基于纤维模型的空间网架支承体系的优化设计与分析
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摘要
近年来,民用航空制造业的快速发展给大柱距空间网架结构带来新的契机。本文针对某大柱距厂房设计了无柱间支撑、柱间钢支撑和柱间消能支撑3种抗侧力结构体系。在此基础上,分别建立了3种结构体系的三维整体有限元模型,通过优化设计确立了钢支撑和消能支撑的具体设计参数,并进行了多遇地震作用下的弹性时程对比分析。最后,建立了结构弹塑性分析的纤维模型,对3种结构体系进行了罕遇地震作用下的弹塑性时程分析,对比研究了3种结构体系在大震作用下的倒塌机制。结果表明:采用纤维模型能够较为精确地进行结构的弹塑性时程分析;相较于不加柱间支撑结构体系,柱间钢支撑和柱间消能支撑结构体系在多遇地震作用下的结构层间位移分别衰减约32%和64%,在罕遇地震作用下的结构层间位移分别衰减约12%和46%,且均具有更好的倒塌机制。本文可供大柱距空间结构的设计与分析参考和借鉴。
In recent years,according to the rapid development in civil aviation industry,there is a new development chance for its spatial grid structures with large column spacing.In this paper,the lateral resistant system of a factory building with large column spacing is optimally designed for its structure.Three structure schemes of the lateral resistant system is determined preliminarily,in which the structure is without braces,with steel braces or with energy dissipation braces between columns respectively. After the above work,the three-dimensional finite element models of these three schemes are established,and the elastic time-history analysis is done under frequent earthquake,then the concrete design parameters of the steel braces and the energy dissipation braces are confirmed through repeated optimization calculation.Finally,the elasto-plastic performance of the three schemes is analyzed under rare earthquake,and the collapse mechanisms are studied.The analysis results indicate that: fiber model can be used for the elasto-plastic time-history analysis;compared with the story drift of the scheme without braces between columns,the story drifts of the scheme with steel braces and the scheme with energy dissipation braces between columns are decreased by 32% and 64% respectively under frequent earthquake,and the data are 12% and 46% under rare earthquake;and obviously the collapse resistant capacity of the latter two schemes are much better.The study of this paper can provide an important reference for design and analysis of the spatial grid structures with large column spacing.
In recent years,according to the rapid development in civil aviation industry,there is a new development chance for its spatial grid structures with large column spacing.In this paper,the lateral resistant system of a factory building with large column spacing is optimally designed for its structure.Three structure schemes of the lateral resistant system is determined preliminarily,in which the structure is without braces,with steel braces or with energy dissipation braces between columns respectively. After the above work,the three-dimensional finite element models of these three schemes are established,and the elastic time-history analysis is done under frequent earthquake,then the concrete design parameters of the steel braces and the energy dissipation braces are confirmed through repeated optimization calculation.Finally,the elasto-plastic performance of the three schemes is analyzed under rare earthquake,and the collapse mechanisms are studied.The analysis results indicate that: fiber model can be used for the elasto-plastic time-history analysis;compared with the story drift of the scheme without braces between columns,the story drifts of the scheme with steel braces and the scheme with energy dissipation braces between columns are decreased by 32% and 64% respectively under frequent earthquake,and the data are 12% and 46% under rare earthquake;and obviously the collapse resistant capacity of the latter two schemes are much better.The study of this paper can provide an important reference for design and analysis of the spatial grid structures with large column spacing.
引文
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[14]秦从律,张爱晖.基于截面纤维模型的弹塑性时程分析方法[J].浙江大学学报(工学版),2005,39(7):1003-1008.Qin C L,Zhang A H.Nonlinear time history analysisbased on section fiber model[J].Journal of ZhejiangUniversity(Engineering Science),2005,39(7):1003-1008.
[15]李忠诚.钢筋混凝土框架结构弹塑性动力响应分析[J].核动力工程,2009,30(2):41-45.Li Z C.Analysis of elastic-plastic dynamic response ofreinforced concrete frame structure[J].Nuclear Pow-er Engineering,2009,30(2):41-45.
[16]聂利英,李建中,范立础.弹塑性纤维梁柱单元及其单元参数分析[J].工程力学,2004,21(3):15-20.Nie L Y,Li J Z,Fan L C.Elastic-plastic fiber beam-column element and its parametric analysis[J].Engi-neering Mechanics,2004,21(3):15-20.
[17]吕西林,卢文生.纤维杆元模型在框架结构非线性分析中的应用[J].力学季刊,2006,27(1):14-22.LüX L,Lu W S.Application of fiber line elementmodel in nonlinear analysis of frame structures[J].Chinese Quarterly of Mechanics,2006,27(1):14-22.
[18]Wilson E L,Yuan M W,Dickens J M.Dynamic anal-ysis by direct superposition of Ritz vectors[J].Earth-quake Engineering and Structural Dynamics,1982,10(6):813-823.[19]GB 50011-2001,建筑抗震设计规范[S].
[2]钱稼茹,张微敬,朱丹,等.北京A380机库结构地震反应分析[J].土木工程学报,2008,41(2):9-16.Qian J R,Zhang W J,Zhu D,et al.Earthquake re-sponse analyses of Beijing A380 hangar structure[J].China Civil Engineering Journal,2008,41(2):9-16.
[3]沈顺高.大跨度机库方案的概念设计与动力性能研究[D].北京:清华大学,2002.Shen S G.Research on the concept design and dynam-ic behavior of long-span hangar[D].Beijing:Ts-inghua University,2002.
[4]程文,隋杰英,陈月明,等.宿迁市交通大厦采用粘弹性阻尼器的减震设计与研究[J].建筑结构学报,2000,21(3):30-35.Cheng W R,Sui J Y,Chen Y M,et al.Design andstudy on earthquake absorption using viscoelasticdamper in transportation building of Suqian city[J].Journal of Building Structures,2000,21(3):30-35.
[5]Sharabash A M,Andrawes B O.Application of shapememory alloy dampers in the seismic control of cable-stayed bridges[J].Engineering Structures,2009,31(2):607-616.
[6]李爱群,瞿伟廉,程文.南京电视塔风振的混合控制研究[J].建筑结构学报,1996,17(3):9-17.Li A Q,Qu W L,Cheng W R.Research on hybridvibration control of Nanjing TV Tower under windexcitation[J].Journal of Building Structures,1996,17(3):9-17.
[7]薛素铎.隔震与消能减振技术在大跨屋盖结构中的应用概况[J].建筑结构,2005,35(3):51-53.Xue S D.Applications of seismic isolation and energydissipation techniques in long-span roof strucures[J].Building Structure,2005,35(3):51-53.
[8]徐庆阳.大跨机库结构减震分析与优化研究[D].南京:东南大学,2008.Xu Q Y.Research on vibration control and optimiza-tion analysis of long-span hangar[D].Nanjing:Southeast University,2008.
[9]徐庆阳,李爱群,沈顺高,等.大跨空间网架结构采用消能减震技术的研究[J].工业建筑,2007,37(7):85-88.Xu Q Y,Li A Q,Shen S G,et al.Research of seis-mic energy dissipation method for long-span spacetruss structures[J].Industrial Construction,2007,37(7):85-88.
[10]张微敬,钱稼茹,沈顺高,等.北京A380机库采用粘滞阻尼器的减振控制分析[J].建筑结构学报,2009,30(2):1-7.Zhang W J,Qian J R,Shen S G,et al.Vibration re-duction analyses of BeijingA380 hangar structure withviscous dampers[J].Journal of Building Structures,2009,30(2):1-7.
[11]Filippou F C,Ambrisi A,Issa A.Effects of rein-forcements slip on hysteretic behavior of reinforcedconcrete frame members[J].ACI Structural Journal,1996,96(3):327-335.
[12]Spacone E.Fiber beam-column model for non-linearanalysis of R/C frames:part.formulation[J].Earthquake Engineering and Structural Dynamics,1996,25(7):711-725.
[13]Spacone E.Fiber beam-column model for non-linearanalysis of R/C frames:part.applications[J].Earthquake Engineering and Structural Dynamics,1996,25(7):727-742.
[14]秦从律,张爱晖.基于截面纤维模型的弹塑性时程分析方法[J].浙江大学学报(工学版),2005,39(7):1003-1008.Qin C L,Zhang A H.Nonlinear time history analysisbased on section fiber model[J].Journal of ZhejiangUniversity(Engineering Science),2005,39(7):1003-1008.
[15]李忠诚.钢筋混凝土框架结构弹塑性动力响应分析[J].核动力工程,2009,30(2):41-45.Li Z C.Analysis of elastic-plastic dynamic response ofreinforced concrete frame structure[J].Nuclear Pow-er Engineering,2009,30(2):41-45.
[16]聂利英,李建中,范立础.弹塑性纤维梁柱单元及其单元参数分析[J].工程力学,2004,21(3):15-20.Nie L Y,Li J Z,Fan L C.Elastic-plastic fiber beam-column element and its parametric analysis[J].Engi-neering Mechanics,2004,21(3):15-20.
[17]吕西林,卢文生.纤维杆元模型在框架结构非线性分析中的应用[J].力学季刊,2006,27(1):14-22.LüX L,Lu W S.Application of fiber line elementmodel in nonlinear analysis of frame structures[J].Chinese Quarterly of Mechanics,2006,27(1):14-22.
[18]Wilson E L,Yuan M W,Dickens J M.Dynamic anal-ysis by direct superposition of Ritz vectors[J].Earth-quake Engineering and Structural Dynamics,1982,10(6):813-823.[19]GB 50011-2001,建筑抗震设计规范[S].
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