BIM-based system and method for evaluating seismic performance of building structure

Abstract

The present application relates to the technical field of seismic performance evaluation for building structures, and in particular to a BIM-based system and method for evaluating the seismic performance of a building structure. The method comprises: acquiring BIM data of a target building structure, and extracting geometric features and material properties thereof; on the basis of the geometric features and the material properties, generating a finite element analysis model under multiple load cases; performing dynamic response simulation on the finite element analysis model to obtain key performance indicators under the load cases; and on the basis of the key performance indicators combined with preset evaluation criteria, outputting an evaluation result of the seismic performance of the building structure. The present application can improve the automation level, application scope and accuracy of seismic performance evaluation, and also realizes the comprehensive analysis of complex building structures.

Description

BIM-based building structure seismic performance evaluation system and method Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and specifically relates to a BIM-based building structure seismic performance evaluation system and method. Background Art

[0002] As the construction industry's requirements for safety and reliability continue to increase, BIM (Building Information Modeling)-based building structure seismic performance assessment systems and methods have gradually become a research hotspot. Although various existing assessment methods have achieved good results in certain application scenarios, they still have some shortcomings that affect the accuracy and efficiency of the assessment.

[0003] After searching, a displacement-based method for evaluating the seismic performance of masonry structures was found with publication number CN110674595B, with a publication date of April 7, 2023. This patent determines the seismic performance of masonry structures by calculating the maximum interlayer elastoplastic displacement capacity of masonry structures and the yield displacement requirements of weak structural layers under different categories of seismic measures. However, this technical solution is mainly aimed at masonry structures, and the evaluation method for complex building structures (such as steel structures, concrete structures, etc.) is not comprehensive enough and has a limited scope of application. In addition, this method relies on a large amount of manual calculation and analysis, and the degree of automation is not high, making it difficult to achieve fast and efficient evaluation.

[0004] After searching, a method and system for evaluating the seismic performance of a distribution cabinet for nuclear power plants was found with publication number CN116383919B, with a publication date of November 10, 2023. This patent constructs a test parameter set through big data, performs equipment control of the vibration fitting equipment, reads the interactive signal of the distribution cabinet, outputs a first performance evaluation result, and outputs a second performance evaluation result based on the image acquisition result. This method has high accuracy and reliability in the evaluation of specific equipment, but its applicability and operability are limited in the overall evaluation of building structures, especially in the evaluation of large-scale building complexes. In addition, this method mainly relies on sensors and big data, lacks in-depth analysis of the characteristics of the building structure itself, and is difficult to fully reflect the seismic performance of the building structure under different working conditions. Technical issues

[0005] The above issues indicate that existing methods for assessing the seismic performance of building structures still have certain deficiencies in terms of scope of application, degree of automation, assessment accuracy, and comprehensiveness. Therefore, the present invention provides a BIM-based system and method for assessing the seismic performance of building structures, aiming to improve the degree of automation, expand the scope of application, and enhance the accuracy and comprehensiveness of assessments, thereby meeting the modern construction industry's demand for efficient and intelligent assessment systems. Technical Solutions

[0006] In order to solve the above problems in the prior art, the present invention provides a BIM-based building structure seismic performance evaluation system and method, which can improve the automation level, scope of application and accuracy of seismic performance evaluation, and at the same time realize comprehensive analysis of complex building structures.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] In a first aspect, the present invention provides a method for evaluating the seismic performance of a building structure based on BIM, comprising the steps of:

[0009] Step 1: Obtain the BIM model data of the target building structure and extract its geometric features and material properties;

[0010] Step 2: Based on the geometric features and material properties, generate a finite element analysis model under multiple working conditions;

[0011] Step 3: Perform dynamic response simulation on the finite element analysis model to obtain key performance indicators under various working conditions;

[0012] Step 4: Based on the key performance indicators and the preset evaluation criteria, output the seismic performance evaluation results of the building structure.

[0013] Optionally, generating a finite element analysis model under multiple working conditions based on the geometric features and material properties includes:

[0014] Extract key node information and connection relationships of building structures through BIM model analysis module;

[0015] According to the key node information and connection relationship, combined with the load conditions under different working conditions, a corresponding finite element mesh model is constructed;

[0016] The finite element mesh model is optimized to ensure a balance between model accuracy and computational efficiency. Optionally, the dynamic response simulation formula is:

[0017] Among them, R is the dynamic response score; E max is the maximum elastic strain energy; E th is the set elastic strain energy threshold; T eff is the effective vibration period; T ref is the reference vibration period; γ and δ are weight coefficients configured according to different building types.

[0018] Optionally, obtaining BIM model data of the target building structure specifically includes: exporting a comprehensive data set including geometric information, material properties and construction stage information from a BIM platform.

[0019] Optionally, the method further comprises the steps of:

[0020] If key geometry or material information is missing in the BIM model data, it will be automatically marked as invalid data and the user will be prompted to supplement the relevant information.

[0021] Optionally, the method further comprises the steps of:

[0022] When the simulation result of the finite element analysis model does not meet the convergence condition, performing adaptive mesh refinement processing on the model;

[0023] Rerun the dynamic response simulation until convergence criteria are met.

[0024] Optionally, when the simulation result of the finite element analysis model fails to meet the convergence condition, the method includes:

[0025] When the maximum displacement in the simulation results exceeds the set threshold, or when the stress distribution of key nodes fluctuates abnormally, or the energy error of the overall model exceeds the allowable range.

[0026] Optionally, the outputting of the seismic performance evaluation results of the building structure based on the key performance indicators and in combination with preset evaluation criteria is specifically as follows: through a multi-level evaluation algorithm, the key performance indicators are mapped into a seismic grade classification table to generate a visual evaluation report.

[0027] Optionally, the extracting of key node information and connection relationships of the building structure through the BIM model parsing module specifically includes: using a topological analysis algorithm to identify major load-bearing components and their interaction relationships in the BIM model.

[0028] In a second aspect, the present invention provides a BIM-based building structure seismic performance evaluation system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the BIM-based building structure seismic performance evaluation method of the first aspect is implemented.

[0029] Among them, the technical effects corresponding to the BIM-based building structure seismic performance evaluation system provided in the second aspect refer to the relevant description of the BIM-based building structure seismic performance evaluation method provided in the first aspect. Beneficial effects

[0030] This invention achieves a comprehensive assessment of the seismic performance of building structures through in-depth analysis of BIM model data and dynamic simulation of finite element analysis models. A multi-level evaluation algorithm and kernel parameter adjustment mechanism significantly improve the accuracy and practicality of the assessment results. Furthermore, the application of multi-kernel learning methods enables more precise analysis and prediction of structural behavior in high-dimensional space, thereby improving the safety and reliability of building structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic diagram of the main process of a method for evaluating seismic performance of a building structure based on BIM according to an embodiment of the present invention;

[0032] FIG2 is a schematic diagram of a BIM model data extraction process according to an embodiment of the present invention;

[0033] FIG3 is a schematic diagram of finite element analysis model generation and optimization processing involved in an embodiment of the present invention;

[0034] FIG4 is a schematic diagram of visualization of dynamic response simulation results according to an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of the framework of the BIM-based building structure seismic performance evaluation system according to an embodiment of the present invention.

[0036] Explanation of the accompanying symbols: 1. BIM-based building structure seismic performance assessment system; 2. Processor; 3. Memory. Best Mode for Carrying Out the Invention

[0037] The present invention provides a BIM-based building structure seismic performance assessment system and method. Its core is to achieve a comprehensive, automated assessment of the seismic performance of building structures by combining BIM model data with finite element analysis technology. The following describes the specific implementation of the present invention in detail, with reference to Figures 1 to 5 and specific examples.

[0038] In practical applications, the first step is to obtain the BIM model data of the target building structure. As shown in Figure 2, this process involves exporting a comprehensive dataset containing geometric information, material properties, and construction stage information from the BIM platform. This data is the basis for subsequent analysis, so its completeness and accuracy must be ensured. If key geometric or material information is missing during the data extraction process, the system will automatically mark it as invalid data and prompt the user to supplement the relevant information. For example, in the seismic performance assessment of a high-rise building, if the BIM model does not include the material properties of certain load-bearing columns, the system will generate a prompt message, requiring the user to supplement this data to ensure the reliability of subsequent analysis.

[0039] After acquiring the BIM model data, the next step is to generate finite element analysis models for multiple working conditions based on geometric features and material properties. As shown in Figure 3, this process includes multiple steps: First, the BIM model parsing module extracts key node information and connection relationships of the building structure. Specifically, a topological analysis algorithm is used to identify the main load-bearing components in the BIM model and their interactions. For example, in a frame-structured building, the system can automatically identify major load-bearing components such as beams, columns, and slabs and determine the connection methods between them. Subsequently, based on the extracted key node information and connection relationships, combined with the load conditions under different working conditions, the corresponding finite element mesh model is constructed. To ensure a balance between model accuracy and computational efficiency, the system optimizes the finite element mesh model. For example, in a complex building structure, the system adaptively adjusts the mesh density based on the characteristics of local stress concentration areas, thereby ensuring computational accuracy while reducing computing resource consumption.

[0040] After the finite element analysis model is generated, the next step is to perform dynamic response simulation on the model. The core of this process is to obtain the key performance indicators under various working conditions through numerical simulation. The formula for dynamic response simulation is Where R is the dynamic response score; E max is the maximum elastic strain energy; E th is the set elastic strain energy threshold; T eff is the effective vibration period; T ref is the reference vibration period; γ and δ are weight coefficients configured according to different building types. Taking a reinforced concrete frame structure as an example, assuming that its maximum elastic strain energy E max is 500kJ, the elastic strain energy threshold E th is 1000kJ, effective vibration period T eff is 0.8 seconds, with reference to the vibration period T ref is 1.0 second, and γ and δ are 0.6 and 0.4 respectively, the dynamic response score is This score can intuitively reflect the seismic performance of a building structure under specific working conditions.

[0041] During the dynamic response simulation process, the simulation results may not meet the convergence conditions. When the maximum displacement in the simulation results exceeds the set threshold, or when the stress distribution of key nodes fluctuates abnormally, or the energy error of the overall model exceeds the allowable range, the system will adaptively refine the model mesh. For example, in the seismic performance assessment of a bridge structure, if the maximum displacement of a key node exceeds the preset threshold of 10 mm, the system will automatically refine the mesh in that area and rerun the dynamic response simulation until the convergence conditions are met. This mechanism can significantly improve the reliability and accuracy of the simulation results.

[0042] After completing the dynamic response simulation, the system will output the seismic performance evaluation results of the building structure based on the key performance indicators combined with the preset evaluation criteria. As shown in Figure 4, this process is implemented through a multi-level evaluation algorithm, mapping the key performance indicators to the seismic grade classification table and generating a visual evaluation report. For example, in the seismic performance evaluation of a residential building, the system will classify its seismic performance into four levels of "excellent", "good", "qualified" or "unqualified" based on the dynamic response score R and other key performance indicators (such as maximum inter-story displacement angle, base shear force, etc.), and display the evaluation results in the form of charts. This visual report is not only easy for users to understand, but also can provide an important reference for subsequent structural optimization design.

[0043] In addition, the present invention also provides a BIM-based building structure seismic performance evaluation system, the framework of which is shown in Figure 5. The system includes a memory 3, a processor 2, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, it can implement all the steps of the above-mentioned BIM-based building structure seismic performance evaluation method. For example, in the seismic performance evaluation of a large commercial complex, the system calls the BIM model data in the memory through the processor, and completes operations such as data extraction, finite element model generation, dynamic response simulation and evaluation result output in sequence, and finally generates a detailed seismic performance evaluation report. The high efficiency and degree of automation of this system significantly improve the work efficiency of seismic performance evaluation.

[0044] In summary, the present invention realizes a comprehensive and automated evaluation of the seismic performance of building structures by combining BIM model data with finite element analysis technology. In practical applications, whether it is a high-rise building, a bridge or other complex structure, the present invention can provide accurate and reliable evaluation results. For example, in a seismic performance evaluation project of a building complex in an earthquake-prone area, the present invention was successfully applied to the seismic performance analysis of dozens of buildings, significantly improving the efficiency and accuracy of the evaluation work. At the same time, the system's adaptive grid refinement processing mechanism and multi-level evaluation algorithm further enhance the scientific nature and practicality of the evaluation results. It can be seen from the above embodiments that the present invention not only solves the problems existing in the prior art, but also provides a new solution for the field of seismic performance evaluation of building structures.

Claims

1. A BIM-based building structure seismic performance assessment method, characterized by The method comprises the following steps: Step 1: obtaining BIM model data of a target building structure and extracting its geometric features and material properties; Step 2: generating a finite element analysis model under multiple working conditions based on the geometric features and material properties; Step 3: performing dynamic response simulation on the finite element analysis model to obtain key performance indicators under each working condition; Step 4: Output the seismic performance evaluation results of the building structure based on the key performance indicators and preset evaluation standards.

2. The method according to claim 1, characterized in that The method of generating a finite element analysis model under multiple working conditions based on geometric features and material properties includes: extracting key node information and connection relationships of the building structure through a BIM model parsing module; constructing a corresponding finite element mesh model based on the key node information and connection relationships in combination with load conditions under different working conditions; and optimizing the finite element mesh model to ensure a balance between model accuracy and computational efficiency.

3. The method according to claim 1, characterized in that The formula for the dynamic response simulation is: Among them, R is the dynamic response score; E max is the maximum elastic strain energy; E th is the set elastic strain energy threshold; T eff is the effective vibration period; T ref is the reference vibration period; γ and δ are weight coefficients configured according to different building types.

4. The method according to claim 1, characterized in that The obtaining of the BIM model data of the target building structure specifically involves exporting a comprehensive data set including geometric information, material properties, and construction stage information from the BIM platform.

5. The method according to claim 1, characterized in that The following steps are also included: If key geometry or material information is missing in the BIM model data, it will be automatically marked as invalid data and the user will be prompted to supplement the relevant information.

6. The method according to claim 1, characterized in that The following steps are also included: When the simulation result of the finite element analysis model does not meet the convergence condition, the model is subjected to adaptive mesh refinement processing; Rerun the dynamic response simulation until convergence criteria are met.

7. The method according to claim 6, characterized in that The situation where the simulation results of the finite element analysis model fail to meet the convergence conditions includes: when the maximum displacement in the simulation results exceeds a set threshold, or when the stress distribution of key nodes fluctuates abnormally, or when the energy error of the overall model exceeds an allowable range.

8. The method according to claim 1, characterized in that Outputting the seismic performance evaluation result of the building structure according to the key performance indicators in combination with the preset evaluation standards is specifically as follows: mapping the key performance indicators into the seismic grade classification table through a multi-level evaluation algorithm to generate a visual evaluation report.

9. The method according to claim 2, characterized in that The extraction of key node information and connection relationships of the building structure through the BIM model parsing module specifically includes: using a topological analysis algorithm to identify the main load-bearing components in the BIM model and their interaction relationships.

10. A BIM-based building structure seismic performance evaluation system (1), characterized in that The method comprises a memory (3), a processor (2), and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for evaluating the seismic performance of a building structure based on BIM as claimed in any one of claims 1 to 9 when executing the computer program.

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