应用MR阻尼器的混合结构非线性地震损伤控制
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摘要
应用MR阻尼器对钢框架-混凝土核心筒混合结构的非线性地震损伤实施控制。分别建立钢框架和混凝土核心筒的损伤准则,通过LS-DYNA有限元程序的二次开发功能,将MR阻尼器的Bouc-Wen出力模型、半主动控制律和钢材的弹塑性损伤本构模型引入到主程序中,并对结构各层阻尼器的出力能力进行优化设计。以强震下一15层钢-混凝土混合结构为例,数值分析未安装阻尼器、在核心筒与钢框架之间安装阻尼器和在钢框架柱之间安装阻尼器等三种情况下结构的动力响应和损伤发展过程,结果表明两种阻尼器安装方案均能有效控制结构层间位移和结构各层剪力响应,并且受控结构核心筒的损伤指数明显减小。
A nonlinear seismic damage control strategy for steel frame-concrete core tube hybrid structure is presented.The damage criteria for steel frame and concrete tube are proposed,respectively.Furthermore,based on the secondary development of LS-DYNA program the Bouc-Wen model of MR damper,semi-active control law and elasto-plastic damage material model of steel are incorporated into the main program,by which the maximal control force of MR dampers for each story is optimally designed.Taking a 15-story steel-concrete hybrid structure under large earthquake as an example,the dynamic responses and damage process of the structures are analyzed without and with MR dampers located between steel frame and concrete tube,and with MR dampers between the columns of steel frame,respectively.Numerical results indicate that MR dampers can control the story drift and story shear force effectively,and the damage of the core tube may be significantly reduced.
A nonlinear seismic damage control strategy for steel frame-concrete core tube hybrid structure is presented.The damage criteria for steel frame and concrete tube are proposed,respectively.Furthermore,based on the secondary development of LS-DYNA program the Bouc-Wen model of MR damper,semi-active control law and elasto-plastic damage material model of steel are incorporated into the main program,by which the maximal control force of MR dampers for each story is optimally designed.Taking a 15-story steel-concrete hybrid structure under large earthquake as an example,the dynamic responses and damage process of the structures are analyzed without and with MR dampers located between steel frame and concrete tube,and with MR dampers between the columns of steel frame,respectively.Numerical results indicate that MR dampers can control the story drift and story shear force effectively,and the damage of the core tube may be significantly reduced.
引文
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[21]Zhou Y,Lu X L,Huang Z H,et al.Seismic behavior of composite shear walls with multi-embedded steel sections.Part II:Analysis[J].The Structural Design of Tall and Special Buildings,2010,19(6):637-655
[2]Kim H,Lee D.Analysis of shear wall with openings using super elements[J].Engineering Structures,2003,25(8):981-991
[3]Mo Y L,Zhong J,Hsu T T.Seismic simulation of RC wall-type structures[J].Engineering Structures,2008,30(11):3167-3175
[4]谢凡,沈蒲生.一种新型剪力墙多垂直杆单元模型:原理和应用[J].工程力学,2010,(9):154-160(Xie Fan,Shen Pusheng.A new type of multi-vertical-line-element model of shear walls:principle and application[J].Engineering Mechanics,2010,27(9):154-160(in Chinese))
[5]吕西林,卢文生.纤维墙元模型在剪力墙结构非线性分析中的应用[J].力学季刊,2005,26(1):72-80(Lu Xilin,Lu Wensheng.Application of fiber wall element model in nonlinear analysis of shear wall structures[J].Chinese Quarterly of Mechanics,2005,26(1):72-80(in Chinese))
[6]Lu Y,Wei J.Damage-based inelastic response spectra for seismic design incorporating performance considerations[J].Soil Dynamics and Earthquake Engineering,2008,28(7):536-549
[7]Ibarra L F,Krawinkler H.Global collapse of frame structures under seismic excitations[R].Stanford:Stanford University,2005
[8]Williams M S,Sexsmith R G.Seismic damage indices for concrete structures:a state-of-the-art review[J].Earthquake Spectra,1995,11(2):319-349
[9]杜修力,欧进萍.建筑结构地震破坏评估模型[J].世界地震工程,1991(3):52-58
[10]Park Y,Ang A H.Mechanistic seismic damage model for reinforced concrete[J].Journal of Structural Engineering,1985,111(4):722-739
[11]Shen Z,Dong B.An experiment-based cumulative damage mechanics model of steel under cyclic loading[J].Advances in Structural Engineering,1997,1(1):39-46
[12]Pirondi A,Bonora N,Steglich D,et al.Simulation of failure under cyclic plastic loading by damage models[J].International Journal of Plasticity,2006,22(11):2146-2170
[13]杨飏,欧进萍.导管架式海洋平台磁流变阻尼隔震结构的模型试验[J].振动与冲击,2006,25(5):1-5(Yang Yang,Ou Jinping.Experimental research on isolation structure model of jacket offshore platform with MR damper[J].Journal of Vibration and Shock,2006,25(5):1-5(in Chinese))
[14]李惠,刘敏,欧进萍,等.斜拉索磁流变智能阻尼控制系统分析与设计[J].中国公路学报,2005,18(4):37-41(Li Hui,Liu Min,Ou Jinping,et al.Design and analysis of magnetorheological dampers with intelligent control systems for stay cables[J].China Journal of Highway and Transport,2005,18(4):37-41(in Chinese))
[15]何旭辉,陈政清,黄方林,等.洞庭湖大桥斜拉索减振试验研究[J].振动工程学报,2002,15(4):447-450(He Xuhui,Chen Zhengqing,Huang Fanglin,et al.Test of vibration mitigation of a stay cable on the Dongting Lake Bridge[J].Journal of Vibration and Engineering,2002,15(4):447-450(in Chinese))
[16]Yoshida O,Dyke S J.Seismic control of a nonlinear benchmark building using smart dampers[J].Journal of Engineering Mechanics,2004,130(4):386-392
[17]Wongprasert N,Symans M D.Application of a genetic algorithm for optimal damper distribution within the nonlinear seismic benchmark building[J].Journal of Engineering Mechanics,2004,130(4):401-406
[18]Livermore Software Technology Corporation.LS-DYNA Keyword user's manual[M].California:Livermore Software Technology Corporation,2006
[19]Panagiotakos T B,Fardis M N.Deformations of reinforced concrete members at yielding and ultimate[J].ACI Structural Journal,2001,98(2):135-218
[20]刁波,李淑春,叶英华.反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究[J].建筑结构学报,2008,29(1):57-63(Diao Bo,Li Shuchun,Ye Yinghua.Analysis and experiment of cumulated damage of RC structures with special columns under cyclic loading[J].Journal of Building Structures,2008,29(1):57-63(in Chinese))
[21]Zhou Y,Lu X L,Huang Z H,et al.Seismic behavior of composite shear walls with multi-embedded steel sections.Part II:Analysis[J].The Structural Design of Tall and Special Buildings,2010,19(6):637-655
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