消能偏心支撑结构中粘弹性阻尼器的参数优化
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摘要
通过对粘弹性阻尼器的性能与特点以及消能支撑计算模型的分析,建立了粘弹性阻尼器参数优化的计算模型:以粘弹性阻尼材料的储存剪切模量为设计变量;以各层最大层间位移的最大值的控制率和各层耗能梁段最大梁端弯矩的最大值的控制率为约束条件;在考虑结构在罕遇地震下的地震反应以及结构的经济效益的目标下,建立了优化设计的目标函数。文中以设置粘弹性阻尼偏心支撑的五层平面钢框架为例,使用ANSYS软件中的优化设计模块,通过APDL语言编制优化设计程序,建立了参数优化模型,并对该问题进行了优化设计分析;并对偏心支撑结构和消能偏心支撑结构进行了罕遇地震下的时程分析。计算结果表明:ANSYS软件中的优化设计方法稳定可行;消能偏心支撑可以有效地降低结构的地震反应,对顶层位移的最大减小量可达44.96%;耗能梁段梁端弯矩的最大耗能效果达到37.4%,这样可以延缓耗能梁段的屈服时间,从而可以有效地保证结构的整体稳定。
According to the properties and characters of the viscoelastic damper and the analytical method of the model,the parametric optimization design of viscoelastic dampers is brought forward: the storage shear modulus of viscoelastic damping material is design variables;the control rate of the maximum of story drift and the maximum of active beam link'moment is constraint condition;considering of the structure performance of earthquake and the structure cost,the objective function for the optimization design is brought forward.In this paper,a model of a five-story steel frame with the eccentrically and energy dissipation braced is established,which is used the optimization design module in the ANSYS software to analyse the problem of optimization design,and the time-history analysis at the scarce earthquake is carried through in the model of eccentrically braced frame and eccentrically and energy dissipation braced frame.The computed results show that: the methods of optimization design in the ANSYS software are feasible and effective;eccentrically and energy dissipation braced can reduce the earthquake response,the maximal reduce of the displacement can reach 44.96%;and the maximal effect of energy dissipation in the moment of active beam link can reach 37.4%,it also can postpone the yield time of active bean link,so the wholly stability of structure can be ensured effectively.
According to the properties and characters of the viscoelastic damper and the analytical method of the model,the parametric optimization design of viscoelastic dampers is brought forward: the storage shear modulus of viscoelastic damping material is design variables;the control rate of the maximum of story drift and the maximum of active beam link'moment is constraint condition;considering of the structure performance of earthquake and the structure cost,the objective function for the optimization design is brought forward.In this paper,a model of a five-story steel frame with the eccentrically and energy dissipation braced is established,which is used the optimization design module in the ANSYS software to analyse the problem of optimization design,and the time-history analysis at the scarce earthquake is carried through in the model of eccentrically braced frame and eccentrically and energy dissipation braced frame.The computed results show that: the methods of optimization design in the ANSYS software are feasible and effective;eccentrically and energy dissipation braced can reduce the earthquake response,the maximal reduce of the displacement can reach 44.96%;and the maximal effect of energy dissipation in the moment of active beam link can reach 37.4%,it also can postpone the yield time of active bean link,so the wholly stability of structure can be ensured effectively.
引文
[1]申永康,万斌,邵建华.偏心支撑钢框架延性抗震设计探讨[J].工程抗震与加固改造,2007,29(2):47~50Shen Yong-kang,Wan Bin,Shao Jan-hua.Seismic Designon Eccentrically Braced Steel Frame System[J].EarthquakeResistant Engineering and Retrofitting,2007,29(2):47~50
[2]杨扬.设置粘弹性阻尼器偏心支撑结构的性能研究[D].西安:西安建筑科技大学,2005Yang Yang.Research on Behavior of Eccentrically BracedStructures Installing Viscoelastic Damper[D].Xi an:AThesis for the degree of master in Xi an University ofArchitecture and Technology,2005
[3]张琴,楼文娟,陈勇.粘弹性阻尼器位置优化目标函数及实现方法[J].工业建筑,2003,33(6):10~13Zhang Qin,Lou Wen-juan,Chen Yong.Obiective Functionsand Their Implementing Method of Location Optimum ofViscoelastic Damper[J].Industrial Construction,2003,33(6):10~13
[4]周云,徐赵东,赵鸿铁.粘弹性阻尼结构的性能、分析方法及工程应用[J].地震工程与工程振动,1998,18(3):96~107Zhou Yun,Xu Zhao-dong,Zhao Hong-tie,Study onBehavior,Analytical Methods and Application of ViscoelasticStructure[J].Earthquake Engineering and EngineeringVibration,1998,18(3):96~107
[5]邓涛.粘弹性阻尼器减震性能研究与优化分析[D].长沙:湖南大学,2005Deng Tao.The Research on Seismic Behavior and theOptional Analysis of Viscoelastic Dampers[D].Changsha:AThesis for the degree of master in Hunan University,2005
[6]李黎明.ANSYS有限元分析实用教程[M].北京:清华大学出版社,2005,322~339Li Li-ming.The Course of finite element analysis softwareANSYS[M].Beijing:TsingHua University Press,2005,322~339
[2]杨扬.设置粘弹性阻尼器偏心支撑结构的性能研究[D].西安:西安建筑科技大学,2005Yang Yang.Research on Behavior of Eccentrically BracedStructures Installing Viscoelastic Damper[D].Xi an:AThesis for the degree of master in Xi an University ofArchitecture and Technology,2005
[3]张琴,楼文娟,陈勇.粘弹性阻尼器位置优化目标函数及实现方法[J].工业建筑,2003,33(6):10~13Zhang Qin,Lou Wen-juan,Chen Yong.Obiective Functionsand Their Implementing Method of Location Optimum ofViscoelastic Damper[J].Industrial Construction,2003,33(6):10~13
[4]周云,徐赵东,赵鸿铁.粘弹性阻尼结构的性能、分析方法及工程应用[J].地震工程与工程振动,1998,18(3):96~107Zhou Yun,Xu Zhao-dong,Zhao Hong-tie,Study onBehavior,Analytical Methods and Application of ViscoelasticStructure[J].Earthquake Engineering and EngineeringVibration,1998,18(3):96~107
[5]邓涛.粘弹性阻尼器减震性能研究与优化分析[D].长沙:湖南大学,2005Deng Tao.The Research on Seismic Behavior and theOptional Analysis of Viscoelastic Dampers[D].Changsha:AThesis for the degree of master in Hunan University,2005
[6]李黎明.ANSYS有限元分析实用教程[M].北京:清华大学出版社,2005,322~339Li Li-ming.The Course of finite element analysis softwareANSYS[M].Beijing:TsingHua University Press,2005,322~339
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