转换层桁架非线性地震损伤分析
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摘要
倒V型柱转换层具有承担和分散上部竖向荷载,以及承受地震作用等多重功能,作为连接上下左右结构构件的重要枢纽,对其抗震可靠性需要作详细深入的分析,以检查其在各种荷载作用下的非线性工作性能、校核设计可靠性、发现薄弱部位等,进而为改进结构设计提出建议。以一实际工程为例,采用考虑弹塑性损伤的混凝土材料模型和混合强化的钢材模型,应用LS-DYNA有限元软件针对转换层X向钢-混凝土组合桁架在大震、中震和小震各工况荷载下结构混凝土和型钢应力分布、混凝土开裂破坏以及结构变形状态等进行分析,以检验转换层结构在小震、中震和大震各工况下所处状态。
The inverted V-type column transfer story can bear the upper load and resist the earthquake actions,as the connection of the up and down around members,its seismic performance should be analyzed intensively to check the nonlinear properties,designed reliability,weak region under different load cases etc.,and to further improve structural design measures.In this paper,based on a practical structure,the steel-concrete composite truss in X direction of the transfer story under big,middle,and small earthquakes are analyzed using the elastic-plastic damage material model of concrete and combined hardening steel model in LS-DYNA program,both the concrete and steel stress,the cracks of concrete,and the deformation of the truss are all analyzed to verify the working status of transfer story under small,middle,and big earthquakes.
The inverted V-type column transfer story can bear the upper load and resist the earthquake actions,as the connection of the up and down around members,its seismic performance should be analyzed intensively to check the nonlinear properties,designed reliability,weak region under different load cases etc.,and to further improve structural design measures.In this paper,based on a practical structure,the steel-concrete composite truss in X direction of the transfer story under big,middle,and small earthquakes are analyzed using the elastic-plastic damage material model of concrete and combined hardening steel model in LS-DYNA program,both the concrete and steel stress,the cracks of concrete,and the deformation of the truss are all analyzed to verify the working status of transfer story under small,middle,and big earthquakes.
引文
[1]王心田.建筑结构体系与选型[M].上海:同济大学出版社,2003
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[12]GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010(GB50010—2010 Code for designof concrete structures[S].Beijing:China Architecture andBuilding Press,2010(in Chinese))
[13]GB50017—2003钢结构设计规范[S].北京:中国计划出版社,2003(GB50017—2003 Code for design of steelstructures[S].Beijing:China Planning Press,2003(inChinese))
[2]罗福午,张慧英,杨军.建筑结构概念设计及案例[M].北京:清华大学出版社,2003(Luo Fuwu,ZhangHuiying,Yang Jun.Conceptual design and case study ofbuilding structure[M].Beijing:Tsinghua UniversityPress,2003(in Chinese))
[3]傅学怡.带转换层高层建筑结构设计建议[J].建筑结构学报,1999,20(2):28-42(Fu Xueyi.Designproposals of tall building structures with transfer stories[J].Journal of Building Structures,1999,20(2):28-42(in Chinese))
[4]唐兴荣.高层建筑转换层结构设计与施工[M].北京:中国建筑工业出版社,2002
[5]戴国亮,蒋永生,傅传国,等.高层型钢混凝土底部大空间转换层结构性能研究[J].土木工程学报,2003,36(4):24-32(Dai Guoliang,Jiang Yongsheng,FuChuanguo,et al.Experimental study on aseismic behaviorsof transfer story with steel reinforced concrete in low storiesof large space[J].China Civil Engineering Journal,2003,36(4):24-32(in Chinese))
[6]LS-DYNA.Keyword user's manual[M].Livermore,California:Livermore Software TechnologyCorporation,2006
[7]Chen W F,Han D J.Plasticity for structural engineers[M].New York:Springer-Verlag,1988
[8]Schwer L E,Murray Y D.A three-invariant smooth capmodel with mixed hardening[J].International Journal forNumerical and Analytical Methods in Geomechanics,1994,18(10):657-688
[9]Rubin M B.Simple,convenient isotropic failure surface[J].Journal of Engineering Mechanics,1991,117(2):348-369
[10]Simo J C,Ju J W.Strain and stress based continuumdamage model-I.formulation[J].International Journal ofSolids and Structures,1987,23(7):821-840
[11]Simo J C,Ju J W.Strain-and stress-based continuumdamage models-II.computational aspects[J].International Journal of Solids and Structures,1987,23(7):841-869
[12]GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010(GB50010—2010 Code for designof concrete structures[S].Beijing:China Architecture andBuilding Press,2010(in Chinese))
[13]GB50017—2003钢结构设计规范[S].北京:中国计划出版社,2003(GB50017—2003 Code for design of steelstructures[S].Beijing:China Planning Press,2003(inChinese))
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