FPS型隔震结构动力性能研究

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。

Research on Dynamical Characteristics of Friction Pendulum System

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 dynamic time history response analysis on spatial RC frame seismic isolation structure and non-seismic isolation 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 torsional 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 structure and also increase the spatial stability of serial-connect serially seismic isolation structure,the effect of seismic isolation is remarkable.