【摘要】 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。更多还原

【Abstract】 The 3D finite element model was conducted for an open-web continuous rigid frame bridge by using the SAP2000 software.Furthermore,the uncertainty of earthquake ground motions and structure material parameters were simultaneously considered in the structural seismic fragility analysis,the earthquake-structure sample pairs were constructed by the Latin hypercube sampling method.The seismic fragility analyses were obtained for the bridge subjected to the near-field and far-field earthquake ground motions by employing the IDA(Incremental Dynamic Analysis) analysis method,respectively.Finally,the seismic performance probability evaluation for the whole bridge was performed under the E1 and E2 seismic precautionary criterion.更多还原