北京财富中心超高层结构弹塑性地震反应分析*
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(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）[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。[关键词] 超高层结构;组合结构;地震反应;弹塑性分析中图分类号：TU973+.212 文献标识码： A 文章编号：1002-848X(2013)S2-0383-04Elastic-plastic seismic response analysis on the super high-rise structure of Beijing fortune plazaPan Danguang1, Tan Jinpeng2(1 Department of Civil Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2 Capital Engineer & Research Incorporation Limited, Beijing 100053, China)Abstract：The phase 2 office tower of Beijing fortune plaza is a frame-tube structure with 256.35 m 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, we developed the simplified the constitutive model of these composite structures. 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.Keywords: super high-rise structure; composite structures; seismic response; elastic-plastic analysis
