A structure vulnerability determination method, storage medium and device

Abstract

The application relates to a structure vulnerability determination method, comprising the following steps: in a plane failure mode, strength factors of the plane failure mode are determined through cyclic iteration calculation according to preset parameters in the plane; in an out-of-plane failure mode, strength factors of the out-of-plane failure mode are determined through calculation according to preset parameters out of the plane; the calculation results are compared, when the calculation results are the same, the calculated strength factors are taken as target strength factors of the structure, otherwise, the preset parameters in the plane and out of the plane are adjusted until the calculation results are equal. The application also provides a storage medium and a structure vulnerability determination device, and the structure vulnerability determination method, the storage medium and the device can expand the failure mode to the out-of-plane failure, and are suitable for the real stress state of most nuclear power plant rooms.

Description

Technical Field

[0001] This invention belongs to the field of probabilistic safety analysis of earthquake disasters, and specifically relates to a method, storage medium and device for determining the vulnerability of structures. Background Technology

[0002] Seismic PSA (Probabilistic Safety Analysis) is a probabilistic safety analysis conducted on the seismic hazards of nuclear power plants. By assessing the overall risk to nuclear power plants under earthquakes of varying intensities, it identifies potential weaknesses in the seismic design of nuclear power plants, thus providing comprehensive insights into seismic risk. Vulnerability analysis is a key component of seismic PSA analysis and forms the basis for quantitative calculations.

[0003] The seismic vulnerability of a structure is defined as the conditional failure probability of the structure corresponding to a certain seismic acceleration value (such as peak ground acceleration, PGA). Seismic vulnerability is usually expressed by the median value of seismic resistance and the logarithmic standard deviation of its randomness and uncertainty.

[0004] However, existing methods for determining the vulnerability of structures do not comprehensively consider in-plane and out-of-plane failure modes, resulting in inaccurate calculation results for strength factors. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method, storage medium, and device for determining the vulnerability of structures, thereby solving the problem that the strength factor calculation method cannot consider out-of-plane failure modes of structures, resulting in inaccurate calculation results.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a method for determining the vulnerability of a structure, comprising the steps of: determining the in-plane failure mode strength factor by iteratively calculating based on preset in-plane parameters under in-plane failure modes; determining the out-of-plane failure mode strength factor by calculating based on preset out-of-plane parameters under out-of-plane failure modes; comparing the calculation results, and when the calculation results are the same, taking the calculated strength factor as the target strength factor of the structure; otherwise, adjusting the preset in-plane and out-of-plane parameters until the calculation results are equal.

[0007] Furthermore, the in-plane failure modes include in-plane diagonal shear failure mode, in-plane bending failure mode and / or in-plane shear failure mode, and the out-of-plane failure modes include out-of-plane bending failure mode and / or out-of-plane shear failure mode.

[0008] Furthermore, the in-plane preset parameters include one or a combination of several of the following: in-plane load reinforcement ratio, concrete compressive bearing capacity, load reinforcement yield strength, structure cross-sectional geometric parameters, and axial pressure; the out-of-plane preset parameters include one or a combination of several of the following: out-of-plane load reinforcement ratio, concrete compressive bearing capacity, load reinforcement yield strength, structure cross-sectional geometric parameters, and axial pressure.

[0009] Furthermore, when the structure is a wall with openings, the step of determining the in-plane failure mode strength factor by iterative calculation based on preset parameters in the plane under in-plane failure modes further includes the following steps: dividing the wall into multiple sections according to the distribution of openings; calculating the minimum resistance value of each section of the wall according to preset parameters in the plane and summing the results, and using the summation result as the resistance value of the wall; determining whether the resistance value of the wall and the preset strength factor satisfy the set relationship, and if they satisfy, determining the preset strength factor as the strength factor of the in-plane failure mode, and if they do not satisfy, adjusting the preset strength factor until the set relationship is satisfied.

[0010] Furthermore, the step of calculating and summing the minimum resistance values ​​of each wall section based on preset parameters in the plane, and using the summation result as the resistance value of the wall section, further includes: determining the resistance values ​​against diagonal shear failure mode, bending failure mode, and shear-friction failure mode in the plane based on preset parameters in the plane; and setting the minimum value among the resistance values ​​against diagonal shear failure mode, bending failure mode, and shear-friction failure mode in the plane as the minimum resistance value of each wall section.

[0011] Furthermore, the section resistance is calculated under the diagonal shear failure mode, the in-plane bending failure mode, and the in-plane shear failure mode, respectively. The strength factor is then calculated using the section resistance and compared. The smaller value among the three is taken as the strength factor under the in-plane failure mode.

[0012] Furthermore, the strength factors calculated under the out-of-plane bending failure mode and the strength factors calculated under the out-of-plane shear failure mode are compared, and the smaller value is taken as the strength factor under the out-of-plane failure mode.

[0013] Furthermore, the structure is a wall with a rectangular cross-section.

[0014] The present invention also provides a storage medium storing a computer program thereon, characterized in that: when the computer program is executed by a processor, it implements a method for determining the vulnerability of a structure.

[0015] This invention also provides a structure vulnerability determination device, comprising: an in-plane calculation module, used to iteratively calculate and determine the strength factor of an in-plane failure mode based on preset in-plane parameters under in-plane failure modes; an out-of-plane calculation module, used to calculate and determine the strength factor of an out-of-plane failure mode based on preset out-of-plane parameters under out-of-plane failure modes; and a judgment module, used to determine whether the strength factor of the in-plane failure mode is equal to the strength factor of the out-of-plane failure mode. If they are equal, the strength factor of either the in-plane or out-of-plane failure mode is determined as the target strength factor of the wall. If they are not equal, the in-plane load reinforcement ratio and the out-of-plane load reinforcement ratio are adjusted, and the in-plane calculation module, the out-of-plane calculation module, and the judgment module are executed sequentially.

[0016] The advantages of this invention are: by implementing the calculation function through two-layer loops, it overcomes the problem that the original seismic PSA analysis only considers in-plane failure when calculating the vulnerability of nuclear power plant walls, and extends the failure mode to out-of-plane failure, which is applicable to the actual stress state of most nuclear power plant buildings and ensures the accuracy of strength factor calculation. Attached Figure Description

[0017] Figure 1 This is a flowchart of the steps in a method for determining the vulnerability of a structure according to the present invention;

[0018] Figure 2 This is a flowchart of the sub-steps of step S1 in this invention;

[0019] Figure 3 This is a flowchart illustrating the calculation process of a method for determining the vulnerability of a structure in this invention.

[0020] Figure 4 This is a flowchart illustrating the calculation of in-plane failure modes in a method for determining the vulnerability of a structure according to the present invention. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0022] Commonly used methods for calculating the vulnerability of structures include CDFM (Conservative Deterministic Failure Margin Method) and SOV (Separation of Variables Method). The SOV method, based on the first-order second-moment theory of reliability analysis, innovatively proposes the concept of a double-log probability distribution for cognitive and stochastic uncertainties, applying it to the vulnerability calculation of SSCs (structures, equipment, and components) in nuclear power plants. Structures are the most important maintenance structures in a nuclear power plant, directly affecting the plant's safety under seismic loads. Therefore, the accuracy of the vulnerability calculation method for structures is crucial to the overall seismic PSA analysis results.

[0023] Relevant literature on vulnerability calculations for nuclear power plant structures includes the paper "Seismic Margin Assessment of Prestressed Containment Structures of China's CPR1000 Pressurized Water Reactor Nuclear Power Plant Based on Seismic Probabilistic Safety Analysis (S-PSA)" published by Li Pengfei of Shenzhen CGN Engineering Design Co., Ltd. This paper compares the differences between the structural vulnerability analysis (FA) method based on seismic probabilistic safety vulnerability and the conservative deterministic assessment method (CDFM) in calculating the high confidence low probability of failure (HCLPF) value of containment structures. The calculation only considers in-plane shear stress failure based on a circular cross-section to calculate the strength factor. This method is not applicable to rectangular low-rise concrete shear wall members. Considering that stress failure is not an internal force failure, it is no longer suitable for variable cross-section walls. Furthermore, the containment structure does not bear out-of-plane loads, making it unsuitable for out-of-plane failure walls.

[0024] Existing methods for calculating the vulnerability of structures using the separation of variables method require consideration of multiple factors to correct for the median seismic capacity, including the strength factor (fs), elastic energy absorption factor (fμ), and structural response factor (fRS). The strength factor represents the ratio of structural resistance to effect under seismic loading. Existing studies have limited the strength factor (fs) to in-plane failure modes of ordinary concrete shear walls, including in-plane diagonal shear failure, in-plane bending failure, and in-plane shear-friction failure. However, this method has certain limitations: First, due to process layout constraints, most nuclear island concrete shear walls are low-rise, resulting in more complex failure modes, increased wall brittleness, and smaller deformation. Second, the outer walls of nuclear island concrete plant shear walls are often deeply embedded and significantly affected by earth pressure. Out-of-plane failure modes caused by earth pressure (including out-of-plane bending failure and in-plane shear failure) are non-negligible failure modes. Third: How to introduce out-of-plane failure modes into the calculation method based on in-plane failure to make the strength factor calculation reasonable, the theoretical basis correct, and applicable to nuclear power plant structures with more complex stresses; Fourth: The method is complex in iterative calculation, how to make the method specific and programmatic so that it can be directly applied.

[0025] like Figure 1 As shown, the method for determining the vulnerability of a structure provided by the present invention includes the following steps:

[0026] S1, In the in-plane failure mode, the intensity factor of the in-plane failure mode is determined by iterative calculation based on the preset parameters in the plane;

[0027] Specifically, in-plane failure modes include in-plane diagonal shear failure mode, in-plane bending failure mode, and / or in-plane shear failure mode. The in-plane preset parameters include one or a combination of in-plane load reinforcement ratio, concrete compressive bearing capacity, load reinforcement yield strength, structure cross-sectional geometric parameters, and axial pressure. The strength factor under the in-plane failure mode can be calculated using the in-plane preset parameters.

[0028] It should be noted that the strength factor of the in-plane failure mode is the inner section resistance / inner section internal force. The inner section resistance needs to be calculated based on the in-plane failure mode and the preset parameters in the plane, while the inner section internal force is known.

[0029] Furthermore, the preset parameters in the plane also include a first concrete coefficient and a second concrete coefficient. The resistance value against the diagonal shear failure mode in the plane is determined based on the axial pressure, the load reinforcement ratio, the first concrete coefficient, and the second concrete coefficient.

[0030] Furthermore, the in-plane preset parameters also include a third concrete coefficient, which determines the resistance value against in-plane bending failure mode based on the load reinforcement ratio and the third concrete coefficient.

[0031] Let's take a specific example to illustrate: Calculation of resistance under three in-plane failure modes:

[0032] The resistance values ​​against in-plane diagonal shear failure modes include the median performance of shear walls under in-plane diagonal shear failure modes. The calculation formula is:

[0033]

[0034] in, and The formulas for calculating the resistance of concrete and steel reinforcement when a shear wall fails under in-plane diagonal shear are as follows:

[0035]

[0036]

[0037] in, The vertical axial force borne by the shear wall under seismic loading is calculated using the following formula:

[0038]

[0039] and These represent the vertical axial forces borne by the shear wall under its own weight and under seismic loads, respectively.

[0040] In the formula: α1 is the first concrete coefficient: 384833.8 for C60 ordinary concrete, and 380082.8 for C50 and below ordinary concrete; α2 is the second concrete coefficient: 64576.6 for C60 ordinary concrete, and 63779.3 for C50 and below ordinary concrete; f cu,kis the standard value of the compressive strength of a concrete cube (Pa); k is a coefficient, which is related to the thickness of the component and the grade of concrete, specifically:

[0041] C60 ordinary concrete, component thickness t n If the thickness is less than 914.4 mm, then k = 1.4291; component thickness t n If the diameter is ≥914.4mm, then k=1.6673;

[0042] C50 ordinary concrete, component thickness t n If the thickness is less than 914.4 mm, then k = 1.4563; component thickness t n If the diameter is ≥914.4mm, then k = 1.6990;

[0043] C45 ordinary concrete, component thickness t n If the thickness is less than 914.4 mm, then k = 1.4845; component thickness t n If the diameter is ≥914.4mm, then k=1.7319;

[0044] C40 ordinary concrete, component thickness t n If the thickness is less than 914.4 mm, then k = 1.4845, and the component thickness t n If the diameter is ≥914.4mm, then k=1.7319;

[0045] h w The height of the wall (m); l w t is the length of the wall (m); n The wall thickness is in meters (m). This represents the median tensile strength of the reinforcing steel (Pa). ρ represents the median performance (N) of the shear wall under diagonal shear failure mode; se The effective reinforcement ratio for a shear wall to resist diagonal shear failure is calculated using the following formula:

[0046] ρ se =Aρ v内 +Bρ h ;

[0047] Where, ρ v内 The reinforcement ratio of the shear wall to resist in-plane loads in the vertical direction is related to R. op The relationship between ρ and the vertical reinforcement ratio of the shear wall is: v内 =(1-R) op )ρ v ;ρ h This represents the horizontal reinforcement ratio of the shear wall; A and B are coefficients related to the geometric dimensions of the shear wall, and their specific values ​​are determined as follows:

[0048] when At time: A = 1; B = 0

[0049] when hour:

[0050] when At time: A = 0; B = 1

[0051] The resistance to in-plane bending failure includes the median performance of shear walls under the shear failure mode induced by in-plane bending. Calculation formula:

[0052]

[0053] in, The median in-plane bending capacity of the shear wall is calculated using the following formula:

[0054]

[0055]

[0056]

[0057] In the formula: ρ v内 α3 is the reinforcement ratio of the shear wall to resist in-plane loads in the vertical direction; α3 is the third concrete coefficient: 0.81 for C60 ordinary concrete and 0.80 for C50 and below ordinary concrete. N represents the median performance of the shear wall under the shear failure mode caused by in-plane bending.

[0058] In this failure mode, the resistance value against in-plane shear friction failure mode is determined based on the load reinforcement ratio and the geometric parameters of the structure section.

[0059] The resistance value against in-plane shear-friction failure mode includes the median performance of the shear wall under shear-friction failure mode. Calculation formula:

[0060] if: but:

[0061]

[0062] if: but:

[0063]

[0064] In the formula: K1 is a coefficient taken as 0.1.α3.kf cu,k The smaller of 5.517 MPa and K2 is 0.3; K3 is 16.552 MPa; A c The cross-sectional area of ​​the wall (m²) 2 ); N represents the median performance of the shear wall under the shear-friction failure mode.

[0065] It should be noted that the intensity factor f used in the above calculations... s The preset strength factor has an initial value of 1. If the wall's resistance value and the preset strength factor satisfy the set relationship, the preset strength factor is determined as the strength factor for the in-plane failure mode. If the wall's resistance value and the preset strength factor do not satisfy the set relationship, the preset strength factor is adjusted until the set relationship is satisfied.

[0066] It should be noted that the relationship is defined as the product of the in-plane force under seismic action and the strength factor equaling the resistance value of the wall, such as the in-plane shear force V under seismic action. EQ With intensity factor f s The product of these values ​​equals the resistance value of the wall.

[0067] Based on the above three formulas, the cross-sectional resistance can be calculated under the diagonal shear failure mode, the in-plane bending failure mode, and the in-plane shear failure mode, respectively. Then, the strength factor can be calculated using the cross-sectional resistance, and the values ​​can be compared. The smaller value among the three is taken as the strength factor under the in-plane failure mode.

[0068] S2, In the out-of-plane failure mode, the intensity factor of the out-of-plane failure mode is calculated and determined according to the preset out-of-plane parameters;

[0069] Specifically, out-of-plane failure modes include out-of-plane bending failure mode and / or out-of-plane shear failure mode, and out-of-plane preset parameters include one or a combination of out-of-plane load reinforcement ratio, concrete compressive bearing capacity, load reinforcement yield strength, structure cross-sectional geometric parameters, and axial pressure.

[0070] It should be noted that the strength factor of the out-of-plane failure mode is the ratio of the external section resistance to the external section internal force. The external section resistance needs to be calculated based on the out-of-plane failure mode and the preset out-of-plane parameters, while the external section internal force is known.

[0071] To illustrate with a specific example, the formula for calculating the strength factor of the out-of-plane bending failure mode is as follows:

[0072]

[0073] in, and The out-of-plane bending moment and resistance borne by the shear wall under seismic loading are respectively calculated using the following formulas:

[0074]

[0075]

[0076] in: The area of ​​the reinforcing steel bar resisting out-of-plane bending; ρ v R is the vertical reinforcement ratio of the wall; op d represents the percentage of out-of-plane bending load resisted by the vertical reinforcement of the wall in each cycle; op1 The effective distance from the outer layer of reinforcing steel to the wall surface to resist out-of-plane bending; d op2 The effective distance between the inner layer of reinforcing bars and the wall surface to resist out-of-plane bending; R S The percentage of the outermost layer of vertical reinforcing bars; t w h is the wall thickness. w The height of the wall; This represents the median yield strength of the reinforcing steel. P represents the median compressive strength of concrete. op1 P represents the minimum value of the trapezoidal earth pressure load. op2 This represents the maximum value of the trapezoidal earth pressure load.

[0077] Formula for calculating the intensity factor of out-of-plane shear failure mode:

[0078]

[0079] in, and These represent the out-of-plane bending moment and resistance borne by the shear wall under seismic loading, respectively.

[0080] The calculation formulas are as follows:

[0081]

[0082]

[0083] Where: ρ s The shear reinforcement ratio of the wall is calculated using the following formula: ρ s =R op ρ h +ρ v ;d op The effective distance from the out-of-plane shear reinforcement to the wall surface; h w The height of the wall; This represents the median yield strength of the reinforcing steel. P represents the median compressive strength of concrete. op1 P represents the minimum value of the trapezoidal earth pressure load. op2 This represents the maximum value of the trapezoidal earth pressure load.

[0084] Based on the above two formulas, the strength factors calculated under the out-of-plane bending failure mode and the strength factors calculated under the out-of-plane shear failure mode are compared, and the smaller value is taken as the strength factor under the out-of-plane failure mode.

[0085] S3. Compare the calculation results. If the calculation results are the same, use the calculated strength factor as the target strength factor of the structure. Otherwise, adjust the in-plane preset parameters and out-of-plane preset parameters until the calculation results are equal.

[0086] Specifically, after obtaining the strength factors for both the out-of-plane failure mode and the smaller strength factor for the in-plane failure mode, the two strength factors are compared. If the results are equal, one of them is selected as the target strength factor for the structure. If the results are inconsistent, the preset parameters for both the in-plane and out-of-plane failure modes are adjusted, specifically the ratio of in-plane load reinforcement and the ratio of out-of-plane load reinforcement, until the strength factors for the in-plane and out-of-plane failure modes calculated in steps S1 and S2 are equal.

[0087] It should be noted that the total reinforcement = reinforcement against in-plane loads + reinforcement against out-of-plane loads; the ratio of reinforcement against in-plane loads to the total reinforcement + the ratio of reinforcement against out-of-plane loads to the total reinforcement = 1.0. In this embodiment, the initial ratio of reinforcement against out-of-plane loads to the total reinforcement is Rop = 0.8.

[0088] Furthermore, since there are usually openings in the wall, in order to solve the problem of uniformly calculating the wall factor under different failure modes of different wall panels caused by wall openings, step S1 also includes the following sub-steps:

[0089] S11, the wall is divided into multiple sections according to the distribution of openings in the wall;

[0090] S12, calculate the minimum resistance value of each wall section according to the preset parameters in the plane and sum them up, and use the summation result as the resistance value of the wall;

[0091] S13, determine whether the resistance value of the wall and the preset strength factor meet the set relationship. If they meet, the preset strength factor is determined as the strength factor of the in-plane failure mode. If they do not meet, the preset strength factor is adjusted to meet the set relationship.

[0092] Furthermore, step S12 also includes the following steps:

[0093] Based on preset parameters in the plane, determine the resistance values ​​against diagonal shear failure mode, bending failure mode, and shear-friction failure mode in the plane, respectively.

[0094] The minimum value among the resistance values ​​against in-plane diagonal shear failure mode, in-plane bending failure mode, and in-plane shear-friction failure mode is set as the minimum resistance value for each wall section.

[0095] In this embodiment, the existence of a large opening in the nuclear island and the impact of different failure modes of the wall segments on the strength factor calculation were fully considered. A reasonable iterative calculation process was developed to ensure that a uniform strength factor can still be calculated even with multiple different wall segments.

[0096] Furthermore, the structure consists of rectangular cross-section walls.

[0097] The present invention also provides a storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of a method for determining the vulnerability of a structure.

[0098] It should be noted that the storage medium shown in this application can be a computer-readable signal medium or a storage medium, or any combination of the two. The storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, the storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, the storage medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The storage medium may also be any computer-readable medium other than a storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0099] The present invention also provides a device for determining the vulnerability of a structure, comprising:

[0100] The in-plane calculation module is used to determine the intensity factor of the in-plane failure mode by iteratively calculating based on preset parameters in the plane.

[0101] The out-of-plane calculation module is used to calculate and determine the intensity factor of the out-of-plane failure mode based on preset out-of-plane parameters under the out-of-plane failure mode.

[0102] The judgment module is used to determine whether the strength factor of the in-plane failure mode is equal to the strength factor of the out-of-plane failure mode. If they are equal, the strength factor of the in-plane failure mode or the strength factor of the out-of-plane failure mode is determined as the target strength factor of the wall. If they are not equal, the in-plane load reinforcement ratio and the out-of-plane load reinforcement ratio are adjusted, and the in-plane calculation module, the out-of-plane calculation module and the judgment module are executed in sequence.

[0103] As can be seen from the above embodiments, the beneficial effects of the present invention are as follows:

[0104] 1. Overcoming the problem that the original seismic PSA analysis only considered in-plane failure when calculating the vulnerability of nuclear power plant walls, the failure mode is extended to out-of-plane failure, which is applicable to the actual stress state of most nuclear power plant buildings and ensures the accuracy of strength factor calculation;

[0105] 2. This application fully considers the large openings in the nuclear island and the impact of different failure modes of the wall segments on the strength factor calculation after dividing the wall into different wall segments; a reasonable iterative calculation process has been developed to ensure that even with different wall segments, a uniform strength factor can still be calculated, without affecting the subsequent PSA calculation of the entire plant. At the same time, this method improves the applicability of the vulnerability calculation of the structure.

[0106] 3. Regarding the load-bearing capacity of wall reinforcement, an innovative method is proposed to consider the load reinforcement ratio in a cyclic iteration. This fully implements the idea of ​​avoiding design shortcomings in the design process, fully assessing and improving the seismic vulnerability analysis of the wall's resistance, and realizes a reasonable calculation method for strength factors that consider different failure modes, thus ensuring the reliability of the calculation results.

[0107] 4. A specific calculation method for the strength factor corresponding to the out-of-plane failure mode was completed. This calculation method conforms to the actual stress and design parameter characteristics of the nuclear island shear wall, concretizes the basic theory, and ensures the usability of vulnerability analysis.

[0108] 5. All methods have achieved scientific and reasonable iterations, and the calculation process is simple and smooth, ensuring that the vulnerability analysis calculation process is programmable and easy to promote.

[0109] The device described in this invention is not limited to the embodiments described in the specific implementation. Other implementation methods derived by those skilled in the art based on the technical solution of this invention also fall within the scope of technical innovation of this invention.

Claims

1. A method for determining the vulnerability of a structure, wherein the structure is a wall with a rectangular cross-section, characterized in that, include: In the in-plane failure mode, the intensity factor of the in-plane failure mode is determined by iterative calculation based on preset parameters in the plane. The strength factor for in-plane failure modes is the ratio of in-plane section resistance to in-plane section internal force. If the wall's resistance value and the preset strength factor satisfy a set relationship, the preset strength factor is determined as the strength factor for in-plane failure modes. If the wall's resistance value and the preset strength factor do not satisfy a set relationship, the preset strength factor is adjusted until the set relationship is satisfied. The initial value of the preset strength factor is 1. The set relationship is that the product of the in-plane force under seismic action and the strength factor equals the wall's resistance value. In out-of-plane failure modes, the intensity factor of the out-of-plane failure mode is calculated and determined based on the preset out-of-plane parameters; The strength factor for out-of-plane failure modes is the ratio of out-of-plane section resistance to out-of-plane section internal forces. The calculation results are compared. When the calculation results are the same, the calculated strength factor is used as the target strength factor of the structure. Otherwise, the proportion of in-plane load reinforcement and the proportion of out-of-plane load reinforcement are adjusted until the calculation results are equal.

2. The method for determining the vulnerability of a structure as described in claim 1, characterized in that: The in-plane failure modes include in-plane diagonal shear failure mode, in-plane bending failure mode and / or in-plane shear failure mode, and the out-of-plane failure modes include out-of-plane bending failure mode and / or out-of-plane shear failure mode.

3. The method for determining the vulnerability of a structure as described in claim 1, characterized in that: The preset parameters in the plane include one or a combination of several of the following: in-plane load reinforcement ratio, concrete compressive bearing capacity, load reinforcement yield strength, structure cross-sectional geometric parameters, and axial pressure. The pre-set out-of-plane parameters include one or a combination of out-of-plane load reinforcement ratio, concrete compressive bearing capacity, load reinforcement yield strength, structure cross-sectional geometric parameters, and axial pressure.

4. The method for determining the vulnerability of a structure as described in claim 1, characterized in that: When the structure is a wall with openings, the step of determining the in-plane failure mode strength factor by iterative calculation based on preset in-plane parameters under in-plane failure modes further includes the following steps: The wall is divided into multiple sections based on the distribution of openings in the wall; The minimum resistance value of each wall section is calculated based on the preset parameters in the plane and summed. The summation result is used as the resistance value of the wall. Determine whether the wall's resistance value and the preset strength factor satisfy the set relationship. If they satisfy, the preset strength factor is determined as the strength factor for the in-plane failure mode. If they do not satisfy, the preset strength factor is adjusted to satisfy the set relationship. The set relationship is that the product of the in-plane force under seismic action and the strength factor is equal to the wall's resistance value.

5. The method for determining the vulnerability of a structure as described in claim 4, characterized in that, The step of calculating the minimum resistance value of each wall section based on preset parameters in the plane and summing the results, and using the summed result as the resistance value of the wall, also includes: Based on preset parameters in the plane, determine the resistance values ​​against diagonal shear failure mode, bending failure mode, and shear-friction failure mode in the plane, respectively. The minimum value among the resistance values ​​against in-plane diagonal shear failure mode, in-plane bending failure mode, and in-plane shear-friction failure mode is set as the minimum resistance value for each wall section.

6. The method for determining the vulnerability of a structure as described in claim 2, characterized in that: The section resistance was calculated under the diagonal shear failure mode, the in-plane bending failure mode, and the in-plane shear failure mode, respectively. The strength factor was then calculated using the section resistance and compared. The smaller value among the three was taken as the strength factor under the in-plane failure mode.

7. The method for determining the vulnerability of a structure as described in claim 2, characterized in that: The strength factors calculated under the out-of-plane bending failure mode and the strength factors calculated under the out-of-plane shear failure mode are compared, and the smaller value is taken as the strength factor under the out-of-plane failure mode.

8. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the method for determining the vulnerability of a structure as described in any one of claims 1 to 7.

9. A device for determining the vulnerability of a structure, wherein the structure is a wall with a rectangular cross-section, characterized in that, include: The in-plane calculation module is used to determine the intensity factor of the in-plane failure mode by iteratively calculating based on preset parameters in the plane. The strength factor for in-plane failure modes is the ratio of in-plane section resistance to in-plane section internal force. If the wall's resistance value and the preset strength factor satisfy a set relationship, the preset strength factor is determined as the strength factor for in-plane failure modes. If the wall's resistance value and the preset strength factor do not satisfy a set relationship, the preset strength factor is adjusted until the set relationship is satisfied. The initial value of the preset strength factor is 1. The set relationship is that the product of the in-plane force under seismic action and the strength factor equals the wall's resistance value. The out-of-plane calculation module is used to calculate and determine the intensity factor of the out-of-plane failure mode based on preset out-of-plane parameters under the out-of-plane failure mode. The strength factor for out-of-plane failure modes is the ratio of out-of-plane section resistance to out-of-plane section internal forces. The judgment module is used to determine whether the strength factor of the in-plane failure mode is equal to the strength factor of the out-of-plane failure mode. If they are equal, the strength factor of the in-plane failure mode or the strength factor of the out-of-plane failure mode is determined as the target strength factor of the wall. If they are not equal, the in-plane load reinforcement ratio and the out-of-plane load reinforcement ratio are adjusted, and the in-plane calculation module, the out-of-plane calculation module and the judgment module are executed in sequence.

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