【摘要】 本文以一榀7层的钢筋混凝土框架结构为分析对象,采用SAP2000建立有限元模型,选取非线性Nlink单元来模拟梁和柱两端的塑性角,其中柱铰单元采用纤维PMM铰,梁铰单元设置弯矩铰。分别指定最大层间位移角和最大顶点位移角作为结构地震需求参数,并定义了相应的破坏状态。输入8条地震动记录进行结构地震易损性分析,得到了相应的易损性曲线。该方法可为结构的抗震性能评价提供参考。更多还原

【Abstract】 A seven-story RC frame structure is selected as an example,the corresponding finite element model is established by SAP2000,and the nonlinear Nlink element is adopted to simulate the plastic hinges located in ends of beams and columns,fiber PMM hinge and bending moment hinge are defined as column plastic hinge and beam plastic hinge,respectively. Then the maximum inter-story displacement angle( ISDA) and maximum roof displacement angle( RDA) are selected as structural seismic demand parameters,and the corresponding damage states are defined. Furthermore,the seismic fragility analysis is conducted when the RC frame structure is subjected to eight earthquake ground motions,and the corresponding structural fragility curves are obtained. This method will provide a reference for future structural seismic performance evaluations.更多还原