摘要
地震动转动分量对隔震结构动力响应影响的研究较少。提出地震动平动-摇摆耦合作用下隔震结构的动力响应方程,选取一个5层隔震结构进行平动、摇摆和平动-摇摆耦合3种工况下的动力响应分析。结果表明,近断层脉冲型地震动的摇摆分量对隔震层位移与顶层加速度响应的影响较大;地震动平动-摇摆耦合作用相比平动分量单独作用,隔震层最大位移增幅可达37%,顶层加速度最大值的增幅可达157%。含有脉冲的近断层地震动对于隔震层位移、楼层加速度响应最大值的增大效应高于无脉冲的地震动。
There are few studies on the effect of rotational component of ground motion on the dynamic response of isolated structures. The dynamic response equation of isolation structure under translation-swing coupling of ground motion is presented. A 5-story isolation structure is selected to analyze the dynamic response of the structure under three working conditions: translational motion, swing motion and translation-swing coupling. The results show that the sway component of near-fault pulse-type ground motion has great influence on the displacement of isolation layer and the acceleration response of top layer. The maximum displacement of the isolation layer and the maximum acceleration of the top layer can increase by 37% and 157% respectively compared with that of the translational component alone. The effect of near-fault ground motion with pulse on the increase of the maximum displacement and floor acceleration response is higher than that without pulse.
作者
杜红凯
王延森
韩淼
蒋金卫
刘祥辉
Du Hong-kai;Wang Yan-sen;Han Miao;Jiang Jin-wei;Liu Xiang-hui(Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《工程抗震与加固改造》
北大核心
2022年第6期45-50,共6页
Earthquake Resistant Engineering and Retrofitting
基金
国家重点研发计划项目(2019YFC1509500)
北京建筑大学高精尖创新中心项目(UDC2019032424)。
关键词
隔震结构
摇摆分量
动力响应
隔震层位移
楼层加速度
isolation structure
swaying component
dynamic response
isolation layer displacement
floor acceleration
