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研究地震作用下高层钢框架-混凝土核心筒结构的易损性问题。通过基于性能的静力弹塑性分析,根据结构极限损伤状态定义了混合结构地震需求参数的四个性能水平限值。考虑地震动输入的不确定性,通过弹塑性动力时程分析获得结构地震响应,建立了两个地震需求参数与地震动强度指标之间的关系,结合性能水平限值提出能有效评估结构地震响应的易损性分析方法。最后对两个不同节点连接方式的高层混合结构进行了基于性能水平限值的地震易损性分析,绘制结构的地震易损性曲线,对结构抗震性能进行评估和对比分析。
Study on the vulnerability of high-rise steel frame-concrete core tube structure under earthquake action. Based on the performance-based static elasto-plastic analysis, four performance level limits of seismic demand parameters for hybrid structures are defined according to the structural damage states. Considering the uncertainty of ground motion input, the seismic response of the structure is obtained by elasto-plastic dynamic time-history analysis. The relationship between the two seismic demand parameters and ground motion strength indices is established. Combining the performance level limits, Vulnerability analysis method. Finally, the seismic vulnerability analysis of high-rise mixed structures with two different node connections based on the performance level limit is carried out. The seismic vulnerability curve of the structure is drawn and the seismic performance of the structure is evaluated and compared.