地震作用下连体高层结构的扭转效应分析  

Torsional Effect of Connected High-Rise Structure Under Earthquake Excitation

作　　者：林剑 

机构地区：[1]福建泛亚建设设计有限公司,福州福建350001

出　　处：《青岛大学学报（工程技术版）》2014年第2期105-109,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金项目(51108089);福建省自然科学基金基金项目(2011J05128);高等学校博士学科专项科研基金项目(20113514120005)

摘　　要：为解决连体高层结构在地震中引起的连廊垮塌失效问题,本文选取某大跨度连体结构为原型结构,并从连体结构与主体结构的相对刚度、连体结构的高度和连体结构的跨度等因素,分析地震作用对扭转效应的影响程度。同时,利用MIDAS GEN大型通用分析软件,建立了一系列基准化模型,并对选取的3种结构模型的前10阶周期进行比较分析。分析结果表明,连体结构的扭转效应将随着连体与主体相对刚度增大、连体设计高度的降低以及跨度的减小而有不同程度的增大,而且扭转效应也会有所放大。该研究为今后该类结构的抗震设计提供了必要的理论参考。In order to solve the problem that corridor of high-rise connected structure can easily collapse during earthquake,this paper takes a long-span high-rise connected structure from real project,The changing influence of the torsional effect for such structure under earthquake excitation is examined with different relative stiffness between main tower and corridor,connected height and span of corridor considered.Meanwhile,MIDAS is used to build a series of typical models.Simulations are performed and the first 10natural frequencies of the 3selected models are compared.The simulation results show that,the torsional effect may increase with larger relative stiffness,lower connected height and larger span.And these results also provide necessary theoretical reference for future aseismatic design of such kind of structure.

关 键 词：连体高层结构 扭转效应 相对刚度 扭转振型质量参与系数 高阶振型 

分 类 号：TU973.31[建筑科学—结构工程]