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以一座在建的空腹式连续刚构桥为研究对象,采用SAP2000软件建立三维有限元模型,以桥墩的位移延性比为损伤指标,采用IDA法对结构进行地震响应分析。在结构地震易损性分析中,同时考虑了地震动和结构材料参数的不确定性,采用拉丁超立方抽样法形成地震动-桥梁结构样本对,通过大量非线性计算得到了该桥在近场、远场地震作用下的易损性曲线。同时在此基础上进行了全桥在E1和E2水准抗震性能评价。
Taking a fasting continuous rigid frame bridge under construction as the research object, a three-dimensional finite element model was established by SAP2000 software. The displacement ductility ratio of the pier was taken as the damage index, and the seismic response analysis of the structure was carried out by IDA method. In the analysis of structural seismic vulnerability, the uncertainties of seismic motion and structural material parameters are taken into account at the same time. The sample of ground motion-bridge structure is formed by the Latin hypercube sampling method. Through a large number of nonlinear calculations, , The vulnerability curve under the action of far-field earthquakes. At the same time, the evaluation of the seismic performance of the full bridge at E1 and E2 levels is carried out.