框架-核心筒高层混合结构抗震性能评价及破坏模式分析  

Seismic performances and failure mode analysis of hybrid frame-core tube structures

作　　者：缪志伟[1] 叶列平[1] 吴耀辉[2] 马千里[1] 娄宇[2] 陆新征[1] 

机构地区：[1]清华大学土木工程系,清华大学结构工程与振动教育部重点实验室,北京100084 [2]中国电子工程设计院,北京100840

出　　处：《建筑结构》2009年第4期1-6,共6页Building Structure

基　　金：国家十一五科技支撑计划(2006BAJ03A02)

摘　　要：以一个实际高层框架-多子筒核心筒混合结构为例,通过静力弹塑性计算和弹塑性动力时程计算,分析了在地震作用下框架-核心筒结构体系的受力特点,讨论了该结构体系的合理破坏模式,提出将控制概念引入结构设计中,有目的地引导作为主要抗侧力体系的核心筒的屈服机制和破坏模式,同时对外框架进行合理的设计使其具有足够的承载力和延性,可以使框架-核心筒结构具备多道抗震防线,提高其抗震性能。结果表明:经过合理设计,框架-核心筒结构可以具备三道抗震防线:连梁、子筒(或墙肢)、框架,并且结构同时具有足够的耗能能力,能形成合理的破坏模式,提高抗震性能。A practical frame-core tube hybrid structure is analyzed with Pushover method and dynamic time-history analysis respectively as an example. The seismic behaviors are analyzed and the rational failure mode of frame-core tube structure system is discussed. And it is proposed that by controlling the yielding mechanism and failure mode of the core tube based on the idea of the capacity design method and making sure the outer frame has sufficient loading carrying capacity and ductility at the same time, the seismic performance of the frame-core tube structure will be improved and multiple seismic fortification lines can be established. The analytical results show that the reasonably designed frame-core tube structure can form effective dual seismic resistant system which has three seismic fortification lines： coupling beams, sub-tubes and outer frame. Besides, the structure system has adequate energy dissipation ability and can achieve the rational failure mode.

关 键 词：框架-核心筒结构 破坏模式 抗震性能 抗震防线 

分 类 号：TU473.12[建筑科学—结构工程] TU457[建筑科学—土工工程]