Method, device, equipment and medium for evaluating safety state of concrete dam

Abstract

The present application provides a method, device, equipment and medium for evaluating the safety state of a concrete dam. The method includes: obtaining the fault parameters around the dam and the path between the dam and the fault according to a preset distance range; obtaining the ground motion parameters of the dam at different magnitudes through the stochastic finite-fault method according to the fault parameters and the path, wherein different magnitudes correspond to different values of the ground motion parameters; obtaining the seismic response parameters of the dam at different magnitudes through a finite element model according to the ground motion parameters of the dam, wherein the seismic response parameters are the parameters that change when the dam is affected by an earthquake; obtaining the safety evaluation parameters of the dam according to the seismic response parameters of the dam and the structural type of the dam. After an earthquake, the safety state of the dam is judged according to the threshold range in which the corresponding observable seismic response parameters are located. The method of the present application can quickly and accurately evaluate the post-earthquake safety state of the dam.

Description

Technical Field

[0001] This application relates to the technical field of water conservancy projects, and particularly to a method, device, equipment, and medium for evaluating the safety status of concrete dams. Background Art

[0002] For water conservancy projects, safety detection is beneficial to maintaining the normal operation of water conservancy projects. Among them, it is very important to evaluate the safety of dams in water conservancy projects for subsequent maintenance work or taking emergency treatment measures.

[0003] The existing post-earthquake safety status evaluation technology for dams is based on the monitoring results of instruments such as strong motion seismographs, vertical lines, chord length monitoring, transverse joint crack gauges, and strain gauges, as well as manual inspections. After an earthquake, it mainly makes a human judgment based on the changes in instrument measurement data and the damage found during manual inspections combined with engineering experience, or temporarily conducts numerical calculation and analysis to evaluate the safety status of the dam; these processing methods are difficult to discover iconic changes in a short time and cannot quickly and accurately evaluate the safety status of the dam.

[0004] Therefore, this application proposes a method for more quickly and accurately evaluating the safety status of dams. Summary of the Invention

[0005] This application provides a method, device, equipment, and medium for evaluating the safety status of concrete dams to solve the problem in the prior art that the safety status of dams cannot be quickly and accurately evaluated.

[0006] In a first aspect, this application provides a method for evaluating the safety status of a concrete dam, including:

[0007] Obtain the fault parameters around the dam and the path between the dam and the fault according to a preset distance range, where the preset distance range is a distance range determined according to the dam;

[0008] According to the fault parameters and the path, obtain the ground motion parameters of the dam at different magnitudes through the stochastic finite fault method, where the ground motion parameters are physical parameters representing the ground motion caused by an earthquake, and different magnitudes correspond to different ground motion parameter values;

[0009] According to the ground motion parameters of the dam, obtain the seismic response parameters of the dam at different magnitudes through a finite element model, where the seismic response parameters are the parameters of the dam that change under the influence of an earthquake;

[0010] According to the seismic response parameters of the dam and the structural type of the dam, obtain the safety evaluation parameters of the dam.

[0011] In a possible implementation, obtaining the seismic response parameters of the dam under different earthquake magnitudes through a finite element model according to the seismic motion parameters of the dam includes:

[0012] According to the geometrical grid of the dam and the material parameters of the dam, the material parameters of the unit body are obtained, wherein the geometrical grid includes a plurality of unit bodies, and the seismic response parameters of the unit bodies are associated with the seismic parameters of the dam, the geometrical grid and the material parameters of the unit bodies through a preset relational expression in the finite element model;

[0013] According to the seismic motion parameters of the dam, the geometric grid and the material parameters of the unit body, the seismic response parameters of each unit body of the dam under different magnitudes are obtained through the finite element model, wherein the seismic response parameters of the dam include the seismic response parameters of multiple unit bodies.

[0014] In a possible implementation, obtaining the safety assessment parameters of the dam according to the seismic response parameters of the dam and the structural type of the dam includes:

[0015] Acquire preselected structures of the dam, wherein each of the preselected structures includes a plurality of the unit bodies, and the preselected structures include different structural types of the dam;

[0016] According to the seismic response parameters of each of the unit bodies under different earthquake magnitudes, a response parameter type corresponding to the structural type of the preselected structure is obtained, wherein the seismic response parameters of the unit body include a plurality of different response parameter types, and the response parameter type includes the displacement of the unit body and the stress of the unit body;

[0017] The safety assessment parameter is obtained according to the reaction parameter type corresponding to the preselected structure.

[0018] In a possible implementation, the acquiring the reaction parameter type corresponding to the structure type of the preselected structure includes:

[0019] If the structural type of the preselected structure is a sliding surface, the reaction parameter type corresponding to the sliding surface is the displacement of the unit body; and

[0020] The step of obtaining the safety assessment parameter according to the reaction parameter type corresponding to the preselected structure includes:

[0021] Obtaining a first ratio between the area of ​​a unit body that generates displacement in the sliding surface and the area of ​​the sliding surface under different earthquake magnitudes, and obtaining a sliding area ratio as the safety assessment parameter;

[0022] If the structural type of the preselected structure is a damage crack, the type of response parameter corresponding to the damage crack is the stress of the unit body; and

[0023] Obtaining the safety assessment parameter according to the type of response parameter corresponding to the preselected structure includes:

[0024] Obtaining a second ratio between the thickness of the unit body of the damage crack and the thickness of the dam under different earthquake magnitudes, and obtaining the damage thickness ratio as the safety assessment parameter, where the thickness of the dam is the thickness along the river direction at the position of the dam where the damage crack is located.

[0025] In a possible implementation, after obtaining the safety assessment parameter, the method further includes:

[0026] Confirming a first weight value of the sliding area ratio according to the change trend of the sliding area ratio under different earthquake magnitudes;

[0027] Confirming a second weight value of the sliding area ratio according to the change trend of the damage thickness ratio under different earthquake magnitudes;

[0028] Obtaining a safety assessment value of the dam according to the sliding area ratio, the first weight value, the damage thickness ratio, and the second weight value, where the safety assessment value is used to divide the safety level of the dam.

[0029] In a possible implementation, if the first weight value is not zero, the method further includes:

[0030] Taking the type of response parameter corresponding to the sliding area ratio corresponding to the first weight value as the first monitoring parameter of the dam, where the first monitoring parameter is used to calculate the real-time safety assessment value of the dam;

[0031] If the second weight value is not zero, the method further includes:

[0032] Taking the type of response parameter corresponding to the damage thickness ratio corresponding to the second weight value as the second monitoring parameter of the dam, where the second monitoring parameter is used to calculate the real-time safety assessment value of the dam.

[0033] In a possible implementation, obtaining the ground motion parameters of the dam under different earthquake magnitudes by the stochastic finite fault method according to the fault parameters and the path includes:

[0034] According to the site conditions of the dam, the fault parameters, and the path, the ground motion parameters of the dam under different magnitudes are obtained by the stochastic finite-fault method; wherein, the site conditions include the topography and geology of the location where the dam is located, the fault parameters include the fault location and the fault strike, and the ground motion parameters include the time history of the seismic wave and the response spectrum of the seismic wave.

[0035] In a second aspect, the present application provides a safety status assessment device for a concrete dam, including:

[0036] An acquisition module, configured to acquire the fault parameters around the dam and the path between the dam and the fault according to a preset distance range, wherein the preset distance range is a distance range confirmed according to the dam;

[0037] A first processing module, configured to obtain the ground motion parameters of the dam under different magnitudes by the stochastic finite-fault method according to the fault parameters and the path, wherein the ground motion parameters are physical parameters representing the ground motion caused by an earthquake, and different magnitudes correspond to different values of the ground motion parameters;

[0038] A second processing module, configured to obtain the seismic response parameters of the dam under different magnitudes through a finite element model according to the ground motion parameters of the dam, wherein the seismic response parameters are parameters of the dam that change under the influence of an earthquake;

[0039] An evaluation module, configured to obtain the safety evaluation parameters of the dam according to the seismic response parameters of the dam and the structural type of the dam.

[0040] In a third aspect, the present application provides a safety status assessment device for a concrete dam, including: at least one processor and a memory;

[0041] The memory stores computer execution instructions;

[0042] The at least one processor executes the computer execution instructions stored in the memory, so that the at least one processor executes the safety status assessment method for a concrete dam as described above.

[0043] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the safety status assessment method for a concrete dam as described above are implemented.

[0044] A method, device, equipment and medium for evaluating the safety state of a concrete dam provided by the present application. According to a preset distance range, fault parameters around the dam and the path between the dam and the fault are obtained, where the preset distance range is a distance range confirmed according to the dam; according to the fault parameters and the path, the ground motion parameters of the dam under different magnitudes are obtained by the stochastic finite-fault method, where the ground motion parameters are physical parameters representing the ground motion caused by an earthquake, and different magnitudes correspond to different values of the ground motion parameters; according to the ground motion parameters of the dam, the seismic response parameters of the dam under different magnitudes are obtained through a finite element model, where the seismic response parameters are parameters of the dam that change under the influence of an earthquake; according to the seismic response parameters of the dam and the structural type of the dam, the safety evaluation parameters of the dam are obtained.

[0045] In the above method, the preset distance range is confirmed according to the location of the dam. A fault is found within this preset distance range, and the fault parameters are obtained; according to the fault parameters, the earthquake caused by the fault activity can be simulated subsequently, and this earthquake can propagate to the dam; the path between the dam and the fault is obtained. According to this path and the fault parameters, the seismic response parameters of the dam under different magnitudes can be generated by the stochastic finite-fault method. Among them, the stochastic finite-fault method is used to simulate the possible earthquake situation according to the fault parameters and generate the ground motion parameters of different magnitudes accordingly. The ground motion parameters are physical parameters representing the ground motion caused by an earthquake, and different magnitudes correspond to different values of the ground motion parameters; a finite element model of the dam is established according to the ground motion parameters, and the seismic response parameters of the dam under different simulated magnitudes are obtained according to this finite element model, that is, the possible responses of the dam affected by the simulated ground motion parameters; according to the seismic response parameters and the structure of the dam itself, a safety evaluation parameter for evaluating the safety of the dam is established. This safety evaluation parameter can be used to evaluate the safety of the dam, and based on the observable seismic response parameters corresponding to this safety evaluation parameter, the safety state of the dam can be obtained quickly and accurately. Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 It is a schematic diagram of the scenario for evaluating the safety state of a concrete dam provided by the embodiment of the present application;

[0048] Figure 2Flow schematic of a method for evaluating the safety status of a concrete dam provided by an embodiment of the present application Figure 1 ;

[0049] Figure 3 Flow schematic of a method for evaluating the safety status of a concrete dam provided by an embodiment of the present application Figure 2 ;

[0050] Figure 4 Flow schematic of a method for evaluating the safety status of a concrete dam provided by an embodiment of the present application Figure 3 ;

[0051] Figure 5 Flow schematic of a method for evaluating the safety status of a concrete dam provided by an embodiment of the present application Figure 4 ;

[0052] Figure 6 Diagram of a device for evaluating the safety status of a concrete dam provided by an embodiment of the present invention;

[0053] Figure 7 Hardware schematic of the equipment for evaluating the safety status of a concrete dam provided by an embodiment of the present invention. Detailed implementation manners

[0054] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0055] The existing technology for evaluating the post-earthquake safety status of concrete dams is based on the monitoring results of instruments such as strong motion seismographs, vertical wires, chord length monitoring, transverse joint crack gauges, strain gauges, etc. and manual inspections. After an earthquake, the safety status of the dam is mainly judged manually according to the changes in the instrument measurement data and the damage found during manual inspections in combination with engineering experience, or numerical calculation and analysis are carried out temporarily.

[0056] Its disadvantages are that, on the one hand, the amount of data provided by the monitoring instruments is large, and it is difficult to detect important landmark changes and make effective data analysis in a short period of time. The difficulty and workload of manual inspections for huge concrete dams make this work impossible to complete in a short period of time. On the other hand, the significant changes in monitoring data and the obvious damage visible in manual observations can only correspond to more serious earthquake damage states. For the impact of earthquakes of lower magnitudes on the dam, the changes in monitoring data may be very subtle, especially for monitoring values ​​such as seam openings and strain gauges that do not record the process but only record the final state. It is even more difficult to judge the impact of the earthquake based on the current values ​​alone. Manual inspections are also unable to detect minor damage that is not recognizable to the naked eye. All these make it impossible to quickly and accurately complete the safety status assessment of concrete dams.

[0057] Therefore, this application proposes a faster and more accurate safety status assessment method to evaluate the safety status of the dam.

[0058] The implementation process of a concrete dam safety status assessment method proposed in the present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] Figure 1 A schematic diagram of a scenario for evaluating the safety status of a concrete dam provided in an embodiment of the present application. Figure 1 As shown, the dam 10 comprises: a dam shoulder 101, a dam body 102 and a foundation 103;

[0060] The dam shoulder 101 is used to support the two ends of the dam body 102, and the contact surface between the dam shoulder 101 and the dam body 102 may slide; the dam 10 is subjected to a static load along the river direction, and if an earthquake occurs, the foundation 103 of the dam 10 is subjected to an initial dynamic load;

[0061] The fault near the dam 10 may affect the safety of the dam 10. According to the location of the dam 10, a preset distance range is determined, and the fault parameters around the dam 10 and the path between the dam 10 and the fault are obtained within the preset distance range. The fault parameters of the fault will affect the seismic waves generated when the fault is active, and the path between the dam 10 and the fault will affect the propagation of seismic waves. According to the fault parameters and the path, the random finite fault method can be used to simulate and obtain the seismic motion parameters of the dam 10 under different magnitudes, and different magnitudes correspond to different seismic motion parameter values.

[0062] The finite element model can represent the relationship between the seismic motion parameters of the dam 10 and the seismic response parameters of the dam 10 through equations; according to the seismic motion parameters of the dam 10, the seismic response parameters of the dam 10 at different magnitudes are obtained through the finite element model, that is, the parameters that change when the dam 10 is affected by the earthquake are obtained; according to the seismic response parameters of the dam 10 and the structural type of the dam 10, it can be confirmed which parameters in the seismic response parameters are used to establish the safety assessment parameters; for example, the seismic response parameters include displacement, and the dam shoulder 101 can be regarded as a sliding block, and its displacement will affect the safety of the dam body 102, so the displacement can be used to establish the safety assessment parameters.

[0063] Figure 2 Schematic flow of a method for evaluating the safety status of a concrete dam provided by an embodiment of the present application Figure 1 As Figure 2 shown, the method includes:

[0064] S201. According to a preset distance range, obtain the fault parameters around the dam and the path between the dam and the fault, where the preset distance range is a distance range confirmed according to the dam.

[0065] According to the environmental conditions of the dam project site and the historical data analysis of the seismic impact of the fault, a preset distance range is confirmed with the dam as the center; within the preset distance range, the fault and the fault parameters of the fault are obtained, and there may be 1-3 faults within the preset distance range; the fault parameters are physical parameters related to the fault, and the physical parameters of the seismic waves generated by the fault activities with different fault parameters are different;

[0066] The path between the fault and the dam will affect the transmission of seismic waves. In order to be able to simulate the seismic impact brought by the fault activity, it is also necessary to obtain the path between the dam and the fault, and at the same time, seismic simulation is carried out through the fault parameters and the path.

[0067] S202. According to the fault parameters and the path, obtain the seismic motion parameters of the dam at different magnitudes through the stochastic finite fault method, where the seismic motion parameters are physical parameters representing the ground motion caused by the earthquake, and different magnitudes correspond to different seismic motion parameter values.

[0068] When simulating an earthquake, the stochastic finite fault method that can reflect the rupture characteristics of the seismic source can be selected. This stochastic finite fault method can generate the seismic motion parameters of the dam at different magnitudes based on parameters such as fault parameters and paths. The fault parameter values at different magnitudes are different, and the corresponding seismic motion parameters of the dam simulated by the stochastic finite fault method are different; where

[0069] The input of the stochastic finite fault method can also include other parameters:

[0070] Exemplarily, according to the site conditions of the dam, the fault parameters, and the path, the ground motion parameters of the dam at different magnitudes are obtained by the stochastic finite-fault method; wherein, the site conditions include the topography and geology of the location where the dam is located, the fault parameters include the fault location and the fault strike, and the ground motion parameters include the time history of the seismic wave and the response spectrum of the seismic wave.

[0071] The stochastic finite-fault method utilizes the site conditions of the dam, the fault parameters, the path, as well as parameters such as the focal depth and the epicentral distance to simulate and generate the ground motion parameters of the dam at different magnitudes; the fault parameters include the fault location, the fault strike, the fault dip direction, the fault dip angle, the motion property, the rupture propagation direction, and the rupture propagation speed; the values of the fault parameters corresponding to different magnitudes may be different. The stochastic finite-fault method can generate the ground motion parameters of the dam at different magnitudes according to data such as the fault location, the fault strike, and the rupture propagation speed, that is, the time history and the response spectrum of the seismic wave transmitted to the dam. For example, the acceleration time history transmitted to the dam foundation and the acceleration response spectrum.

[0072] S203. According to the ground motion parameters of the dam, the seismic response parameters of the dam at different magnitudes are obtained through a finite element model, wherein the seismic response parameters are the parameters that change when the dam is affected by an earthquake.

[0073] The finite element model can establish the relationship between the ground motion parameters of the dam and the seismic response parameters of the dam through relational expressions such as the equilibrium equation and the motion equation; taking the ground motion parameters of the dam as the input of the finite element model, the seismic response parameters of the dam calculated by the finite element model can be obtained. Different magnitudes respectively correspond to different inputs of the ground motion parameters of the dam and different outputs of the seismic response parameters of the dam; the ground motion parameters of the dam are physical parameters related to ground motion. The dam will have corresponding physical reactions under the influence of these ground motion parameters. The physical reactions that the dam will have correspond to the seismic response parameters, such as changes in displacement, etc. Displacement is the seismic response parameter of the dam.

[0074] S204. According to the seismic response parameters of the dam and the structural type of the dam, the safety assessment parameters of the dam are obtained.

[0075] Under the ground motion parameters of the dam at different magnitudes simulated, the dam generates seismic response parameters. According to these seismic response parameters, it can be analyzed whether the physical changes of the dam are within the bearing range of the dam; different structural types of the dam have different bearing capacities. Therefore, according to the seismic response parameters and the structural type of the dam, the safety assessment parameters of the dam can be constructed to facilitate the calculation of whether the dam is in a safe state.

[0076] In the embodiments of the present application, a preset distance range is confirmed according to the location of the dam, a fault is found within the preset distance range, and fault parameters are obtained; subsequent to the fault parameters, an earthquake caused by the activity of the fault can be simulated, and the earthquake can propagate to the dam; the path between the dam and the fault is obtained, and according to the path and the fault parameters, earthquake response parameters of the dam at different magnitudes can be generated by the stochastic finite fault method, wherein the stochastic finite fault method is used to simulate the possible earthquake conditions generated by the fault according to the fault parameters, and correspondingly generate ground motion parameters of different magnitudes, and the ground motion parameters are physical parameters representing the ground motion caused by the earthquake, and different magnitudes correspond to different values of the ground motion parameters; a finite element model of the dam is established according to the ground motion parameters, and earthquake response parameters of the dam at different magnitudes obtained by simulation are obtained according to the finite element model, that is, the possible responses of the dam affected by the simulated ground motion parameters; according to the earthquake response parameters and the structure of the dam itself, a safety evaluation parameter for evaluating the safety of the dam is established, and the safety evaluation parameter can be used to evaluate the safety of the dam, and based on the earthquake response parameters corresponding to the safety evaluation parameter, pre-earthquake observation of the dam can be performed to quickly and accurately obtain the safety state of the dam.

[0077] Figure 3 Schematic flow of a method for evaluating the safety state of a concrete dam provided by an embodiment of the present application Figure 2 As Figure 3 shown, the method includes:

[0078] S301. Obtain the material parameters of the unit body according to the geometric grid of the dam and the material parameters of the dam, wherein the geometric grid includes a plurality of unit bodies, and the earthquake response parameters of the unit body are associated with the earthquake ground motion parameters of the dam, the geometric grid and the material parameters of the unit body through a preset relational expression in the finite element model.

[0079] The dam can be decomposed into a plurality of unit bodies through a geometric grid. Each unit body includes a plurality of nodes and the connections between the nodes. There are common points and common connections between adjacent unit bodies; in addition to the earthquake ground motion parameters of the dam, the material parameters of the dam will also affect the earthquake response parameters of the dam; according to the geometric grid and the material parameters of the dam, the material parameters of each unit body are decomposed to facilitate subsequent confirmation of the earthquake response parameters of each unit body; the material parameters of the dam are related to the material used to construct the dam. If the concrete dam is mainly constructed of concrete, then the material of each unit body is concrete; the size of the unit body can be divided according to actual needs. For example, the side length of the unit body can be set to 5 meters.

[0080] S302. According to the seismic motion parameters of the dam, the geometric grid and the material parameters of the unit body, the seismic response parameters of each unit body of the dam under different magnitudes are obtained through the finite element model, wherein the seismic response parameters of the dam include the seismic response parameters of a plurality of the unit bodies.

[0081] The seismic response parameters of the unit body are associated with the seismic motion parameters of the dam, the geometric grid and the material parameters of the unit body through the preset relationship in the finite element model; the seismic motion parameters of the dam can be used as the seismic motion parameters of the unit body. Under different earthquake magnitudes, each unit body has different corresponding seismic response parameters, and the seismic response parameters of the unit body include the displacement, acceleration, stress, etc. of the unit body; there is a displacement effect between adjacent units in the geometric grid. For example, under a certain earthquake magnitude, the acceleration in the seismic motion parameters of the dam is transmitted to the unit body belonging to the foundation position. The foundation unit body is affected by the earthquake and the seismic motion parameters such as displacement change, and the other units adjacent to the foundation unit body are driven to displace.

[0082] In an embodiment of the present application, in a finite element model, a geometric grid of the dam is constructed to divide the dam into multiple unit bodies, and the association between the seismic response parameters of each unit body and the seismic motion parameters of the dam, the geometric grid and the material parameters of the unit body is represented by a preset relationship of the finite element model to obtain the seismic response parameters of each unit body of the dam, confirm the seismic response parameters at different locations of the dam, and quickly obtain data for analyzing the safety status of the dam.

[0083] Figure 4 A schematic diagram of a method for assessing the safety status of a concrete dam provided in an embodiment of the present application Figure 3 .like Figure 4 As shown, the method includes:

[0084] S401. Obtain preselected structures of the dam, wherein each of the preselected structures includes a plurality of the unit bodies, and the preselected structures include different structural types of the dam.

[0085] There are different structural types of dams, including dam shoulders, dam bodies and foundations; there are different types of response parameters for the seismic response parameters of the unit body, including the displacement of the unit body, the stress of the unit body and the acceleration of the unit body; different structural types can select different response parameter types to construct safety assessment parameters suitable for the structural type; each structural type corresponds to a structure with multiple units.

[0086] S402. Acquire a response parameter type corresponding to the structural type of the preselected structure according to the seismic response parameters of each of the unit bodies under different earthquake magnitudes, wherein the seismic response parameters of the unit body include a plurality of different response parameter types, and the response parameter type includes the displacement of the unit body and the stress of the unit body.

[0087] According to the structural characteristics of different structural types, confirm the seismic response parameters applicable to the structure; and use the seismic response parameters applicable to the structure as the seismic response parameters of each unit in the structure; for example, sliding may occur between the dam body and the abutment, then displacement is a suitable seismic response parameter for the abutment.

[0088] S403. Obtain the safety assessment parameters according to the type of response parameters corresponding to the preselected structure.

[0089] Different preselected structures correspond to different or the same types of response parameters. According to the data values corresponding to the type of response parameters and the data value limits corresponding to the type of response parameters under the preselected structure, construct the safety assessment parameters; for example, compared with the units in the abutment, if there are too many units with displacement in the abutment and the safety state of the abutment is not good, then the ratio of the units with displacement in the abutment to all the units in the abutment can be constructed as the safety assessment parameter.

[0090] According to actual needs, the structural types of different dams can be selected to construct the safety assessment parameters:

[0091] Exemplarily, the obtaining of the type of response parameters corresponding to the structural type of the preselected structure includes:

[0092] If the structural type of the preselected structure is a sliding surface, the type of response parameter corresponding to the sliding surface is the displacement of the unit; and

[0093] The obtaining of the safety assessment parameters according to the type of response parameters corresponding to the preselected structure includes:

[0094] Obtain the first ratio between the area of the units with displacement in the sliding surface and the area of the sliding surface under different earthquake magnitudes, and obtain the sliding area ratio as the safety assessment parameter.

[0095] If the structural type of the preselected structure is a sliding surface and this sliding surface is at the junction of the abutment and the dam body, the common surface of the units of the abutment and the dam body at this junction can be regarded as a sliding surface. There is one sliding surface on each side of the dam body. The type of response parameter corresponding to the two sliding surfaces is the displacement of the unit; under different earthquake magnitudes, obtain the area of the units with displacement in the sliding surface and obtain the area of all the units in the sliding surface, and calculate the first ratio between the two to obtain the sliding area ratio; this sliding area ratio can be reserved as the safety assessment parameter.

[0096] If the structural type of the preselected structure is a damage crack, the type of response parameter corresponding to the damage crack is the stress of the unit; and

[0097] Obtaining the safety evaluation parameter according to the type of reaction parameter corresponding to the preselected structure includes:

[0098] Obtaining a second ratio between the thickness of the unit body of the damage crack and the thickness of the dam under different earthquake magnitudes, and obtaining a damage thickness ratio as the safety evaluation parameter, where the thickness of the dam is the thickness of the dam at the location of the damage crack along the river direction.

[0099] If the structure type of the preselected structure is a damage crack, this damage crack generally appears at the dam head of the dam body, and may also appear in the dam body. Therefore, it is necessary to confirm the location where the damage crack appears; under different earthquake magnitudes, obtain the thickness of the unit body of the damage crack and the thickness of the dam along the river direction at the location where the damage crack is located, and calculate the second ratio between the two to obtain the damage thickness ratio; this damage thickness ratio can be reserved as a safety evaluation parameter.

[0100] In the embodiments of the present application, by different structure types of the dam, the applicable earthquake response parameters of the dam are confirmed, and a safety evaluation parameter is constructed to facilitate the accurate evaluation of the safety state of the dam.

[0101] Figure 5 It is a schematic flow of a method for evaluating the safety state of a concrete dam provided by the embodiments of the present application Figure 4 As Figure 5 shown, the method includes:

[0102] S501. Confirm the first weight value of the sliding area ratio according to the change trend of the sliding area ratio under different earthquake magnitudes.

[0103] The sliding area ratio is reserved as a safety evaluation parameter, but it may not be used for the final calculation of the safety evaluation value. If it is not used for the final calculation of the safety evaluation value, the first weight value of the sliding area ratio can be taken as zero; whether to retain the sliding area ratio for calculating the safety evaluation value needs to confirm the change trend of the sliding area ratio under different earthquake magnitudes. Taking the earthquake magnitude as the abscissa and the sliding area ratio as the ordinate, find the sliding area ratio at each earthquake magnitude and connect them with a broken line. If the change trend of this broken line is obvious, that is, the broken line has an obvious turning point, then confirm that the sliding area ratio is used for calculating the safety evaluation value.

[0104] S502. Confirm the second weight value of the sliding area ratio according to the change trend of the damage thickness ratio under different earthquake magnitudes.

[0105] The method of whether to retain the damage thickness ratio is the same as the method of whether to retain the sliding area ratio, and will not be elaborated here.

[0106] S503. Obtain the safety evaluation value of the dam according to the sliding area ratio, the first weight, the damage thickness ratio, and the second weight, where the safety evaluation value is used to divide the safety level of the dam. And threshold ranges of displacement, acceleration, joint opening, and other monitoring indicators are given for different safety levels.

[0107] Under different earthquake magnitudes, the sliding area ratio is weighted by the first weight to obtain the first weighted value, and the damage thickness ratio is weighted by the second weight to obtain the second weighted value; obtain the sum value of the first weighted value and the second weighted value to obtain the safety evaluation value under different earthquake magnitudes; and confirm the safety level of the dam according to the specific value of the safety evaluation value under different earthquake magnitudes. For example, if the value of the safety evaluation value is 0.3 - 0.44, the safety level of the dam can be confirmed as mild damage, and the smaller the safety evaluation value, the higher the safety level of the dam and the safer the dam.

[0108] In addition to obtaining the sliding area ratio and the damage thickness ratio, other parameters can also be calculated as safety evaluation parameters. As long as their weights are not zero, they can be retained for actual monitoring:

[0109] Exemplarily, if the first weight is not zero, the method further includes:

[0110] Take the reaction parameter type corresponding to the sliding area ratio corresponding to the first weight as the first monitoring parameter of the dam, where the first monitoring parameter is used to calculate the real-time safety evaluation value of the dam;

[0111] If the second weight is not zero, the method further includes:

[0112] Take the reaction parameter type corresponding to the damage thickness ratio corresponding to the second weight as the second monitoring parameter of the dam, where the second monitoring parameter is used to calculate the real-time safety evaluation value of the dam.

[0113] If the first weight of the sliding area ratio and / or the damage thickness ratio of the reserved parameter is not zero and the weights of other reserved parameters are zero, then the reaction parameter type corresponding to the sliding area ratio and / or the damage thickness ratio can be retained (i.e., displacement and / or stress are appropriate monitoring parameters) for the actual safety evaluation of the dam; after the earthquake, obtain the dam monitoring data, that is, the seismic response parameters of the observable dam, and judge the threshold ranges of the seismic response parameters corresponding to different safety levels of the dam at different water levels. At this time, only calculate the safety evaluation value through the reserved parameter with a non-zero weight, and correspond the value of the safety evaluation value to the above levels to confirm whether the dam is safe. If it is not safe, give the dangerous location in time and take emergency measures; for example, if the safety evaluation value of the dam is too high, the water level can be lowered.

[0114] In the embodiment of the present application, it is determined whether the selected security assessment parameters are to be retained in the security assessment value calculation for security level classification, so as to facilitate accurate security level classification.

[0115] Figure 6 A diagram of a concrete dam safety status assessment device provided by an embodiment of the present invention, such as Figure 6 As shown, the device includes: an acquisition module 601, a first processing module 602, a second processing module 603 and an evaluation module 604;

[0116] The acquisition module 601 is used to acquire the fault parameters around the dam and the path between the dam and the fault according to a preset distance range, wherein the preset distance range is a distance range confirmed according to the dam.

[0117] The first processing module 602 is used to obtain the seismic motion parameters of the dam under different magnitudes through the random finite fault method according to the fault parameters and the path, wherein the seismic motion parameters are physical parameters representing the ground motion caused by an earthquake, and different seismic magnitudes correspond to different seismic motion parameter values.

[0118] The second processing module 603 is used to obtain the seismic response parameters of the dam under different earthquake magnitudes through a finite element model according to the seismic motion parameters of the dam, wherein the seismic response parameters are parameters of the dam that change due to the influence of an earthquake.

[0119] The second processing module 603 is further used to obtain material parameters of a unit body according to the geometric grid of the dam and the material parameters of the dam, wherein the geometric grid includes a plurality of unit bodies, and the seismic response parameters of the unit bodies are associated with the seismic parameters of the dam, the geometric grid and the material parameters of the unit bodies through a preset relationship in the finite element model;

[0120] According to the seismic motion parameters of the dam, the geometric grid and the material parameters of the unit body, the seismic response parameters of each unit body of the dam under different magnitudes are obtained through the finite element model, wherein the seismic response parameters of the dam include the seismic response parameters of multiple unit bodies.

[0121] The evaluation module 604 is used to obtain the safety evaluation parameters of the dam according to the seismic response parameters of the dam and the structural type of the dam.

[0122] The evaluation module 604 is further used to obtain pre-selected structures of the dam, wherein each of the pre-selected structures includes a plurality of the unit bodies, and the pre-selected structures include different structural types of the dam;

[0123] According to the seismic response parameters of each of the unit bodies under different magnitudes, obtain the type of response parameter corresponding to the structural type of the preselected structure, where the seismic response parameters of the unit body include multiple different types of response parameters, and the type of response parameter includes the displacement of the unit body and the stress of the unit body;

[0124] According to the type of response parameter corresponding to the preselected structure, obtain the safety assessment parameter.

[0125] The evaluation module 604 is further configured to obtain the type of response parameter corresponding to the structural type of the preselected structure, including;

[0126] If the structural type of the preselected structure is a slip surface, the type of response parameter corresponding to the slip surface is the displacement of the unit body; and

[0127] The obtaining of the safety assessment parameter according to the type of response parameter corresponding to the preselected structure includes:

[0128] Obtain the first ratio between the area of the unit body that generates displacement in the slip surface and the area of the slip surface under different magnitudes, and obtain the sliding area ratio as the safety assessment parameter;

[0129] If the structural type of the preselected structure is a damage crack, the type of response parameter corresponding to the damage crack is the stress of the unit body; and

[0130] The obtaining of the safety assessment parameter according to the type of response parameter corresponding to the preselected structure includes:

[0131] Obtain the second ratio between the thickness of the unit body of the damage crack and the thickness of the dam under different magnitudes, and obtain the damage thickness ratio as the safety assessment parameter, where the thickness of the dam is the thickness along the river direction at the position of the dam where the damage crack is located.

[0132] The evaluation module 604 is further configured to, after obtaining the safety assessment parameter, the method further includes:

[0133] Confirm the first weight value of the sliding area ratio according to the change trend of the sliding area ratio under different magnitudes;

[0134] Confirm the second weight value of the sliding area ratio according to the change trend of the damage thickness ratio under different magnitudes;

[0135] Obtain the safety assessment value of the dam according to the sliding area ratio, the first weight value, the damage thickness ratio and the second weight value, where the safety assessment value is used to divide the safety level of the dam.

[0136] The present application also provides a concrete dam safety status evaluation device, including: at least one processor and a memory;

[0137] The memory stores computer-executable instructions;

[0138] The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the concrete dam safety status evaluation method.

[0139] Figure 7 It is a hardware schematic diagram of the concrete dam safety status evaluation device provided by the embodiment of the present invention. As Figure 7 shown, the concrete dam safety status evaluation device 70 provided in this embodiment includes: at least one processor 701 and a memory 702. The device 70 also includes a communication component 703. Among them, the processor 701, the memory 702, and the communication component 703 are connected through a bus 704.

[0140] In the specific implementation process, the at least one processor 701 executes the computer-executable instructions stored in the memory 702, so that the at least one processor 701 executes the above method.

[0141] For the specific implementation process of the processor 701, reference can be made to the above method embodiment, and its implementation principle and technical effects are similar, so they will not be elaborated here in this embodiment.

[0142] In the above Figure 7 shown embodiment, it should be understood that the processor may be a central processing unit (English: Central Processing Unit, abbreviated as: CPU), or other general-purpose processors, digital signal processors (English: Digital Signal Processor, abbreviated as: DSP), application specific integrated circuits (English: Application SpecificIntegrated Circuit, abbreviated as: ASIC), etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the invention can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0143] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0144] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience in representation, the buses in the drawings of this application are not limited to only one bus or one type of bus.

[0145] This application also provides a computer-readable storage medium. Computer-executable instructions are stored in the computer-readable storage medium. When the processor executes the computer-executable instructions, the above-described method is implemented.

[0146] For the above-mentioned computer-readable storage medium, the above-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0147] An exemplary readable storage medium is coupled to the processor, enabling the processor to read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an Application Specific Integrated Circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in a device.

[0148] The division of the units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms.

[0149] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0150] Those of ordinary skill in the art can understand that all or part of the steps to implement the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including the above method embodiments; and the foregoing storage medium includes: various media such as ROM, RAM, magnetic disk, or optical disk that can store program codes.

[0151] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily think of other implementation manners of the present invention. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A method for assessing the safety status of a concrete dam, characterized in that: include: According to a preset distance range, acquiring fault parameters around the dam and a path between the dam and the fault, wherein the preset distance range is a distance range confirmed according to the dam; According to the fault parameters and the path, the seismic motion parameters of the dam under different magnitudes are obtained by random finite fault method, wherein the seismic motion parameters are physical parameters representing the ground motion caused by an earthquake, and different seismic magnitudes correspond to different seismic motion parameter values; According to the seismic motion parameters of the dam, the seismic response parameters of the dam under different magnitudes are obtained through a finite element model, wherein the seismic response parameters are parameters of the dam that change under the influence of an earthquake; The safety assessment parameters of the dam are obtained according to the seismic response parameters of the dam and the structural type of the dam.

2. The method according to claim 1, characterized in that The method of obtaining the seismic response parameters of the dam under different earthquake magnitudes by using a finite element model according to the seismic motion parameters of the dam includes: According to the geometrical grid of the dam and the material parameters of the dam, the material parameters of the unit body are obtained, wherein the geometrical grid includes a plurality of unit bodies, and the seismic response parameters of the unit bodies are associated with the seismic parameters of the dam, the geometrical grid and the material parameters of the unit bodies through a preset relational expression in the finite element model; According to the seismic motion parameters of the dam, the geometric grid and the material parameters of the unit body, the seismic response parameters of each unit body of the dam under different magnitudes are obtained through the finite element model, wherein the seismic response parameters of the dam include the seismic response parameters of multiple unit bodies.

3. The method according to claim 2, characterized in that The step of obtaining the safety assessment parameters of the dam according to the seismic response parameters of the dam and the structural type of the dam includes: Acquire preselected structures of the dam, wherein each of the preselected structures includes a plurality of the unit bodies, and the preselected structures include different structural types of the dam; According to the seismic response parameters of each of the unit bodies under different earthquake magnitudes, a response parameter type corresponding to the structural type of the preselected structure is obtained, wherein the seismic response parameters of the unit body include a plurality of different response parameter types, and the response parameter type includes the displacement of the unit body and the stress of the unit body; The safety assessment parameter is obtained according to the reaction parameter type corresponding to the preselected structure.

4. The method according to claim 3, characterized in that The obtaining of the reaction parameter type corresponding to the structure type of the preselected structure includes: If the structural type of the preselected structure is a sliding surface, the reaction parameter type corresponding to the sliding surface is the displacement of the unit body; and The step of obtaining the safety assessment parameter according to the reaction parameter type corresponding to the preselected structure includes: Obtaining a first ratio between the area of ​​a unit body that generates displacement in the sliding surface and the area of ​​the sliding surface under different earthquake magnitudes, and obtaining a sliding area ratio as the safety assessment parameter; If the structural type of the preselected structure is a damage crack, the reaction parameter type corresponding to the damage crack is the stress of the unit cell; and The step of obtaining the safety assessment parameter according to the reaction parameter type corresponding to the preselected structure includes: A second ratio between the thickness of a unit cell of the damage crack and the thickness of the dam under different earthquake magnitudes is obtained to obtain the damage thickness ratio as the safety assessment parameter, wherein the thickness of the dam is the thickness of the dam at the location of the damage crack in the direction of the river.

5. The method according to claim 4, characterized in that After obtaining the security assessment parameter, the method further includes: Determining a first weight of the sliding area ratio according to a variation trend of the sliding area ratio under different earthquake magnitudes; Determining a second weight of the damage thickness ratio according to a variation trend of the damage thickness ratio under different earthquake magnitudes; A safety assessment value of the dam is obtained according to the sliding area ratio, the first weight, the damage thickness ratio and the second weight, wherein the safety assessment value is used to classify the safety level of the dam.

6. The method according to claim 5, characterized in that If the first weight is not zero, the method further includes: Using the reaction parameter type corresponding to the sliding area ratio corresponding to the first weight as a first monitoring parameter of the dam, wherein the first monitoring parameter is used to calculate a real-time safety assessment value of the dam; If the second weight is not zero, the method further includes: The reaction parameter type corresponding to the damage thickness ratio corresponding to the second weight is used as a second monitoring parameter of the dam, wherein the second monitoring parameter is used to calculate a real-time safety assessment value of the dam.

7. The method according to claim 1, characterized in that The method of obtaining the seismic parameters of the dam under different earthquake magnitudes by random finite fault method according to the fault parameters and the path includes: According to the site conditions of the dam, the fault parameters and the path, the seismic motion parameters of the dam under different earthquake magnitudes are obtained by the random finite fault method; wherein the site conditions include the topography and geology of the location of the dam, the fault parameters include the fault location and fault direction, and the seismic motion parameters include the time course of the seismic wave and the response spectrum of the seismic wave.

8. A device for assessing the safety status of a concrete dam, characterized in that: include: An acquisition module, used for acquiring fault parameters around the dam and a path between the dam and the fault according to a preset distance range, wherein the preset distance range is a distance range confirmed according to the dam; A first processing module is used to obtain the seismic motion parameters of the dam under different magnitudes by using a random finite fault method according to the fault parameters and the path, wherein the seismic motion parameters are physical parameters representing the ground motion caused by an earthquake, and different seismic magnitudes correspond to different seismic motion parameter values; A second processing module is used to obtain the seismic response parameters of the dam under different magnitudes through a finite element model according to the seismic motion parameters of the dam, wherein the seismic response parameters are parameters of the dam that change under the influence of an earthquake; The evaluation module is used to obtain the safety evaluation parameters of the dam according to the seismic response parameters of the dam and the structural type of the dam.

9. A concrete dam safety status assessment device, characterized in that: include: at least one processor and memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the method for assessing the safety status of a concrete dam according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for assessing the safety status of a concrete dam as described in any one of claims 1 to 7 are implemented.

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