Bridge shock insulation effect evaluation method and system for bridge engineering

Abstract

The invention is suitable for the field of bridge engineering, and provides a bridge shock insulation effect evaluation method and system for bridge engineering, and the system comprises a data integration and model construction module, a dynamic simulation recording module, an efficiency analysis module, and an economic evaluation module. By creating a three-dimensional bridge model that contains and does not contain seismic isolation means, the method allows for precise comparison of structural performance in both cases. The comparison provides direct quantitative evaluation for the performance of the seismic isolation device, and the utility of the seismic isolation technology in the aspect of reducing the seismic influence can be accurately judged. The method not only evaluates the influence of the seismic isolation device on instant seismic response, but also predicts the effectiveness of the seismic isolation device in the aspects of reducing long-term structural fatigue and delaying aging. The prediction of the long-term benefit is crucial for evaluating the real value of the seismic isolation device and deciding the application of the seismic isolation device in bridge design. And economic analysis of the seismic isolation technology can be provided for decision makers.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering, and in particular relates to a method and system for evaluating the seismic isolation effect of bridges for bridge engineering. Background Technology

[0002] Bridge engineering is a branch of engineering that focuses on the design, construction, and maintenance of bridges. Bridges are a key component of transportation networks, connecting different geographical areas and facilitating the movement of people and goods. Bridge engineering involves a variety of technical and design considerations, including material selection, structural design, construction methods, maintenance strategies, and environmental impact assessments.

[0003] Seismic isolation technology is an important field in bridge engineering, focusing on reducing the impact of earthquakes on bridge structures. It absorbs and disperses seismic energy by installing isolation devices (such as seismic bearings and dampers) between the bridge structure and its foundation, thereby reducing the damage caused by earthquake-induced vibrations. This technology can significantly improve the stability and safety of bridges during earthquakes, extend their service life, and reduce maintenance costs.

[0004] Many assessment methods may focus only on the role of seismic isolation devices in the immediate seismic response, i.e., how they reduce the instantaneous impact and vibration caused by an earthquake. However, seismic isolation devices also have a significant impact on the long-term performance of bridge structures, including reducing structural fatigue, delaying aging, and improving overall durability. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for evaluating the seismic isolation effect of bridges in bridge engineering, aiming to solve the technical problems existing in the prior art as identified in the background art.

[0006] This invention is implemented as follows: a method for evaluating the seismic isolation effect of bridges used in bridge engineering, the method comprising:

[0007] Establish a bridge analysis database, collect and store bridge structural data and material data, and obtain the design data of the seismic isolation device for the bridge. Based on all the data obtained above, establish a three-dimensional model of the bridge A that includes the seismic isolation device model and a three-dimensional model of the bridge B that does not include the seismic isolation device model.

[0008] Several sets of seismic wave data were set, and the same time history was set. The sets of seismic wave data were respectively substituted into bridge 3D model A and bridge 3D model B, and the dynamic behavior of the seismic isolation device under different seismic waves was recorded. At the same time, the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves were recorded in the same time history.

[0009] Analyze the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves to evaluate the effectiveness of the seismic isolation device in reducing structural response and extending structural service life.

[0010] Based on the analysis results, the impact of introducing seismic isolation devices on the overall cost of bridge engineering is assessed, and the cost difference between bridge engineering projects with and without seismic isolation devices is calculated.

[0011] As a further aspect of the present invention, the establishment of a three-dimensional bridge model A containing a seismic isolation device model and a three-dimensional bridge model B not containing a seismic isolation device model specifically includes:

[0012] Collect all data on the bridge and the seismic isolation devices. The bridge data includes basic parameters, structural dimensions and performance data. The seismic isolation device data includes type, size and quantity. Establish a bridge analysis database and store all collected data in the bridge analysis database.

[0013] Based on the content of the bridge analysis database, a three-dimensional model A and a three-dimensional model B of the bridge are established. The three-dimensional model A of the bridge includes a seismic isolation device model, while the three-dimensional model B of the bridge does not include a seismic isolation device model.

[0014] As a further aspect of the present invention, the recording of the dynamic behavior of the seismic isolation device under different seismic waves, and the recording of the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves over the same time period, specifically includes:

[0015] Based on historical earthquake data of the bridge location, several similar seismic wave data sets were set up, and each set of seismic wave data was respectively input into the bridge 3D model A and bridge 3D model B to simulate the dynamic response of the bridge under seismic action.

[0016] Data analysis group A and data analysis group B were established separately. After each set of seismic wave data was input into the three-dimensional model A of the bridge, the changes in the seismic isolation device data and the changes in the shape of the bridge were recorded in data analysis group A. After each set of seismic wave data was input into the three-dimensional model B of the bridge, the changes in the shape of the bridge were recorded in data analysis group B.

[0017] As a further aspect of the present invention, the analysis of the morphological change data of bridge 3D model A and bridge 3D model B under different seismic wave actions, and the evaluation of the effectiveness of the seismic isolation device in reducing structural response and extending structural service life, specifically includes:

[0018] By comparing the structural responses of bridge 3D model A and bridge 3D model B under the same seismic wave, the influence of the seismic isolation device on the response of various parts of the bridge is analyzed.

[0019] Based on the comparison results of structural responses, the effectiveness of seismic isolation devices in reducing the maximum structural response, reducing structural damage, and improving seismic performance is evaluated and quantified.

[0020] Based on the structural responses of bridge 3D model A and bridge 3D model B, structural aging predictions were performed on bridge 3D model A and bridge 3D model B respectively, and the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging was analyzed.

[0021] As a further aspect of the present invention, the assessment of the impact of introducing seismic isolation devices on the overall cost of bridge engineering, and the calculation of the cost difference between bridge engineering projects with and without seismic isolation devices, specifically includes:

[0022] Collect the bridge engineering cost A (including seismic isolation devices) and the bridge engineering cost B (without seismic isolation devices), and combine the results of the effectiveness analysis of seismic isolation devices in reducing structural fatigue damage and delaying structural aging to obtain the evaluation period for bridge engineering cost A and bridge engineering cost B respectively.

[0023] Calculate the engineering and maintenance costs of bridge engineering cost A and bridge engineering cost B respectively within the corresponding evaluation period, and evaluate the economic optimization of bridge engineering cost by introducing seismic isolation devices.

[0024] Another object of the present invention is to provide a bridge seismic isolation effect evaluation system for bridge engineering, the system comprising:

[0025] The data integration and model building module is used to establish a bridge analysis database, collect and store bridge structural data and material data, obtain the design data of the seismic isolation device of the bridge, and based on all the data obtained above, establish a three-dimensional bridge model A containing the seismic isolation device model and a three-dimensional bridge model B without the seismic isolation device model.

[0026] The dynamic simulation recording module is used to set several sets of seismic wave data and set the same time history. The several sets of seismic wave data are respectively substituted into the three-dimensional model A and the three-dimensional model B of the bridge, and the dynamic behavior of the seismic isolation device under the action of different seismic waves is recorded. At the same time, the morphological changes of the three-dimensional model A and the three-dimensional model B of the bridge under the action of different seismic waves are recorded in the same time history.

[0027] The performance analysis module is used to analyze the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves, and to evaluate the effectiveness of the seismic isolation device in reducing structural response and extending structural service life.

[0028] The economic evaluation module is used to assess the impact of introducing seismic isolation devices on the overall cost of bridge engineering based on the analysis results, and to calculate the cost difference between bridge engineering projects with and without seismic isolation devices.

[0029] As a further embodiment of the present invention, the data integration and model building module includes:

[0030] The bridge data integration unit is used to collect all data of the bridge and seismic isolation device data. The bridge data includes basic parameters, structural dimensions and performance data. The seismic isolation device data includes type, size and quantity. The unit also establishes a bridge analysis database and stores all collected data in the bridge analysis database.

[0031] The three-dimensional model building unit is used to create a three-dimensional bridge model A and a three-dimensional bridge model B based on the content of the bridge analysis database. The three-dimensional bridge model A includes a seismic isolation device model, while the three-dimensional bridge model B does not include a seismic isolation device model.

[0032] As a further embodiment of the present invention, the dynamic simulation recording module includes:

[0033] The seismic wave simulation unit is used to set up several similar seismic wave data groups based on the historical seismic data of the bridge location, and to input each group of seismic wave data into the bridge 3D model A and the bridge 3D model B respectively to simulate the dynamic response of the bridge under seismic action.

[0034] The dynamic response analysis unit is used to establish data analysis group A and data analysis group B respectively. After each set of seismic wave data is input into the three-dimensional model A of the bridge, the data changes of the seismic isolation device and the morphological changes of the bridge are recorded in data analysis group A. After each set of seismic wave data is input into the three-dimensional model B of the bridge, the morphological changes of the bridge are recorded in data analysis group B.

[0035] As a further embodiment of the present invention, the performance analysis module includes:

[0036] The structural response comparison unit is used to compare the structural responses of bridge 3D model A and bridge 3D model B under the same seismic wave action, and to analyze the impact of the seismic isolation device on the response of various parts of the bridge.

[0037] The seismic isolation performance evaluation unit is used to evaluate and quantify the effectiveness of seismic isolation devices in reducing the maximum structural response, reducing structural damage, and improving seismic performance based on the comparison results of structural responses.

[0038] The durability prediction unit is used to predict the structural aging of bridge 3D model A and bridge 3D model B based on their structural responses, and to analyze the effectiveness of the seismic isolation device in reducing structural fatigue damage and delaying structural aging.

[0039] As a further embodiment of the present invention, the economic evaluation module includes:

[0040] The cost analysis unit is used to collect the bridge engineering cost A (including seismic isolation devices) and the bridge engineering cost B (without seismic isolation devices), and, in conjunction with the effectiveness analysis results of seismic isolation devices in reducing structural fatigue damage and delaying structural aging, to obtain the evaluation period for bridge engineering cost A and bridge engineering cost B respectively.

[0041] The economic benefit assessment unit is used to calculate the engineering cost and maintenance cost of bridge engineering cost A and bridge engineering cost B respectively within the corresponding assessment period, and to assess the economic optimization of bridge engineering cost by introducing seismic isolation devices.

[0042] The beneficial effects of this invention are:

[0043] By creating 3D models of bridges with and without seismic isolation devices, this method allows for a precise comparison of structural performance in both scenarios. This comparison provides a direct, quantitative assessment of the performance of the isolation devices, accurately determining their effectiveness in reducing seismic impacts. The method not only evaluates the impact of isolation devices on immediate seismic response but also predicts their effectiveness in reducing long-term structural fatigue and delaying aging. This prediction of long-term benefits is crucial for assessing the true value of isolation devices and determining their application in bridge design. It also provides decision-makers with an economic analysis of seismic isolation technology. Attached Figure Description

[0044] Figure 1 A flowchart of a method for evaluating the seismic isolation effect of bridges for bridge engineering is provided in an embodiment of the present invention;

[0045] Figure 2 The flowcharts provided for embodiments of the present invention are for establishing a three-dimensional bridge model A that includes a seismic isolation device model and a three-dimensional bridge model B that does not include a seismic isolation device model.

[0046] Figure 3 This invention provides a flowchart for recording the dynamic behavior of a seismic isolation device under different seismic waves, and simultaneously recording the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves over the same time period.

[0047] Figure 4A flowchart for analyzing the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves, and evaluating the effectiveness of the seismic isolation device in reducing structural response and extending structural service life, provided in an embodiment of the present invention.

[0048] Figure 5 A flowchart for calculating the cost difference between bridge projects with and without seismic isolation devices, provided for embodiments of the present invention;

[0049] Figure 6 A structural block diagram of a bridge seismic isolation effect evaluation system for bridge engineering provided in an embodiment of the present invention;

[0050] Figure 7 This is a structural block diagram of the data integration and model building module provided in an embodiment of the present invention;

[0051] Figure 8 This is a structural block diagram of the dynamic simulation recording module provided in an embodiment of the present invention;

[0052] Figure 9 This is a structural block diagram of the performance analysis module provided in an embodiment of the present invention;

[0053] Figure 10 This is a structural block diagram of the economic evaluation module provided in an embodiment of the present invention. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0055] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first script may be referred to as a second script, and similarly, a second script may be referred to as a first script.

[0056] Figure 1 A flowchart of a bridge seismic isolation effect evaluation method for bridge engineering is provided as an embodiment of the present invention, as shown below. Figure 1 As shown, a method for evaluating the seismic isolation effect of bridges for bridge engineering is provided, wherein the method includes:

[0057] S100, establish a bridge analysis database, collect and store bridge structural data and material data, and obtain the design data of the seismic isolation device of the bridge. Based on all the data obtained above, establish a three-dimensional model of the bridge A that includes the seismic isolation device model and a three-dimensional model of the bridge B that does not include the seismic isolation device model.

[0058] This step begins with the comprehensive collection of detailed data on the bridge and its seismic isolation devices, including basic parameters, structural dimensions, performance data, and the type, size, and quantity of the seismic isolation devices. This data is integrated and stored in a specially designed bridge analysis database, ensuring data integrity and ease of retrieval. Subsequently, using this data, a 3D model A of the bridge including the seismic isolation devices and a model B without them are constructed using specialized software, ensuring that the models accurately reflect the actual bridge structure and the configuration of the seismic isolation devices. The significant advantage of this step lies in its comprehensiveness and accuracy, providing a solid foundation for subsequent analysis.

[0059] Meanwhile, the design of this step takes into account future scalability and adaptability, enabling the method to adapt to ever-changing engineering needs and technological advancements. Furthermore, through precise modeling and data analysis, the economic benefits of seismic isolation devices can be more effectively evaluated, providing a scientific basis for investment decisions in bridge engineering.

[0060] S200: Set several sets of seismic wave data and set the same time history. Substitute the several sets of seismic wave data into bridge 3D model A and bridge 3D model B respectively, and record the dynamic behavior of the seismic isolation device under different seismic waves. At the same time, record the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves in the same time history.

[0061] This step involves the detailed setup and execution of seismic response simulations for two bridge 3D models (Bridge 3D Model A and Bridge 3D Model B) with different configurations. First, based on historical seismic data of the bridge's location, a series of seismic wave data sets were carefully selected and configured, ensuring that these data sets represent the seismic scenarios that the area might encounter. Subsequently, these seismic wave data sets were input into Bridge 3D Model A (containing seismic isolation devices) and Bridge 3D Model B (without seismic isolation devices), respectively, to simulate the bridge's dynamic response under seismic loading.

[0062] To systematically collect and analyze the results of earthquake simulations, this step also includes establishing two data analysis groups (Data Analysis Group A and Data Analysis Group B). Data Analysis Group A is responsible for collecting and analyzing the performance data of the seismic isolation devices and the morphological changes of the bridge's 3D model A under various seismic wave loads, while Data Analysis Group B records and analyzes the morphological changes of the bridge's 3D model B under the same seismic conditions. This grouping method not only helps to intuitively compare the effectiveness of the seismic isolation devices but also clearly demonstrates the specific impact of the seismic isolation devices on the dynamic behavior of the bridge.

[0063] This step, through precise simulation of different seismic scenarios, provides direct evidence of the actual effectiveness of seismic isolation devices, which is crucial for evaluating the practical value of seismic isolation technology. Secondly, the methodology and technical framework of this step allow for easy expansion or modification of the seismic wave dataset to accommodate new research needs or new seismic data, ensuring the modernity and adaptability of the method. Finally, through detailed data collection and analysis, not only is the predictive accuracy of the model enhanced, but also solid data support is provided for subsequent cost-benefit analysis and engineering decisions.

[0064] S300: Analyze the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves to evaluate the effectiveness of the seismic isolation device in reducing structural response and extending structural service life.

[0065] The effectiveness of seismic isolation devices is evaluated by comparing and analyzing the structural responses of bridge 3D model A (including seismic isolation devices) and bridge 3D model B (without seismic isolation devices) under the same seismic wave action. This step first compares the dynamic responses of the two models under seismic action, and then analyzes in detail the specific impact of the seismic isolation devices on the responses of various parts of the bridge. Through this comparison, the effectiveness of seismic isolation devices in reducing the maximum structural response, reducing structural damage, and improving seismic performance can be quantified.

[0066] Furthermore, this step includes predicting structural aging in both models and analyzing the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging. This analysis not only focuses on the immediate response during earthquakes but also considers structural durability and lifespan extension during long-term use, providing important reference for the long-term maintenance and use of bridges.

[0067] Through detailed comparative analysis and structural aging prediction, this step provides a comprehensive assessment of the effectiveness of seismic isolation devices, including not only immediate seismic response but also long-term structural health and life prediction. This comprehensive analytical approach helps engineering decision-makers more accurately understand the value of seismic isolation technology, thereby enabling them to make more scientific and economical decisions in bridge design and maintenance.

[0068] The scalability of this step is reflected in the flexibility and extensibility of its analytical framework. As technology advances and new data emerges, this step can easily integrate new analytical tools and methods, such as more advanced structural analysis software or new aging models, to improve the accuracy and depth of the analysis. This scalability ensures the continued relevance and effectiveness of the methodology, enabling it to adapt to evolving engineering needs and technological advancements.

[0069] S400, based on the analysis results, assesses the impact of introducing seismic isolation devices on the overall cost of bridge engineering, and calculates the cost difference between bridge engineering with and without seismic isolation devices.

[0070] This study assesses the economic impact of seismic isolation devices on bridge construction costs by analyzing and comparing the costs of bridge projects (A) with and without seismic isolation devices (B). This step first collects and analyzes the construction and maintenance costs of the two different configurations, including initial construction costs and long-term maintenance costs. By combining the results of the analysis on the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging, the total costs of the two types of bridges can be predicted more accurately over different evaluation periods.

[0071] The engineering and maintenance costs of bridge engineering costs A and B are calculated separately for their respective evaluation periods, including forecasts and considerations for future maintenance expenses. This detailed cost analysis allows for the assessment of the economic optimization effect of introducing seismic isolation devices on bridge engineering costs, i.e., whether it saves costs and improves return on investment in the long term.

[0072] By combining technical performance analysis with economic cost analysis, this step provides a comprehensive perspective for evaluating the economic value of seismic isolation devices. This integrated assessment not only helps engineering decision-makers understand the economic benefits of seismic isolation technology but also provides important decision support in project planning and budget allocation.

[0073] As market conditions change, such as fluctuations in material and labor costs, this step allows for easy adjustment of the cost calculation model to maintain the accuracy and relevance of the analysis. Simultaneously, with the development of new economic analysis tools and methods, these new tools can be integrated to improve the precision and depth of cost forecasting. This scalability ensures that the method can adapt to constantly changing engineering and economic environments, maintaining its effectiveness as a decision support tool.

[0074] Figure 2 The flowcharts provided for embodiments of the present invention illustrate the creation of a three-dimensional bridge model A containing a seismic isolation device model and a three-dimensional bridge model B not containing a seismic isolation device model. Figure 2As shown, the establishment of a three-dimensional bridge model A containing a seismic isolation device model and a three-dimensional bridge model B without a seismic isolation device model specifically includes:

[0075] S110, collect all data of the bridge and seismic isolation device data. The total data of the bridge includes basic parameters, structural dimensions and performance data. The seismic isolation device data includes type, size and quantity. Establish a bridge analysis database and store all collected data in the bridge analysis database.

[0076] S120. Based on the content of the bridge analysis database, establish a three-dimensional bridge model A and a three-dimensional bridge model B. The three-dimensional bridge model A includes a seismic isolation device model, while the three-dimensional bridge model B does not include a seismic isolation device model.

[0077] In step S120, the function expression of the three-dimensional bridge model A, which includes the seismic isolation device model, is:

[0078]

[0079] Where f(B, S, I) represents the function output of the three-dimensional bridge model A, which includes the seismic isolation device model; B represents the basic parameters of the bridge, S represents the structural dimensions of the bridge, and I represents the parameters of the seismic isolation device. s This indicates the static load-bearing capacity of a bridge, representing the maximum static load a bridge can withstand without structural failure; S e I represents the effective elastic modulus of a bridge structure. f I represents the efficiency factor of the seismic isolation device. n Indicates the number of seismic isolation devices, B m B represents the overall mass of the bridge structure. l B represents the total length of the bridge. w I represents the total width of the bridge. t Indicates the type coefficient of the seismic isolation device, I d This indicates the damping coefficient of the seismic isolation device.

[0080] As a supplementary note, regarding the efficiency factor I of the seismic isolation device... f This reflects the effectiveness of seismic isolation devices in reducing bridge vibration. For the type coefficient I of the seismic isolation device... t Different types of seismic isolation devices will have different effects, and this coefficient is used to quantify this difference. For the damping coefficient I of the seismic isolation device... d This indicates the ability of a seismic isolation device to absorb and dissipate vibration energy.

[0081] Furthermore, the functional expression for the three-dimensional bridge model B, which does not include the seismic isolation device model, is:

[0082]

[0083] Where g(B, S) represents the function output of the three-dimensional bridge model B without the seismic isolation device model; S h S represents the height of the bridge, used to indicate the distance from the bridge deck to the bottom of the piers. r B is the span ratio of a bridge, used to represent the proportion of lengths between the spans of a bridge. d S represents the design load of a bridge, indicating the maximum load considered during bridge design; t S represents the total cross-sectional area of ​​the bridge, used to express the overall cross-sectional dimensions of the bridge structure; ρ S represents the material density of a bridge. q This indicates the effective cross-sectional area of ​​the bridge.

[0084] It should be added that the material density S of the bridge ρ This is related to the weight and strength of the bridge. For the effective cross-sectional area S of the bridge... q It is related to the bending stiffness of the bridge.

[0085] Figure 3 This invention provides a flowchart for recording the dynamic behavior of a seismic isolation device under different seismic waves, and simultaneously recording the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves over the same time period, as shown in the example. Figure 3 As shown, the dynamic behavior of the seismic isolation device under different seismic waves is recorded, and the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves are recorded over the same time period. Specifically, this includes:

[0086] S210. Based on historical earthquake data of the bridge location, several similar seismic wave data sets are set up, and each set of seismic wave data is respectively input into the bridge three-dimensional model A and the bridge three-dimensional model B to simulate the dynamic response of the bridge under earthquake action.

[0087] S220. Establish data analysis group A and data analysis group B respectively. After each set of seismic wave data is input into the three-dimensional model A of the bridge, the changes in the seismic isolation device data and the changes in the shape of the bridge are recorded in data analysis group A. After each set of seismic wave data is input into the three-dimensional model B of the bridge, the changes in the shape of the bridge are recorded in data analysis group B.

[0088] After each set of seismic wave data is input into the bridge's 3D model A, the corresponding function expression for the data changes of the seismic isolation device is:

[0089]

[0090] Where ΔD represents the displacement change of the seismic isolation device in the three-dimensional model A of the bridge, α p ω represents the peak ground acceleration of the seismic wave in the 3D model A of the bridge. s ω represents the natural frequency of the bridge structure in the 3D model A of the bridge. f ξ represents the frequency of the seismic waves in the three-dimensional model A of the bridge; d The damping ratio of the seismic isolation device in the 3D model A of the bridge represents the energy dissipation capacity of the seismic isolation device during vibration; T d ξ represents the duration of the seismic wave in the 3D model A of the bridge, indicating the length of time the seismic wave has acted; β is the frequency ratio in the 3D model A of the bridge, representing the ratio of the seismic wave frequency to the natural frequency of the bridge structure; s is the damping ratio of the bridge structure in the three-dimensional bridge model A, used to represent the bridge structure's ability to dissipate energy during vibration.

[0091] After each set of seismic wave data is input into the bridge's 3D model A, the corresponding function expression for the bridge's morphological changes is:

[0092]

[0093] Where ΔS represents the displacement change of the bridge in the three-dimensional model A, D0 represents the initial displacement of the seismic isolation device in the three-dimensional model A, and n represents the power exponent, which is used to amplify or reduce the influence of the seismic isolation device data change on the bridge morphology change.

[0094] Furthermore, after each set of seismic wave data is input into the bridge's 3D model B, the corresponding function expression for the bridge's morphological changes is:

[0095]

[0096] Where, ΔS B α represents the displacement change of the bridge in the 3D model B. p，B ω represents the peak ground acceleration of the seismic wave in the 3D model B of the bridge. s,B ξ represents the natural frequency of the bridge structure in the 3D model B of the bridge; s，B T is the damping ratio of the bridge structure in the 3D model B, used to represent the bridge structure's ability to dissipate energy during vibration; d，B β represents the duration of the seismic wave in the 3D model B of the bridge, used to indicate the length of time the seismic wave acts; B ω represents the frequency ratio in the 3D model B of the bridge, used to express the ratio of the seismic wave frequency to the natural frequency of the bridge structure; f,B ΔD represents the frequency of the seismic wave in the three-dimensional model B of the bridge. B D represents the displacement change of the seismic isolation device in the three-dimensional model B of the bridge. 0，BThis represents the initial displacement of the seismic isolation device in the three-dimensional model B of the bridge.

[0097] Figure 4 A flowchart illustrating the analysis of morphological change data of bridge 3D model A and bridge 3D model B under different seismic wave actions, and evaluating the effectiveness of the seismic isolation device in reducing structural response and extending structural service life, is provided in this embodiment of the invention. Figure 4 As shown, the analysis of the morphological changes of bridge 3D model A and bridge 3D model B under different seismic wave actions evaluates the effectiveness of the seismic isolation device in reducing structural response and extending structural service life, specifically including:

[0098] S310. Compare the structural responses of bridge 3D model A and bridge 3D model B under the same seismic wave action, and analyze the influence of the seismic isolation device on the response of various parts of the bridge.

[0099] S320 assesses and quantifies the effectiveness of seismic isolation devices in reducing the maximum structural response, minimizing structural damage, and improving seismic performance based on the comparison results of structural responses.

[0100] S330. Based on the structural responses of bridge 3D model A and bridge 3D model B, structural aging predictions are performed on bridge 3D model A and bridge 3D model B respectively, and the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging is analyzed.

[0101] In step S330, the effectiveness of the seismic isolation device in reducing structural fatigue damage and delaying structural aging is expressed by the following function:

[0102]

[0103] Where E represents the effectiveness of the seismic isolation device in reducing structural fatigue damage and delaying structural aging, and T... total R represents the total duration of seismic wave action. A，i R represents the structural response of the bridge's three-dimensional model A at time point i. B，i This represents the structural response of the bridge's 3D model B at time point i, where N represents the number of measurement time points, and F... A，max F represents the maximum fatigue damage factor of the three-dimensional bridge model A under seismic wave action. B，max A represents the maximum fatigue damage factor of bridge 3D model B under seismic wave action. j B represents the aging index of the three-dimensional bridge model A at the j-th measurement point. j A represents the aging index of the three-dimensional bridge model B at the j-th measurement point. max η1 represents the maximum aging index of all measurement points in the three-dimensional model A of the bridge, M represents the number of measurement points, and η1 and η2 represent the first weighting coefficients.

[0104] Figure 5 A flowchart for calculating the cost difference between bridge projects with and without seismic isolation devices, provided as an embodiment of the present invention, is shown below. Figure 5 As shown, the assessment of the impact of introducing seismic isolation devices on the overall cost of bridge engineering includes calculating the cost difference between bridge engineering projects with and without seismic isolation devices, specifically including:

[0105] S410, collect the bridge engineering cost A including seismic isolation devices and the bridge engineering cost B without seismic isolation devices, and combine the results of the effectiveness analysis of seismic isolation devices in reducing structural fatigue damage and delaying structural aging to obtain the evaluation period of bridge engineering cost A and bridge engineering cost B respectively.

[0106] S420 calculates the engineering and maintenance costs of bridge engineering cost A and bridge engineering cost B within the corresponding evaluation period, and evaluates the economic optimization of bridge engineering cost by introducing seismic isolation devices.

[0107] Figure 6 A structural block diagram of a bridge seismic isolation effect evaluation system for bridge engineering provided in an embodiment of the present invention is shown below. Figure 6 As shown, a bridge seismic isolation effect evaluation system for bridge engineering is provided, the system comprising:

[0108] The data integration and model building module 100 is used to establish a bridge analysis database, collect and store bridge structural data and material data, obtain the design data of the seismic isolation device of the bridge, and based on all the data obtained above, establish a three-dimensional bridge model A containing a seismic isolation device model and a three-dimensional bridge model B without a seismic isolation device model.

[0109] This module begins by comprehensively collecting detailed data on the bridge and its seismic isolation devices, including basic parameters, structural dimensions, performance data, and the type, size, and quantity of the seismic isolation devices. This data is integrated and stored in a specially designed bridge analysis database, ensuring data integrity and ease of retrieval. Subsequently, using this data, specialized software is employed to construct a 3D model A of the bridge including seismic isolation devices and a model B without them, ensuring that the models accurately reflect the actual bridge structure and the configuration of the seismic isolation devices. The significant advantage of this module lies in its comprehensiveness and accuracy, providing a solid foundation for subsequent analysis.

[0110] Meanwhile, the module's design takes into account future scalability and adaptability, enabling the method to adapt to ever-changing engineering needs and technological advancements. Furthermore, through precise modeling and data analysis, the economic benefits of seismic isolation devices can be evaluated more effectively, providing a scientific basis for investment decisions in bridge engineering.

[0111] The dynamic simulation recording module 200 is used to set several seismic wave data sets and set the same time history. The several seismic wave data sets are respectively substituted into the three-dimensional bridge model A and the three-dimensional bridge model B, and the dynamic behavior of the seismic isolation device under the action of different seismic waves is recorded. At the same time, the morphological changes of the three-dimensional bridge model A and the three-dimensional bridge model B under the action of different seismic waves are recorded in the same time history.

[0112] This module meticulously sets up and executes seismic response simulations for two bridge 3D models (Bridge 3D Model A and Bridge 3D Model B) with different configurations. First, based on historical seismic data of the bridge's location, the module carefully selects and sets a series of seismic wave data sets, ensuring that these data sets represent the seismic scenarios that the area might encounter. Subsequently, these seismic wave data sets are input into Bridge 3D Model A (including seismic isolation devices) and Bridge 3D Model B (without seismic isolation devices), respectively, to simulate the dynamic response of the bridge under seismic loading.

[0113] To systematically collect and analyze the results of earthquake simulations, this module also includes the establishment of two data analysis groups (Data Analysis Group A and Data Analysis Group B). Data Analysis Group A is responsible for collecting and analyzing the performance data of the seismic isolation devices and the morphological changes of the bridge's 3D model A under various seismic wave loads, while Data Analysis Group B records and analyzes the morphological changes of the bridge's 3D model B under the same seismic conditions. This grouping method not only helps to intuitively compare the effectiveness of the seismic isolation devices but also clearly demonstrates the specific impact of the seismic isolation devices on the dynamic behavior of the bridge.

[0114] This module provides direct evidence of the actual effectiveness of seismic isolation devices by accurately simulating different seismic scenarios, which is crucial for evaluating the practical value of seismic isolation technology. Secondly, the module's methodology and technical framework allow for easy expansion or modification of seismic wave datasets to adapt to new research needs or new seismic data, ensuring the modernity and adaptability of the methodology. Finally, through detailed data collection and analysis, not only is the model's predictive accuracy enhanced, but also solid data support is provided for subsequent cost-benefit analyses and engineering decisions.

[0115] The performance analysis module 300 is used to analyze the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves to evaluate the effectiveness of the seismic isolation device in reducing structural response and extending structural service life.

[0116] The effectiveness of seismic isolation devices is evaluated by comparing and analyzing the structural responses of bridge 3D model A (including seismic isolation devices) and bridge 3D model B (without seismic isolation devices) under the same seismic wave action. This module first compares the dynamic responses of the two models under seismic action, and then analyzes in detail the specific impact of the seismic isolation devices on the responses of various parts of the bridge. Through this comparison, the effectiveness of seismic isolation devices in reducing the maximum structural response, reducing structural damage, and improving seismic performance can be quantified.

[0117] Furthermore, this module includes structural aging prediction for two models, analyzing the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging. This analysis not only focuses on the immediate response during earthquakes but also considers structural durability and lifespan extension during long-term use, providing important reference for the long-term maintenance and use of bridges.

[0118] Through detailed comparative analysis and structural aging prediction, this module provides a comprehensive assessment of the effectiveness of seismic isolation devices, including not only immediate seismic response but also long-term structural health and life prediction. This comprehensive analytical approach helps engineering decision-makers better understand the value of seismic isolation technology, thereby enabling them to make more scientific and economical decisions in bridge design and maintenance.

[0119] The scalability of this module is reflected in the flexibility and extensibility of its analytical framework. As technology advances and new data emerges, this module can easily integrate new analytical tools and methods, such as more advanced structural analysis software or new aging models, to improve the accuracy and depth of the analysis. This scalability ensures the continued relevance and effectiveness of the methods, enabling them to adapt to ever-changing engineering needs and technological advancements.

[0120] The economic assessment module 400 is used to assess the impact of introducing seismic isolation devices on the overall cost of bridge engineering based on the analysis results, and to calculate the cost difference between bridge engineering projects with and without seismic isolation devices.

[0121] This module assesses the economic impact of seismic isolation devices on bridge construction costs by analyzing and comparing the costs of bridge projects (A) with and without seismic isolation devices (B). It first collects and analyzes the construction and maintenance costs of the two different configurations, including initial construction costs and long-term maintenance costs. By incorporating the analysis results regarding the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging, the total cost of the two types of bridges can be predicted more accurately over different evaluation periods.

[0122] The engineering and maintenance costs of bridge engineering costs A and B are calculated separately for their respective evaluation periods, including forecasts and considerations for future maintenance expenses. This detailed cost analysis allows for the assessment of the economic optimization effect of introducing seismic isolation devices on bridge engineering costs, i.e., whether it saves costs and improves return on investment in the long term.

[0123] By combining technical performance analysis with economic cost analysis, this module provides a comprehensive perspective for evaluating the economic value of seismic isolation devices. This integrated assessment not only helps engineering decision-makers understand the economic benefits of seismic isolation technology but also provides crucial decision support in project planning and budget allocation.

[0124] As market conditions change, such as fluctuations in material and labor costs, this module can easily adjust the cost calculation model to maintain the accuracy and relevance of the analysis. Simultaneously, as new economic analysis tools and methods develop, these new tools can be integrated to improve the accuracy and depth of cost forecasting. This scalability ensures that the method can adapt to constantly changing engineering and economic environments, maintaining its effectiveness as a decision support tool.

[0125] Figure 7 The structural block diagram of the data integration and model building module provided in the embodiments of the present invention is as follows: Figure 7 As shown, the data integration and model building module includes:

[0126] The bridge data integration unit 110 is used to collect all data of the bridge and seismic isolation device data. The total data of the bridge includes basic parameters, structural dimensions and performance data. The seismic isolation device data includes type, size and quantity. The unit also establishes a bridge analysis database and stores all collected data in the bridge analysis database.

[0127] The three-dimensional model building unit 120 is used to build a three-dimensional bridge model A and a three-dimensional bridge model B based on the content of the bridge analysis database. The three-dimensional bridge model A includes a seismic isolation device model, while the three-dimensional bridge model B does not include a seismic isolation device model.

[0128] Figure 8 This is a structural block diagram of the dynamic simulation recording module provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the dynamic simulation recording module includes:

[0129] The seismic wave simulation unit 210 is used to set up several similar seismic wave data groups based on the historical seismic data of the bridge location, and to input each group of seismic wave data into the bridge three-dimensional model A and the bridge three-dimensional model B respectively to simulate the dynamic response of the bridge under seismic action.

[0130] The dynamic response analysis unit 220 is used to establish data analysis group A and data analysis group B respectively, to obtain the changes in the seismic isolation device and the morphological changes of the bridge after each set of seismic wave data is introduced into the three-dimensional model A of the bridge, and to record them in data analysis group A; and to obtain the changes in the morphological changes of the bridge after each set of seismic wave data is introduced into the three-dimensional model B of the bridge, and to record them in data analysis group B.

[0131] Figure 9 This is a structural block diagram of the performance analysis module provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the performance analysis module includes:

[0132] Structural response comparison unit 310 is used to compare the structural responses of bridge 3D model A and bridge 3D model B under the same seismic wave action, and to analyze the influence of the seismic isolation device on the response of various parts of the bridge.

[0133] The seismic isolation performance evaluation unit 320 is used to evaluate and quantify the effectiveness of the seismic isolation device in reducing the maximum structural response, reducing structural damage, and improving seismic performance based on the comparison results of structural response.

[0134] The durability prediction unit 330 is used to predict the structural aging of bridge three-dimensional model A and bridge three-dimensional model B respectively based on the structural response of bridge three-dimensional model A and bridge three-dimensional model B, and to analyze the effectiveness of the seismic isolation device in reducing structural fatigue damage and delaying structural aging.

[0135] Figure 10 A structural block diagram of the economic evaluation module provided in the embodiments of the present invention, such as... Figure 10 As shown, the economic evaluation module includes:

[0136] Cost analysis unit 410 is used to collect the bridge engineering cost A including seismic isolation devices and the bridge engineering cost B without seismic isolation devices, and to obtain the evaluation period of bridge engineering cost A and bridge engineering cost B respectively by combining the effectiveness analysis results of seismic isolation devices in reducing structural fatigue damage and delaying structural aging.

[0137] The economic benefit assessment unit 420 is used to calculate the engineering cost and maintenance cost of bridge engineering cost A and bridge engineering cost B in the corresponding assessment period, and to assess the economic optimization of bridge engineering cost by introducing seismic isolation devices.

[0138] It should be understood that although the steps in the flowcharts of the various embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the various embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0139] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0140] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0141] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0142] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for evaluating the seismic isolation effect of bridges in bridge engineering, characterized in that, The method includes: Establish a bridge analysis database, collect and store bridge structural data and material data, and obtain the design data of the seismic isolation device for the bridge. Based on all the data obtained above, establish a three-dimensional model of the bridge A that includes the seismic isolation device model and a three-dimensional model of the bridge B that does not include the seismic isolation device model. Several sets of seismic wave data were set, and the same time history was set. The sets of seismic wave data were respectively substituted into bridge 3D model A and bridge 3D model B, and the dynamic behavior of the seismic isolation device under different seismic waves was recorded. At the same time, the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves were recorded in the same time history. Analyze the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves to evaluate the effectiveness of the seismic isolation device in reducing structural response and extending structural service life. Based on the analysis results, the impact of introducing seismic isolation devices on the overall cost of bridge engineering is assessed, and the cost difference between bridge engineering with and without seismic isolation devices is calculated. The establishment of a three-dimensional bridge model A containing a seismic isolation device model and a three-dimensional bridge model B without a seismic isolation device model specifically includes: Collect all data on the bridge and the seismic isolation devices. The bridge data includes basic parameters, structural dimensions and performance data. The seismic isolation device data includes type, size and quantity. Establish a bridge analysis database and store all collected data in the bridge analysis database. Based on the content of the bridge analysis database, a three-dimensional model A and a three-dimensional model B of the bridge are established. The three-dimensional model A of the bridge includes a seismic isolation device model, while the three-dimensional model B of the bridge does not include a seismic isolation device model.

2. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 1, characterized in that, The functional expression of the three-dimensional bridge model A, which includes the seismic isolation device model, is as follows: Where f(B, S, I) represents the function output of the 3D bridge model A containing the seismic isolation device model; B represents the basic parameters of the bridge, S represents the structural dimensions of the bridge, and I represents the parameters of the seismic isolation device. s This indicates the static load-bearing capacity of a bridge, representing the maximum static load a bridge can withstand without structural failure; S e I represents the effective elastic modulus of a bridge structure. f I represents the efficiency factor of the seismic isolation device. n Indicates the number of seismic isolation devices, B m B represents the overall mass of the bridge structure. l B represents the total length of the bridge. w I represents the total width of the bridge. t Indicates the type coefficient of the seismic isolation device, I d Indicates the damping coefficient of the seismic isolation device; The function expression for the 3D bridge model B, which does not include a seismic isolation device model, is: Where g(B, S) represents the function output of the three-dimensional bridge model B without the seismic isolation device model; S h S represents the height of the bridge, used to indicate the distance from the bridge deck to the bottom of the piers. r B is the span ratio of a bridge, used to represent the proportion of lengths between the spans of a bridge. d S represents the design load of a bridge, indicating the maximum load considered during bridge design; t S represents the total cross-sectional area of ​​the bridge, used to express the overall cross-sectional dimensions of the bridge structure; ρ S represents the material density of a bridge. q This indicates the effective cross-sectional area of ​​the bridge.

3. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 2, characterized in that, The dynamic behavior of the seismic isolation device under different seismic waves is recorded, and the morphological changes of bridge 3D model A and bridge 3D model B under different seismic waves are also recorded over the same time period. Specifically, this includes: Based on historical earthquake data of the bridge location, several similar seismic wave data sets were set up, and each set of seismic wave data was respectively input into the bridge 3D model A and bridge 3D model B to simulate the dynamic response of the bridge under seismic action. Data analysis group A and data analysis group B were established separately. After each set of seismic wave data was input into the three-dimensional model A of the bridge, the changes in the seismic isolation device data and the changes in the shape of the bridge were recorded in data analysis group A. After each set of seismic wave data was input into the three-dimensional model B of the bridge, the changes in the shape of the bridge were recorded in data analysis group B.

4. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 3, characterized in that, After each set of seismic wave data is input into the bridge's 3D model A, the corresponding function expression for the data changes of the seismic isolation device is: Where ΔD represents the displacement change of the seismic isolation device in the three-dimensional model A of the bridge, α p ω represents the peak ground acceleration of the seismic wave in the 3D model A of the bridge. s ω represents the natural frequency of the bridge structure in the 3D model A of the bridge. f ξ represents the frequency of the seismic waves in the three-dimensional model A of the bridge; d The damping ratio of the seismic isolation device in the 3D model A of the bridge represents the energy dissipation capacity of the seismic isolation device during vibration; T d ξ represents the duration of the seismic wave in the 3D model A of the bridge, indicating the length of time the seismic wave has acted; β is the frequency ratio in the 3D model A of the bridge, representing the ratio of the seismic wave frequency to the natural frequency of the bridge structure; s The damping ratio of the bridge structure in the three-dimensional model A of the bridge is used to represent the energy dissipation capacity of the bridge structure during vibration. After each set of seismic wave data is input into the bridge's 3D model A, the corresponding function expression for the bridge's morphological changes is: Where ΔS represents the displacement change of the bridge in the three-dimensional model A, D0 represents the initial displacement of the seismic isolation device in the three-dimensional model A, and n represents the power exponent, which is used to amplify or reduce the influence of the seismic isolation device data change on the bridge morphology change.

5. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 4, characterized in that, After each set of seismic wave data is input into the bridge's 3D model B, the corresponding function expression for the bridge's morphological changes is: Where, ΔS B α represents the displacement change of the bridge in the 3D model B. p，B ω represents the peak ground acceleration of the seismic wave in the 3D model B of the bridge. s，B ξ represents the natural frequency of the bridge structure in the 3D model B of the bridge; s，B T is the damping ratio of the bridge structure in the 3D model B, used to represent the bridge structure's ability to dissipate energy during vibration; d，B β represents the duration of the seismic wave in the 3D model B of the bridge, used to indicate the length of time the seismic wave acts; B ω represents the frequency ratio in the 3D model B of the bridge, used to express the ratio of the seismic wave frequency to the natural frequency of the bridge structure; f，B ΔD represents the frequency of the seismic waves in the three-dimensional model B of the bridge. B D represents the displacement change of the seismic isolation device in the three-dimensional model B of the bridge. 0，B This represents the initial displacement of the seismic isolation device in the three-dimensional model B of the bridge.

6. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 5, characterized in that, The analysis of the morphological change data of bridge 3D model A and bridge 3D model B under different seismic wave actions evaluates the effectiveness of the seismic isolation device in reducing structural response and extending structural service life, specifically including: By comparing the structural responses of bridge 3D model A and bridge 3D model B under the same seismic wave, the influence of the seismic isolation device on the response of various parts of the bridge is analyzed. Based on the comparison results of structural responses, the effectiveness of seismic isolation devices in reducing the maximum structural response, reducing structural damage, and improving seismic performance is evaluated and quantified. Based on the structural responses of bridge 3D model A and bridge 3D model B, structural aging predictions were performed on bridge 3D model A and bridge 3D model B respectively, and the effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging was analyzed.

7. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 6, characterized in that, The effectiveness of seismic isolation devices in reducing structural fatigue damage and delaying structural aging can be expressed by the following functional expression: Where E represents the effectiveness of the seismic isolation device in reducing structural fatigue damage and delaying structural aging, and T... total R represents the total duration of seismic wave action. A，i R represents the structural response of the bridge's three-dimensional model A at time point i. B，i This represents the structural response of the bridge's 3D model B at time point i, where N represents the number of measurement time points, and F... A，max F represents the maximum fatigue damage factor of the three-dimensional bridge model A under seismic wave action. B，max A represents the maximum fatigue damage factor of bridge 3D model B under seismic wave action. j Let B represent the aging index of bridge 3D model A at the j-th measurement point, and let A represent the aging index of bridge 3D model B at the j-th measurement point. max η1 represents the maximum aging index of all measurement points in the three-dimensional model A of the bridge, M represents the number of measurement points, and η1 and η2 represent the first weighting coefficients.

8. The method for evaluating the seismic isolation effect of bridges for bridge engineering according to claim 7, characterized in that, The assessment evaluates the impact of introducing seismic isolation devices on the overall cost of bridge construction, calculating the cost difference between bridge projects with and without seismic isolation devices, specifically including: Collect the bridge engineering cost A (including seismic isolation devices) and the bridge engineering cost B (without seismic isolation devices), and combine the results of the effectiveness analysis of seismic isolation devices in reducing structural fatigue damage and delaying structural aging to obtain the evaluation period for bridge engineering cost A and bridge engineering cost B respectively. Calculate the engineering and maintenance costs of bridge engineering cost A and bridge engineering cost B respectively within the corresponding evaluation period, and evaluate the economic optimization of bridge engineering cost by introducing seismic isolation devices.

9. A bridge seismic isolation effect evaluation system for bridge engineering, characterized in that, The system, employing the bridge seismic isolation effect evaluation method for bridge engineering as described in any one of claims 1 to 8, comprises: The data integration and model building module is used to establish a bridge analysis database, collect and store bridge structural data and material data, obtain the design data of the seismic isolation device of the bridge, and based on all the data obtained above, establish a three-dimensional bridge model A containing the seismic isolation device model and a three-dimensional bridge model B without the seismic isolation device model. The dynamic simulation recording module is used to set several sets of seismic wave data and set the same time history. The several sets of seismic wave data are respectively substituted into the three-dimensional model A and the three-dimensional model B of the bridge, and the dynamic behavior of the seismic isolation device under the action of different seismic waves is recorded. At the same time, the morphological changes of the three-dimensional model A and the three-dimensional model B of the bridge under the action of different seismic waves are recorded in the same time history. The performance analysis module is used to analyze the morphological change data of bridge 3D model A and bridge 3D model B under different seismic waves, and to evaluate the effectiveness of the seismic isolation device in reducing structural response and extending structural service life. The economic evaluation module is used to assess the impact of introducing seismic isolation devices on the overall cost of bridge engineering based on the analysis results, and to calculate the cost difference between bridge engineering projects with and without seismic isolation devices.

10. A bridge seismic isolation effect evaluation system for bridge engineering according to claim 9, characterized in that, The data integration and model building module includes: The bridge data integration unit is used to collect all data of the bridge and seismic isolation device data. The bridge data includes basic parameters, structural dimensions and performance data. The seismic isolation device data includes type, size and quantity. The unit also establishes a bridge analysis database and stores all collected data in the bridge analysis database. The three-dimensional model building unit is used to build a three-dimensional bridge model A and a three-dimensional bridge model B based on the content of the bridge analysis database. The three-dimensional bridge model A includes a seismic isolation device model, while the three-dimensional bridge model B does not include a seismic isolation device model. The dynamic simulation recording module includes: The seismic wave simulation unit is used to set up several similar seismic wave data groups based on the historical seismic data of the bridge location, and to input each group of seismic wave data into the bridge 3D model A and the bridge 3D model B respectively to simulate the dynamic response of the bridge under seismic action. The dynamic response analysis unit is used to establish data analysis group A and data analysis group B respectively. After each set of seismic wave data is input into the three-dimensional model A of the bridge, the data changes of the seismic isolation device and the morphological changes of the bridge are recorded in data analysis group A. After each set of seismic wave data is input into the three-dimensional model B of the bridge, the morphological changes of the bridge are recorded in data analysis group B. The performance analysis module includes: The structural response comparison unit is used to compare the structural responses of bridge 3D model A and bridge 3D model B under the same seismic wave action, and to analyze the impact of the seismic isolation device on the response of various parts of the bridge. The seismic isolation performance evaluation unit is used to evaluate and quantify the effectiveness of seismic isolation devices in reducing the maximum structural response, reducing structural damage, and improving seismic performance based on the comparison results of structural responses. The durability prediction unit is used to predict the structural aging of bridge 3D model A and bridge 3D model B based on their structural responses, and to analyze the effectiveness of the seismic isolation device in reducing structural fatigue damage and delaying structural aging. The economic assessment module includes: The cost analysis unit is used to collect the bridge engineering cost A (including seismic isolation devices) and the bridge engineering cost B (without seismic isolation devices), and, in conjunction with the effectiveness analysis results of seismic isolation devices in reducing structural fatigue damage and delaying structural aging, to obtain the evaluation period for bridge engineering cost A and bridge engineering cost B respectively. The economic benefit assessment unit is used to calculate the engineering cost and maintenance cost of bridge engineering cost A and bridge engineering cost B respectively within the corresponding assessment period, and to assess the economic optimization of bridge engineering cost by introducing seismic isolation devices.

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