河南城建学院学报2023，Vol.32Issue(6)：38-44,7.DOI:10.14140/j.cnki.hncjxb.2023.06.006
基于挠度及应变影响线差值曲率的连续箱梁桥损伤识别方法
Damage identification of continuous box girder bridges based on the curvature difference of deflection and strain influence lines
摘要
Abstract
During the service life of a bridge,it may suffer from varying degrees of damage due to material per-formance degradation and external environmental factors.In order to ensure the continuous safety and normal operation of the bridge,it is important to conduct damage identification research on existing bridges.This paper proposes a damage identification method based on the curvature of the difference between deflection and strain influence lines of a continuous box girder bridge before and after damage at a certain location.The feasibility of this method is verified using a finite element model of a three-span continuous box girder bridge with equal sections.The results show that this method can effectively identify the damage location and extent of a continu-ous box girder bridge with equal sections under single-point and multi-point damage conditions.关键词
损伤识别/影响线/差值曲率/连续箱梁桥Key words
damage identification/influence line/continuous box girder bridge分类
交通工程引用本文复制引用
孙文卓,石英迪..基于挠度及应变影响线差值曲率的连续箱梁桥损伤识别方法[J].河南城建学院学报,2023,32(6):38-44,7.基金项目
建筑健康监测与灾害预防国家与地方联合工程实验室开放课题(GG22KF002) （GG22KF002）
