李洪求¹，  程小齐¹，  刘庆江¹，  王彦博²，  胡大柱²
    （1 北京维拓时代建筑设计有限公司，北京 100025；2 同济大学，上海 200092）

[摘要] 双塔连体结构是两个高层建筑由设置在一定高度处的架空连廊相连而组成的复杂高层建筑结构。双塔连体结构塔楼刚度大，而连接体部分受力复杂。连接体部分要协调两侧塔楼结构的变形，在地震作用下的反应远比单塔结构和无连接体的多塔结构受力复杂，会出现较强的耦联震动、扭转加大等现象，其结构的抗震性能也不如单体结构，我国现行《高层建筑混凝土结构技术规程》中规定连体部位应采用更严格的抗震措施进行设计。屈曲约束支撑作为一种集结构构件和耗能构件为一体的新技术，承载力高，变形能力强，解决了普通钢支撑受压失稳的问题。探讨了连体结构中设置屈曲约束支撑后结构性能的变化，通过动力弹塑形分析方法研究了结构的抗震性能，为解决复杂连体结构提供一些技术参考。
[关键词] 复杂高层；连体结构；屈曲约束支撑；抗震性能
中图分类号：TU318    文献标识码：A  文章编号：1002-848X( 2011) Sl-0131-05

Application of buckjing restrained brace on high-rise multi-tower connected building
Li Hongqiu¹, Cheng Xiaoqi¹, Liu Qingjian¹, Wang Yanbo², Hu Dazhu²
(1 Beijing Victory Star Architectural Design Co., Ltd., Beijing 100025; 2 Tongji University, Shanghai 200092, China)

Abstract: Lateral stiffness of each tower of connected structure is relatively large. The displacement of each tower is constrained by the joint gallery in connecting region. The forced state of the joint gallery members are more complex under earthquake and the seismic behavior of connected stmcture is worse than single structure. It is also shown in Technical specification for concrete structures of tall building that connected stmctures are suitable for more rigid requirements. BucHing restrained brace (BRB) is a high efficiency lateral force-resisting member that can be used in decreasing the earthquake actions and increasing energy dissipation. Elastic-plastic analysis models with BRB and common H-brace in the joint gallery were conducted to evaluate improvement of seismic behavior.
Keywords: complex high-rise building; multi-tower connected building; buckling restrained brace; seismic behavior