考虑SSI的钢管混凝土框架结构易损性分析

Structural Vulnerability Analysis of CFST Frame with Considering SSI

为了深入研究土-结构相互作用(SSI)对钢管混凝土框架抗震易损性能的影响,采用弹簧-阻尼单元模拟地基土,建立了考虑SSI与刚接情况下4层钢管混凝土框架结构体系有限元分析模型,进行了模态分析、地震响应与地震易损性分析。建立了不同结构体系在不同场地、不同强度等级地震作用下的结构损伤变形与损伤超越概率的关系曲线。

In order to research the effects of soil-structure interaction（SSI） on structural vulnerability analysis for concrete-filled steel tubular（CFST） frame,two finite element models,where the spring-damping unit is used to simulate the soil,are built to simulate a four-story CFST frame with rigid connections and with considering SSI.The modal analysis,seismic response and earthquake vulnerability analysis are conducted.The relationship curves of structural damage deformation and damage excess probability are obtained for different structural systems,sites and earthquake waves.