串联隔震体系的大变形力学行为分析与试验
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摘要
研究了由叠层橡胶隔震支座和地下室悬臂柱组成的串联隔震体系的大变形行为。考虑轴向伸长、一阶剪切变形,建立了串联隔震体系大变形分析的几何非线性控制方程,并利用微分求积单元法进行了数值求解。结果表明,串联隔震体系大变形主要出现在叠层橡胶隔震支座处,地下室悬臂柱各处内力值呈近似均匀分布,计算结果与试验结果规律吻合。
The large deformation behavior of series isolation system in which the rubber bearing is connected with the basement column was studied.The geometric nonlinear equations were obtained in accordance with the Timoshenko beams model,based on the axial elongation and first-order shear deformation theory.Then the large deformation behaviors of series isolation system were analyzed by using differential quadrature element method.The results show that the large deformation of series isolation system mainly occurs in the rubber bearings,while the internal force on the column maintains approximately evenly distributed.The theoretical results are consistent with those of the test.
The large deformation behavior of series isolation system in which the rubber bearing is connected with the basement column was studied.The geometric nonlinear equations were obtained in accordance with the Timoshenko beams model,based on the axial elongation and first-order shear deformation theory.Then the large deformation behaviors of series isolation system were analyzed by using differential quadrature element method.The results show that the large deformation of series isolation system mainly occurs in the rubber bearings,while the internal force on the column maintains approximately evenly distributed.The theoretical results are consistent with those of the test.
引文
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[6]Kelly J M.Tension buckling in multilayer elastomericbearings[J].Journal of Engineering Mechanics,2003,129(12):1363-1368.
[7]Warm G P,Whittaker A,Constantinou M.Vertical stiffness ofelectrometric and lead-rubber seismic isolation bearings[J].Journal of Strutural Engineering,2007,133(9):1227-1236.
[8]Liu W G,He W F,Feng D M,et al.Vertical stiffness anddeformation analysis models of rubber isolators in compressionand compression-shear states[J].Journal of EngineeringMechanics,2009,135(9):.945-952.
[9]Yang Q R,Liu W G,He W F,et al.Tensile stiffness anddeformation model of rubber isolators in tension and tension-shear states[J].Journal of Engineering Mechanics,2010,136(4):429-437.
[10]王建强,丁永刚.上部结构(偏心)对基础滑移隔震结构平-扭耦联地震反应的影响[J].振动与冲击,2009,28(12):96-100.
[11]周锡元,韩淼,曾德民,等.橡胶支座与R/C柱串联隔震系统水平刚度系数.[J].振动工程学报,1999.12(2):157-165.
[12]周锡元,韩淼,曾德民,等.组合橡胶支座及橡胶支座与住串联系统的水平刚度计算方法.[J].地震工程与工程振动,1999.19(4):67-75.
[13]周福霖.工程结构减震控制[M].北京:地震出版社,1997:85-86.
[2]Gent A N.Elastic stability of rubber compression springs[J].Journal of Engineering Mechanics,1964.6(4):318-326.
[3]Koh C G,Kelly J M.A simple mechanical model forelectrometric bearings used in base isolation[J].Journal ofEngineering Mechanics,1988,30(12):933-943.
[4]Nagarajaiah S,Ferrell K.Stability of electrometric seismicisolation bearings[J].Journal of Strutural Engineering,1999.125(9):946-954.
[5]Buckle I,Nagarajaiah S,Ferrell K.Stability of electrometricisolation bearings:Experimental study[J].Journal ofStrutural Engineering,2002,128(1):3-11.
[6]Kelly J M.Tension buckling in multilayer elastomericbearings[J].Journal of Engineering Mechanics,2003,129(12):1363-1368.
[7]Warm G P,Whittaker A,Constantinou M.Vertical stiffness ofelectrometric and lead-rubber seismic isolation bearings[J].Journal of Strutural Engineering,2007,133(9):1227-1236.
[8]Liu W G,He W F,Feng D M,et al.Vertical stiffness anddeformation analysis models of rubber isolators in compressionand compression-shear states[J].Journal of EngineeringMechanics,2009,135(9):.945-952.
[9]Yang Q R,Liu W G,He W F,et al.Tensile stiffness anddeformation model of rubber isolators in tension and tension-shear states[J].Journal of Engineering Mechanics,2010,136(4):429-437.
[10]王建强,丁永刚.上部结构(偏心)对基础滑移隔震结构平-扭耦联地震反应的影响[J].振动与冲击,2009,28(12):96-100.
[11]周锡元,韩淼,曾德民,等.橡胶支座与R/C柱串联隔震系统水平刚度系数.[J].振动工程学报,1999.12(2):157-165.
[12]周锡元,韩淼,曾德民,等.组合橡胶支座及橡胶支座与住串联系统的水平刚度计算方法.[J].地震工程与工程振动,1999.19(4):67-75.
[13]周福霖.工程结构减震控制[M].北京:地震出版社,1997:85-86.
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