地震动平动与转动分量耦合作用对隔震结构动力响应的影响  

The influence of coupling effect of translational and rotational components of ground motion on dynamic responses of isolated structures

作　　者：韩淼[1] 贾玉玺 杜红凯[1] 王延森 杨杰川 Han Miao;Jia Yu-xi;Du Hong-kai;Wang Yan-sen;Yang Jie-chuan(Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学,北京100044

出　　处：《工程抗震与加固改造》2024年第4期102-110,共9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)。

摘　　要：为分析地震动摇摆和扭转分量对隔震结构的动力响应影响,建立5层隔震钢框架结构模型,对比有限元分析结果与振动台试验实测数据,验证建模分析的精度。将地震动平动分量、平动分量耦合转动分量输入,分析隔震结构动力响应。结果表明:有、无速度脉冲的地震动平扭耦合与平摆耦合作用,均大于平动地震动单独作用的隔震结构动力响应;有速度脉冲的地震动平动耦合转动分量对隔震结构动力响应的影响,高于无速度脉冲的地震动平动耦合转动分量;平扭耦合作用的隔震层位移响应增幅大于平摆耦合作用。To analyze the influence of earthquake shaking and torsional components on dynamic responses of isolated structures,a 5-story model of an isolated steel frame structure was established.The finite element analysis results were compared with the measured data from a shaking table test to verify the accuracy of the modeling analysis.The translational components and translational-rotational coupling components of ground motions were inputted into the model to analyze the dynamic responses of the isolated structure.The results show that the dynamic responses of the isolated structure under ground motions with and without velocity pulses in translational and torsional coupling were higher than those of the isolated structure with only translational ground motion.The effects of rotational components of ground motion with velocity pulses on the dynamic responses of the isolated structure were higher than those without velocity pulses.The amplification of isolation layer displacement response for the base-isolated structure under torsional coupling was greater than that under swinging coupling.

关 键 词：隔震结构 转动分量 耦合作用 动力响应 

分 类 号：TU352.12[建筑科学—结构工程]