高层隔震结构的风振响应分析

英文篇名：Wind-induced Response Analysis of High-level Isolated Structure
中文刊名：水电能源科学
英文刊名：Water Resources and Power
作者：郑士杰 ; 刘文光 ; 何文福 ; 刘阳
英文作者：ZHENG Shijie1 LIU Wenguang2 HE Wenfu2 LIU Yang1(1.College of Civil Engineering ; Guangzhou University ; Guangzhou 510006 ; China ; 2.Department of Civil Engineering ; Shanghai University ; Shanghai 200072 ; China)
中文关键词：高层隔震结构 ; 时域分析 ; 剪力 ; 风振响应
英文关键词：high-level isolated structure ; time domain analysis ; shear force ; wind induced response
出版日期：2010-05-25
机构：广州大学土木工程学院;上海大学土木系;
年：2010
期：05
出版单位：水电能源科学

摘要

根据高层隔震结构的隔震支座和上部结构的力学特性,将结构离散化为质量集中于楼层的多质点系后,采用自回归模型模拟了作用在结构节点上的风速时程,采用时域分析法分析了在不同风速、不同屈重比时隔震结构支座的受力特性,并对比了风荷载和地震作用下上部结构的剪力反应。结果表明,隔震结构在风荷载作用下基底剪力较非隔震结构略有增大,当作用风速较大和屈重比较小时,隔震支座会产生屈服现象,其最大楼层剪力有可能超过多遇地震作用下的最大楼层剪力。
According to the mechanical properties of isolated bearing and superstructure of high-level isolated structure,a multi mass calculation model is established,which concentrates mass to floor with discrete structures.The auto-regression model is applied to simulate wind speed acting on structure node.The mechanical characteristic of isolation bearing is analyzed by time domain analysis method under the different wind speed and yield weight ratio.The shear forces of superstructure are compared under the earthquake action and wind loading.The results show that the shear force of the isolated structure is larger than that of the non-isolated structure under wind loading;the isolating bearing will yield and the maximum shear force of the superstructure under wind loading may be larger than the shear force caused by seismic action when the yield weight ratio is small and the wind speed is high.

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