基于SMA—橡胶支座和碟形弹簧的球面网壳结构多维隔震  

Multi-Dimensional Seismic Isolation of Spherical Lattice Shell Structures Based on SMA-Rubber Bearing and Disc Spring Device

作　　者：庄鹏[1] 薛素铎[2] 

机构地区：[1]北京建筑工程学院土木与交通工程学院,北京100044 [2]北京工业大学建筑工程学院,北京100124

出　　处：《建筑科学》2012年第1期16-21,共6页Building Science

基　　金：国家自然科学基金资助项目(50778006);北京市优秀人才培养资助项目(2011D005017000006)

摘　　要：球面网壳结构是典型的大跨度空间结构,地震时水平和竖向地面运动分量对其地震响应的影响均十分显著。为了提高其抗震性能,采用SMA—橡胶支座和碟形弹簧形成分段隔震机制以降低结构的多维地震响应。本文建立了SMA—橡胶支座和碟形弹簧的隔震计算模型。进而,根据球面网壳结构多维隔震的动力方程,针对某单层球面网壳结构,开展了其在不同地震作用下的多维隔震控制研究。由时程响应的数值模拟结果可见,多维隔震网壳结构的杆件内力、加速度响应和位移响应较无控结构有了显著的降低,从而验证了所提出的多维隔震技术对于保护球面网壳结构免遭地震灾害破坏的有效性。Spherical lattice shell is a typical long span space structure and its seismic response is evidently influenced by horizontal and vertical components of ground motion.In this paper,SMA-rubber bearings and disc spring devices are developed to form a type of segmented isolation mechanism to improve the seismic performance of the spherical lattice shell structures.A calculation model to capture the isolation behavior of the SMA-rubber bearing and disc spring device is established.According to dynamic equations for the multi-dimensional isolated spherical lattice shell structures,the seismic isolation studies are executed for a single-layer spherical lattice shell under the multi-component earthquake ground motions.The numerical simulation results show that the internal force,acceleration and displacement of the lattice shell are reduced significantly by using such isolation devices.Therefore,the presented multi-dimensional isolation technology can be effectively used to protect the lattice shell structures from damages of earthquake.

关 键 词：多维隔震 球面网壳 SMA—橡胶支座 碟形弹簧 振动控制 

分 类 号：TU33[建筑科学—结构工程] TU352.1