设置改进型三重摩擦摆支座的双层网壳结构的地震响应分析  

SEISMIC RESPONSE OF DOUBLE-LAYER SPHERICAL LATTICE SHELLS WITH THE MODIFIED TRIPLE FRICTION PENDULUM BEARING

作　　者：李晓东[1] 张凯[1] 张家源[1] LiXiaodong Zhang Kai Zhang Jiayuan(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Chin)

机构地区：[1]兰州理工大学土木工程学院,兰州730050

出　　处：《钢结构》2016年第12期1-6,共6页Steel Construction

基　　金：国家创新基金项目(11C26216206242);甘肃省自然科学基金项目(1104ZSB083)

摘　　要：改进型三重摩擦摆隔震支座是一种新型隔震支座,通过在传统三重摩擦摆支座四角设置黏滞阻尼器得到。将这种隔震支座用于双层球面网壳结构中,分析设置固定铰支座、传统三重摩擦摆支座和改进型三重隔震支座的三种不同支座的网壳模型。通过地震响应分析,提取了杆件轴力、节点加速度、柱脚反力和支座位移时程曲线。结果表明:与设置固定铰支座的双层网壳相比,改进型三重摩擦摆支座的结构地震响应大大减小;与设置传统三重摩擦摆支座的结构相比,杆件轴力及节点加速度略有增大,但是能有效地减小支座滑动位移,克服了摩擦摆支座因滑移位移大而在建筑中的使用大大受到限制的缺点,改善了下部柱子偏心受压的情况。阻尼器的存在还使上部结构和柱子之间产生拉力,使柱子轴力减小,进一步说明改进型支座具有抗拔性,满足拉压型构造的要求。The modified triple friction pendulum bearing is a new type of bearings,which is obtained by installing four viscous dampers in the four corners of the traditional triple friction pendulum bearing. There are three models which include common structure,isolation structure with traditional tripe pendulum bearing and isolation structure with modified triple friction pendulum bearing. The three models of seismic isolation device were applied to double-layer spherical reticulated shell. Through seismic response analysis, the displacement time-history curve of the axial force of the members,acceleration of joints,counter-force of the column base and displacement of isolation bearing were obtained. The results showed that compared with common structure,the seismic response of isolation structure with modified triple friction pendulum bearing reduced significantly; compared with the structure with traditional tripe pendulum bearing,the axial force of the pole and acceleration of nodes increased a little,the eccentric compression of the column was modified to a certain degree,but the displacement of isolation bearing could be reduced effectively,which overcome the defect that when displacement of isolation bearing was large,its scope of application was greatly limited. The tension between the upper structure and column was produced by using damper,and the axial force of the column was reduced,which illustrated that the modified triple friction pendulum bearing had an advantage over uplifting resistance and met the requirements of tensioncompression tectonics.

关 键 词：改进型三重摩擦摆隔震支座 双层网壳 阻尼器 位移 地震响应 

分 类 号：TU399[建筑科学—结构工程] TU311.3