FPS型隔震结构动力性能研究

Research on Dynamical Characteristics of Friction Pendulum System

为了研究FPS型隔震结构的动力特性,针对串联刚片模型,从理论上建立了双向水平地震作用下FPS型隔震结构的平-扭耦联动力方程,并对一空间RC框架隔震和非隔震结构进行动力时程反应分析,得出了不同地震波作用下结构各层的加速度反应、层间位移角、扭转位移比等参数的变化特点。结果表明,FPS型隔震装置能够有效延长上部结构的自振周期,限制隔震层过大位移,降低整体结构的扭转反应,有效减少了地震作用对上部结构的影响,亦提高了串联隔震结构的空间稳定性,隔震效果明显。

In order to study the dynamic characteristics of FPS type seismic isolation structure and target at the serial-connect steel disc model,establish the translation-torsion coupling dynamic equation of FPS type seismic isolation structure under the function of horizontal earthquake theoretically and conduct the dy- namic time history response analysis on spatial RC frame seismic isolation structure and non-seismic isola- tion structure,obtain the changing characteristics of various parameter in each structural layer under the function of different seismic waves such as acceleration response, inter-layer displacement angle and tor- sional displacement ratio.Results show that the FPS type seismic isolation structure can efficient extend the natural vibration period of upper structure, limit the over-displacement of seismic isolation layer, reduce the torsional response of integral structure, efficient reduce the influence of earthquake action on upper struc- ture and also increase the spatial stability of serial-connect serially seismic isolation structure,the effect of seismic isolation is remarkable.