【摘要】 某钢管混凝土框架-混凝土核心筒混合结构为超限高层结构,设计中采用了性能化设计思想,对不同类别构件进行了不同设防水准的分析及验算。为了评估结构在大震下的抗震性能,探讨当前设计方法与抗震性能目标间的对应关系,利用CANNY09对此结构进行了整体弹塑性分析,对设计结果进行了校核。结果表明,目前所采用的中震或大震设计方法能有效增加结构的抗震可靠性,但是尚存在不同类别构件设计结果与设防目标不协调的问题,主要原因包括弹性阶段位移指标的选取、不同烈度水平下分析模型的适用性以及静力与动力分析的差别等,对这些原因进行了讨论并给出了处理建议,可供相关设计参考。更多还原

【Abstract】 A concrete-filled steel tube frame-concrete corewall hybrid structure belongs to code-exceeding tall structure.Performance-based seismic design method is adopted and different seismic fortification levels are adopted for different types of members.In order to assess seismic performance of this structure under level 3 EA(Earthquake Action) and discuss the relationship between design method and performance objects,overall elasto-plastic analysis is conducted by use of CANNY09.As a result,design method based level 2 or 3 EA can effectively reinforce the seismic reliability.However,design results and fortification objects are not harmonious.Drift index in elastic stage,analysis model under different earthquake intensity,difference between static and dynamic analysis are main reasons.These aspects are discussed and corresponding suggestions for reference are given.更多还原