【摘要】 总结了地震作用下高速公路钢筋混凝土桥梁主要构件的理论易损性曲线的建立方法及其基本步骤,并且应该考虑到地面运动、本地土壤条件以及桥梁本身参数等不确定性。进一步说明如何考虑桥梁主要易损构件,如桥墩、支座和桥台等对整个桥梁体系易损性的影响,并且利用概率工具从单个构件的易损性直接预计桥梁体系的易损性,表明桥梁作为一个体系,比任何一个单独的构件更易损。更多还原

【Abstract】 An analytical method and it’s procedures to obtain analytical fragility curves of the major components of reinforced concrete highway bridges under earthquake is generalized considering uncertainties of seismic ground motion,local site condition and parameters of the bridge itself.What’s more,the contribution of the major components of the bridge,such as the columns,bearings and abutments,to its overall bridge system fragility is considered and probability tools is utilized to directly estimate the bridge system fragility from the individual component fragilities.This study shows that the bridge as a system is more fragile than any one of the individual components.更多还原