竖向地震作用下双塔连体结构非线性时程分析  

Research on nonlinear time-history response of a multi-tower connected structure subjected to vertical earthquake motion

作　　者：韦晓栋[1] 吴晓涵[1] 钱江[1] 吕西林[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《建筑结构》2012年第6期121-126,共6页Building Structure

基　　金：国家自然科学基金项目(90815029);国家重点基础研究发展计划973项目(2007CB714202)

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。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.

关 键 词：双塔连体结构 竖向地震 时程分析 抗震性能 

分 类 号：TU973.14[建筑科学—结构工程] TU311.41