大底盘双塔连体高层结构的地震响应分析

Seismic Response Analysis of High Rise Building Structure with Large Chassis in Twin Towers

复杂高层建筑结构体系是随着经济增长而发展起来的一种结构体系,这种结构体系能满足较高的空间利用率,其中较为特殊的是一种底部带有大底盘、上部是塔楼的的结构形式。为了对此类结构形式进行更好的研究,对大底盘双塔结构和大底盘双塔连体高层的结构进行地震响应分析,利用有限元模型sap2000建立大底盘双塔结构模型和大底盘双塔连体结构模型,对上述模型分别进行模态分析和线性时程分析,得出二者之间的周期、质量参与系数和顶层位移的数据,进行对比分析。结果表明,在一定情况下,连接体对大底盘双塔高层结构有影响作用,对于高阶振型而言其平动和扭转的耦合作用有所加强,使扭转振型更加明显;用不同的地震波激励结构模型,对结构的极限状态也有影响;对于大底盘双塔连体结构,在一定条件下如何输入地震波对大底盘双塔连体结构的地震响应影响不大。

Complex high-rise building structure system is a kind of structure system which has been developed with economic growth and the structure meets the high space utilization rate. The more special structure is a bottom with large chassis while the upper part is a tower. In order to research this kind of structure better,seismic response analysis of big chassis structure of the double tower and double tower connected high-rise structure are taken. Twin tower structure model and double tower connected structure model are established by using the SAP2000 finite element model. The modal analysis and linear history analysis of the structure model are taken respectively,and their cycles,mass participation Coefficients and the top displacement datas are compared and analyzed. The results show that under certain circumstances,connect body has an impact on large chassis twin tower high-rise structure. For higher order modes,its translation and torsional coupling effects are strengthened which make torsional vibration mode is more obvious; different earthquake wave excitations have an impact on the structure limit state of the model structure; for large chassis Twin Towers connected structure,under certain conditions,how to input seismic wave on the double tower connected structure seismic response has little effect.