转动地震动作用对结构动力响应影响分析  

Analysis of the influence of rotational ground motion on the dynamic response of the structure

作　　者：韩淼[1] 刘永波 杜红凯[1] 孙猛 王延森 HAN Miao;LIU Yong-bo;DU Hong-kai;SUN Meng;WANG Yan-sen(Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学北京未来城市设计高精尖创新中心,北京100044

出　　处：《振动工程学报》2023年第2期419-426,共8页Journal of Vibration Engineering

基　　金：国家“十三五”重点研发计划项目(2019YFC1509500)。

摘　　要：转动地震动作用对结构响应的影响有待深入研究。建立钢筋混凝土框架结构模型,对地震动平动分量和转动分量单独及耦合作用下的结构动力响应进行分析,结果表明:地震动转动分量与平动分量耦合作用时,会增大结构响应;结构顶层位移、层间扭转角、结构的扭转效应都显著增大;含有速度脉冲比无速度脉冲的转动分量与平动分量耦合作用对结构响应影响大;地震动转动分量的施加方向对结构动力响应有影响;在有速度脉冲的地震波作用下,转动分量单独作用也可使结构进入弹塑性状态。The influence of rotational ground motion on structural response needs further study.A reinforced concrete frame struc⁃ture model is established to analyze the dynamic response of the translational and rotational components of the ground motion inde⁃pendently and coupledly.When the rotational and translational components of ground motion are coupled,the structural response will be increased.The displacement of the top layer of the structure is significantly increased.The torsion angle between layers is significantly increased,and the torsional effect of the structure is significantly amplified.The coupling effect of rotational and trans⁃lational components with velocity pulse is more important than that without velocity pulse.The application direction of the rotation⁃al component of ground motion has an influence on the dynamic response of the structure.Under the action of velocity pulse seismic wave,the rotation component alone can make the structure into elastic-plastic.

关 键 词：地震动 转动分量 耦合作用 动力响应 速度脉冲 

分 类 号：TU311.3[建筑科学—结构工程] TU435