连体刚度对双塔连体高层建筑地震响应的影响

在对双塔连体高层建筑结构进行结构分析时，对连体的处理通常有二种简化方法：一是不考虑连体的作用而把两塔楼分立开来；二是把两塔楼楼层和连体楼层一起当作一刚性楼层。前者不能考虑到连体对结构的影响；后者显然又过高估计了连体的作用，在连体刚度不是很大时会有很大的误差。本文采用较为严密的计算模式，对主结构采用凝聚模型，把连体看作一弹性梁，可以弥补这两种简便算法的不足。应用时程分析法，就对称和非对称双塔连体结构，分析了连体刚度变化对结构动力特性和地震响应的影响，并探讨了上述两种简便算法的适用条件。

Influence of the Connection Stiffness on Seismic Response of the Double-tower Connected Tall Buildings

In the structural analysis proceeded for the double-tower connected tall buildings, there are two kinds of simplified methods in dealing with the connection substructure. One is to separate the towers and neglect the connection effect while the other is to treat the two tower floors and the connection floor as an entire floor with infinite stiffness. The former can not take the connection effect of the substructure into account, while the latter may lead to considerable error as the connection is not so stiff. In this paper the substructure was treated as an elastic beam which can aviod the shortage of the simplified methods. The history analysis was utilized to study the influence of the connection stiffness on the seismic response and the applicable premise of the simplified methods was discussed.