【摘要】 某超限高层建筑采用钢筋混凝土框架-剪力墙结构,存在高位转换层,其楼板平面开洞尺寸过大,造成楼板平面刚度不连续。弹性分析时,楼层竖向构件最大水平位移与楼层水平位移平均值之比为1.31,属结构扭转不规则,为此结构设计采用了软钢阻尼器来提供附加刚度及阻尼。为研究该高层建筑结构抗震性能,进行了1∶20缩尺模型的振动台试验,获得了模型结构的动力特性及在地震作用下的动力反应,分析了原型结构的地震反应。试验及分析结果表明,该结构满足现行建筑抗震设计规范的抗震设防要求;阻尼器减小了结构的扭转反应,对加速度反应起到了一定的减小作用;转换层上刚度变化较大,应逐步减缓刚度变化,改善相邻楼层的延性;出屋面层的鞭梢效应严重,应重视出屋面层的抗震设计。更多还原

【Abstract】 A frame shear-wall RC structure is very complex which has high-level transfer story and large openings on the floor.The energy dissipation devices are also employed to improve its torsional behavior.To study its seismic behavior,a scaled model(1/20) was made and tested on the shaking table.In this paper,dynamic characteristics of the scaled model and its response under earthquake were investigated.Then the seismic response of prototype structure was analyzed.The test results show that the structure meets the requirements specified in the Chinese Design Code.The dampers reduce the torsional and acceleration response.The stiffness of upper transfer story should be changed slightly.The ductility of adjacent stories needs to be improved.The seismic design of the top story should be strengthened to reduce whipping effect.更多还原