新型自复位三维隔震结构动力响应数值模拟分析
摘要：针对常规水平隔震结构竖向加速度被放大、钢弹簧三维隔震支座抗拉能力差且易发生提离失效等问题，研发新型自复位抗拉三维隔震支座，使结构具有三维隔震能力，防止支座发生提离失效。通过有限元分析软件SAP2000建立采用叠层橡胶隔震支座的常规水平隔震结构模型和采用新型自复位抗拉三维隔震支座的三维隔震结构模型，并对比分析不同地震波作用下的结构动力响应。研究结果表明，常规水平隔震结构水平加速度响应相对于地面显著减小，但竖向加速度响应相对于地面显著增大;三维隔震结构水平加速度响应相对于地面显著减小，竖向加速度响应相对于地面未出现显著放大现象;在地面峰值加速度为0.6g的工况下，常规水平隔震结构隔震支座进入受拉状态，但三维隔震结构隔震支座一直处于受压状态。
关键词：隔震支座三维隔震自复位动力响应有限元分析
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[4] KALPAKIDIS I V,CONSTANTINOU M C.Effects of heating on the behavior of lead-rubber bearings.II:verification of theory[J].Journal of structural engineering,2009,135(12):1450-1461．
[5] RAVARI A K,OTHMAN I,IBRAHIM Z,et al.Variations of horizontal stiffness of laminated rubber bearings using new boundary conditions[J].Scientific research and essays,2011,6(14):3065-3071．
[6] 刘文光，杨巧荣，周福霖，等．橡胶座非线性弹性回转剪切特性的理论和试验研究[J]．地震工程与工程振动，2004(1):172-179．
[7] 刘文光，杨巧荣，周福霖，等．橡胶座非线性弹性拉伸特性的理论和试验研究[J]．地震工程与工程振动，2004 (2):158-167．
[8] ABE M,YOSHIDA J,FUJINO Y.Multiaxial behaviors of laminated rubber bearings and their modeling.I:experimental study[J].Journal of structural engineering,2004,130 (8):1119-1132．
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[13] 曹建亚，张灏．北京大兴国际机场大直径隔震支座施工技术[J]．施工技术，2020,49(1):122-125．
[14] 吴国来，陈启冬，张东鹏，等．隔震支座下支墩(柱)预埋钢板下部填充工法试验研究[J]．施工技术，2020,49 (13):114-117．
[15] 段先军，刘云飞，雷素素，等．北京大兴国际机场航站楼核心区工程层间隔震支座及防火包封施工技术[J]．施工技术，2019,48(14):16-19,65．
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[20] 孟庆利，林德全，张敏政．三维隔震系统振动台实验研究[J]．地震工程与工程振动，2007(3):116-120.
Numerical Simulation Analysis of Dynamic Response for Innovative Self-centering Three-dimensional Isolated Structure
Abstract: Aiming at the problems of enlarged vertical acceleration of conventional horizontal isolation structures,poor tensile strength of steel spring three-dimensional isolation bearings and easy lift-off failures,a innovative self-centering three-dimensional isolation bearings was proposed to make the structure have three-dimensional isolation capability and prevent the isolator from lifting failure. The finite element analysis software SAP2000 was used to establish a conventional horizontal isolated structure with laminated rubber isolation bearings and a three-dimensional isolated structure with self-centering threedimensional isolation bearings. The dynamic response of the two models under different seismic waves were compared and analyzed. The research results show that the horizontal acceleration response of the conventional horizontal isolated structure is reduced relative to the ground acceleration,however,the vertical acceleration response of the conventional horizontal isolated structure is significantly enlarged relative to the ground acceleration. The horizontal acceleration response of the three-dimensional isolated structure is significantly reduced relative to the ground acceleration. The vertical acceleration response of the three-dimensional isolated structure is equivalent to the ground acceleration, and there is no acceleration amplification. When the peak ground acceleration is 0. 6 g,the isolation bearings of the conventional horizontal isolated structure is in tension state,however,the isolation bearings of the threedimensional isolated structure are always in compression state.
Keywords: isolation bearings; three-dimension isolation; self-centering; dynamic response; finite element analysis
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