地震作用下钢筋混凝土桥梁结构易损性分析

针对缺乏桥梁结构地震破坏数据的地区 ,考虑地震地面运动、局部工程场地条件和桥梁本身参数的不确定性 ,给出了一种地震作用下钢筋混凝土结构易损性曲线的系统性分析方法 ,对美国中东部受NewMadrid地震带影响的高速公路系统混凝土连续桥梁结构易损性进行分析 ,并给出了桥梁结构的易损性曲线 ,表明本文方法对该类地区桥梁结构的易损性分析具有适用性。

SEISMIC FRAGILITY ANALYSIS OF REINFORCED CONCRETE BRIDGES

Aiming at the areas which are lack of seismic destructional data of bridges,an analytical method to obtain fragility curve of concrete bridges under earthquake is developed considering uncertainties of seismic ground motion,local site condition and parameters of the bridge itself.Meanwhile,seismic fragility of a continuous concrete bridge of the highway systems in the eastern United States,which is affected by the New Madrid seismic zone,is analyzed by the given method and the fragility curve of the bridge is obtained.It is recommended that the method could be applicable to fragility analysis of bridges for seismic attack in this area.