不同类型串联隔震体系竖向承载力对比分析
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摘要
取叠层橡胶支座隔震结构与地下室柱所组成的串联隔震结构为研究对象,对比独立柱串联隔震和独立柱加柱顶连梁串联隔震体系竖向承载性能。采用ABAQUS非线性有限元软件建立1个独立柱串联隔震体系和3种具有不同梁柱线刚度比的独立柱加连梁的串联隔震体系有限元模型,并在不同初始水平力作用下进行竖向单调加载试验的数值模拟。定量对比分析串联隔震体系竖向承载力-位移曲线随不同水平力初始值、不同梁柱线刚度比的变化规律,分析这两个主要因素对串联隔震体系竖向极限承载力及结构体系破坏形式的影响。结果表明:在地下室柱顶增加连梁,串联隔震体系竖向承载力的极限值与梁柱线刚度比值成正比,而与水平力初始值的大小成反比,但竖向承载力极限值增加的幅度与水平力初始值的大小成正比,但竖向承载力极限值增加的幅度与水平力初始值的大小成正比。
Taking the serial seismic isolation system,which consists of laminated rubber bearing mounted on top of basement column,as the investigated subject,the vertical load bearing capacity of serial isolation system with independent column are compared with that of the serial isolation system with link beam on top of basement column.1 FEM model of serial isolation system with independent column and 3 models of serial isolation system with link beam of different beam-column linear stiffness ratios are established using nonlinear FEM Software ABAQUS,and a monotonic loading test of the serial isolation system is numerically simulated combined with horizontal loading of different initial values.The vertical-horizontal loading curve of serial isolation system are quantitatively compared for different initial values of horizontal load and different values of beam-column linear stiffness ratios,and the effect of these two factors on the ultimate vertical loading and on the damage pattern of serial isolation system are investigated.The result shows that the increase of vertical load bearing capacity of serial isolation system is directly proportional to beam-column linear stiffness ratios,and is inversely proportional to initial value of horizontal load.However,the relative degree of increase of vertical load bearing capacity is roughly proportional to initial value of horizontal load.However,the relative degree of increase of vertical load bearing capacity is roughly proportional to initial value of horizontal load.
Taking the serial seismic isolation system,which consists of laminated rubber bearing mounted on top of basement column,as the investigated subject,the vertical load bearing capacity of serial isolation system with independent column are compared with that of the serial isolation system with link beam on top of basement column.1 FEM model of serial isolation system with independent column and 3 models of serial isolation system with link beam of different beam-column linear stiffness ratios are established using nonlinear FEM Software ABAQUS,and a monotonic loading test of the serial isolation system is numerically simulated combined with horizontal loading of different initial values.The vertical-horizontal loading curve of serial isolation system are quantitatively compared for different initial values of horizontal load and different values of beam-column linear stiffness ratios,and the effect of these two factors on the ultimate vertical loading and on the damage pattern of serial isolation system are investigated.The result shows that the increase of vertical load bearing capacity of serial isolation system is directly proportional to beam-column linear stiffness ratios,and is inversely proportional to initial value of horizontal load.However,the relative degree of increase of vertical load bearing capacity is roughly proportional to initial value of horizontal load.However,the relative degree of increase of vertical load bearing capacity is roughly proportional to initial value of horizontal load.
引文
[1]Du Yongfeng,Lin Zhidan,Li Hui.Analysis of bucklingfailure of rubber isolators serially connected with cantilevercolumn subject to major earthquakes[C]//Proceedings of 13thInternational Conference on Computing in Civil and BuildingEngineering.Nottingham,UK,2010
[2]Buckle I,Nagarajaiah S,Ferrell K.Stability of elastomericisolation bearings:experimental study[J].Journal of StructuralEngineering,2002,128(1):3-11
[3]Du Yongfeng,Li Hui,Zhu Qiankun,et al.A stabilitystudy on laminated rubber bearing serially connected withcolumn[C]//Proceedings of 11th World Conference onSeismic Isolation,Energy Dissipation and Active VibrationControl of Structures.Guangzhou,2009
[4]党育,杜永峰,李慧.基础隔振结构设计及施工指南[M].北京:知识产权出版社,2007
[5]Setunge S.Stress-strain relationship of confined andunconfined concrete[J].ACI Materials Journal,1996,93(5):432-442
[6]庄茁.基于ABAQUS的有限元分析和应用[M].北京:清华大学出版社,2009
[7]易太连,翁雪涛,朱石坚.不可压缩橡胶体的静态性能分析[J].海军工程大学学报,2002,14(1):76-80(Yi Tailian,Weng Xuetao,Zhu Shijian.Analysis of staticcharacteristics of nearly incompressible rubber materials[J].Naval University of Engineering,2002,14(1):76-80(in Chinese))
[8]日本建筑学会.隔震结构设计[M].刘文光,译.北京:地震出版社,2006
[9]杨静成.叠层橡胶支座与柱串联隔震体系稳定性分析[D].兰州:兰州理工大学,2009(Yang Jingcheng.Astability study on laminated rubber bearing seriallyconnected with column[D].Lanzhou:Lanzhou Universityof Technology,2009(in Chinese))
[10]韩登.地下室柱顶连梁对串联隔震体系稳定性的影响[D].兰州:兰州理工大学,2010(Han Deng.Effect of linkbeam connected on top of basement column on stability ofserial isolation system[D].Lanzhou:Lanzhou University ofTechnology,2010(in Chinese))
[2]Buckle I,Nagarajaiah S,Ferrell K.Stability of elastomericisolation bearings:experimental study[J].Journal of StructuralEngineering,2002,128(1):3-11
[3]Du Yongfeng,Li Hui,Zhu Qiankun,et al.A stabilitystudy on laminated rubber bearing serially connected withcolumn[C]//Proceedings of 11th World Conference onSeismic Isolation,Energy Dissipation and Active VibrationControl of Structures.Guangzhou,2009
[4]党育,杜永峰,李慧.基础隔振结构设计及施工指南[M].北京:知识产权出版社,2007
[5]Setunge S.Stress-strain relationship of confined andunconfined concrete[J].ACI Materials Journal,1996,93(5):432-442
[6]庄茁.基于ABAQUS的有限元分析和应用[M].北京:清华大学出版社,2009
[7]易太连,翁雪涛,朱石坚.不可压缩橡胶体的静态性能分析[J].海军工程大学学报,2002,14(1):76-80(Yi Tailian,Weng Xuetao,Zhu Shijian.Analysis of staticcharacteristics of nearly incompressible rubber materials[J].Naval University of Engineering,2002,14(1):76-80(in Chinese))
[8]日本建筑学会.隔震结构设计[M].刘文光,译.北京:地震出版社,2006
[9]杨静成.叠层橡胶支座与柱串联隔震体系稳定性分析[D].兰州:兰州理工大学,2009(Yang Jingcheng.Astability study on laminated rubber bearing seriallyconnected with column[D].Lanzhou:Lanzhou Universityof Technology,2009(in Chinese))
[10]韩登.地下室柱顶连梁对串联隔震体系稳定性的影响[D].兰州:兰州理工大学,2010(Han Deng.Effect of linkbeam connected on top of basement column on stability ofserial isolation system[D].Lanzhou:Lanzhou University ofTechnology,2010(in Chinese))
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