近场地震动作用下隔震桥梁的易损性分析

Vulnerability Analysis of Isolated Bridge Undernear-field Earthquake

首先阐述易损性曲线的建立方式及损伤指标,然后以32m跨的高铁桥梁为例,从地震动数据库(PEER)中选取10条符合条件的近场地震波。基于高阻尼橡胶支座,对隔震桥梁进行抗震性能评估然后建立桥梁墩柱和隔震支座的易损性曲线。在桥梁各构件的易损性分析结果的条件下,基于一阶界限法,建立了隔震桥梁在近场地震作用下全桥的易损性曲线,评估了隔震桥梁整体的抗震性能。

The establishment method of vulnerability curve and damage index were firstly described.Then,taking a 32-meter-span high speed railway bridge as an example,10 suitable near site seismic waves were selected from the ground motion database(PEER).Based on the high damping rubber bearing,the seismic performance of the isolated bridge was evaluated,and then the vulnerability curve of the bridge pier and the isolation bearing was established.Based on the vulnerability analysis results of each component of the bridge,the vulnerability curve of the whole bridge under near field earthquake was established based on the first order boundary method,and the seismic performance of the whole bridge was evaluated.