detected by the sensor 12 provided in the building 10 from the external network 100 (step S11). When the earthquake information is acquired, the energy absorption estimation unit 23 of the evaluation device 20 calculates the story shear force and inter-story displacement of each story 11 based on the earthquake information detected by the sensor 12 and the weight of each story 11 of the building 10, and calculates an estimated value of the energy absorption of each story based on the calculated story shear force and inter-story displacement (step S12).

[0032] Next, the incremental step identification unit 24 selects the minimum analytical value of the energy absorption amount of each layer, which has the smallest difference from the estimated value of the energy absorption amount of each layer, from the analytical values ​​of the energy absorption amount of each layer recorded in the analysis result recording unit 27, and identifies the corresponding incremental step as the incremental step with the smallest difference (step S13). More specifically, for each combination of the analysis value of the energy absorption amount of each layer in the layer collapse type model M1 and the analysis value of the energy absorption amount of each layer in the global collapse type model M2 recorded in the analysis result recording unit 27 in the X direction and the Y direction, the incremental step identification unit 24 calculates, for each layer, the difference between the sum of the analysis value of the energy absorption amount of each layer in the static incremental analysis result of the layer collapse type model M1 and the analysis value of the energy absorption amount of each layer in the static incremental analysis result of the global collapse type model M2 and the estimated value of the energy absorption amount of each layer, and selects a minimum difference combination, which is a combination that minimizes the sum of the differences in all layers, as the minimum difference analysis value of the energy absorption amount of each layer, and identifies the incremental step in the layer collapse type model M1 and the incremental step in the global collapse type model M2 corresponding to the analysis value of the energy absorption amount of each layer in the layer collapse type model M1 and the analysis value of the energy absorption amount of each layer in the global collapse type model M2 in the minimum difference combination as the first minimum difference incremental step and the second minimum difference incremental step, respectively.

[0033] The soundness assessment unit 25 derives an estimate of the energy absorption amount of each component by calculating, for each component, the sum of the analytical value of the energy absorption amount of each component in the layer collapse type model M1 corresponding to the incremental step with the smallest first difference and the analytical value of the energy absorption amount of each component in the total collapse type model M2 corresponding to the incremental step with the smallest second difference (step S14). Thereafter, the soundness determining unit 25 determines the soundness of the building 10 based on the estimated energy absorption amount of each component derived based on the first minimum difference increment step and the second minimum difference increment step (step S15). The soundness determining unit 25 compares the estimated energy absorption amount of each component with a preset damage determination threshold to calculate the degree of damage. When the estimated energy absorption amount of each component is greater than the damage determination threshold, the soundness determining unit 25 determines that there is a possibility that damage has occurred in that component. Furthermore, the soundness assessment unit 25 outputs information indicating the assessment results, such as the calculated degree of damage and whether or not damage has occurred to the components, via a monitor device or another terminal accessible via the external network 100 (step S16).

[0034] (Verification of estimation accuracy using soundness evaluation method) Here, the estimation accuracy of the building soundness evaluation system 1 of the present invention was verified. Six models, Model 1 to Model 6, were prepared as the framework for realizing the building to be verified. Model 1 has four stories, with a column span of 2 in the X direction and 1 in the Y direction, and the column strength ratio γ, which is the strength ratio of the columns to the beams and panels, is 1.0. Model 2 has four stories, with a column span of 2 in the X direction, a column span of 1 in the Y direction, and a column strength ratio γ of 1.5. Model 3 has 8 stories, the column span in the X direction is 3, the column span in the Y direction is 2, and the column strength ratio γ is 1.0. Model 4 has 8 stories, the column span in the X direction is 3, the column span in the Y direction is 2, and the column strength ratio γ is 1.5. Model 5 has 12 stories, the column span in the X direction is 4, the column span in the Y direction is 3, and the column strength ratio γ is 1.0. Model 6 has 12 stories, the column span in the X direction is 4, the column span in the Y direction is 3, and the column strength ratio γ is 1.5. In all of the above models, the structural characteristic coefficient Ds was set to 0.4. For each of these models, the Hachinohe wave level 3 was input as an input seismic wave from a direction at an angle of 45° to each of the X and Y directions. In this case, the energy absorption amount of each component in each of the X and Y directions calculated from the acceleration information detected by the sensor 12 was taken as the correct value, and the estimated value eE of the energy absorption amount of each component estimated by the soundness evaluation system 1 was taken as the correct value. obs (k) was used as the estimated value.

[0035] 11 to 16 are diagrams showing examples of verification in which the building soundness evaluation system 1 in this embodiment estimates the energy absorption amount of each member constituting a building for each of models 1 to 6. In Fig. 11 to Fig. 16, the differences that are the comparison results between the correct values ​​and the estimated values ​​are shown for both ends of columns and beams, and for panels. From each figure, it can be seen that in the model where the column strength ratio γ is set to a small value of 1.0, the story collapse mechanism of the lowest story becomes dominant, and the static analysis results of the story collapse model M1 are reflected as is, and an estimate close to the correct value can be obtained. Even in frames where the column strength ratio γ is set to 1.5 and where the overall collapse mechanism is dominant, the energy absorption of the columns can be estimated with good accuracy, and the locations of beams and panels where energy absorption is high are also generally consistent. Here, there are correct values ​​where the energy absorption at both ends of a single beam differs greatly, but this is thought to be due to the fact that in the response to the dominant direction, the strength of one end increases due to the composite effect of the slab, causing almost no plasticization, and energy absorption is concentrated at the other end, resulting in a difference from the estimated value based on a static analysis that does not consider the composite effect. In this verification, examples were presented that were based on steel rigid frame structures; however, the same phenomenon occurs in reinforced concrete structures, in that plasticity occurs in the ends of columns and beams and in panels. Therefore, the validity is considered to be ensured at response levels where extremely severe damage does not occur.

[0036] The soundness evaluation system 1 of the building 10 as described above is a soundness evaluation system 1 that diagnoses and evaluates the soundness of the building 10, and performs a static incremental analysis in advance using a three-dimensional frame model M (M1, M2) configured to correspond to the building 10 including columns 16 and beams 17, and calculates an analysis value sE of the energy absorption amount of each story for each incremental step, which is a step of increasing the load in the analysis. wcX (i,j), sE wcY (i,j), sE osX (i,j), sE osY (i, j), and the analytical value eE of the energy absorption of each member including the column 16 and the beam 17 wcX (i, k), eE wcY (i, k), eE osX (i, k), eE osY (i, k) and record it in the analysis result recording unit 27; an earthquake information recording unit 22 that records earthquake information obtained from a sensor 12 installed in the building 10; and a calculation unit 23 that calculates the story shear force and the story displacement of each story 11 based on the earthquake information and the weight of each story 11 of the building 10, and calculates an estimated value sE of the energy absorption amount of each story based on the story shear force and the story displacement. obsX (j), sE obsY (j) is calculated by the energy absorption estimation unit 23, and the analysis value sE of the energy absorption of each layer recorded in the analysis result recording unit 27 is calculated by the energy absorption estimation unit 23. wcX (i,j), sE wcY (i,j), sE osX (i,j), sE osY From (i,j), the estimated energy absorption amount of each layer sE obsX (j), sE obsY (j) is the minimum analytical value of the energy absorption amount of each layer that minimizes the difference with (j) (the analytical value sE of the energy absorption amount of each layer in the layer collapse model M1) wcX (i,j), sE wcY (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), sE osY (i,j)) and set the corresponding incremental step to the incremental step i with the smallest difference. wcX , i wcY , i osX , i osYand an incremental step identification unit 24 for identifying the incremental step i wcX , i wcY , i osX , i osY Analytical value of the energy absorption of each member corresponding to eE wcX (i wcX ,k), eE wcY (i wcY ,k), eE osX (i osX ,k), eE osY (i osY , k), the estimated energy absorption amount of each component eE obs (k) is obtained, and the estimated energy absorption amount of each component is calculated as eE obs (k) is compared with a damage judgment threshold set for each component to calculate the degree of damage, and a soundness judgment unit 25 judges the soundness of the building 10 based on the degree of damage of each component. According to this configuration, a static incremental analysis is performed using a three-dimensional frame model M (M1, M2) configured to correspond to the building 10 including the columns 16 and beams 17, and the analysis value sE of the energy absorption amount of each story calculated for each incremental step, which is the step of increasing the load in this static incremental analysis, is calculated. wcX (i,j), sE wcY (i,j), sE osX (i,j), sE osY (i, j) and the analytical value eE of the energy absorption of each member including the column 16 and the beam 17 wcX (i, k), eE wcY (i, k), eE osX (i, k), eE osY (i, k) are calculated by the analysis unit 21 and recorded in the analysis result recording unit 27. When an earthquake occurs, the energy absorption amount estimation unit 23 calculates an estimated value sE of the energy absorption amount in each story of the building 10 based on earthquake information obtained from the sensor 12 installed in the building 10 and the weight of each story 11 of the building 10. obsX (j), sE obsY (j). The soundness determination unit 25 calculates the analytical value sE of the energy absorption amount of each layer. wcX (i,j), sE wcY (i,j), sE osX (i,j), sEosY From (i,j), the estimated energy absorption amount of each layer sE obsX (j), sE obsY The analytical value of the energy absorption of each layer selected by selecting the minimum difference analytical value of the energy absorption of each layer that has the smallest difference with (j) is wcX (i,j), sE wcY (i,j), sE osX (i,j), sE osY The incremental step at which the minimum differential analysis value corresponding to (i,j) is output as a result is called the incremental step i wcX , i wcY , i osX , i osY The incremental step i with the minimum difference identified in this way is wcX , i wcY , i osX , i osY In the static incremental analysis, the load is increased so that each layer 11 absorbs the same amount of energy as that absorbed by each layer 11 when the earthquake for which the earthquake information was obtained occurred. wcX , i wcY , i osX , i osY The analytical value of the energy absorption of each component at the stage eE obs (k) is considered to be a value close to the amount of energy absorbed by each component when the earthquake for which earthquake information was obtained occurred. Therefore, the incremental step i wcX , i wcY , i osX , i osY Analytical value of the energy absorption of each member corresponding to eE wcX (i wcX ,k), eE wcY (i wcY ,k), eE osX (i osX ,k), eE osY (i osY , k), the estimated energy absorption amount of each component eE obs (k) is obtained, and the estimated energy absorption amount of each component is calculated as eE obsBased on (k), the degree of damage is calculated by comparing with the damage judgment threshold, thereby evaluating the degree of damage to each component constituting the building 10, and the soundness of the building 10 can be judged. In this way, by estimating the presence or absence of damage to the components that make up the building 10 and the extent of that damage, damage assessment can be performed for each component, allowing for a highly accurate and reliable assessment of the soundness of the building 10. Furthermore, in the above-described configuration, although damage assessment can be performed for each component, there is no need to provide a sensor for each component, and therefore a large number of sensors are not required. Therefore, it is possible to provide a building soundness evaluation system 1 that can accurately determine soundness with a simple configuration.

[0037] The analysis unit 21 performs a static incremental analysis on each of the story collapse model M1, in which parameters are set so that the building 10 collapses in a story relative to the three-dimensional frame model M (M1, M2), and the overall collapse model M2, in which parameters are set so that the building 10 collapses in a whole relative to the three-dimensional frame model M (M1, M2), and calculates an analysis value sE of the energy absorption amount of each story for each incremental step. wcX (i,j), sE wcY (i,j), sE osX (i,j), sE osY (i, j) and the analytical value eE of the energy absorption of each component wcX (i, k), eE wcY (i, k), eE osX (i, k), eE osY (i, k) is calculated and recorded in the analysis result recording unit 27, and the incremental step identification unit 24 calculates the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 recorded in the analysis result recording unit 27. wcX (i,j), sE wcY (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), sE osY For each combination of (i,j), the analytical value sE of the energy absorption of each layer in the layer collapse model M1 is calculated for each layer. wcX (i,j), sE wcY(i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), sE osY The sum of (i,j) and the estimated energy absorption of each layer sE obsX (j), sE obsY (j) and calculate the sum of the differences over all layers e X , e Y The minimum difference combination, which is the combination that minimizes the difference, is selected as the minimum difference analytical value of the energy absorption amount of each story, and the analytical value sE of the energy absorption amount of each story in the story collapse model M1 in the minimum difference combination is wcX (i,j), sE wcY (i wcY ,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), sE osY (i osY ,j) increment step i in the layer-collapse model M1 wcX , i wcY and the incremental step i in the globally collapsed model M2 osX , i osY respectively, the first differential minimum incremental step i wcX , i wcY and the second difference minimum incremental step i osX , i osY The soundness determination unit 25 identifies the first difference minimum increment step i wcX , i wcY and the second difference minimum incremental step i osX , i osY Based on this, the soundness of the building 10 is judged. According to this configuration, a static incremental analysis is performed on each of the story collapse model M1, in which parameters are set so that the building 10 collapses in a story relative to the three-dimensional frame model M (M1, M2), and the overall collapse model M2, in which parameters are set so that the building 10 collapses in a whole relative to the three-dimensional frame model M (M1, M2). wcX (i,j), sE wcY(i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), sE osY For each combination of (i,j), the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 for each layer 11 wcX (i,j), sE wcY (i,j) and the analytical value sE of the energy absorption amount of each story in the total collapse type model M2 osX (i,j), sE osY The sum of (i,j) and the estimated energy absorption of each layer sE obsX (j), sE obsY (j) and calculate the sum of these differences over all layers 11 e X , e Y The minimum difference combination, which is the combination that minimizes the difference, is selected as the minimum difference analysis value of the energy absorption amount of each story. Then, the incremental step i in the story collapse model M1 corresponding to the minimum difference combination selected in this way is wcX , i wcY and the incremental step i in the globally collapsed model M2 osX , i osY respectively, the first differential minimum incremental step i wcX , i wcY , and the second differential minimum incremental step i osX , i osY Identify as: Here, the layer collapse and the global collapse are respectively determined by the static increment analysis at the increment step i of the first difference minimum identified as above. wcX , i wcY and the second difference minimum incremental step i osX , i osY When the state of the earthquake that has progressed up to the present is combined, the amount of energy absorbed by each layer is estimated as the amount of energy absorbed when the earthquake occurred for which earthquake information was obtained. osX (i,j), sE osY (i,j) is close to the first difference. wcX , i wcY and the second difference minimum incremental step i osX , i osYcan be regarded as the progress of each of the layer collapse and the total collapse in the earthquake for which earthquake information was obtained. The incremental step i of the first difference minimum identified in this way wcX , i wcY and the second difference minimum incremental step i osX , i osY By determining the soundness of the building 10 based on this, it is possible to estimate a collapse state that is closer to the damage that would occur to the building 10 due to an actual earthquake load, and to evaluate the soundness of the building 10 with greater accuracy.

[0038] In addition, the soundness determination unit 25 determines, for each component, the increment step i wcX , i wcY The analytical value eE of the energy absorption amount of each member in the story collapse model M1 corresponding to wcX (i wcX ,k), eE wcY (i wcY ,k) and the second differential minimum incremental step i osX , i osY The analytical value eE of the energy absorption of each member in the total collapse type model M2 corresponding to osX (i osX ,k), eE osY (i osY , k) eE obs (k) and use this as the estimated energy absorption value eE obs (k) The degree of damage is calculated by comparing with the damage judgment threshold. The incremental step i of the first difference minimum identified above wcX , i wcY The analytical value eE of the energy absorption amount of each member in the story collapse model M1 corresponding to wcX (i wcX ,k), eE wcY (i wcY ,k) and the second differential minimum incremental step i osX , i osY The analytical value eE of the energy absorption amount of each member in the total collapse type model M2 corresponding to osX (i osX ,k), eE osY (i osY, k) are calculated. As already explained, the incremental step i wcX , i wcY and the second difference minimum incremental step i osX , i osY is the progress of each of the story collapse and the total collapse in the earthquake for which earthquake information was obtained, so the increment step i wcX , i wcY and the second difference minimum incremental step i osX , i osY The analytical value eE of the energy absorption of each component corresponding to each of the above wcX (i wcX ,k), eE wcY (i wcY ,k), eE osX (i osX ,k), eE osY (i osY , k) eE obs (k) is considered to be a value close to the energy absorbed by each component when the earthquake for which earthquake information was obtained occurred. This sum is the estimated energy absorption amount of each component eE obs As (k), by judging the soundness of the building 10 by comparing each component with the damage judgment threshold, the evaluation of the soundness of the building 10 can be performed with higher accuracy.

[0039] (First Modification of the Embodiment) The soundness assessment system 1 of the present invention is not limited to the above-described embodiment explained with reference to the drawings, and various other modified examples are conceivable within the technical scope thereof. For example, in the above embodiment, when the direction in which the earthquake force acts is approximately along the X direction, the incremental step identification unit 24 and the soundness determination unit 25 may perform analysis only in the X direction without performing analysis in the Y direction. In this case, the identification part of the incremental step is the story energy difference e x Calculate only the layer energy difference e in the Y direction when loading in the equation (2) YIn addition, the soundness determination unit 25 does not need to calculate the estimated energy absorption amount eE of each member in formula (3). obs When calculating (k), the analytical value eE of the energy absorption of each component in the X direction wcX (i, k), eE osX Add only (i, k) and calculate the analytical value eE of the energy absorption of each component in the Y direction. wcY (i, k), eE osY (i,k) is not used. The same is true when the direction of the seismic force is roughly along the Y direction.

[0040] (Second Modification of the Embodiment) Alternatively, in cases where it is known in advance that story collapse will dominate over overall collapse due to the structure of the building, the building health assessment system 1 may be configured to operate by targeting only the story collapse model M1. In this case, the analysis unit 21 performs a static incremental analysis on the story collapse model M1 in which parameters are set so that the building 10 collapses in a story of the three-dimensional frame model M (M1), and calculates the analysis value sE of the energy absorption amount of each story for each incremental step. wcX (i,j), sE wcY (i, j) and the analytical value eE of the energy absorption of each component wcX (i, k), eE wcY (i, k) is calculated and recorded in the analysis result recording unit 27. Next, the energy absorption estimation unit 23 estimates the energy absorption amount sE obsX (j), sE obsY Calculate (j). The incremental step identification unit 24 then calculates the analysis value sE of the energy absorption amount of each layer in the layer collapse model M1 recorded in the analysis result recording unit 27. wcX (i,j), sE wcY For each of (i,j), the analytical value sE of the energy absorption of each story in the story collapse model M1 is wcX (i,j), sE wcY (i,j) and the estimated energy absorption amount of each layer sE obsX(j), sE obsY (j) and calculate the sum of the differences over all layers e X , e Y The analytical value of the energy absorption amount that minimizes is selected as the minimum analytical value of the difference of the energy absorption amount of each story, and the corresponding incremental step i in the story collapse model M1 is wcX , i wcY The first difference is the smallest incremental step i wcX , i wcY Identify as: Furthermore, the soundness determination unit 25 determines, for each component, the increment step i wcX , i wcY The analytical value eE of the energy absorption amount of each member in the story collapse model M1 corresponding to wcX (i, k), eE wcY Sum of (i,k) eE obs (k) and use this as the estimated energy absorption value eE obs (k) The degree of damage is calculated by comparing with the damage judgment threshold.

[0041] (Third Modification of the Embodiment) Furthermore, in cases where it is known in advance that overall collapse is dominant over story collapse due to the structure of the building, the building health assessment system 1 may be configured to operate only with the overall collapse model M2 as the target. In this case, the analysis unit 21 performs a static incremental analysis on the total collapse type model M2 in which parameters are set so that the building 10 collapses in its entirety with respect to the three-dimensional frame model M (M2), and calculates the analysis value sE of the energy absorption amount of each story for each incremental step. osX (i,j), sE osY (i, j) and the analytical value eE of the energy absorption of each component osX (i, k), eE osY (i, k) is calculated and recorded in the analysis result recording unit 27. Next, the energy absorption estimation unit 23 estimates the energy absorption amount sE obsX (j), sE obsY Calculate (j). The incremental step identification unit 24 then calculates the analysis value sE of the energy absorption amount of each layer in the total collapse type model M2 recorded in the analysis result recording unit 27. osX (i,j), sE osY For each of (i,j), the analytical value sE of the energy absorption of each story in the total collapse model M2 is osX (i,j), sE osY (i,j) and the estimated energy absorption amount of each layer sE obsX (j), sE obsY (j) and calculate the sum of the differences over all layers e X , e Y The analytical value of the energy absorption amount that minimizes is selected as the minimum analytical value of the difference of the energy absorption amount of each story, and the corresponding incremental step i in the total collapse type model M2 is osX , i osY The second difference is the smallest incremental step i osX , i osY Identify as: Furthermore, the soundness determination unit 25 determines, for each component, the second difference minimum incremental step i osX , i osY The analytical value eE of the energy absorption amount of each member in the total collapse type model M2 corresponding to osX (i, k), eE osY Sum of (i,k) eE obs (k) and use this as the estimated energy absorption value eE obs (k) The degree of damage is calculated by comparing with the damage judgment threshold.

[0042] In this manner, in the above embodiment, a plurality of models M1, M2 are used, and the static incremental analysis is performed so that each of the plurality of models has analysis values ​​in a plurality of directions X and Y, but as shown in the above first to third modified examples, the static incremental analysis may be performed so that two analysis values ​​are obtained. Alternatively, for example, the above first and second modified examples may be combined, and the static incremental analysis may be performed so that, for example, a single analysis value is obtained for only one direction of the story collapse model, or the first and third modified examples may be combined, and the static incremental analysis may be performed so that a single analysis value is obtained for only one direction of the global collapse model. In addition, without departing from the spirit of the present invention, it is possible to select and discard the configurations given in the above embodiments and modifications, or to change them to other configurations as appropriate. [Explanation of symbols]

[0043] 1. Soundness assessment system 22. Earthquake information recording section 10 Building 23 Energy absorption estimation section Identification section with 11 layers and 24 incremental steps 12 Sensor 25 Health judgement section 16 Pillar 27 Analysis Results Recording Section 17 Beam M Three-dimensional frame model 19-panel M1 layer-collapse model 21 Analysis section M2 Total collapse model

Claims

1. A soundness evaluation system for diagnosing and evaluating the soundness of a building, comprising: an analysis unit that performs a static incremental analysis in advance using a three-dimensional frame model configured to correspond to the building and including columns and beams, calculates an analysis value of the energy absorption amount of each story and an analysis value of the energy absorption amount of each member including the columns and beams for each incremental step, which is a step of increasing a load in the analysis, and records the calculated values ​​in an analysis result recording unit; an earthquake information recording unit that records earthquake information obtained from a sensor installed in the building; an energy absorption estimation unit that calculates a story shear force and a story displacement of each story based on the earthquake information and the weight of each story of the building, and calculates an estimated value of the energy absorption amount of each story based on the story shear force and the story displacement; an incremental step identification unit that selects a minimum difference analytical value of the energy absorption amount of each layer that has a minimum difference from the estimated value of the energy absorption amount of each layer from the analytical values ​​of the energy absorption amount of each layer recorded in the analysis result recording unit, and identifies the incremental step corresponding to the minimum difference as the incremental step with the smallest difference; a soundness determination unit that obtains an estimate of the energy absorption amount of each component from the analysis value of the energy absorption amount of each component corresponding to the incremental step with the smallest difference, compares the estimate of the energy absorption amount of each component with a damage determination threshold value set for each component to calculate a degree of damage, and determines the soundness of the building based on the degree of damage of each component; A building health assessment system comprising:

2. the analysis unit performs a static incremental analysis on each of a story collapse model in which parameters are set so that the building will undergo a story collapse with respect to the three-dimensional frame model, and a total collapse model in which parameters are set so that the building will undergo a total collapse with respect to the three-dimensional frame model, calculates an analysis value of the energy absorption amount of each of the stories and an analysis value of the energy absorption amount of each of the members for each incremental step, and records them in the analysis result recording unit; The incremental step identification unit calculates, for each combination of the analysis value of the energy absorption amount of each layer in the layer collapse type model and the analysis value of the energy absorption amount of each layer in the global collapse type model recorded in the analysis result recording unit, a difference between the sum of the analysis value of the energy absorption amount of each layer in the layer collapse type model and the analysis value of the energy absorption amount of each layer in the global collapse type model and the estimated value of the energy absorption amount of each layer, and selects a minimum difference combination that is a combination in which the sum of the differences in all layers is minimum as a minimum difference analysis value of the energy absorption amount of each layer, and identifies the incremental step in the layer collapse type model and the incremental step in the global collapse type model corresponding to the analysis value of the energy absorption amount of each layer in the layer collapse type model and the analysis value of the energy absorption amount of each layer in the global collapse type model in the minimum difference combination as a first minimum difference incremental step and a second minimum difference incremental step, respectively; The building health assessment system according to claim 1, characterized in that the health assessment unit assesses the health of the building based on the increment step of the first minimum difference and the increment step of the second minimum difference.

3. The building health assessment system described in claim 2, characterized in that the health assessment unit calculates, for each component, the sum of the analytical value of the energy absorption amount of each component in the story collapse type model corresponding to the incremental step with the smallest first difference and the analytical value of the energy absorption amount of each component in the total collapse type model corresponding to the incremental step with the smallest second difference, and uses this as an estimate of the energy absorption amount of each component, compares it with the damage assessment threshold, and calculates the degree of damage.

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