Probabilistic Damage-Based Seismic Demands Analysis of Reinforced Concrete Bridge
Due to Wenchuan earthquake, many bridges have been damaged severely. Most of them are needed to be retrofitted or rebuilt The revised damage index is proposed which is associated closely with the residual seismic capacity. To make retrofit decision for many damage bridges, multi-criteria comprehensive damage evaluation system is modified with considering economic-social facts and the engineering circumstances in the affected regions of Wenchuan earthquake. Based on three springs model, the hysteretic model coupled strength and stiffness deterioration with damage energy is refined. Chosen PGA as 1M, the attenuation relationship between revised damage index and PGA can be regressed with nonlinear time-history analysis results by IDA. Combined probabilistic capacity analysis, probabilistic capacity analysis with probabilistic hazard analysis, the seismic risk assessment was built on the fragility curves. With the risk assessment, the reasonable retrofitting decision for severe damage bridges in Wenchuan earthquake was made.
Damage indez Multi-criteria comprehensive damage evaluation system IDA Seismic risk
Qiwu Fan Yongjiu Qian Yuanjiu Chen
Southwest Jiaotong University, school of civil engineering Chengdu, China
国际会议
The First Anniversary of Wenchuan Earthquake(纪念汶川地震一周年国际学术会议)
成都
英文
464-469
2009-05-10（万方平台首次上网日期，不代表论文的发表时间）