高层建筑结构长周期地震反应的比较研究  

A Comparative Study on Long-Period Seismic Responses for High-Rise Structures

作　　者：张振炫[1] 陈清军[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2009年第4期78-84,共7页Structural Engineers

基　　金：科技部国家重点实验室基础研究资助项目(项目编号:SLDRCE08-B-03)

摘　　要：目前,对长周期地震动衰减关系和长周期反应谱的研究尚不成熟,对长周期地震动作用下高层建筑结构的地震响应研究还比较少。从地震记录库中寻找出三条比较典型的长周期地震波,对比分析了长周期地震波与普通地震波的时、频特征;在此基础上,利用有限元计算分析软件并采用时程分析法对一个高层建筑结构模型在这两类地震波作用下的地震响应进行了比较研究。结果表明,长周期地震波作用下高层建筑结构的基底剪力、位移响应值和加速度响应值均大于普通地震波作用下的结果,而且长周期的高层结构是受位移控制的。At present, the research on the attenuation relationship of long-period ground motion and the long- period response spectrum is not well developed and there are not many research projects about long-period seismic response for high-rise structures subjected to long-period ground motion. In this paper, three comparative classic long-period seismic waves were chosen from earthquake records of the world to investigate their characteristic of time domain and frequency domain, at the same time, compared them with general seismic waves and got some useful results; based on this, the paper had made a comparative study about the seismic responses of a high-rise structural model under the two types of seismic waves in the use of finite element analysis software and time-history analysis method. It was shown that the base shear force, displacement responses and acceleration responses of the model are bigger under long-period seismic waves than that under general seismic waves, and high-rise structures vcith long-perid are controlled by the displacement.

关 键 词：长周期地震动 普通地震动 高层建筑结构 时程分析 地震反应比较 

分 类 号：TU973.31[建筑科学—结构工程]