新型变刚度滑移支座在网壳中的隔震性能研究  

Analysis on Seismic Performance of Reticulated Shell with a New Type of Variable Stiffness Sliding Bearing

作　　者：贺拥军[1] 程雅 周绪红[2] HE Yongjun;CHENG Ya;ZHOU Xuhong(College of Civil Engineering,Hunan University,Changsha 410082,China;School of Civil Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]重庆大学土木工程学院,重庆400044

出　　处：《湖南大学学报（自然科学版）》2022年第3期145-153,共9页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51890902,51878261)。

摘　　要：提出了一种变刚度滑移支座(NonlinearSpring-FrictionBearing,NFB),该支座由非线性圆锥弹簧和平面滑移支座组成;结合支座构造特点和工作原理建立了该支座的理论模型;利用有限元软件建立支座的实体模型,研究其滞回性能和应力分布状态,并分析圆锥弹簧关键参数对滞回特性的影响;将NFB和常见定刚度滑移支座应用于单层球面网壳进行三向地震作用下的时程分析,考察其隔震性能,并引入隔震系数对结构整体隔震效果进行评估.结果表明:NFB可有效降低多维地震下网壳结构的地震响应,且相对定刚度滑移支座有更好的节点相对位移、支座位移控制能力和支座自复位能力.A nonlinear spring-friction bearing(NFB)composed of a nonlinear conical spring and a plane slip bearing was proposed.The theoretical model of the bearing was established based on the structural characteristics and working principle of the bearing.The solid model of the bearing was established using the finite element soft⁃ware,the hysteretic properties,and stress distribution of the bearing were studied.The influence of the key param⁃eters of the cone spring on the hysteretic characteristics was analyzed.The time-history analysis of single-layer spherical reticulated shells with NFB and common fixed-stiffness sliding bearings under three-direction seismic ac⁃tion was carried out to investigate the isolation performance,and the isolation coefficient was introduced to evaluate the overall isolation effect of the structure.The results show that the NFB can effectively reduce the seismic response of the reticulated shell structure under multi-dimensional earthquakes.It has better joint relative displacement,bear⁃ing displacement control ability,and bearing self-reset ability when compared with the fixed stiffness slip bearing.

关 键 词：隔震 变刚度 滑移支座 圆锥弹簧 单层球面网壳 地震响应 

分 类 号：TU393.3[建筑科学—结构工程]