核心筒部分悬挂结构振动台试验及分析

提出核心筒部分悬挂结构体系,该体系将框架-核心筒结构有多道抗震防线的优势与核心筒悬挂结构减震性能好的优势相结合:在地震反应相对较小的底部采用框架-核心筒结构,在地震反应相对较大的上部采用核心筒悬挂结构,并采取在悬吊结构楼板与核心筒之间设置阻尼器和设置素混凝土连接键的构造措施,实现对结构地震反应的有效控制。进行了一个8层1:10比例的核心筒部分悬挂结构模型的模拟地震振动台试验研究,分析了结构在弹性阶段、弹塑性阶段的动力特性以及该结构在不同峰值加速度的El Centro地震波作用下的地震反应,建立结构分析模型,用SAP2000程序对该结构进行了弹性和弹塑性时程地震反应分析,计算结果与试验结果吻合较好。试验及分析表明,该结构具有良好的减震性能。

Shaking table test and analysis of core-tube partial suspension structures

A type of core-tube partial suspension structure is proposed.It take advantage of both the core-tube suspension structure that is good in earthquake resistant performance and the frame core-tube structure that has more lines of seismic resistance,consisting of core-tube suspension with dampers and pure concrete blocks between core tube and suspension floors in the upper four-storey for strong seismic responses and frame core-tube in the bottom four-storey for weak seismic responses.The system can achieve effective control over earthquake responses.A shaking table test of a 1/10 scale model of this type of structure,involving elastic and elasto-plastic stages,is described.A dynamical model is formulated and the dynamic characteristics and earthquake responses of the structure under the El Centro wave are analyzed.The experimental results indicate that the structure performs well under seismic conditions.The elastic and elasto-plastic time-history analyses of the structure are conducted by using SAP2000,and the simulation results agree well with those of the experiment.