基于一类桥梁样本的混凝土简支桥梁地震易损性分析方法

基于一类简支桥梁样本进行地震易损性分析，通过非线性时程分析得到构件响应，建立概率需求模型。采用定义的损伤状态函数计算构件的易损性曲线，并通过各个构件连接方式的串联假定，计算得到桥梁体系的易损性曲线。分析可知，桥台是最易损的部位，如果各个构件相互独立，体系易损性曲线与最易损构件的易损性曲线相差无几。

Analysis Methods for Seismic Fragility of Concrete Simple-supported Beams Based on Category I Bridge Samples

This paper analyzes seismic fragility based on category I simple-supported bridge samples, obtains response of members via linear time-procedure analysis and establishes probability demand model. The paper calculates fragility curves of members by means of the defined damage state function and acquires fragility curves of bridge system by calculation via assumption for series connection of all members. According to analysis, abutment is the most vulnerable part, if all members are independent each other, the fragility curve of system are almost the same as the fragility curve of the most vulnerable member.