土木与环境工程学报（中英文）2024，Vol.46Issue(3)：161-170,10.DOI:10.11835/j.issn.2096-6717.2022.041
大跨度桥梁钢桥面板跨尺度疲劳损伤评估方法
Multiscale fatigue damage assessment method for orthotropic steel deck of long-span bridges
摘要
Abstract
Orthotropic steel deck(OSD)in a long-span cable-stayed bridge is vulnerable to fatigue damage at the rib-to-deck(RD)joints due to traffic vehicle load.An algorithm for fatigue damage evaluation simulation of long-span bridge based on mesoscale damage model is presented in this paper.Firstly,the fatigue damage evolution model of steel deck based on microscopic damage mechanics is derived.Combined with the measured traffic data,the random traffic flow simulation is realized based on Monte-Carlo method.Finally,it is applied to estimate the damage accumulation of a multi-span cable-stayed bridge.The results indicate that the fatigue damage accumulation at the rib-to-deck(RD)joints is greater than other areas of the OSD.The cumulative rate of fatigue damage at the rib-to-deck(RD)joints shows a strong nonlinear trend.The results are also compared with those estimated by the linear Miner,s model.The predicted fatigue life is far less than that by the linear Miner,s model.关键词
大跨度桥梁/钢桥面板/细观疲劳/损伤演化/随机车流/损伤预测Key words
large multi-span bridge/steel deck/mesoscale fatigue/damage evolution/stochastic traffic flow/fatigue prediction分类
交通工程引用本文复制引用
张宁,余凯,崔闯,张清华..大跨度桥梁钢桥面板跨尺度疲劳损伤评估方法[J].土木与环境工程学报（中英文）,2024,46(3):161-170,10.基金项目
国家自然科学基金(52108176、51878561、51978579、51778533、51578455) （52108176、51878561、51978579、51778533、51578455）
广东省重点领域研发计划项目(2019B111106002) （2019B111106002）
桥梁结构健康与安全国家重点实验室开放课题(BHSKL19-06-KF) （BHSKL19-06-KF）
四川省科技计划项目(2021YJ0037) National Natural Science Foundation of China(Nos.52108176,51878561,51978579,51778533,51578455) （2021YJ0037）
Research and Development Projects in Key Areas of Guangdong Province(No.2019B111106002) （No.2019B111106002）
The Open Key Fund Sponsored Program of State Key Laboratory for Bridge Health and Safety(No.BHSKL19-06-KF) （No.BHSKL19-06-KF）
Sichuan Science and Technology Program(No.2021YJ0037) （No.2021YJ0037）
