SMA弹簧-摩擦支座在双层球面网壳结构中的隔震控制分析  

SEISMIC ISOLATION ANALYSIS OF SMA SPRING-FRICTION BEARINGS IN DOUBLE LAYER SPHERICAL LATTICE SHELL STRUCTURES

作　　者：庄鹏[1,2] 薛素铎[3] 韩淼[1,2] 

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学"工程结构与新材料"北京高等学校工程研究中心,北京100044 [3]北京工业大学建筑工程学院,北京100124

出　　处：《工业建筑》2015年第1期43-49,61,共8页Industrial Construction

基　　金：国家自然科学基金项目(51078010;51278008);教育部长江学者和创新团队发展计划资助项目;教育部博士点学科专项科研基金(20121103110021);北京市自然科学基金资助项目(8132024);北京市优秀人才培养资助项目(2011D005017000006)

摘　　要：提出一种由形状记忆合金(shape memory alloy,简称SMA)螺旋弹簧和平面滑动支座组成的SMA弹簧-摩擦支座(SMA Spring-Friction Bearing,简称SFB)。根据SFB的构造和工作原理,推导了描述其力学性能的理论模型。为考察SFB在双层球面网壳结构隔震控制中的适用性和减振效果,将SFB设置在网壳屋盖与下部结构之间形成柱顶隔震机制。通过有限元分析软件SAP 2000建立含有下部结构的网壳结构隔震体系数值计算模型,针对这一网壳隔震体系的地震响应进行数值模拟。计算结果表明,SFB能够有效降低网壳结构的地震响应,并具有优良的支座位移控制性能与复位能力。A friction bearing conbined with large size SMA coil springs was put forward to develop a new type of isolator entitled as SMA spring-friction bearing ( SFB) .Based on the configuration and working principle , theoretical model of mechanical performance of the SFB was derived .In order to investigate feasibility and vibration reduction effect of the SFB in double layer spherical lattice shell structures , a column top isolation structrue with the SMA-based bearings installed between the lattice shell roof and the substructure was considered .The finite element analysis software SAP 2000 was utilized to establish the numerical model of the isolated lattice shell structure with substructure .Numerical simulation of dynamic response of the seismically isolated structure was carried out .The calculation results indicated that the proposed SFB could reduce the seismic response of the lattice shell structures effectively , and that the SFB had excellent bearing displacement control performance and re -centring capability .

关 键 词：形状记忆合金(SMA) 隔震 双层球面网壳 下部结构 地震响应 

分 类 号：TU399[建筑科学—结构工程] TU352.12