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中文摘要：
地震作用下双塔连体结构体系的变形和内力分布较为复杂,结构中设置的连体部分在一定程度上会提高竖向地震作用对结构的影响。针对某一顶部连体双塔结构,采用NosaCAD有限元软件建立结构的整体非线性分析模型。对计算模型进行输入水平向、竖直向地震波和只输入水平向地震波两种不同工况的动力时程分析,通过对比两种工况下结构的动力响应,研究竖向地震对该连体结构地震反应的影响。分析表明：竖向地震作用对结构的水平位移基本没有影响,对结构竖向位移有一定影响,但影响较小;竖向地震作用对连体部分跨中杆件的内力有一定影响。
英文摘要：
The deformations and the internal forces of the multi-tower connected structure （MTCS） under earthquake are very complicated. The effect of vertical seismic motion to the MTCS will be magnified in a certain extent for the connecting structure. The model of a MTCS was established by NosaCAD, which mainly composed of the nonlinear elements. The analysis of the structure model was carried out in two cases of seismic wave input, one with both horizontal and vertical wave inputs and the other with horizontal input only. By comparing the results of the structure response under two cases, the effect of vertical seismic motion to the MTCS was investigated. The results show that the vertical seismic has no effect on the horizontal displacement of the structure and little effect on the vertical displacement of the structure. The vertical seismic has some influence on the internal forces in the middle of the connecting structure.
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