Method and system for evaluating anti-seismic performance of concrete containment

Abstract

The invention provides a concrete containment seismic performance evaluation method and system, and relates to the technical field of concrete containment seismic performance evaluation. Concrete containment data and stress experiment data are obtained; analyzing the stress experiment data to obtain corrected vertical rigidity, analyzing the concrete containment data and the corrected vertical rigidity to generate concrete containment anti-seismic coefficients, and analyzing the concrete containment anti-seismic coefficients to obtain a comprehensive containment anti-seismic coefficient; and constructing an earthquake response prediction model, and obtaining an earthquake response index according to the earthquake response prediction model. According to the seismic response index and the comprehensive seismic coefficient of the containment vessel, generating a seismic evaluation coefficient of the containment vessel; and completing the evaluation of the anti-seismic performance of the concrete containment according to the anti-seismic evaluation coefficient of the containment. According to the method, the anti-seismic performance and the anti-seismic response performance of the concrete containment are considered, the consideration is comprehensive, and the evaluation result is more scientific.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete containment seismic performance assessment, and in particular to a method and system for assessing the seismic performance of a concrete containment. Background Art

[0002] In key facilities such as nuclear power plants and experimental reactors, concrete containment serves as the first barrier, playing a key role in isolating radioactive materials and preventing external shocks and earthquake disasters. However, existing methods for evaluating the seismic performance of containment have great limitations. On the one hand, traditional evaluation methods are mainly based on finite element simulation or empirical formulas, which cannot fully consider the nonlinear deformation characteristics of the material, resulting in limited accuracy of the evaluation results. On the other hand, current evaluation methods often ignore the complex stress distribution characteristics of the rubber layer under earthquake action, and cannot accurately characterize the actual seismic resistance of the containment. In addition, due to the high uncertainty of seismic response, how to construct an effective seismic response prediction model to improve the reliability of seismic evaluation is still a technical problem that needs to be solved urgently in the industry.

[0003] In the prior art, publication number CN117113509A discloses a method for evaluating the seismic safety risk probability of a prestressed concrete containment, which selects the average tensile damage coefficient of the bottom of the prestressed concrete containment shell as an evaluation index of seismic performance according to the seismic damage mechanism of the prestressed concrete containment; establishes a seismic response model of the prestressed concrete containment; takes the site probability consistent earthquake response spectrum as the target spectrum, selects multiple seismic motion time histories that meet the site characteristics, and modulates each seismic motion time history according to the proportional method; uses the IDA method to analyze the elastoplastic dynamic response of the prestressed concrete containment, and draws an IDA curve cluster; performs statistical analysis on the IDA curve cluster, establishes a seismic vulnerability curve of the prestressed concrete containment, and evaluates the conditional probability of the prestressed concrete containment under different seismic performance limit states under a certain acceleration peak. However, this prior art still has defects. This prior art only focuses on the response performance, which causes the evaluation process to ignore the inherent mechanical properties and physical and chemical properties of concrete itself. In this way, even if the containment shows good response indicators under earthquake action, its long-term durability or hidden damage may occur under multiple cumulative loads, resulting in an overestimation of the seismic performance. Although the response performance intuitively reflects the behavior of the structure under earthquake action, it is often affected by external conditions, applied load history and model parameter sensitivity. Ignoring the intrinsic performance may not fully reveal the seismic mechanism of the structure.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for evaluating the seismic performance of a concrete containment shell to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for evaluating the seismic performance of a concrete containment, comprising the following specific steps: Step 1: obtaining concrete containment data of the concrete containment to be evaluated, applying stress to the concrete containment, and obtaining strain data of the concrete containment; the concrete containment data includes the initial thickness, compression modulus, damping ratio, compressive strength and tensile strength of the rubber layer in the concrete containment; the strain data of the concrete containment includes the vertical compression displacement of the stress application position of the rubber layer and the stress distribution of the cross section of the rubber layer; Step 2: Analyze the stress distribution of the rubber layer cross section to obtain stress distribution characteristic data; Analyze the stress distribution characteristic data to obtain the morphological correction factor and obtain the initial vertical stiffness of the concrete containment; According to the concrete containment data, the vertical compression displacement of the rubber layer stress application position and the morphological correction factor, correct the initial vertical stiffness to generate the corrected vertical stiffness; Step 3: Analyze the concrete containment data and the modified vertical stiffness to generate the concrete containment seismic coefficient; apply different stresses to the concrete containment and obtain the corresponding containment seismic coefficients; analyze the containment seismic coefficients under all stresses to generate the comprehensive containment seismic coefficient; Step 4: Obtain multiple sample concrete containments with known comprehensive seismic coefficients of containments, and conduct seismic tests on them to obtain the seismic response index of the sample concrete containments under the corresponding seismic spectrum acceleration, and construct a seismic response prediction model with the comprehensive seismic coefficient of the containment and the seismic spectrum acceleration as inputs and the seismic response index as a label; obtain the local maximum seismic spectrum acceleration at the location of the concrete containment to be evaluated, and input it and the comprehensive seismic coefficient of the containment of the concrete containment to be evaluated into the seismic response prediction model; obtain the seismic response index; the seismic response index includes the maximum structural yield displacement, the average structural yield displacement and the proportion of plastic deformation; Step 5: Generate the containment seismic assessment coefficient based on the earthquake response index and the comprehensive seismic coefficient of the containment; complete the assessment of the seismic performance of the concrete containment based on the containment seismic assessment coefficient.

[0007] Furthermore, the stress distribution is obtained through a high-resolution stress sensitive film; the stress distribution characteristic data includes an effective stress area, a position variance of an effective stress boundary, and a real area difference; a stress threshold is preset, and a position where the stress is equal to the stress threshold is defined as an effective stress boundary, and a distance from the effective stress boundary to a position where stress is applied is an effective stress boundary distance; and a specific formula for calculating the effective stress boundary is: ; in, is the position variance of the effective stress boundary, is the stress boundary number, For the The effective stress boundary distance, is the average effective stress boundary distance; The cross section of the rubber layer is divided into an effective stress area and an invalid stress area by the effective stress boundary; the area where the stress is greater than the stress threshold is the effective stress area, and the area of ​​the effective stress area is the effective stress area. A circle is made with the stress application point as the center and the average effective stress boundary distance as the radius. The overlapping sector area of ​​the circle and the cross section of the rubber layer is called the ideal effective area. The specific formula for calculating the difference in the actual area is: ; in, is the actual area difference, is the effective stress area, is the ideal effective area.

[0008] Furthermore, the effective stress area, the position variance of the effective stress boundary, and the actual area difference are analyzed to generate the morphological correction factor. The specific formula for calculating the morphological correction factor is: ; in, is the shape correction factor.

[0009] Furthermore, the specific logic for generating the modified vertical stiffness is as follows: construct a strain mathematical model, The strain mathematical model is expressed as: ; in, To apply stress, is the compression modulus of the rubber layer in the concrete containment, is the modulus increment factor, is the vertical compressive displacement at the stress application location, and are model parameters, which are fitted by experimental data; According to the concrete containment data, the vertical compression displacement of the rubber layer stress application position, the modulus increment factor, the shape correction factor and the initial vertical stiffness generate the modified vertical stiffness. The specific formula for generating the modified vertical stiffness is: ; in, To correct the vertical stiffness, is the initial vertical stiffness, is the effective stress area, is the cross-sectional area of ​​the rubber layer, is the morphology correction factor, is the vertical compressive displacement at the stress application location, is the initial thickness of the rubber layer, is the compression modulus, is the modulus increment factor.

[0010] Furthermore, the specific logic for generating the seismic coefficient of the concrete containment is: the seismic coefficient of the concrete containment is generated according to the modified vertical stiffness, the damping ratio of the rubber layer, the compressive strength and the tensile strength, and the specific formula is: ; in, is the seismic coefficient of the concrete containment, To correct the vertical stiffness, is the damping ratio of the rubber layer in the concrete containment, is the tensile strength of the rubber layer in the concrete containment, is the compressive strength of the rubber layer in the concrete containment; Obtain the seismic coefficient of the concrete containment under various stresses, take the applied stress as input and the seismic coefficient of the concrete containment as the label, train the concrete containment performance prediction model, obtain the maximum stress borne by the historical concrete containment, and predict the concrete containment performance through the concrete containment performance prediction model. The seismic coefficient of the concrete containment under different stresses is analyzed, and the predicted seismic coefficient of the concrete containment is generated to generate the comprehensive seismic coefficient of the containment; the magnitude of the stress applied each time is: ; in, For the The stress applied, is the maximum stress borne by the historical concrete containment. is the total number of stresses applied, is the index of applied stress, and .

[0011] The specific formula for generating the comprehensive seismic coefficient of the containment is: ; in, is the comprehensive seismic coefficient of the containment, For the times the seismic resistance coefficient of the concrete containment.

[0012] Furthermore, the specific formula for generating the containment seismic assessment coefficient is as follows: ; in, is the containment seismic assessment factor, is the comprehensive seismic coefficient of the containment, is the maximum structural yield displacement, is the average structural yield displacement, is the percentage of plastic deformation. Furthermore, the containment seismic assessment threshold is preset. , then the concrete containment shell has qualified seismic performance. , then the seismic performance of the concrete containment is unqualified; in, is the containment seismic assessment factor, is the containment seismic assessment threshold.

[0013] The present invention further provides a concrete containment shell seismic performance evaluation system, the system is used to implement the concrete containment shell seismic performance evaluation method, specifically comprising: A data acquisition module, used to obtain concrete containment data of the concrete containment to be evaluated, apply stress to the concrete containment, and obtain strain data of the concrete containment; the concrete containment data includes the initial thickness, compression modulus, damping ratio, compressive strength and tensile strength of the rubber layer in the concrete containment; the strain data of the concrete containment includes the vertical compression displacement of the rubber layer stress application position and the stress distribution of the rubber layer cross section; The stiffness correction module is used to analyze the stress distribution of the rubber layer cross section to obtain stress distribution characteristic data; analyze the stress distribution characteristic data to obtain the shape correction factor and obtain the initial vertical stiffness of the concrete containment; according to the concrete containment data, the vertical compression displacement of the rubber layer stress application position and the shape correction factor, the initial vertical stiffness is corrected to generate the corrected vertical stiffness; Performance analysis module, used to analyze the concrete containment data and modified vertical stiffness to generate the concrete containment seismic coefficient; apply different stresses to the concrete containment and obtain the corresponding containment seismic coefficient, analyze the containment seismic coefficient under all stresses, and generate the comprehensive containment seismic coefficient; A model building module is used for multiple sample concrete containments with known comprehensive seismic coefficients of containments, and seismic tests are performed on them to obtain seismic response indicators of the sample concrete containments under corresponding seismic spectrum accelerations, and a seismic response prediction model is constructed with the comprehensive seismic coefficient of the containment and the seismic spectrum acceleration as inputs and the seismic response indicator as a label; the local maximum seismic spectrum acceleration of the location of the concrete containment to be evaluated is obtained, and it is input into the seismic response prediction model together with the comprehensive seismic coefficient of the containment of the concrete containment to be evaluated; the seismic response indicator is obtained; the seismic response indicator includes the maximum structural yield displacement, the average structural yield displacement and the proportion of plastic deformation; The performance evaluation module is used to generate a containment seismic evaluation coefficient based on the seismic response index and the comprehensive seismic coefficient of the containment; and to complete the evaluation of the seismic performance of the concrete containment based on the seismic evaluation coefficient of the containment.

[0014] Compared with the prior art, the present invention has the following beneficial effects: Vertical stiffness reflects the vertical deformation performance of the concrete containment and is an important indicator for studying seismic performance. The present invention obtains a more accurate vertical stiffness through correction, and generates a comprehensive seismic coefficient of the containment in combination with the property parameters of the concrete containment, and generates a seismic evaluation coefficient of the containment in combination with the seismic response index. This not only overcomes the limitation of traditional technology that only focuses on response performance and ignores the intrinsic material performance, but also more accurately reveals the true seismic resistance of the structure under earthquake action, making the evaluation of seismic performance more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall method flow of the present invention.

[0016] Figure 2 It is a schematic diagram of the overall system structure of the present invention. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0018] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example: See also Figure 1 , the present invention provides a technical solution: A method for evaluating the seismic performance of a concrete containment, comprising the following specific steps: Step 1: obtaining concrete containment data of the concrete containment to be evaluated, applying stress to the concrete containment, and obtaining strain data of the concrete containment; the concrete containment data includes the initial thickness, compression modulus, damping ratio, compressive strength and tensile strength of the rubber layer in the concrete containment; the strain data of the concrete containment includes the vertical compression displacement of the stress application position of the rubber layer and the stress distribution of the cross section of the rubber layer; The concrete containment data can be directly obtained by referring to the instructions of the concrete containment; Step 2: Analyze the stress distribution of the rubber layer cross section to obtain stress distribution characteristic data; Analyze the stress distribution characteristic data to obtain the morphological correction factor and obtain the initial vertical stiffness of the concrete containment; According to the concrete containment data, the vertical compression displacement of the rubber layer stress application position and the morphological correction factor, correct the initial vertical stiffness to generate the corrected vertical stiffness; The stress distribution is obtained through a high-resolution stress sensitive film; the stress distribution characteristic data includes the effective stress area, the position variance of the effective stress boundary, and the actual area difference; a stress threshold is preset, and the position where the stress is equal to the stress threshold is defined as the effective stress boundary, and the distance from the effective stress boundary to the stress application position is the effective stress boundary distance; the specific formula for calculating the effective stress boundary is: ; in, is the position variance of the effective stress boundary, is the stress boundary number, For the The effective stress boundary distance, is the average effective stress boundary distance; The cross section of the rubber layer is divided into an effective stress area and an invalid stress area by the effective stress boundary; the area where the stress is greater than the stress threshold is the effective stress area, and the area of ​​the effective stress area is the effective stress area. A circle is made with the stress application point as the center and the average effective stress boundary distance as the radius. The overlapping sector area of ​​the circle and the cross section of the rubber layer is called the ideal effective area. The specific formula for calculating the difference in the actual area is: ; in, is the actual area difference, is the effective stress area, is the ideal effective area.

[0020] The effective stress area, the position variance of the effective stress boundary, and the actual area difference are analyzed to generate the morphological correction factor. The specific formula for calculating the morphological correction factor is: ; in, is the shape correction factor.

[0021] The morphology correction factor reflects the closeness of the stress distribution morphology of the rubber layer to the ideal state. Its value range is usually from 0 to 1. The closer the value is to 1, the closer the actual stress distribution is to the ideal state and the more "perfect" the morphology is; the smaller the value is, the greater the deviation is, and the actual stress distribution has greater irregularities or local deficiencies. It reflects the difference between the effective stress distribution and the ideal situation. The larger the value, the greater the difference between the effective stress distribution and the ideal situation, and the less close to the "perfection" in morphology. The position variance of the effective stress boundary reflects the discreteness or irregularity of the stress boundary position. The larger the variance, the more uneven the boundary distribution. The exponential function is used to ensure that when the irregularity increases, the morphology correction factor can decrease smoothly and monotonically, and at the same time ensure that the morphology correction factor is always positive.

[0022] The specific logic for generating the modified vertical stiffness is as follows: construct a strain mathematical model, The strain mathematical model is expressed as: ; in, To apply stress, is the compression modulus of the rubber layer in the concrete containment, is the modulus increment factor, is the vertical compressive displacement at the stress application location, and is the model parameter, which is fitted by experimental data; the modulus increment factor is a constant used to calibrate the hardening effect of the material in the large strain area; it is obtained by fitting a large amount of experimental data through the least squares method; the experimental data includes applied stress, compression modulus and is the vertical compression displacement; it is obtained by fitting a large amount of experimental data using the least squares method. and It is a prior art, and the above experimental data can be directly input into the least squares analysis software; the least squares analysis software includes but is not limited to MATLAB, Origin and Python.

[0023] The initial vertical stiffness can be directly obtained through theoretical calculation, and the specific formula is: ; is the initial vertical stiffness, is the initial thickness of the rubber layer, is the compression modulus, is the contact area between the horizontal surface of the rubber layer and the pressure applying device; The initial vertical stiffness calculated by this method only considers the inherent elasticity and geometric parameter factors of the material; however, when the rubber layer is subjected to stress, vertical compression displacement will occur, and the cross-sectional area will also change, resulting in changes in the vertical stiffness; therefore, further correction data is required, that is, the vertical compression displacement at the stress application position of the rubber layer, the modulus increment factor, the morphology correction factor and the initial vertical stiffness are used to generate the corrected vertical stiffness. The specific formula for generating the corrected vertical stiffness is: ; in, To correct the vertical stiffness, is the initial vertical stiffness, is the effective stress area, is the cross-sectional area of ​​the rubber layer, is the morphology correction factor, is the vertical compressive displacement at the stress application location, is the initial thickness of the rubber layer, is the compression modulus, is the modulus increment factor.

[0024] Vertical stiffness reflects the vertical deformation performance of the concrete containment and is the key mechanical performance index for the concrete containment to achieve vertical seismic isolation. The larger the value, the better the seismic isolation effect of the concrete containment. When the rubber layer is subjected to stress, vertical compression displacement will occur, and the cross-sectional area will also change, resulting in changes in the vertical stiffness. The calculation and correction of the vertical stiffness is to obtain the vertical stiffness more accurately, thereby completing an accurate assessment of the seismic performance of the concrete containment. The initial vertical stiffness is the benchmark for vertical stiffness correction. The morphology correction factor reflects the degree of closeness between the effective stress boundary distribution morphology of the rubber layer and the ideal state. The smaller the value, the greater the deviation. The actual stress distribution has large irregularities or local deficiencies. The more the vertical stiffness is reduced, the greater the degree of correction required. It reflects the closeness between the internal comprehensive distribution of effective stress in the rubber layer and the ideal distribution. The larger the value, the greater the correction required. and By studying the area of ​​effective stress and the deviation of the boundary from the ideal situation, the degree to which the vertical stiffness needs to be corrected is shown, so they are coupled to form , used to comprehensively reflect the vertical stiffness correction strength caused by stress distribution; It reflects the change in stiffness caused by the deformation of the concrete containment surface. The larger the value, the greater the correction required. The modulus increment factor reflects the hardening effect of the material in the large strain area. The larger the value, the less obvious the hardening effect of the material in the large strain area, the easier it is for the compression modulus of the material to change, and the greater the correction required for the vertical stiffness. The minus sign is added in front because all the above changes will result in a decrease in vertical stiffness, thereby reducing seismic performance.

[0025] Step 3: Analyze the concrete containment data and the modified vertical stiffness to generate the concrete containment seismic coefficient; apply different stresses to the concrete containment and obtain the corresponding containment seismic coefficients; analyze the containment seismic coefficients under all stresses to generate the comprehensive containment seismic coefficient; The specific logic for generating the seismic coefficient of the concrete containment is: the seismic coefficient of the concrete containment is generated according to the modified vertical stiffness, the damping ratio of the rubber layer, the compressive strength and the tensile strength. The specific formula is: ; in, is the seismic coefficient of the concrete containment, To correct the vertical stiffness, is the damping ratio of the rubber layer in the concrete containment, is the tensile strength of the rubber layer in the concrete containment, is the compressive strength of the rubber layer in the concrete containment; The seismic coefficient of the concrete containment comprehensively reflects the seismic performance of the containment under constant stress. The larger the value, the better the seismic performance. The generation of this coefficient can provide an important basis for the evaluation of comprehensive seismic performance. Vertical stiffness reflects the vertical deformation performance of the concrete containment and is the key mechanical performance index for the concrete containment to achieve vertical seismic isolation. The larger its value, the better the vertical deformation performance of the concrete containment, the better the seismic performance, and the more accurate the modified vertical stiffness. As a pre-factor of the product term, for Provides a rigid foundation. It shows that the containment has a strong supporting capacity under vertical load. The damping ratio of the rubber layer in the concrete containment is the energy dissipation capacity of the rubber layer during the force process. The higher the damping ratio, the more the rubber layer can absorb and attenuate the received energy, thereby achieving the purpose of shock absorption. Therefore, the larger the value, the better the shock absorption effect; and Respectively reflect the material bearing capacity of the rubber layer under tension and compression. The larger the value, the greater the pull and compression that the material can bear, and the better the shock absorption performance. The geometric mean This method can simultaneously reflect the overall mechanical properties of the rubber material under two stress modes.

[0026] Obtain the seismic coefficient of the concrete containment under various stresses, take the applied stress as input and the seismic coefficient of the concrete containment as the label, train the concrete containment performance prediction model, obtain the maximum stress borne by the historical concrete containment, and predict the concrete containment performance through the concrete containment performance prediction model. The seismic coefficient of the concrete containment under different stresses is analyzed to generate the comprehensive seismic coefficient of the containment; Concrete may be damaged when subjected to large stress. Therefore, in order to avoid damage to the concrete containment shell when applying stress, only the stress that the concrete containment shell can withstand is applied. However, if only the stress that the concrete containment shell can withstand is considered, the evaluation result will be inaccurate. Therefore, this embodiment trains a concrete containment shell performance prediction model to obtain the seismic coefficient of the concrete containment shell when the stress is greater than the concrete containment shell's bearing capacity; The concrete containment performance prediction model adopts a feedforward neural network, with applied stress as input and the corresponding concrete containment seismic coefficient as a label. The existing technologies for training the concrete containment performance prediction model include: Input layer, hidden layer, output layer and activation function, the input layer is responsible for receiving the applied stress; the hidden layer is used to process the meteorological data; it is composed of multiple layers, each layer contains multiple time nodes, and the time node of each hidden layer is connected to the previous layer through weights, which is used to perform feature abstraction and nonlinear transformation on the input applied stress; by using the ReLu activation function, the nonlinear relationship is introduced so that the model can fit complex feature relationships; an independent neuron is set in the output layer, which is responsible for converting the local and high-level feature representations extracted by the hidden layer to output the seismic coefficient of the concrete containment; the root mean square error loss function is adopted; the input data is calculated once through the network to obtain the output result, and the loss function is calculated according to the predicted value and the true value. The gradient of the loss function for each weight and bias is calculated by the chain rule, and the weights and biases of the network are updated using the gradient descent algorithm to minimize the loss function.

[0027] The magnitude of the stress applied each time is: ; in, For the The stress applied, is the maximum stress borne by the historical concrete containment. is the total number of stresses applied, is the index of applied stress, and .

[0028] The specific formula for generating the comprehensive seismic coefficient of the containment is: ; in, is the comprehensive seismic coefficient of the containment, For the times the seismic resistance coefficient of the concrete containment.

[0029] For the above The weighted average calculation of the concrete containment seismic coefficients of the stresses applied for the first time generates the comprehensive seismic coefficient of the containment, which reflects the overall seismic performance of the concrete containment under different stress conditions. The higher the comprehensive seismic coefficient, the better the overall seismic resistance of the containment under various stress conditions. The generation of this coefficient plays an important role in the evaluation of the seismic performance of the concrete containment.

[0030] Step 4: Obtain multiple sample concrete containments with known comprehensive seismic coefficients of containments, and conduct seismic tests on them to obtain the seismic response index of the sample concrete containments under the corresponding seismic spectrum acceleration, and construct a seismic response prediction model with the comprehensive seismic coefficient of the containment and the seismic spectrum acceleration as inputs and the seismic response index as a label; obtain the local maximum seismic spectrum acceleration at the location of the concrete containment to be evaluated, and input it and the comprehensive seismic coefficient of the containment of the concrete containment to be evaluated into the seismic response prediction model; obtain the seismic response index; the seismic response index includes the maximum structural yield displacement, the average structural yield displacement and the proportion of plastic deformation; The seismic response index is obtained by arranging stress sensors and displacement sensors at the ends of concrete containment components, the areas where plastic hinges are expected to be formed, and the main stress nodes; the displacements collected at the ends of concrete containment components, the areas where plastic hinges are expected to be formed, and the main stress nodes are collected by the displacement sensors; the stresses received at the ends of concrete containment components, the areas where plastic hinges are expected to be formed, and the main stress nodes are collected by the stress sensors; a stress-displacement relationship diagram is established with displacement as the horizontal axis and stress as the vertical axis; a stress-displacement slope threshold is preset, and the displacement when the first stress-displacement slope is equal to the stress-displacement slope threshold is recorded, which is recorded as the structural yield displacement; the maximum value and average value of the structural yield displacement at each position are taken as the maximum structural yield displacement and the average structural yield displacement; The plastic deformation ratio is the ratio of the area where the plastic deformation occurs on the plastic surface of the concrete containment shell to the surface area of ​​the concrete containment shell after the seismic test.

[0031] The earthquake response prediction model is composed of a deep learning network based on a multi-layer perceptron, wherein the deep neural network of the multi-layer perceptron includes an input layer, a hidden layer and an output layer, wherein each of the hidden layers has at least 4 neurons and each uses ReLU as an activation function; The process of training the earthquake response prediction model is as follows: The comprehensive seismic coefficients of different containment shells and earthquake spectral accelerations are used as input, and the maximum structural yield displacement, average structural yield displacement and plastic deformation ratio are used as output labels for training. The mean square error is used as the loss function. When the mean square error is When the particle size is within the range, the training of the granularity prediction model is completed.

[0032] Step 5: Generate the containment seismic assessment coefficient based on the earthquake response index and the comprehensive seismic coefficient of the containment; complete the assessment of the seismic performance of the concrete containment based on the containment seismic assessment coefficient.

[0033] The specific formula for generating the containment seismic assessment coefficient is: ; in, is the containment seismic assessment factor, is the comprehensive seismic coefficient of the containment, is the maximum structural yield displacement, is the average structural yield displacement, is the proportion of plastic deformation.

[0034] The containment shell seismic assessment coefficient comprehensively reflects the seismic performance of the concrete containment shell under the actual earthquake motion; it reflects the inherent seismic bearing and deformation capacity of the containment shell. The larger its value is, the stronger the inherent seismic bearing and deformation capacity of the containment shell is, and the better the overall seismic effect is. The average structural yield displacement is the average yield displacement value of the structure at each position reaching the yield state, and the maximum structural yield displacement refers to the maximum displacement of the structure when it reaches the yield state during an earthquake. A smaller yield displacement helps to avoid excessive deformation and damage to the rubber layer, thereby reducing the seismic performance. Therefore, the smaller the values ​​of the two are, the better the seismic performance of the concrete containment shell. The present invention achieves this by The maximum structural yield displacement and the average structural yield displacement are coupled in a way to describe the material's anti-deformation ability. The larger the value, the weaker the material's anti-deformation ability. Set as the denominator. The plastic deformation ratio reflects the ratio of the plastic deformation area on the surface of the concrete containment after vibration. The larger the value, the higher the ratio of the plastic deformation area on the surface of the concrete containment. Due to the irreversibility of plastic deformation, the plastic deformation of the concrete containment will accumulate, causing irreversible damage accumulation. Therefore, the smaller the plastic deformation ratio after the seismic test, the better the seismic performance of the concrete containment. Preset containment seismic assessment threshold, if , then the concrete containment shell has qualified seismic performance. , then the seismic performance of the concrete containment is unqualified; in, is the containment seismic assessment factor, is the containment seismic assessment threshold.

[0035] See also Figure 2 The present invention further provides a concrete containment shell seismic performance evaluation system, the system is used to implement the concrete containment shell seismic performance evaluation method, specifically comprising: A data acquisition module, used to obtain concrete containment data of the concrete containment to be evaluated, apply stress to the concrete containment, and obtain strain data of the concrete containment; the concrete containment data includes the initial thickness, compression modulus, damping ratio, compressive strength and tensile strength of the rubber layer in the concrete containment; the strain data of the concrete containment includes the vertical compression displacement of the rubber layer stress application position and the stress distribution of the rubber layer cross section; The stiffness correction module is used to analyze the stress distribution of the rubber layer cross section to obtain stress distribution characteristic data; analyze the stress distribution characteristic data to obtain the shape correction factor and obtain the initial vertical stiffness of the concrete containment; according to the concrete containment data, the vertical compression displacement of the rubber layer stress application position and the shape correction factor, the initial vertical stiffness is corrected to generate the corrected vertical stiffness; Performance analysis module, used to analyze the concrete containment data and modified vertical stiffness to generate the concrete containment seismic coefficient; apply different stresses to the concrete containment and obtain the corresponding containment seismic coefficient, analyze the containment seismic coefficient under all stresses, and generate the comprehensive containment seismic coefficient; A model building module is used for multiple sample concrete containments with known comprehensive seismic coefficients of containments, and seismic tests are performed on them to obtain seismic response indicators of the sample concrete containments under corresponding seismic spectrum accelerations, and a seismic response prediction model is constructed with the comprehensive seismic coefficient of the containment and the seismic spectrum acceleration as inputs and the seismic response indicator as a label; the local maximum seismic spectrum acceleration of the location of the concrete containment to be evaluated is obtained, and it is input into the seismic response prediction model together with the comprehensive seismic coefficient of the containment of the concrete containment to be evaluated; the seismic response indicator is obtained; the seismic response indicator includes the maximum structural yield displacement, the average structural yield displacement and the proportion of plastic deformation; The performance evaluation module is used to generate a containment seismic evaluation coefficient based on the seismic response index and the comprehensive seismic coefficient of the containment; and to complete the evaluation of the seismic performance of the concrete containment based on the seismic evaluation coefficient of the containment.

[0036] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0037] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented by software, the above embodiments may be implemented in whole or in part in the form of a computer program product. Those skilled in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software methods depends on the specific application and design constraints of the technical solution.

[0038] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0039] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technical personnel familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A method for evaluating the seismic performance of a concrete containment, characterized in that: The specific steps include: Step 1: obtaining concrete containment data of the concrete containment to be evaluated, applying stress to the concrete containment, and obtaining strain data of the concrete containment; the concrete containment data includes the initial thickness, compression modulus, damping ratio, compressive strength and tensile strength of the rubber layer in the concrete containment; the strain data of the concrete containment includes the vertical compression displacement of the stress application position of the rubber layer and the stress distribution of the cross section of the rubber layer; Step 2: Analyze the stress distribution of the rubber layer cross section to obtain stress distribution characteristic data; Analyze the stress distribution characteristic data to obtain the morphological correction factor and obtain the initial vertical stiffness of the concrete containment; Correct the initial vertical stiffness according to the concrete containment data, the vertical compression displacement of the rubber layer stress application position and the morphological correction factor to generate the corrected vertical stiffness; Step 3: Analyze the concrete containment data and the modified vertical stiffness to generate the concrete containment seismic coefficient; apply different stresses to the concrete containment and obtain the corresponding containment seismic coefficients; analyze the containment seismic coefficients under all stresses to generate the comprehensive containment seismic coefficient; Step 4: Obtain multiple sample concrete containments with known comprehensive seismic coefficients of containments, and conduct seismic tests on them to obtain the seismic response index of the sample concrete containments under the corresponding seismic spectrum acceleration, and construct a seismic response prediction model with the comprehensive seismic coefficient of the containment and the seismic spectrum acceleration as inputs and the seismic response index as a label; obtain the local maximum seismic spectrum acceleration at the location of the concrete containment to be evaluated, and input it and the comprehensive seismic coefficient of the containment of the concrete containment to be evaluated into the seismic response prediction model; obtain the seismic response index; the seismic response index includes the maximum structural yield displacement, the average structural yield displacement and the proportion of plastic deformation; Step 5: Generate the containment seismic assessment coefficient based on the earthquake response index and the comprehensive seismic coefficient of the containment; complete the assessment of the seismic performance of the concrete containment based on the containment seismic assessment coefficient.

2. A method for evaluating the seismic performance of a concrete containment shell according to claim 1, characterized in that: The stress distribution is obtained through a high-resolution stress sensitive film; The stress distribution characteristic data include effective stress area, position variance of effective stress boundary, and actual area difference; The stress threshold is preset, and the position where the stress is equal to the stress threshold is defined as the effective stress boundary. The distance from the effective stress boundary to the stress application position is the effective stress boundary distance. The specific formula for calculating the position variance of the effective stress boundary is: ； in, is the position variance of the effective stress boundary, is the stress boundary number, For the The effective stress boundary distance, is the average effective stress boundary distance; The cross section of the rubber layer is divided into an effective stress area and an invalid stress area by the effective stress boundary; the area where the stress is greater than the stress threshold is the effective stress area, and the area of ​​the effective stress area is the effective stress area. A circle is made with the stress application position as the center and the average effective stress boundary distance as the radius. The overlapping sector area of ​​the circle and the cross section of the rubber layer is called the ideal effective area. The specific formula for calculating the difference in the actual area is: ； in, is the actual area difference, is the effective stress area, is the ideal effective area.

3. A method for evaluating the seismic performance of a concrete containment shell according to claim 2, characterized in that: The effective stress area, the position variance of the effective stress boundary, and the actual area difference are analyzed to generate the morphological correction factor. The specific formula for calculating the morphological correction factor is: ； in, is the shape correction factor.

4. A method for evaluating the seismic performance of a concrete containment shell according to claim 3, characterized in that: The specific logic for generating the modified vertical stiffness is as follows: construct a strain mathematical model, The strain mathematical model is expressed as: ； in, To apply stress, is the compression modulus of the rubber layer in the concrete containment, is the modulus increment factor, is the vertical compressive displacement at the stress application location, and are model parameters, which are fitted by experimental data; According to the concrete containment data, the vertical compression displacement of the rubber layer stress application position, the modulus increment factor, the shape correction factor and the initial vertical stiffness generate the modified vertical stiffness. The specific formula for generating the modified vertical stiffness is: ； in, To correct the vertical stiffness, is the initial vertical stiffness, is the effective stress area, is the cross-sectional area of ​​the rubber layer, is the morphology correction factor, is the vertical compressive displacement at the stress application location, is the initial thickness of the rubber layer, is the compression modulus, is the modulus increment factor.

5. A method for evaluating the seismic performance of a concrete containment shell according to claim 1, characterized in that: The specific logic for generating the seismic coefficient of the concrete containment is: the seismic coefficient of the concrete containment is generated according to the modified vertical stiffness, the damping ratio of the rubber layer, the compressive strength and the tensile strength. The specific formula is: ； in, is the seismic coefficient of the concrete containment, To correct the vertical stiffness, is the damping ratio of the rubber layer, is the tensile strength of the rubber layer in the concrete containment, is the compressive strength of the rubber layer in the concrete containment; Obtain the seismic coefficient of the concrete containment under various stresses, take the applied stress as input and the seismic coefficient of the concrete containment as the label, train the concrete containment performance prediction model, obtain the maximum stress borne by the historical concrete containment, and predict the concrete containment performance through the concrete containment performance prediction model. The seismic coefficient of the concrete containment under different stresses is analyzed, and the predicted seismic coefficient of the concrete containment is generated to generate the comprehensive seismic coefficient of the containment; the magnitude of the stress applied each time is: ； in, For the The stress applied, is the maximum stress borne by the historical concrete containment. is the total number of stresses applied, is the index of applied stress, and ; The specific formula for generating the comprehensive seismic coefficient of the containment is: ； in, is the comprehensive seismic coefficient of the containment, For the times the seismic resistance coefficient of the concrete containment.

6. A method for evaluating the seismic performance of a concrete containment shell according to claim 1, characterized in that: The specific formula for generating the containment seismic assessment coefficient is: ； in, is the containment seismic assessment factor, is the comprehensive seismic coefficient of the containment, is the maximum structural yield displacement, is the average structural yield displacement, is the proportion of plastic deformation.

7. A method for evaluating the seismic performance of a concrete containment shell according to claim 1, characterized in that: Preset containment seismic assessment threshold, if , then the concrete containment shell has qualified seismic performance. , then the seismic performance of the concrete containment is unqualified; in, is the containment seismic assessment factor, is the containment seismic assessment threshold.

8. A concrete containment seismic performance assessment system, characterized in that: The system is used to implement the method for evaluating the seismic performance of a concrete containment shell according to any one of claims 1 to 7, and specifically comprises: A data acquisition module, used to obtain concrete containment data of the concrete containment to be evaluated, apply stress to the concrete containment, and obtain strain data of the concrete containment; the concrete containment data includes the initial thickness, compression modulus, damping ratio, compressive strength and tensile strength of the rubber layer in the concrete containment; the strain data of the concrete containment includes the vertical compression displacement of the rubber layer stress application position and the stress distribution of the rubber layer cross section; The stiffness correction module is used to analyze the stress distribution of the rubber layer cross section to obtain stress distribution characteristic data; analyze the stress distribution characteristic data to obtain the shape correction factor and obtain the initial vertical stiffness of the concrete containment; according to the concrete containment data, the vertical compression displacement of the rubber layer stress application position and the shape correction factor, the initial vertical stiffness is corrected to generate the corrected vertical stiffness; Performance analysis module, used to analyze the concrete containment data and modified vertical stiffness to generate the concrete containment seismic coefficient; apply different stresses to the concrete containment and obtain the corresponding containment seismic coefficient, analyze the containment seismic coefficient under all stresses, and generate the comprehensive containment seismic coefficient; A model building module is used for multiple sample concrete containments with known comprehensive seismic coefficients of containments, and seismic tests are performed on them to obtain seismic response indicators of the sample concrete containments under corresponding seismic spectrum accelerations, and a seismic response prediction model is constructed with the comprehensive seismic coefficient of the containment and the seismic spectrum acceleration as inputs and the seismic response indicator as a label; the local maximum seismic spectrum acceleration of the location of the concrete containment to be evaluated is obtained, and it is input into the seismic response prediction model together with the comprehensive seismic coefficient of the containment of the concrete containment to be evaluated; the seismic response indicator is obtained; the seismic response indicator includes the maximum structural yield displacement, the average structural yield displacement and the proportion of plastic deformation; The performance evaluation module is used to generate a containment seismic evaluation coefficient based on the seismic response index and the comprehensive seismic coefficient of the containment; and to complete the evaluation of the seismic performance of the concrete containment based on the seismic evaluation coefficient of the containment.

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