东南大学学报（自然科学版）2025，Vol.55Issue(5)：1301-1310,10.DOI:10.3969/j.issn.1001-0505.2025.05.010
基于多源输入的近沿海地区典型双塔斜拉桥震-风联合作用下的风险分析
Multi-source input based risk analysis of typical twin-tower cable-stayed bridges in coastal areas under seismic-wind combined actions
摘要
Abstract
To address the risk of seismic-wind combined actions faced by bridges in the southeastern coastal ar-eas of China,a multi-source input based risk analysis method for long-span cable-stayed bridges was pro-posed.Firstly,multiple Copula functions were compared and evaluated using the Akaike information criterion(AIC)and Bayesian information criterion(BIC).The Joe Copula function was selected to construct a seismic-wind joint hazard model which can effectively capture the concurrency of extreme events.Then,fra-gility analysis under seismic-wind combined actions was conducted using SAP2000.Finally,the annual ex-ceedance probability of bridge failure was calculated by integrating disaster hazard and component fragility.Taking a 300 m twin-tower cable-stayed bridge as an example,the experimental results show that under seismic-wind combined actions,bearings are more prone to sliding and the peak deformation are significantly amplified.Especially when the peak ground acceleration(PGA)is less than 0.2g,strong wind effects can in-crease the peak bearing deformation by 106%.The failure risks of cable-stayed bridge bearings under seismic-wind combined actions are significantly higher than those under seismic-only at different destruction states,with the maximum increase of 289%.Therefore,the disaster-resistant design of bearings for cable-stayed bridges in coastal areas should fully consider seismic-wind combined actions.关键词
沿海地区/震-风联合作用/斜拉桥/易损性/风险Key words
coastal areas/seismic-wind combined actions/cable-stayed bridge/fragility/risk分类
建筑与水利引用本文复制引用
徐艳,陈敏伟..基于多源输入的近沿海地区典型双塔斜拉桥震-风联合作用下的风险分析[J].东南大学学报（自然科学版）,2025,55(5):1301-1310,10.基金项目
"十四五"国家重点研发计划资助项目(2022YFC3803000). （2022YFC3803000）
