Lifecycle fatigue damage assessment of Existing bridges considering maintenance schemes
Bridges are always serving as the crucial nodes in the transportation networks to span over water bodies or roads.Continuous corrosion on bridges as well as the dynamic stress cycles from operational or extreme environmental loads,such as those from vehicles or wind,storm surge,waves,have increased safety concern from stakeholders,researchers and general public on the deteriorated bridges.To increase the bridge resilience in its lifecycle,many strategies were applied during the initial design stage(e.g.using weathering steel instead of carbon steel)or the operational stage with many maintenance or rehabilitation methods(e.g.implementation of protective paint).In the present study,a rational reliability-based fatigue damage assessment scheme is proposed to evaluate the bridges safety over its lifecycle with applied maintenance schemes.Based on the coupled vehicle-bridge dynamic system,structural fatigue damage is obtained and evaluated with different future maintenance schemes.Parametric studies are carried out to investigate the effects of steel types,corrosion parameters,corrosion levels,protective coating on steel surfaces,corrosion initiation time,periodic maintenance schemes and maintenance intervals.The results of this study could help enable quantification of the effects of maintenance schemes to link with structural fatigue reliability.
Deteriorated bridges failure probability corrosion-fatigue maintenance schemes
J.Zhu M.X.Wu W.Zhang
Ph.D.Candidate,Dept.of Civil & Environmental Engineering,University of Connecticut,Storrs,United Sta Lecturer,Dept.of Civil Engineering & Architecture,Southwest Petroleum University,Chengdu,China Assistant Professor,Dept.of Civil & Environmental Engineering,University of Connecticut,Storrs,Unite
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2087-2097
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）