郑州大学学报（工学版）2024，Vol.45Issue(3)：14-21,37,9.DOI:10.13705/j.issn.1671-6833.2023.06.008
基于准静态应变影响线的拱桥吊杆损伤识别及评估
Identification and Assessment of Damage to Arch Bridge Booms Based on Quasi-static Strain Impact Lines
摘要
Abstract
In order to solve the problem of accurate identification of arch bridge boom damage,in this study a sim-plified mechanical model of an under-bearing tied arch bridge was established and the analytic formula of boom strain influence line of under-bearing tied arch bridge was obtained by force method derivation.Based on that,the damage identification method boom was proposed based on quasi-static strain influence line index of under-bearing tied arch bridge.Then the applicability of the method for conventional boom number arch bridge was verified with the help of finite element method.And the influence of test noise,damage location,damage degree,and damage category on the damage assessment results was studied by using finite element model calculations.A scientific im-plementation plan for vehicle loading was proposed.The results showed that within 10%test noise,the quasi-static strain-influence line difference curvature method could accurately locate the local damage location of arch bridge booms and quantitatively assess their damage degree.The method still had a good recognition effect when other structures,such as tie beams,wind braces,and arch ribs,were damaged.关键词
桥梁工程/下承式系杆拱桥/应变影响线差值曲率/吊杆/损伤评估Key words
bridge engineering/down-bearing tied arch bridge/strain-influenced line difference curvature/booms/damage assessment分类
交通工程引用本文复制引用
郑元勋,范聪聪,王博立,王长柱,郭攀..基于准静态应变影响线的拱桥吊杆损伤识别及评估[J].郑州大学学报（工学版）,2024,45(3):14-21,37,9.基金项目
国家自然科学基金联合基金资助项目(U2040224) （U2040224）
国家自然科学基金资助项目(51878623,52279144) （51878623,52279144）
