北京财富中心超高层结构弹塑性地震反应分析  

Elastic-plastic seismic response analysis on the super high-rise structure of Beijing Fortune Plaza

作　　者：潘旦光[1] 谭晋鹏[2] 

机构地区：[1]北京科技大学土木系,北京100083 [2]中冶京诚工程技术有限公司,北京100053

出　　处：《建筑结构》2013年第S2期383-386,共4页Building Structure

基　　金：国家自然科学基金资助项目(No.51078032)

摘　　要：北京财富中心二期办公塔楼为高256.35m的框架-筒体结构。在结构中综合运用了钢管混凝土柱、钢骨混凝土连梁、钢板混凝土剪力墙等多种组合构件。为研究罕遇地震作用下结构的弹塑性反应行为,采用ANSYS/LS-DYNA软件,探讨了钢管混凝土、钢板剪力墙等构件简化计算模型,然后建立整个系统的精细有限元模型。计算结果表明:结构层间位移角均小于1/100,满足抗震要求;在强震过程中,连梁首先进入塑性,成为结构的主要耗能构件;剪力墙和框架柱局部进入塑性但没有发生破坏,结构体系显示出良好的抗震性能。The phase 2 office tower of Beijing Fortune Plaza is a frame-tube structure with 256.35m height.It utilizes composite members including concrete filled steel tube column,steel reinforced concrete binding beam and steel plate shear wall.In order to analyze the elastic-plastic response subjected to rare seismic excitations,simplified the constitutive models of these composite structures were developed.Then a refined finite element model was established by ANSYS / LS-DYNA software to assess its anti-seismic ability.Numerical results show that the maximum drift angles are all less than 1 /100 which satisfies the demand of seismic design code; binding beams are the members in which the plastic reaction arise first and become the major dissipative part; a part of shear-walls and frame-columns take on the plastic behavior,but they didn't collapse.The global system of structure shows good aseismic performance.

关 键 词：超高层结构 组合结构 地震反应 弹塑性分析 

分 类 号：TU973.212[建筑科学—结构工程]