|Table of Contents|

Finite element models and seismic performance evaluation of in-service bridges based on measured data mapping(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2025年6期
Page:
1-16
Research Field:
桥梁智能运维与防灾减灾
Publishing date:

Info

Title:
Finite element models and seismic performance evaluation of in-service bridges based on measured data mapping
Author(s):
ZHOU Mi1; 2;  WANG Liang1; 2;  LIU Xu-qi1; 2
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Key Laboratory of Transport Industry of Bridge Detection Reinforcement Technology, Chang'an University, Xi'an 710064, Shaanxi, China)
Keywords:
bridge engineering;  seismic performance evaluation;  secondary development of CSI Bridge;  in-service bridge;  finite element model correction;  parameter sensitivity analysis
PACS:
U447
DOI:
-
Abstract:
To solve the problem of deviations between design parameters and as-built bridge condition caused by material performance degradation and construction errors, which affects the accuracy of seismic performance evaluation, a finite element model of an in-service bridge was established based on measured data mapping. Through the secondary development of CSI Bridge using the C# language, an implementation procedure for the digital mapping model was developed to efficiently extract and modify the parameters in CSI Bridge. Based on the modal frequencies and seismic responses, a parameter sensitivity analysis was conducted on the material properties, geometric properties, and boundary conditions of a long-span continuous rigid bridge. Using the field measured data, the relevant parameters of the initial finite element model were extracted and modified by means of the developed digital mapping model implementation procedure, resulting in a finite element model based on the measured data mapping. Then, the seismic response analysis and seismic performance evaluation were carried out on the finite element models before and after correction, respectively. The research results indicate that for a continuous rigid bridge that has been in service for certain years and is affected by material degradation and construction errors, its structural stiffness decreases compared to the design stage, and its seismic performance is generally lower than that of the initial finite element model. After the model correction, the maximum reductions in seismic bending moment and equivalent yield bending moment at critical sections of piers are 26.7% and 40.0%, respectively, and the capacity requirement ratio at the top section of main pier is below the limit value. The concrete material properties of main girder and piers, the geometric properties of main pier section, and the steel bar yield strength of pier column have the highest sensitivity. They should be prioritized during the field measurement. The research results can provide a reference for the seismic performance evaluation of in-service bridges.7 tabs, 19 figs, 32 refs.

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Last Update: 2025-12-20