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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。
Due to the complex deformation and internal force distribution of the double-column structure connected by the earthquake, the Siamese structure provided in the structure will enhance the vertical seismic effect on the structure to a certain extent. For a top twin-tower structure, the overall nonlinear analysis model of the structure is established by NosaCAD finite element software. The dynamic time-history analysis of two different conditions of inputting horizontal and vertical seismic waves and inputting only horizontal seismic wave into the calculation model is carried out. By comparing the dynamic responses of the two structures, Impact of earthquake response. The analysis shows that the vertical seismic effect has no effect on the horizontal displacement of the structure and has some influence on the vertical displacement of the structure, but the influence is small. The vertical seismic effect has some influence on the internal force of the mid-span member.