东南大学学报（自然科学版）2025，Vol.55Issue(5)：1452-1459,8.DOI:10.3969/j.issn.1001-0505.2025.05.027
基于概率方法的在役悬索桥主缆剩余承载力评估
Evaluation of remaining strength of suspension bridge cables based on probabilistic approach
摘要
Abstract
Main cables are the primary load-bearing components of suspension bridges.To investigate the cor-rosion condition and service performance of suspension bridge main cables,the cable-opening inspection and remaining strength evaluation were conducted on an in-service suspension bridge based on NCHRP Web-Only Document 353.First,cable-opening inspections were performed to assess corrosion,and mechanical tests were conducted on sampled wires.Then,based on the inspection and test results,the empirical cumulative distribution function of the wire strength was established,and the tensile strength of each wire was determined based on the probabilistic approach.Finally,the remaining strengths of the main cable were calculated using two different broken wire handling methods.The results show that the stepwise reduction method can effec-tively simulate the gradual recovery of the remaining strengths at cable clamps,while the equivalent broken wire method simplifies the calculation by considering the equivalent number of broken wires.The remaining strengths of the main cables calculated by these two methods are 225.615 and 233.708 MN,with the corre-sponding strength loss rates of 24.1%and 21.4%and the safety factors of 2.30 and 2.39,respectively,indi-cating that the main cables of the suspension bridge have sufficient safety reserves.关键词
悬索桥/主缆/开缆检查/钢丝腐蚀/剩余承载力Key words
suspension bridge/main cable/cable wedging inspection/wire corrosion/remaining strength分类
建筑与水利引用本文复制引用
冯东明,赵一轩,孙智韬,史函瑀..基于概率方法的在役悬索桥主缆剩余承载力评估[J].东南大学学报（自然科学版）,2025,55(5):1452-1459,8.基金项目
国家自然科学基金资助项目(52478304) （52478304）
中国国家铁路集团有限公司科技研究开发计划资助项目(P2022G054). （P2022G054）
