不同截面吊脚柱RC框架结构振动台试验研究  

Shaking table test of a RC frame structure with different cross-section columns of stilted floor

作　　者：唐洋洋 李英民[1,2] 刘立平[1,2] 姜宝龙[1] 余洪翔 姬淑艳[3] TANG Yangyang;LI Yingmin;LIU Liping;JIANG Baolong;YU Hongxiang;JI Shuyan(School of Civil Engineering,Chongqing University,Chongqing 400045,China;MOE Key Lab of New Techniques for Construction of Cities in Mountain Area,Chongqing University,Chongqing 400045,China;School of Management Science and Real Estate,Chongqing University,Chongqing 400045,Chin)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]重庆大学管理科学与房地产学院,重庆400045

出　　处：《振动与冲击》2023年第1期19-27,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51638002,51878101)。

摘　　要：为研究山地吊脚RC框架结构的地震响应特征和抗震性能,设计并制作了一个1∶8缩尺的吊脚RC框架模型。通过振动台试验,对结构模型的破坏现象、动力特性、加速度反应、变形特征、楼层剪力和扭转效应进行了分析。结果表明:吊脚RC框架结构的吊脚层和第2层破坏明显不均匀,吊脚层破坏轻微,且坡顶短柱破坏较早,第2层柱底破坏严重,且破坏程度自坡底柱侧向坡顶柱侧递减,结构破坏主要位于吊脚层以上,最终表现为部分柱铰屈服破坏;激励水平大于罕遇地震时,吊脚层的加速度放大系数大于上部结构,楼层剪力的增大程度相对上部结构也更加显著,吊脚层变形不大,结构的最大层间位移角始终在3~4层;结构的最大层间扭转角随地震强度增加自第2层转移至吊脚层。In order to study seismic response characteristics and aseismic performance of the stilted RC frame structure on a slope,a 1∶8 scale stilted RC frame model was designed and manufactured.Through the shaking table test,failure phenomena,dynamic characteristics,acceleration response,deformation characteristics,floor shear force and torsion effect of the structural model were analyzed.The results showed that damages of stilted floor and the second floor of stilted RC frame structure are obviously uneven,damage of stilted floor is slight,and short column at slope top is damaged earlier,bottom damage of the second floor is serious,and damage degree decreases from side of slope bottom column to side of slope top column;structural damage is mainly located above stilted floor,and finally some column hinges have yield failure;when excitation level is larger than rare earthquake,acceleration amplification coefficient of stilted floor is larger than that of upper structure,and increase in floor shear force is more significant than that of upper structure;deformation of stilted floor is not large,and the maximum inter-story displacement angle of structure is always at 3-4 floors;the maximum inter-story torsion angle of structure is transferred from the second floor to stilted floor with increase in earthquake intensity.

关 键 词：山地建筑结构 吊脚RC框架结构 振动台试验 地震响应 

分 类 号：TU317.1[建筑科学—结构工程]