Gravity dam post-earthquake evaluation method and system and storage medium

Abstract

The invention provides a gravity dam post-earthquake evaluation method which comprises the following steps: setting monitoring points at key parts of a gravity dam, and monitoring response parameters of each part during an earthquake; respectively carrying out one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis on the key part of the gravity dam, and calculating seismic responses in preset different levels of seismic safety states; and after an earthquake occurs, comparing the parameters obtained by the monitoring points with the calculated earthquake responses in different levels of earthquake-proof safety states, determining which level the earthquake is in, and further determining the post-earthquake safety level of the gravity dam. According to the method, whether the dam structure has earthquake damage or not and the current safety degree of the dam can be rapidly analyzed and judged through the strong vibration response data of the strong vibration monitoring points on the dam structure after an earthquake, and whether emergency measures are taken or not is determined according to the analysis result.

Description

Technical Field

[0001] The present invention relates to the field of post-earthquake detection, and in particular to a gravity dam post-earthquake evaluation method, system and storage medium. Background Art

[0002] Reservoir dams have multiple functions such as flood control, power generation, irrigation, and water supply, and are important infrastructure for the national economy. Concrete gravity dams (gravity dams for short) are one of the dam types commonly used in water conservancy and hydropower projects. Under the action of strong earthquakes, gravity dams may suffer varying degrees of damage, which directly threatens the safety and normal operation of the project. Therefore, the seismic risk analysis and assessment of gravity dams in high seismic intensity areas have always been a matter of great concern to the industry and society. The structural seismic risk probability analysis can simultaneously consider the seismic hazard of the site and the seismic vulnerability of the structure, and can quantitatively analyze the influence of uncertain factors such as seismic effects and structural resistance, scientifically and rationally evaluate the seismic risk of the structure, and provide a scientific basis for structural earthquake disaster prediction and earthquake disaster loss assessment. It is one of the frontiers and hot issues in the field of gravity dam seismic research.

[0003] In the past, the working mode of the strong vibration monitoring system of gravity dam was only to obtain data after the earthquake and conduct simple waveform analysis. It was unable to make timely and targeted evaluation of the post-earthquake response of the gravity dam and the impact of the earthquake on safety. Summary of the invention

[0004] In view of the problems existing in the prior art, a method, system and storage medium for post-seismic evaluation of a gravity dam are provided. Before an earthquake, a seismic simulation database of the dam after multiple levels of earthquakes is established, and the post-seismic evaluation is completed by comparing it with the actual earthquake monitoring parameters.

[0005] The first aspect of the present invention provides a gravity dam post-earthquake evaluation method, comprising:

[0006] Set up monitoring points at key locations of the gravity dam to monitor the response parameters of each location during an earthquake;

[0007] Conduct one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis on key parts of the gravity dam to calculate the seismic response under different levels of preset seismic safety conditions;

[0008] After an earthquake occurs, the parameters obtained from the monitoring points are compared with the calculated earthquake responses under different levels of seismic safety conditions to determine the earthquake level, and then a vulnerability analysis of the dam body is conducted to determine the post-earthquake damage level of the gravity dam.

[0009] As a preferred solution, the key parts of the gravity dam include the highest water retaining dam section and the highest overflow dam section.

[0010] As a preferred solution, the monitoring points are set at the dam crest of the dam section, the side slope of the dam slope or 2 / 3 of the dam height, the dam foundation and the free field of the river valley.

[0011] As a preferred solution, the sensor measurement direction of the monitoring points is mainly along the Pingshun River, and the monitoring points are arranged in three components: horizontally along the river, horizontally across the river, and vertically.

[0012] As a preferred solution, the one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis is performed on the key parts of the gravity dam to calculate the seismic response under different levels of preset seismic safety states, specifically including:

[0013] The highest retaining dam section and the highest overflow dam section of the gravity dam are simplified as cantilever beams. Under the action of earthquakes of different levels, one-dimensional finite element dynamic analysis is carried out to calculate the seismic response of the corresponding dam section of the gravity dam.

[0014] The highest retaining dam section and the highest overflow dam section of the gravity dam are simplified into plane problems. Two-dimensional finite element dynamic analysis is performed under different levels of earthquakes to calculate the seismic response of the corresponding dam section of the gravity dam.

[0015] Under the action of earthquakes of different levels, a three-dimensional finite element dynamic analysis is performed on the highest water retaining dam section and the highest overflow dam section of the gravity dam to calculate the seismic response of the corresponding dam section of the gravity dam;

[0016] Among them, the seismic response includes acceleration, displacement and stress response.

[0017] As a preferred solution, the preset different levels of earthquake-resistant safety states specifically include:

[0018] Level 1: Dam status under earthquakes with an intensity less than 6 degrees;

[0019] Level 2: Dam status under basic intensity with a probability of exceeding 10% in 50 years;

[0020] Level 3: Dam status under a major earthquake that occurs once in 2200 years;

[0021] Level 4: Dam status under the action of a 5,000-year dam-fortification earthquake;

[0022] Level 5: Dam status under the maximum credible earthquake that occurs once in ten thousand years.

[0023] As a preferred solution, the comparison of parameters obtained at the monitoring points and the calculated earthquake responses under different levels of seismic safety conditions specifically includes: analyzing the acceleration time history records of the monitoring points, obtaining the acceleration and dynamic displacement responses, and determining the acceleration peak value and dynamic displacement peak value, and comparing them with the calculated earthquake responses under different levels of seismic safety conditions to determine which level the earthquake belongs to.

[0024] As a preferred solution, the vulnerability analysis of the dam body to determine the post-earthquake damage level of the gravity dam specifically includes:

[0025] Different horizontal strips of dam damage index and earthquake intensity index are established, and the basic theory of multi-strip analysis and the principle of maximum likelihood estimation are used to calculate the parameters of the vulnerability function; finally, the seismic vulnerability curve of the gravity dam based on the dam crest displacement is constructed to determine the probability of the dam being in various levels of seismic damage after the earthquake; among them, the seismic damage levels are divided into:

[0026] Level 1 earthquake damage means the dam is basically intact; Level 2, the dam is slightly damaged; Level 3, the dam is moderately damaged; Level 4, the dam is seriously damaged; Level 5, the dam has collapsed.

[0027] A second aspect of the present invention provides a system, comprising a memory and a processor, wherein the memory stores a computer program corresponding to the gravity dam post-seismic evaluation method described in the first aspect and capable of being loaded by the processor and executed.

[0028] A third aspect of the present invention provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, are used to implement a process corresponding to the gravity dam post-seismic evaluation method described in the second aspect.

[0029] Compared with the prior art, the beneficial effect of adopting the above technical scheme is that the present invention can quickly analyze the strong vibration response data of the strong vibration monitoring points on the dam structure after an earthquake to determine whether the dam structure has suffered earthquake damage and the current safety level of the dam, and determine whether to take emergency measures based on the analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of the post-earthquake evaluation method for dams proposed in the present invention.

[0031] Figure 2 The present invention is a vulnerability analysis flow chart in one embodiment. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be construed as limitations on the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0033] In order to achieve the purpose of rapid safety assessment of gravity dam safety after a strong earthquake, the present invention proposes a gravity dam post-earthquake evaluation method, please refer to Figure 1 , the specific plan is as follows:

[0034] Step 1: Set up monitoring points at key locations of the gravity dam to monitor the response parameters of each location during an earthquake.

[0035] In this embodiment, the highest water retaining dam section and the highest overflow dam section of the gravity dam are used as the key parts for monitoring. Specifically, when setting up monitoring points, the monitoring points should be arranged at the dam top, the slope change part of the dam slope or near 2 / 3 of the dam height, the dam foundation and the free field of the river valley. Generally speaking, the number of monitoring points for a level 1 high gravity dam should not be less than 6 to ensure the accuracy of monitoring.

[0036] Furthermore, monitoring points generally collect data through sensors. When arranging them, the sensor measurement direction should be mainly horizontal along the river, and arranged into three components: horizontal along the river, horizontal across the river, and vertical.

[0037] Step 2: Conduct one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis on key parts of the gravity dam to calculate the seismic response under different preset levels of seismic safety conditions.

[0038] For gravity dams that need to be evaluated after an earthquake, it is necessary to establish a dam seismic simulation database after multiple levels of earthquakes before an earthquake. In this embodiment, the seismic safety status of gravity dams under earthquakes is divided into five levels, namely:

[0039] Level 1: Dam status under safe earthquake action (less than earthquake intensity 6 degrees);

[0040] Level 2: Dam status under basic intensity with a probability of exceeding 10% in 50 years;

[0041] Level 3: Dam status under a major earthquake that occurs once in 2200 years;

[0042] Level 4: Dam status under the action of a 5,000-year dam-fortification earthquake;

[0043] Level 5: Dam status under the maximum credible earthquake that occurs once in ten thousand years.

[0044] When establishing the dam seismic simulation database, different levels of analysis are carried out, as follows:

[0045] The highest retaining dam section and the highest overflow dam section of the gravity dam are simplified as cantilever beams. Under the action of earthquakes of different levels, one-dimensional finite element dynamic analysis is carried out to calculate the seismic response of the corresponding dam section of the gravity dam.

[0046] The highest retaining dam section and the highest overflow dam section of the gravity dam are simplified into plane problems. Two-dimensional finite element dynamic analysis is performed under different levels of earthquakes to calculate the seismic response of the corresponding dam section of the gravity dam.

[0047] Under the action of earthquakes of different levels, a three-dimensional finite element dynamic analysis is performed on the highest water retaining dam section and the highest overflow dam section of the gravity dam, and the seismic response of the corresponding dam section of the gravity dam is calculated. Under the action of an earthquake, the dam body will be damaged. If the elastic model is used, the damage of the dam body cannot be calculated. Therefore, this embodiment adopts a three-dimensional finite element dynamic analysis, takes into account the nonlinear dynamic coupling of the dam-foundation-reservoir water system, and establishes a quantitative evaluation criterion for preventing dam disasters during major earthquakes and a quantitative indicator system for preventing dam failure based on the residual deformation dam concrete seismic damage evolution constitutive model and seismic safety evaluation criteria.

[0048] It should be noted that when conducting seismic simulation analysis of a dam, the earthquake responses obtained mainly include acceleration, displacement, and stress response.

[0049] A dam seismic simulation database can be established based on the seismic response data obtained from one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis.

[0050] Step 3: After an earthquake occurs, compare the parameters obtained from the monitoring points with the calculated earthquake responses under different levels of seismic safety conditions to determine the earthquake level and then determine the post-earthquake safety level of the gravity dam.

[0051] After an earthquake occurs, the acceleration time history record is directly collected by the sensors in the pre-installed monitoring points, the acceleration is analyzed, and the displacement response and dynamic displacement response are obtained through integration operation, and then the acceleration peak value and dynamic displacement peak value are determined. By comparing the actual acceleration peak value and dynamic displacement peak value with the earthquake response data (acceleration, displacement) in the dam seismic simulation database, it can be determined which level of the earthquake is in the divided level.

[0052] After determining the level of the earthquake, due to the randomness of earthquakes, the damage to the dam caused by the same magnitude of earthquake acceleration peak may be different. This embodiment describes the relationship between seismic motion intensity and the damage limit state from a macro perspective, that is, an earthquake vulnerability analysis is performed to determine the probability of each level of earthquake response causing damage to the dam and to complete the post-earthquake safety assessment of the dam.

[0053] The seismic vulnerability of a structure refers to the conditional probability that the structure exceeds a certain damage state under the action of an earthquake of a certain intensity. In this example, the multi-band analysis method is used to analyze the post-earthquake situation of the dam. Figure 2First, determine the dam boundary, finite element digital model and concrete damage constitutive model; then establish the dam body damage index and earthquake intensity index; through seismic wave selection and amplitude modulation, conduct nonlinear time history analysis on the dam to determine the seismic damage level under each earthquake motion; then establish different DM-IM horizontal strips, and use the basic theory of MSA (multiple strip analysis method) and the principle of maximum likelihood estimation to calculate the vulnerability function parameters; finally, construct the gravity dam seismic vulnerability curve based on the dam crest displacement to determine the probability of the dam being in each level of seismic damage level after the earthquake.

[0054] Among them, the earthquake damage level under each earthquake motion is mainly determined based on the dam body damage index, and the possible damage states of concrete gravity dams under earthquakes are divided into five levels: basically intact, slightly damaged, moderately damaged, severely damaged and dam break. The relationship between the five earthquake damage levels and the dam body damage index includes:

[0055] When the dam top displacement is between 0mm and 20mm, it is defined as first-level earthquake damage, and the dam body is basically intact: the gravity dam remains basically intact, with a small amount of minor damage in some parts, which does not hinder the normal operation of the gravity dam.

[0056] When the displacement of the dam top is between 20mm and 40mm, it is defined as a second-level earthquake damage, and the dam body is slightly damaged: the auxiliary structure of the gravity dam is slightly damaged, and the dam body can resume normal operation after a little repair.

[0057] When the displacement of the dam crest is between 40mm and 70mm, it is defined as a third-level earthquake damage, and the dam body is moderately damaged: obvious cracks appear in most areas of the gravity dam, and slight leakage begins in some places. The auxiliary structure is moderately damaged, and the gravity dam can continue to be used normally after maintenance.

[0058] When the displacement of the dam top is between 70mm and 100mm, it is defined as a level 4 earthquake damage, and the dam body is seriously damaged: through cracks appear in most parts of the gravity dam, and leakage is serious. The auxiliary structure is seriously damaged, and the dam body is difficult to repair.

[0059] When the displacement of the dam top is greater than 100mm, it is defined as a level 5 earthquake damage and the dam body will fail: gravity dam failure, which cannot be repaired.

[0060] After determining the earthquake level, the earthquake damage level of the dam body can be determined through the above-mentioned vulnerability analysis. The present invention quantitatively describes the seismic performance of the gravity dam structure in a probabilistic sense through the acceleration peak increment method, describes the relationship between the earthquake intensity and the damage limit state from a macroscopic perspective, establishes a rapid post-earthquake safety assessment index for the dam structure, and statistically calculates the safety status warning value of the dam structure under different levels of earthquakes, thereby determining the earthquake damage level.

[0061] Finally, the impact of this earthquake on the gravity dam is given according to the determined earthquake damage level results, and corresponding emergency measures are given according to the earthquake emergency plan.

[0062] The innovation and invention of establishing a dam seismic simulation database after multiple earthquakes and forming a post-seismic evaluation method for gravity dams are as follows:

[0063] (1) The seismic vulnerability analysis technology was introduced, and the acceleration peak increment method was used to quantitatively describe the seismic performance of the gravity dam structure in a probabilistic sense, and to characterize the relationship between the seismic intensity and the damage limit state from a macroscopic perspective. Based on the seismic vulnerability analysis, a rapid post-earthquake safety assessment index for the dam structure was established, and the safety status warning value of the dam structure under different earthquakes was statistically analyzed; at the same time, seismic vulnerability analysis is also a key step in the earthquake risk assessment of the structure, and is an important basis for formulating pre-disaster defense measures and post-earthquake emergency decisions, see the figure below:

[0064] (2) A numerical simulation model of a concrete dam is constructed, taking into account the dynamic interaction between the gravity dam body, reservoir water, and foundation. The calculation results provide the acceleration time history curves of the dam crest of all dam sections and the acceleration time history curves of the dam body at all strong vibration monitoring points; the stress distribution of each dam section is given, forming a characteristic library of the dam body's post-earthquake structural response.

[0065] (3) Relying on the relevant historical data obtained by the dam's strong earthquake monitoring system and using strong earthquake records, finite element numerical simulation analysis is used to identify the key locations for earthquake damage investigation on the dam structure. Based on numerical model simulation analysis, a post-earthquake evaluation method for dam structure safety is proposed, and corresponding software is developed.

[0066] (4) After a strong earthquake occurs in the dam site area, the simulation analysis expert database can be automatically matched and queried, and the existing simulation analysis conclusions and early warnings can be combined with the results of the rapid post-earthquake safety assessment of the dam body to quickly form a post-earthquake safety evaluation report, providing support for rapid post-earthquake disaster reduction of the dam.

[0067] (5) The simulation numerical model library can also be quickly called to perform strong earthquake inversion analysis, simulate and analyze the structural damage response characteristics of the dam under the earthquake, identify the key parts of the dam structure earthquake damage investigation, and provide clear technical guidance for dam emergency rescue decision-making.

[0068] (6) The evaluation results will also be connected to the data interface of the existing dam safety management system of the power plant, and the existing monitoring data in the system will be comprehensively analyzed to generate a post-earthquake analysis bulletin. Combined with the data of the unit online monitoring, the project safety status will be determined, and a post-earthquake analysis and evaluation report will be generated to realize the dam post-earthquake smart disaster prevention evaluation system. This will provide support for earthquake emergency rescue and for the earthquake resistance review and earthquake resistance reinforcement design research of the engineering structure.

[0069] The embodiment of the present invention further proposes a system, including a memory and a processor, wherein the memory stores a computer program corresponding to the aforementioned gravity dam post-seismic evaluation method that can be loaded and executed by the processor.

[0070] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer readable medium, and the computer program includes a program code for executing the method shown in the flowchart.

[0071] It should be noted that the computer-readable medium shown in the embodiment of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, - but not limited to - an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by an instruction execution system, device or device or used in combination with it. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0072] The flowchart and block diagram in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0073] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0074] As another aspect, the present application also provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the gravity dam post-seismic evaluation method described in the above embodiment.

[0075] As another aspect, the present application also provides a computer-readable medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements the gravity dam post-seismic evaluation method described in the above embodiment.

[0076] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0077] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0078] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific situations; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0079] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for post-seismic evaluation of a gravity dam, characterized in that: include: Set up monitoring points at key locations of the gravity dam to monitor the response parameters of each location during an earthquake; Conduct one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis on key parts of the gravity dam to calculate the seismic response under different levels of preset seismic safety conditions; After an earthquake occurs, the parameters obtained from the monitoring points are compared with the calculated earthquake responses under different levels of seismic safety conditions to determine the earthquake level, and then a vulnerability analysis of the dam body is conducted to determine the post-earthquake damage level of the gravity dam.

2. The gravity dam post-seismic evaluation method according to claim 1, characterized in that: The key parts of the gravity dam include the highest water retaining dam section and the highest overflow dam section.

3. The gravity dam post-seismic evaluation method according to claim 1, characterized in that: The monitoring points are arranged at the dam crest of the dam section, the side slope of the dam slope or 2 / 3 of the dam height, the dam foundation and the free field of the river valley.

4. The gravity dam post-seismic evaluation method according to claim 1, characterized in that: The sensor measurement direction of the monitoring points is mainly along the Pingshun River, and the monitoring points are arranged in three components: horizontally along the river, horizontally across the river, and vertically.

5. The gravity dam post-seismic evaluation method according to claim 2, characterized in that: The one-dimensional, two-dimensional and three-dimensional finite element dynamic analysis is performed on the key parts of the gravity dam to calculate the seismic response under different levels of preset seismic safety states, specifically including: The highest retaining dam section and the highest overflow dam section of the gravity dam are simplified as cantilever beams. Under the action of earthquakes of different levels, one-dimensional finite element dynamic analysis is carried out to calculate the seismic response of the corresponding dam section of the gravity dam. The highest retaining dam section and the highest overflow dam section of the gravity dam are simplified into plane problems. Two-dimensional finite element dynamic analysis is performed under different levels of earthquakes to calculate the seismic response of the corresponding dam section of the gravity dam. Under the action of earthquakes of different levels, a three-dimensional finite element dynamic analysis is performed on the highest water retaining dam section and the highest overflow dam section of the gravity dam to calculate the seismic response of the corresponding dam section of the gravity dam; Among them, the seismic response includes acceleration, displacement and stress response.

6. The gravity dam post-seismic evaluation method according to claim 5, characterized in that: The preset different levels of earthquake-resistant safety states specifically include: Level 1: Dam status under earthquakes with an intensity less than 6 degrees; Level 2: Dam status under basic intensity with a probability of exceeding 10% in 50 years; Level 3: Dam status under a major earthquake that occurs once in 2200 years; Level 4: Dam status under the action of a 5,000-year dam-fortification earthquake; Level 5: Dam status under the maximum credible earthquake that occurs once in ten thousand years.

7. The gravity dam post-seismic evaluation method according to claim 5 or 6, characterized in that: The comparison of the parameters obtained at the monitoring points with the calculated earthquake responses under different levels of seismic safety conditions specifically includes: analyzing the acceleration time history records of the monitoring points, obtaining the acceleration and dynamic displacement responses, and determining the acceleration peak value and the dynamic displacement peak value, and comparing them with the calculated earthquake responses under different levels of seismic safety conditions to determine which level the earthquake belongs to.

8. The gravity dam post-seismic evaluation method according to claim 1, characterized in that: The vulnerability analysis of the dam body to determine the post-earthquake damage level of the gravity dam specifically includes: Different horizontal strips of dam damage index and earthquake intensity index are established, and the basic theory of multi-strip analysis and the principle of maximum likelihood estimation are used to calculate the parameters of the vulnerability function; finally, the seismic vulnerability curve of the gravity dam based on the dam crest displacement is constructed to determine the probability of the dam being in various levels of seismic damage after the earthquake; among them, the seismic damage levels are divided into: Level 1 earthquake damage means the dam is basically intact; Level 2, the dam is slightly damaged; Level 3, the dam is moderately damaged; Level 4, the dam is seriously damaged; Level 5, the dam has collapsed.

9. A system, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program corresponding to the gravity dam post-seismic evaluation method according to any one of claims 1 to 8 that can be loaded and executed by the processor.

10. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, they are used to implement a process corresponding to the gravity dam post-seismic evaluation method according to any one of claims 1 to 8.

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