通过1/20比例的15层和7层两相邻框架剪力墙模型结构连接粘滞阻尼器的振动台试验,比较分析了三种不同位置连接阻尼器的结构减震效果,探讨了多遇、基本、罕遇和大遇四种水准地震下结构的振动响应。结果表明,在7度多遇和基本地震下,阻尼器连接对结构地震反应有一定的控制作用,但对剪力响应的控制效果相对较差;7度罕遇地震和大震下,有阻尼连接时,主结构地震响应的控制效果较小、甚至使反应增大,大部分次结构反应不降反增;7度多遇和罕遇地震作用下,结构层间位移角最大值均满足抗震性能目标要求;阻尼器连接在次结构顶层、顶层和一层连接时减震效果较好,但主结构的部分位置(底层、高度方向的中间层、接近顶部的几层)与次结构的底层位置为薄弱位置。
Using a 15- and 7-stroyed frame-shear wall model with 1/20 measuring scale, the shaking table tests were performed to explore the vibration reactions at three positions of the structure with two viscous damper connections under 7 degree with four levels of seismic action including frequent, design, rare and large earthquakes. The results show that under the 7-degree frequent and design earthquake actions, the damper connections have certain control effects on the structural seismic reactions, while the control effects of shear force reactions are relatively bad; under the 7-degree rare and large earthquake actions, the damper connections have less control or even increase in the seismic reactions of the main structure with most increase instead of decrease in the reactions of the substructure; under the 7-degree frequent and rare earthquake actions, the maximum drift angle of the structural interlayer may meet the objective requirements of the seismic performance; the damping effects are better as the damper connections on the top of substructure or between the top and the first storey, with the weak positions at some parts (the bottom storey, the altitude directional inter- storey, the several storey near the top) of the main structure and the bottom storey of substructure.