考虑场地条件的高层建筑长周期地震反应特征分析  

Seismic Response Analysis of Long Period High-rise Building under Soft Interlayer

作　　者：杨笑梅[1] 陈宇庭 

机构地区：[1]广东工业大学土木与交通工程学院,广东广州510006

出　　处：《工程抗震与加固改造》2016年第6期18-23,31,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家科技支撑计划项目(2015BAK17B01);国家自然科学基金(51178123);广东省科技计划项目(2013B020200014)

摘　　要：长周期地震动与长周期结构的地震反应是近年工程中研究的热点。本文首先选取了一个典型的含有软弱夹层的II类场地模型,分别输入普通与长周期的基岩记录,计算场地表面地震动及反应谱,并与标准Ⅱ类场地反应谱进行了对比,研究这类场地条件对长周期地震动的影响。再以某一典型长周期高层框架-核心筒结构为背景,分别以这三种地震动作为结构输入,采用SAP2000有限元分析软件,进行结构地震反应分析。研究结果表明:软弱夹层场地减弱了输入的普通地震波加速度峰值,但对其作用下的长周期建筑结构存在不利影响;此外,软弱夹层场地放大了长周期地震动的长周期成分,与上部结构发生共振,使得上部结构的地震反应剧烈。The research of the seismic response of long period ground motion and long period structure is a hot spot in recent engineering research. In this thesis,a typical II site model containing weak interlayer is selected,the conventional and long cycle of bedrock records are input,respectively,then the site surface ground motion and response spectrum are calculated,and compared with the response spectrum of the standard II site to study the impact of such kind of site conditions on the long period ground motion. Next,adopting the three kinds of seismic wave as input,the structural seismic response of a typical tall frame-core tube structure are analyzed by finite element analysis software SAP2000. The results of the study show that： weak interlayer site weakens the peak acceleration of the input general seismic wave,but it has adverse effect on the long- term structure under its action. In addition,the weak interlayer site enlarges long period ingredient of the long-period ground motions,and resonates with the upper structure,making the seismic response of the superstructure violent.

关 键 词：软弱夹层 长周期地震波 长周期建筑结构 地震反应 

分 类 号：TU973.17[建筑科学—结构工程] TU973.31