Method for analyzing dynamic response index of concrete arch dam structure influenced by earthquake

Abstract

The invention discloses a method for analyzing dynamic response indexes of a concrete arch dam structure influenced by earthquakes, which comprises the following steps of: acquiring various displacement response and stress response indexes of a concrete arch dam in each unit time and damage indexes of a working state of the concrete arch dam in each unit time by various data acquisition sensors; the collected data is stored and sent to the engineer data centralized control center; performing normalization processing on the data, and mapping the data of different physical quantity outlines to the same numerical range; according to the structural characteristics of the concrete arch dam, the arch dam is divided into different nodes, and a node feature matrix is constructed; and if the multiple displacement response and stress response indexes and the damage indexes are not in the preset safety limit boundary conditions, generating a concrete arch dam to-be-maintained and repaired instruction, and feeding back the instruction to the concrete arch dam structure safety analysis model interface through the multi-modal data centralized control server. The to-be-maintained and repaired instruction of the concrete arch dam can be sent out in time, and the analysis efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of safety analysis of concrete arch dam structures, and particularly to a method for analyzing dynamic response indexes of concrete arch dam structures affected by earthquakes. Background Art

[0002] In today's engineering field, concrete arch dams, as important water conservancy project buildings, play key roles such as flood control and power generation. However, due to their geographical locations, they are often threatened by natural disasters such as earthquakes. Therefore, it is particularly important to accurately analyze the structural dynamic response under earthquake influence. By deeply understanding the changes in various indexes such as displacement, stress, and damage of the arch dam under earthquake action, engineers can evaluate the safety of the arch dam structure and take corresponding measures in a timely manner to ensure its stable operation. This is the important background for carrying out research on such analysis methods.

[0003] Most of the existing methods for analyzing dynamic response indexes of concrete arch dam structures rely on traditional mechanical models and limited measured data for calculation and evaluation. For example, the stress distribution of each part of the arch dam under earthquake conditions is deduced through theoretical calculation, or simple comparative analysis is carried out based on the data collected by sensors arranged at a few key positions. Although these methods can reflect the state of the arch dam to a certain extent, they have obvious limitations.

[0004] The most prominent drawback is that the existing analysis means do not fully utilize the big data model of neural networks. Traditional methods are difficult to process massive and complex data and cannot mine the deep - level features and laws hidden in the data. The dynamic response of the arch dam structure under earthquake influence involves numerous variables and complex interrelationships. Analyzing only with limited data and conventional models is difficult to comprehensively and accurately grasp the actual situation, often resulting in large deviations in the analysis results, which in turn affects the subsequent judgment of the arch dam's safety and the scientific nature of maintenance decisions, and is not conducive to the long - term safe and reliable operation of the arch dam.

[0005] To solve the above problems, a method for analyzing dynamic response indexes of concrete arch dam structures affected by earthquakes is proposed in this application. Summary of the Invention

[0006] In order to overcome the shortcomings and deficiencies of the existing technology, the present invention provides a method for analyzing dynamic response indexes of concrete arch dam structures affected by earthquakes.

[0007] An embodiment of the present invention provides a method for analyzing dynamic response indexes of concrete arch dam structures affected by earthquakes, which includes:

[0008] An engineer's data centralized control center sends a signal for analyzing dynamic response indexes to a multi - modal data monitoring and acquisition platform for concrete arch dams affected by earthquakes;

[0009] After the multi-modal data monitoring and acquisition platform for the concrete arch dam affected by earthquake receives the structural dynamic response index analysis signal, a variety of data acquisition sensors collect a variety of displacement response and stress response indexes of the concrete arch dam per unit time, and damage indexes of the working state of the concrete arch dam per unit time, and store and send the collected data to the engineer data centralized control center;

[0010] Receiving data including displacement response indexes, stress response indexes and damage index data from the multi-modal data centralized control server, normalizing the data, and mapping data with different physical dimensions to the same numerical range;

[0011] According to the structural characteristics of the concrete arch dam, the arch dam is divided into different nodes, and a node feature matrix is constructed, where the feature vector of each node contains the displacement, stress and damage index information corresponding to the node. At the same time, an adjacency matrix is constructed according to the geometric structure and physical connection relationship of the arch dam to represent the connection relationship between nodes;

[0012] The engineer data centralized control center judges whether the various displacement response and stress response indexes and damage indexes are within the preset safety limit boundary conditions; if the various displacement response and stress response indexes and damage indexes are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server.

[0013] Furthermore, the various displacement response and stress response indexes include: horizontal displacement, vertical displacement, surface deformation of the dam body, and principal stress, shear stress, and stress concentration area.

[0014] Furthermore, the damage indexes include: the crack development situation of the concrete arch dam and the degradation situation of material properties.

[0015] Furthermore, it also includes: pre-setting a structural safety early warning model analysis library in the engineer data centralized control center, and storing the change intervals of the various displacement response and stress response indexes and damage indexes and the information of the structural safety early warning types in the structural safety early warning model analysis library.

[0016] Furthermore, if the various displacement response and stress response indexes and damage indexes are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the concrete arch dam structural safety analysis model interface, including:

[0017] The engineer data centralized control center evaluates the various displacement response and stress response indexes and damage indexes received with the structural safety early warning types in the structural safety early warning model analysis library;

[0018] According to the evaluation results, the engineer data centralized control center sends corresponding maintenance and repair instructions for the concrete arch dam to the multi-modal data centralized control server.

[0019] Furthermore, if the various displacement response and stress response indicators and damage indicators are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server. It also includes:

[0020] Index monitoring and judgment: Sensors installed at key parts of the concrete arch dam are used to collect displacement response data, stress response data in real time, and damage index data obtained through regular inspections or non-destructive testing techniques. Preset safety limit boundary conditions are set in the data acquisition system, which are determined based on the arch dam design specifications, past experience, and numerical simulation analysis results; when the collected data indicates that the displacement response index, stress response index, and damage index exceed the corresponding safety limit boundary conditions, the mechanism for generating maintenance and repair instructions is triggered.

[0021] Generation and transmission of maintenance and repair instructions: The signal processing unit in the monitoring system generates a maintenance and repair instruction for the concrete arch dam according to the index overrun situation. The signal contains key information such as the type, location, and degree of overrun of the overrun index, and the maintenance and repair instruction is transmitted to the multi-modal data centralized control server through network communication.

[0022] Processing and feedback of the multi-modal data centralized control server: After receiving the prompt signal, the multi-modal data centralized control server analyzes and organizes the signal, extracts relevant detailed data information, and packs and transmits the overrun information and related data to the concrete arch dam structural safety analysis model interface according to the preset communication protocol and interface.

[0023] Presentation of the structural safety analysis model interface and generation of steps: After receiving the data from the multi-modal data centralized control server, the concrete arch dam structural safety analysis model interface intuitively displays on the interface the detailed information of specific index overruns and the specific parts of the arch dam where the overruns occur, presented in the form of charts and text warnings.

[0024] Furthermore, the feedback to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server includes: The multi-modal data centralized control server feeds back the maintenance and repair instruction for the concrete arch dam to the concrete arch dam structural safety analysis model interface in the form of tags.

[0025] An embodiment of the present invention further provides a system for analyzing dynamic response indexes of a concrete arch dam structure affected by an earthquake, including a control server for the concrete arch dam, multiple safety monitoring points for the concrete arch dam structure, a multi-modal data centralized control server, and a safety analysis model interface for the concrete arch dam structure. An engineer data centralized control center is set on the control server for the concrete arch dam, and a multi-modal data monitoring and acquisition platform for the concrete arch dam affected by an earthquake is set on each of the multiple safety monitoring points for the concrete arch dam structure;

[0026] The engineer data centralized control center is used to send a signal for analyzing dynamic response indexes to the multi-modal data monitoring and acquisition platform for the concrete arch dam affected by an earthquake;

[0027] After receiving the signal for analyzing dynamic response indexes, the multi-modal data monitoring and acquisition platform for the concrete arch dam affected by an earthquake is used to collect various displacement response and stress response indexes of the concrete arch dam per unit time, and damage indexes of the working state of the concrete arch dam per unit time by multiple data acquisition sensors, and store and send the collected data to the engineer data centralized control center;

[0028] The engineer data centralized control center is further used to judge whether the various displacement response and stress response indexes and damage indexes are within the preset safety limit boundary conditions; if the various displacement response and stress response indexes and damage indexes are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the safety analysis model interface for the concrete arch dam structure through the multi-modal data centralized control server.

[0029] Further, the multi-modal data centralized control server is used to feed back the maintenance and repair instruction for the concrete arch dam to the safety analysis model interface for the concrete arch dam structure in the form of a label.

[0030] Further, the engineer data centralized control center is used to evaluate the various displacement response and stress response indexes and damage indexes received with the safety warning types in the safety warning model analysis library for the structure; and according to the evaluation results, send corresponding maintenance and repair instructions for the concrete arch dam to the multi-modal data centralized control server.

[0031] An analysis method for dynamic response indexes of a concrete arch dam structure affected by earthquakes is provided in an embodiment of the present invention. Through the powerful data processing ability of a neural network, this method can integrate a large amount of data on the concrete arch dam under earthquake influence from different sensors, at different times, and covering various types (such as displacement, stress, damage, etc.), fully excavate the complex relationships and characteristics hidden therein, and avoid the problem that the traditional analysis method fails to comprehensively reflect the actual situation due to limited data volume. Secondly, the big data model can adaptively learn the laws in the data. Through learning and training on a large amount of historical data and real-time monitoring data, it can accurately capture the internal logic of the dynamic response indexes of the arch dam structure changing with factors such as earthquake intensity and frequency, and then more accurately predict the change trends of each index under different earthquake conditions. Moreover, the non-linear mapping ability of the neural network enables it to well handle complex non-linear systems such as the arch dam structure. Whether it is analyzing the correlations between different positions in the displacement response, the complex stress changes in the stress concentration area, or the complex situations such as crack development in the damage index, it can give accurate results that conform to the actual situation, thus providing a reliable basis for engineers to accurately judge the safety of the arch dam structure and scientifically formulate maintenance and reinforcement strategies, and effectively ensuring the long-term stable operation of the concrete arch dam under earthquake threats. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description 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.

[0033] Figure 1 It is a first process schematic diagram of an analysis method for dynamic response indexes of a concrete arch dam structure affected by earthquakes provided in an embodiment of the present invention;

[0034] Figure 2 It is a second process schematic diagram of an analysis method for dynamic response indexes of a concrete arch dam structure affected by earthquakes provided in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be further described in detail below with reference to the drawings and specific embodiments.

[0036] Please refer to Figure 1 The process schematic diagram of an analysis method for dynamic response indexes of a concrete arch dam structure affected by earthquakes provided in an embodiment of the present invention. The method includes:

[0037] Step S100: The engineer data centralized control center sends a structural dynamic response index analysis signal to the multi-modal data monitoring and acquisition platform for a concrete arch dam affected by an earthquake;

[0038] Step S200: After the multi-modal data monitoring and acquisition platform for the concrete arch dam affected by the earthquake receives the structural dynamic response index analysis signal, multiple data acquisition sensors collect various displacement response and stress response indexes of the concrete arch dam per unit time, and damage indexes of the working state of the concrete arch dam per unit time, and store and send the collected data to the engineer data centralized control center;

[0039] Step S300: Receive data including displacement response indexes, stress response indexes, and damage index data from the multi-modal data centralized control server, perform normalization processing on the data, and map data with different physical dimensions to the same numerical range;

[0040] Step S400: According to the structural characteristics of the concrete arch dam, divide the arch dam into different nodes, construct a node feature matrix, where the feature vector of each node contains the displacement, stress, and damage index information corresponding to that node. At the same time, construct an adjacency matrix according to the geometric structure and physical connection relationship of the arch dam to represent the connection relationship between nodes;

[0041] Step S500: The engineer data centralized control center determines whether the various displacement response and stress response indexes and damage indexes are within the preset safety limit boundary conditions; if the various displacement response and stress response indexes and damage indexes are not within the preset safety limit boundary conditions, generate a maintenance and repair instruction for the concrete arch dam, and feedback it to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server.

[0042] In the embodiment of the present invention, the engineer data set control center can send a structural dynamic response index analysis signal to the multimodal data monitoring and acquisition platform of the concrete arch dam affected by the earthquake. The multimodal data monitoring and acquisition platform of the concrete arch dam affected by the earthquake can control the acquisition of multiple displacement responses and stress response indicators and damage indicators according to the structural dynamic response index analysis signal and feedback them to the engineer data set control center. In this way, the engineer data set control center can determine whether the multiple displacement responses and stress response indicators and damage indicators are within the safety limit boundary conditions. If not, it automatically generates a maintenance and repair instruction for the concrete arch dam, and feeds it back to the concrete arch dam structural safety analysis model interface through the multimodal data set control server. The management personnel can timely understand the structural safety warning information of the concrete arch dam per unit time, and timely process the structural safety warning to prevent the concrete arch dam from being damaged per unit time. The method provided in the embodiment of the present invention can automatically perform inspections, and can timely issue maintenance and repair instructions for the concrete arch dam, thereby improving analysis efficiency and reducing costs. In addition, the structural dynamic response index analysis method of the concrete arch dam affected by the earthquake provided in the embodiment of the present invention is mainly executed in the engineer data set control center and the multimodal data monitoring and acquisition platform of the concrete arch dam affected by the earthquake, and the response speed is fast.

[0043] Specifically, in step S100, the engineer data set control center can send the structural dynamic response index analysis signal to the multimodal data monitoring and acquisition platform of concrete arch dam affected by earthquake in different ways, for example, sending the structural dynamic response index analysis signal in a timed manner, that is, sending the structural dynamic response index analysis signal every same period of time, and the duration can be the default duration of the device or a custom duration.

[0044] In addition, the structural dynamic response index analysis signal can also be sent in an irregular manner, that is, the structural dynamic response index analysis signal is sent every different period of time. In this way, it can be manually started by the management personnel, that is, the management personnel can evaluate whether it is necessary to send the structural dynamic response index analysis signal based on their own experience or actual working status. It is also possible to divide each cycle into several different time periods in advance, and set a time interval for different time periods, so that within a time period, the structural dynamic response index analysis signal is regularly sent according to the corresponding time interval. This method is actually also a scheduled inspection, but the time interval is different in different time periods. The advantage of setting different time periods is that the detection frequency can be set in a targeted manner.

[0045] In step S200, the multiple data acquisition sensors are started, and according to the type of each sensor in the sensor group, multiple displacement response and stress response indicators of the concrete arch dam per unit time and damage indicators of the working state of the concrete arch dam per unit time are collected.

[0046] Among them, the multiple displacement response and stress response indicators include: horizontal displacement, vertical displacement, surface deformation of the dam body, and principal stress, shear stress, and stress concentration area. The damage indicators include: the development of cracks in the concrete arch dam and the degradation of material properties.

[0047] The above data can be collected by corresponding sensors. The combination of each sensor can be collectively referred to as a sensor group. A sensor group can be set on the concrete arch dam every unit time, so as to collect multiple displacement response and stress response indicators of the concrete arch dam every unit time, and damage indicators of the working state of the concrete arch dam every unit time, so as to realize the remote warning function of the concrete arch dam every unit time.

[0048] The functions of the above multiple displacement response and stress response indicators and damage indicators are different. For example, for the multiple displacement response and stress response indicators, the current state of the concrete arch dam per unit time can be directly reflected, and it can be determined whether a structural safety warning occurs for the concrete arch dam per unit time. For the damage indicators of the working state of the concrete arch dam per unit time, the current working state of the concrete arch dam per unit time can be directly reflected, such as whether there are significant changes in the working state of the concrete arch dam per unit time, or whether there are phenomena such as deterioration of the working state. In this way, it can be predicted whether the concrete arch dam will have a structural safety warning in this unit time, so as to make timely treatment.

[0049] The multi-modal data monitoring and acquisition platform for the concrete arch dam affected by earthquakes can store the data collected by the sensor group and finally send it to the engineer data centralized control center.

[0050] In step S500, after receiving the multiple displacement response and stress response indicators and damage indicators, the engineer data centralized control center can judge whether the multiple displacement response and stress response indicators and damage indicators are within the preset safety limit boundary conditions.

[0051] The multiple displacement response and stress response indicators and damage indicators are not within the preset safety limit boundary conditions. That is to say, the multiple displacement response and stress response indicators are not within the preset safety limit boundary conditions, and the damage indicators are not within the preset safety limit boundary conditions. Then, it is necessary to generate a maintenance and repair instruction for the concrete arch dam and feedback it to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server.

[0052] The interface of the concrete arch dam structure safety analysis model can be the interface of the concrete arch dam structure safety analysis model for maintenance personnel, so that the maintenance personnel can timely process the structural safety warnings that are occurring or about to occur in the concrete arch dam per unit time. The interface of the concrete arch dam structure safety analysis model can also be the interface of the concrete arch dam structure safety analysis model for management personnel, so that the management personnel can arrange personnel for processing according to the area where the concrete arch dam is located per unit time.

[0053] The concrete arch dam structure safety analysis model analyzes the information fed back by the multi-modal data centralized control server by combining the graph neural network algorithm, including:

[0054] Adopt the graph convolutional neural network (GCN) as the basic model structure. The calculation formula of the graph convolutional neural network layer is as follows:

[0055]

[0056] Among them, A is the adjacency matrix, I is the identity matrix, is the degree matrix of, H (l) is the node feature matrix of the l-th layer, W (l) is the trainable weight matrix of the l-th layer, and σ is the activation function;

[0057] Construct a multi-layer GCN network architecture, for example, set 3 - 5 GCN layers to extract high-order feature information in the concrete arch dam structure data, and learn the complex relationships and overall structural characteristics between different nodes.

[0058] In the last layer of the model, connect a fully connected layer for classification tasks. For example, if it is necessary to judge the safety status (safe, warning, dangerous, etc.) of the arch dam structure, the number of output nodes of the fully connected layer is determined according to the number of safety status categories, and the softmax activation function is used to convert the output into the probability distribution of each category.

[0059] Define the loss function, such as the cross-entropy loss function (where N is the number of samples, C is the number of categories, y ic is the true category label of the i-th sample, and p ic is the probability that the model predicts that the i-th sample belongs to the c-th category).

[0060] The constructed graph neural network model is trained using a large amount of labeled concrete arch dam structure data (including normal operation data and data under different degrees of damage or dangerous states). The weight parameters of the model are adjusted through the backpropagation algorithm to minimize the loss function, enabling the model to accurately judge the safety state of the arch dam based on the input structural response indicators.

[0061] The real-time collected and preprocessed concrete arch dam structure data is input into the trained graph neural network model.

[0062] The model outputs the safety state probability distribution of each node and the comprehensive safety state evaluation result of the entire arch dam structure. For example, if the probability of a certain area corresponding to a node being judged as a dangerous state is relatively high, then focus on the structural conditions of that area; if the probability of the dangerous state of the overall arch dam structure exceeds the preset threshold, then trigger a comprehensive safety warning and corresponding countermeasures.

[0063] According to the model output results, the safety state distribution is visually displayed on the interface of the concrete arch dam structure safety analysis algorithm. For example, different safety state node areas are marked with different colors, and at the same time, a detailed numerical report is provided, including the probability values of each category of each node, the overall safety state evaluation indicators, etc., so that engineers can intuitively understand the safety status of the arch dam structure and make decisions.

[0064] In practical applications, it is also necessary to continuously optimize and update the graph neural network model according to new monitoring data and actual engineering situations to improve its accuracy and adaptability.

[0065] To better analyze the structural safety warning of the concrete arch dam per unit time, the embodiment of the present invention preferably simultaneously collects various displacement response and stress response indicators of the concrete arch dam per unit time and the damage indicators of the working state of the concrete arch dam per unit time, and analyzes the structural safety warning based on these two types of information. When the various displacement response and stress response indicators and damage indicators are all within the preset safety limit boundary conditions, no maintenance and repair instructions for the concrete arch dam are generated. When any one of the various displacement response and stress response indicators and damage indicators is not within the preset safety limit boundary conditions, maintenance and repair instructions for the concrete arch dam are generated. This can ensure the timely discovery of structural safety warnings and the handling of structural safety warnings.

[0066] In one embodiment, the method for analyzing the dynamic response indicators of the concrete arch dam structure affected by an earthquake further includes:

[0067] A structural safety warning model analysis library is pre-set in the engineer data centralized control center, and the change ranges of the various displacement response and stress response indicators and damage indicators, and the information of the structural safety warning types are stored in the structural safety warning model number

[0068] In this embodiment, the change ranges of multiple displacement response and stress response indicators and damage indicators can be stored in the structural safety early warning model analysis library in advance. In this way, when the engineer data centralized control center conducts structural safety early warning analysis, the corresponding change ranges can be retrieved at any time for evaluation. At the same time, the information of the structural safety early warning type can also be stored in the structural safety early warning model analysis library, so that the type of structural safety early warning can be determined, which is convenient for maintenance personnel to perform structural safety early warning processing.

[0069] As Figure 2 shown, in one embodiment, when the multiple displacement response and stress response indicators and damage indicators are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server. It also includes:

[0070] Step A100, Index Monitoring and Judgment: Use sensors installed at key parts of the concrete arch dam to collect displacement response data, stress response data in real time, and obtain damage indicator data through regular inspections or non-destructive testing techniques. Set preset safety limit boundary conditions in the data acquisition system, and these conditions are determined based on the arch dam design specifications, past experience, and numerical simulation analysis results; when the collected data indicates that the displacement response index, stress response index, and damage index exceed the corresponding safety limit boundary conditions, trigger the mechanism for generating maintenance and repair instructions.

[0071] Step A200, Generation and Transmission of Maintenance and Repair Instructions: The signal processing unit in the monitoring system generates a maintenance and repair instruction for the concrete arch dam according to the index overrun situation. The signal contains key information such as the type, location, and degree of overrun of the overrun index, and transmits the maintenance and repair instruction to the multi-modal data centralized control server through network communication.

[0072] Step A300, Processing and Feedback of the Multi-modal Data Centralized Control Server: After receiving the prompt signal, the multi-modal data centralized control server analyzes and organizes the signal, extracts relevant detailed data information, and packs and transmits the overrun information and related data to the concrete arch dam structural safety analysis model interface according to the preset communication protocol and interface.

[0073] Step A400, Presentation of the Structural Safety Analysis Model Interface and Generation of Steps: After receiving the data from the multi-modal data centralized control server, the concrete arch dam structural safety analysis model interface visually displays on the interface the detailed information of specific index overruns and the specific parts of the arch dam where the overruns occur, presented in the form of charts and text warnings.

[0074] The engineer data centralized control center evaluates various displacement response and stress response indicators, damage indicators received and the structural safety warning types in the structural safety warning model analysis library;

[0075] Based on the evaluation results, the engineer data centralized control center sends corresponding maintenance and repair instructions for the concrete arch dam to the multi-modal data centralized control server.

[0076] After determining that various displacement response and stress response indicators, damage indicators are not within the preset change range, various displacement response and stress response indicators, damage indicators can be evaluated with the structural safety warning types in the structural safety warning model analysis library. Then, the maintenance and repair instructions for the concrete arch dam are sent to the multi-modal data centralized control server, and are fed back to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server. In this way, not only can the information that the concrete arch dam has had or will have a structural safety warning per unit time be obtained, but also the information about what structural safety warning the concrete arch dam has had per unit time can be obtained, thus facilitating targeted processing.

[0077] In one embodiment, the feedback to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server includes:

[0078] The multi-modal data centralized control server feeds back the maintenance and repair instructions for the concrete arch dam to the concrete arch dam structural safety analysis model interface in the form of tags;

[0079] In step S100: This step is the starting trigger point of the entire analysis process. The engineer data centralized control center, as the control core of the entire system, actively initiates an analysis instruction for the structural dynamic response indicators of the concrete arch dam. By sending a specific structural dynamic response indicator analysis signal to the multi-modal data monitoring and acquisition platform of the earthquake-affected concrete arch dam, it notifies the platform to start data acquisition work to obtain various data required for subsequent analysis. This signal is similar to a start command to ensure that all links of the entire monitoring and analysis system work in a coordinated and orderly manner.

[0080] In step S200: After receiving the instruction, the multi-modal data monitoring and acquisition platform activates various data acquisition sensors deployed at key parts of the concrete arch dam. These sensors are specially designed to monitor the physical state changes of the arch dam under working conditions such as earthquakes.

[0081] The acquisition of displacement response indicators is achieved through, for example, high-precision displacement sensors, which can accurately measure the horizontal displacement, vertical displacement, and surface deformation of different positions of the dam body at each unit time. The horizontal displacement reflects the movement amplitude of the dam body in the horizontal direction due to the action of seismic forces, the vertical displacement reflects the settlement or uplift changes of the dam body in the vertical direction, and the surface deformation of the dam body helps to understand the overall morphological changes of the dam body.

[0082] The acquisition of stress response indicators relies on stress sensors, which can measure the principal stress, shear stress distribution, and stress concentration areas inside the dam body. The principal stress is crucial for judging the main tensile or compressive load conditions borne by the dam body material, the shear stress reflects the shear action borne by different parts of the dam body, and the stress concentration areas require particular attention because these areas are more likely to be damaged during an earthquake.

[0083] The acquisition methods of damage indicators are relatively diverse. For the crack development of concrete arch dams, crack monitors or regular manual inspections combined with image analysis techniques may be used to determine information such as the width, length, depth, and development trend of cracks. The degradation of material properties can be indirectly evaluated by regularly collecting concrete samples for material test analysis or by using non-destructive testing techniques such as ultrasonic testing to assess the changes in key performance indicators such as the strength and elastic modulus of concrete over time and under seismic action.

[0084] The collected data will first be stored in the local cache or a dedicated data storage device to prevent data loss. At the same time, the data will be sent to the engineer's data centralized control center in real time for subsequent centralized processing and analysis to ensure the timeliness and integrity of the data, enabling engineers to promptly grasp the real-time status information of the arch dam.

[0085] In step S300: Receive data containing displacement response indicators, stress response indicators, and damage indicator data from the multi-modal data centralized control server, perform normalization processing on the data to map data with different physical dimensions to the same numerical range; according to the structural characteristics of the concrete arch dam, divide the arch dam into different nodes, construct a node feature matrix, where the feature vector of each node contains the displacement, stress, and damage indicator information corresponding to that node, and at the same time, construct an adjacency matrix according to the geometric structure and physical connection relationship of the arch dam to represent the connection relationship between nodes

[0086] Data normalization is an important part of data preprocessing. Since the collected data of indicators such as displacement, stress, and damage have different physical dimensions and numerical ranges, for example, displacement may be in millimeters and stress in megapascals, direct analysis may lead to some data features being overemphasized or underemphasized during model training or calculation. Through normalization, such as mapping all data into the interval from 0 to 1 or from -1 to 1, different types of data can have equal weights and comparability in subsequent analysis algorithms, improving the accuracy and reliability of the analysis results.

[0087] Node division according to the unique structural characteristics of a concrete arch dam is a key step in constructing an analysis model based on a graph neural network. The arch dam can be divided into different nodes according to its geometric partitions of the structure (such as different dam sections, different elevation areas, etc.) or according to the layout positions of sensors. Each node represents a local area of the arch dam or a monitoring point and its surrounding area. The purpose of doing this is to discretize the complex overall structure of the arch dam, facilitating the use of the concepts of nodes and edges in the graph neural network to describe its structural relationships and data feature propagation.

[0088] When constructing the node feature matrix, for each divided node, the corresponding displacement response index, stress response index, and damage index information are integrated into a feature vector. For example, the feature vector of a certain node may contain data such as the horizontal displacement value, vertical displacement value, principal stress magnitude, shear stress magnitude, and crack width at that node, and these data comprehensively describe the structural state of the node area.

[0089] Constructing the adjacency matrix is based on the geometric structure and physical connection relationships of the arch dam. Geometrically, there are physical connections and interactions between adjacent dam sections and between upper and lower layers, and this connection relationship is represented by the elements in the adjacency matrix. If two nodes are adjacent or have a direct physical association in the actual arch dam structure, then a non-zero value (such as 1) is set at the corresponding position in the adjacency matrix, otherwise it is 0. The adjacency matrix constructed in this way accurately reflects the paths of information transmission and mutual influence in the arch dam structure, providing a basic framework for the graph neural network to simulate the mechanical transmission and state changes inside the structure during the analysis process.

[0090] In step S400: Considering that a concrete arch dam is a complex large-scale structure, in order to better utilize graph neural networks for structural safety analysis, it is necessary to reasonably divide the arch dam into nodes. According to the structural characteristics of the arch dam, such as the division of dam sections, the differences in different elevation areas, and the distribution of key stress-bearing parts, etc., the arch dam is divided into multiple different nodes. Each node represents a local area of the arch dam or a representative monitoring point and its surrounding area. When constructing the node feature matrix, for each node, the corresponding displacement response index, stress response index, and damage index information are integrated into a feature vector. For example, the feature vector of a certain node may include data such as the horizontal displacement value, vertical displacement value, principal stress magnitude, shear stress magnitude, crack width, and material strength change rate at this node. These data comprehensively and accurately describe the structural state characteristics of this node area. At the same time, an adjacency matrix is constructed according to the geometric structure of the arch dam (such as the connection relationship between adjacent dam sections and the association between different elevation areas) and the physical connection relationship (such as the continuity of concrete pouring and the connection of steel bars, etc.). In the adjacency matrix, if there is a direct physical connection or mutual influence relationship between two nodes in the actual arch dam structure, the element at the corresponding position is set to a non-zero value (usually 1), otherwise it is 0. The adjacency matrix constructed in this way can clearly reflect the path of information transmission and interaction within the arch dam structure, providing an important structural basis for the graph neural network to simulate the mechanical behavior and state changes of the structure during the analysis process.

[0091] In step S500: The engineer data centralized control center has preset a series of safety limit boundary conditions based on engineering experience, design specifications, and a large number of experiments and simulation analyses. These conditions are respectively specified for displacement response indicators (such as the maximum allowable displacement at the dam crest, deformation limits at specific parts of the dam body, etc.), stress response indicators (the allowable stress range of concrete materials, the stress upper limit in stress concentration areas, etc.), and damage indicators (the critical values of crack width and length, to what extent the material performance degradation is considered dangerous, etc.).

[0092] After receiving various index data from the multi-modal data monitoring and acquisition platform, the engineer data centralized control center compares these data with the corresponding safety limit boundary conditions one by one. If all indicators are within the safety boundaries, it indicates that the arch dam is in a safe state under the current earthquake impact and can continue to operate normally and be continuously monitored. However, if any one or more of the displacement response and stress response indicators and damage indicators exceed the preset safety limit boundary conditions, this means that the arch dam structure may have suffered a certain degree of damage or is in a dangerous state and needs maintenance and repair.

[0093] At this time, the engineer data centralized control center will automatically generate a maintenance and repair instruction for the concrete arch dam. This instruction contains detailed information on the indicators that exceed the safety boundary, such as which specific indicators are over the limit, the magnitude of the over-limit values, and the corresponding positions of the arch dam. Then, through the multi-modal data centralized control server, this instruction is forwarded to the interface of the concrete arch dam structural safety analysis model. This interface is usually an operation platform for engineers and relevant technical personnel to conduct in-depth analysis and formulate specific maintenance and repair plans. They can, based on the received instruction information, combined with more detailed structural analysis models and data visualization tools, further study the problems of the arch dam and formulate a scientific and reasonable maintenance and repair plan to ensure the subsequent safe operation of the arch dam.

[0094] The embodiment of the present invention also provides a system for analyzing the dynamic response indicators of a concrete arch dam under earthquake influence, which includes a control server for the concrete arch dam, multiple structural safety monitoring points of the concrete arch dam, a multi-modal data centralized control server, and an interface of the concrete arch dam structural safety analysis model. An engineer data centralized control center is set on the control server for the concrete arch dam, and a multi-modal data monitoring and acquisition platform for the concrete arch dam under earthquake influence is set on each of the multiple structural safety monitoring points of the concrete arch dam;

[0095] The engineer data centralized control center is used to send a signal for analyzing the dynamic response indicators to the multi-modal data monitoring and acquisition platform for the concrete arch dam under earthquake influence;

[0096] After receiving the signal for analyzing the dynamic response indicators, the multi-modal data monitoring and acquisition platform for the concrete arch dam under earthquake influence uses a variety of data acquisition sensors to collect various displacement response and stress response indicators of the concrete arch dam per unit time, and damage indicators of the working state of the concrete arch dam per unit time, and stores and sends the collected data to the engineer data centralized control center;

[0097] The engineer data centralized control center is also used to determine whether the various displacement response and stress response indicators and damage indicators are within the preset safety limit boundary conditions; if the various displacement response and stress response indicators and damage indicators are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the interface of the concrete arch dam structural safety analysis model through the multi-modal data centralized control server.

[0098] In one embodiment, the multi-modal data centralized control server is used to feed back the maintenance and repair instruction for the concrete arch dam to the interface of the concrete arch dam structural safety analysis model in the form of tags.

[0099] In one embodiment, the engineer data set control center is used to evaluate various displacement response and stress response indexes and damage indexes received and the structural safety warning types in the structural safety warning model analysis library; and send corresponding maintenance and repair instructions for the concrete arch dam to the multi-modal data set control server according to the evaluation results.

[0100] The various embodiments in the specification are described in a progressive manner. The key point of each embodiment is the difference from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and reference can be made to the description in the method part for related parts. It should be noted that for those of ordinary skill in the art in the technical field of the present invention, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection boundary conditions of the claims of the present invention.

Claims

1. A method for analyzing dynamic response indexes of a concrete arch dam structure affected by an earthquake, characterized in that The method includes: Step S100: The engineer data centralized control center sends a structural dynamic response index analysis signal to the multi-modal data monitoring and acquisition platform for a concrete arch dam affected by an earthquake; Step S200: After receiving the structural dynamic response index analysis signal, the multi-modal data monitoring and acquisition platform for the concrete arch dam affected by an earthquake uses multiple data acquisition sensors to collect various displacement response and stress response indexes of the concrete arch dam per unit time, and damage indexes of the working state of the concrete arch dam per unit time, and stores and sends the collected data to the engineer data centralized control center; Step S300: Receive data including displacement response indexes, stress response indexes, and damage index data from the multi-modal data centralized control server, perform normalization processing on the data, and map data with different physical dimensions to the same numerical range; Step S400: According to the structural characteristics of the concrete arch dam, divide the arch dam into different nodes, construct a node feature matrix, where the feature vector of each node contains the displacement, stress, and damage index information corresponding to that node. At the same time, construct an adjacency matrix according to the geometric structure and physical connection relationship of the arch dam to represent the connection relationship between nodes; Step S500: The engineer data centralized control center determines whether the various displacement response and stress response indexes and damage indexes are within the preset safety limit boundary conditions; if the various displacement response and stress response indexes and damage indexes are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam is generated and fed back to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server; The concrete arch dam structural safety analysis model analyzes the information fed back by the multi-modal data centralized control server by combining the graph neural network algorithm, including: Using the graph convolutional neural network (GCN) as the basic model structure, and the calculation formula of the graph convolutional neural network layer is as follows: Among them, A is the adjacency matrix, I is the identity matrix, is the degree matrix of, H (l) is the node feature matrix of the l-th layer, W (l) is the trainable weight matrix of the l-th layer, and σ is the activation function; Construct a multi-layer graph convolutional neural network architecture, set 3 to 5 graph convolutional neural network layers to extract high-order feature information in the concrete arch dam structural data, and learn the complex relationships and overall structural characteristics between different nodes; At the last layer of the model, connect a fully connected layer for classification tasks. If it is necessary to judge the safety state of the arch dam structure, the number of output nodes of the fully connected layer is determined according to the number of safety state categories, and the softmax activation function is used to convert the output into the probability distribution of each category; Define the loss function, the cross-entropy loss function where N is the number of samples, C is the number of classes, and y ic is the true class label of the i-th sample, and p ic is the probability that the model predicts the i-th sample belongs to the c-th class; Use the labeled concrete arch dam structural data, including normal operation data and data under different degrees of damage or dangerous states, to train the constructed graph neural network model, and adjust the weight parameters of the model through the backpropagation algorithm to minimize the loss function, so that the model can judge the safety state of the arch dam according to the input structural response indexes.

2. The method for analyzing the dynamic response index of a concrete arch dam structure affected by an earthquake according to claim 1, wherein The various displacement response and stress response indexes include: horizontal displacement, vertical displacement, surface deformation of the dam body, and principal stress, shear stress, and stress concentration area.

3. The dynamic response index analysis method of a concrete arch dam structure affected by earthquake according to claim 1, characterized in that, The damage indexes include: the crack development situation of the concrete arch dam and the degradation situation of material properties.

4. The dynamic response index analysis method for a concrete arch dam structure affected by an earthquake according to claim 1, characterized in that It also includes: Pre-set a structural safety warning model analysis library in the engineer's data centralized control center, and store the information of the various displacement response and stress response indicators, the change ranges of the damage indicators, and the structural safety warning types in the structural safety warning model analysis library.

5. The dynamic response index analysis method of a concrete arch dam structure affected by earthquake according to claim 4, characterized in that If the various displacement response and stress response indicators and the damage indicators are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam will be generated and fed back to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server, including: The engineer's data centralized control center evaluates the various displacement response and stress response indicators and the damage indicators received with the structural safety warning types in the structural safety warning model analysis library; The engineer's data centralized control center sends the corresponding maintenance and repair instruction for the concrete arch dam to the multi-modal data centralized control server according to the evaluation results.

6. The dynamic response index analysis method for a concrete arch dam structure affected by earthquakes according to claim 5, wherein If the various displacement response and stress response indicators and the damage indicators are not within the preset safety limit boundary conditions, a maintenance and repair instruction for the concrete arch dam will be generated and fed back to the concrete arch dam structural safety analysis model interface, and it also includes: Index monitoring and judgment: Use sensors installed at key parts of the concrete arch dam to collect displacement response data, stress response data in real time, and obtain damage indicator data through regular inspections or non-destructive testing techniques. Set the preset safety limit boundary conditions in the data acquisition system, which are determined based on the arch dam design specifications, past experience, and numerical simulation analysis results; when the collected data shows that the displacement response indicators, stress response indicators, and damage indicators exceed the corresponding safety limit boundary conditions, trigger the mechanism for generating the maintenance and repair instruction. Generation and transmission of the maintenance and repair instruction: The signal processing unit in the monitoring system generates a maintenance and repair instruction for the concrete arch dam according to the index overrun situation. The signal contains information such as the type, location, and overrun degree of the overrun index, and transmits the maintenance and repair instruction to the multi-modal data centralized control server through network communication. Processing and feedback of the multi-modal data centralized control server: After receiving the prompt signal, the multi-modal data centralized control server analyzes and collates the signal, extracts the relevant detailed data information, and packs and transmits the overrun information and related data to the concrete arch dam structural safety analysis model interface according to the preset communication protocol and interface; Presentation of the structural safety analysis model interface and generation of steps: After receiving the data from the multi-modal data centralized control server, the concrete arch dam structural safety analysis model interface visually displays on the interface the detailed information of specific index overruns and where in the specific parts of the arch dam the overruns occur, presented in the form of charts and text warnings.

7. The method for analyzing the dynamic response index of a concrete arch dam structure affected by an earthquake according to claim 1, characterized in that The feedback to the concrete arch dam structural safety analysis model interface through the multi-modal data centralized control server includes: The multi-modal data centralized control server feeds back the maintenance and repair instruction for the concrete arch dam to the concrete arch dam structural safety analysis model interface in the form of tags.

Images