【摘要】 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。更多还原

【Abstract】 The seismic fragility of high-rise steel frame-concrete core-wall structures was studied in this paper.Based on the performance-based fragility analysis method,four performance level limits of seismic demand parameters were proposed according to the ultimate damage states of the structures.Considering the randomness of input ground motions,the relationship between the two seismic demand parameters and ground motion intensity indicators was obtained through nonlinear dynamic time history analysis.Combined with the specified limits of performance levels,the vulnerability analysis method was put forward,by which the seismic structural response could be assessed effectively.Seismic fragility analysis was carried out for two high-rise hybrid structures with different connection forms,and fragility curves were obtained to assess and to compare the seismic performances of the two structures.更多还原