双层球面网壳屋盖结构的摩擦摆层间隔震研究

Mid-Story Isolation of Double-layer Spherical Lattice Shells using FPS Bearings

为了深入研究摩擦摆(FPS)隔震网壳结构的抗震性能,将这种隔震装置用于双层球面网壳结构的层间隔震。首先介绍了FPS支座的减振原理,建立了层间隔震网壳结构的运动方程。通过层间隔震双层球面网壳屋盖模型在三向地震作用下的时程分析,全面考察了屋盖结构、支承结构和FPS支座的地震响应。研究结果表明,FPS支座有利于保护整体结构,可有效地应用于球面网壳屋盖结构的层间隔震。

To study seismic performances of lattice shell structures with Friction Pendulum System（FPS）,such a seismic isolation device is applied to mid-story isolation of double-layer spherical lattice shell structures.Vibration mitigation principle of the FPS is briefly described.Equations of motion of the mid-story isolated lattice shell with FPS bearings are established.Then,time-history analyses are performed for mid-story isolation of roof of double-layer spherical lattice shell models subjected to three-component seismic excitations,and the seismic responses of the superstructures,substructures and the FPS bearings are investigated comprehensively.The results show that the FPS bearings are of benefit to protecting the whole structures and can be effectively utilized to the mid-story isolation of spherical lattice shell roofs.