摘要
设计北京地区某五层钢框架层间隔震结构,以及1∶8缩尺层间隔震振动台试验模型,建立有限元分析模型对隔震层在不同层位置和不同近断层地震动输入下的动力响应进行分析。结果表明:随着隔震层位置上移,原型结构和缩尺模型第一自振周期减小,隔震层位移减小,最大层间剪力和顶层加速度增大,输入能量减小但顶层隔震时有所增大,原型结构和缩尺模型动力响应符合相似关系;隔震层在不同层位置时,不同近断层地震动对隔震结构的动力响应影响不同。
A 5-story story isolation steel frame structure in Beijing and it＇s 1：8 scaled story isolation shaking table testing model are designed. The finite element analysis models of the prototype and the scaled model are established to analyze the dynamic response of the structure with different isolations and different input near-fault ground motions. The research indicates that, with the lifting of isolation layer, the natural period of the prototype and the scaled model shorten, the isolation layer displacement decreases, the maximum upper shear force and top-story acceleration increase, the input energy decreases but increases when the isolation layer lifts to layer 4, and the dynamic response ratio between the prototype and the scaled model resembles the similitude law. Under the different isolation layer, the effects of near-fault ground motions on the scaled models are different.
出处
《建筑科学》
CSCD
北大核心
2017年第3期100-106,共7页
Building Science
关键词
层间隔震
近断层地震
动力响应
相似关系
story isolation structure
near-fauh ground motion
dynamic response
similitude law
