防灾减灾工程学报2017，Vol.37Issue(2)：208-214,7.DOI:10.13409/j.cnki.jdpme.2017.02.005
非规则大跨刚构-连续组合桥地震易损性分析
Seismic Vulnerability Fragility Analysis of Irregular High-pier and Long-span Rigid Frame Continuous Composite Bridge
摘要
Abstract
In order to study the seismic vulnerability of irregular long-span rigid frame continuous composite bridge under longitudinal and transverse earthquake ground motions,one certain western mountain long-span rigid frame continuous composite bridge with hollow thin-walled pier is taken as the research object.The analytical fiber model is established in light of the bridge configuration aided by OpenSees software.The incremental dynamic analysis (IDA) method is adopted to obtain the bridge structural seismic responses under 240 earthquake ground motion records,then the curvature envelopes for each pier under longitudinal and transverse earthquake ground motions are got.Moreover,the curvature and displacement are respectively regarded as the damage index of the piers and bearings to figure out the failure probabilities of different damage states,and the vulnerability curves are formed finally.The results show that the seismic vulnerability of piers are mainly influenced by the longitudinal earthquake ground motions and with the increase of the pier height,the damage probability decreases.The seismic vulnerability of the bearings is controlled by the transverse earthquake ground motions.The research results can provide references for seismic design of long-span rigid frame continuous composite bridges.关键词
刚构-连续组合桥/非规则/地震易损性/墩高Key words
rigid frame continuous composite bridge/irregular/seismic vulnerability/pier height分类
交通工程引用本文复制引用
单德山,张二华,张少雄,李乔..非规则大跨刚构-连续组合桥地震易损性分析[J].防灾减灾工程学报,2017,37(2):208-214,7.基金项目
国家重点基础研究发展计划(973计划)(2013CB036302)、四川省科技计划项目(2011JY0032)资助 （973计划）
