大底盘双塔层间隔震结构加速度响应研究  

ACCELERATION RESPONSE OF DOUBLE TOWER STORY ISOLATION STRUCTURES WITH THE LARGE CHASSIS

作　　者：崔俊伟 CUI Junwei(China IPPR International Engineering Co.,Ltd.,Beijing 100089,China)

机构地区：[1]中国中元国际工程有限公司,北京100089

出　　处：《低温建筑技术》2022年第5期78-81,共4页Low Temperature Architecture Technology

摘　　要：为探究大底盘双塔结构在地震下的动力响应,考虑支座非线性及主体结构非线性,运用ETABS软件进行该类结构体系弹塑性时程分析,研究了隔震层刚度对上部结构和下部结构加速度规律的影响。结果表明与非隔震结构相比,上部结构的加速度大幅度减小,大底盘的加速度减震率由小震到大震逐级减小,在大震下甚至出现底盘加速度大于非隔震结构的现象;隔震层的刚度对于上部结构和大底盘的加速度影响不尽相同,适当增大隔震层刚度,上部结构的加速度变大,而下部结构的加速度可减小,可为同类工程设计提供参考。To investigate the dynamic response of large chassis double tower structure under the earthquake,the elastic-plastic time history analysis of the structural system is carried out by using ETABS software considering the nonlinearity of support and main structure.The influence of isolation layer stiffness on the acceleration law of super⁃structure and substructure is studied.Compared with the non-isolated structure,the acceleration of the superstruc⁃ture decreases greatly,and the acceleration damping rate of the large chassis decreases step by step from the small earthquake to the large earthquake;the chassis acceleration is greater than that of the non-isolated structure under large earthquake.The stiffness of the isolation layer has different effects on the acceleration of the superstructure and the large chassis.Appropriately increasing the stiffness of the isolation layer would increase the acceleration of the superstructure and reduce the acceleration of the substructure,which can provide a reference for the design of similar projects.

关 键 词：大底盘多塔结构 层间隔震 加速度控制 隔震结构刚度比 

分 类 号：TU352.1[建筑科学—结构工程]