新型加劲防屈曲支撑力学性能有限元分析
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摘要
为保证防屈曲支撑工作性能的稳定性,提出一种新型外围约束机制。通过有限元分析,同时考虑初始缺陷的影响和接触非线性,对防屈曲支撑进行数值模拟,分析其在两种不同形式的加劲布置方式下支撑的力学性能。分析表明,不同的屈曲约束形式对核心构件侧向变形的约束效果不同,从而影响轴向位移的加载幅值和支撑的承载力。基于上述分析,给出防屈曲支撑的外围约束单元的设计建议。
In order to ensure the holistic stability of buckling-restrained braces,it puts forward a kind of innovative periphery restriction mechanism,which enhances its lateral stiffness by setting stiffening on the wall of restriction.Considering the effect of initial limitation and contact nonlinear analysis,with finite element procedure,the buckling-restrained braces were simulated and the mechanical performance of braces under two different collocational quomodo of stiffening was analyzed.By the analysis,different restriction has different restriction degree to lateral displacement of kernel.It can affect the axile displacement and carrying capacity of braces.At last,some design advices to this innovative stiffening of buckling-restrained braces were proposed.
In order to ensure the holistic stability of buckling-restrained braces,it puts forward a kind of innovative periphery restriction mechanism,which enhances its lateral stiffness by setting stiffening on the wall of restriction.Considering the effect of initial limitation and contact nonlinear analysis,with finite element procedure,the buckling-restrained braces were simulated and the mechanical performance of braces under two different collocational quomodo of stiffening was analyzed.By the analysis,different restriction has different restriction degree to lateral displacement of kernel.It can affect the axile displacement and carrying capacity of braces.At last,some design advices to this innovative stiffening of buckling-restrained braces were proposed.
引文
[1]STEPHEN P,TIMOSHENKO,JAMES M G.Theory ofElastic Stability[R].McGraw-Hill l7th Printing,1985.
[2]WATANABE A,HITOMI Y,YAEKI E,et al.Propertiesof Brace Encased in Buckling-Restraining Concrete andSteel Tube[C]∥Proceedings,9th World Conference onEarthquake Engineering.Tokyo-Kyoto,1988:719-724.
[3]尚晓江,邱峰,赵海峰,等.ANSYS有限元高级分析方法与范例应用[M].2版.北京:中国水利水电出版社,2008.
[4]安世亚太.ANSYS结构非线性分析指南[EB/OL].e-works,2007.
[5]刘建彬.防屈曲支撑及防屈曲支撑钢框架设计理论研究[D].北京:清华大学,2005.
[6]李国强.胡宝琳屈曲约束支撑滞回曲线模型和刚度方程的建立[J].地震工程与工程振动,2007,27(2).
[2]WATANABE A,HITOMI Y,YAEKI E,et al.Propertiesof Brace Encased in Buckling-Restraining Concrete andSteel Tube[C]∥Proceedings,9th World Conference onEarthquake Engineering.Tokyo-Kyoto,1988:719-724.
[3]尚晓江,邱峰,赵海峰,等.ANSYS有限元高级分析方法与范例应用[M].2版.北京:中国水利水电出版社,2008.
[4]安世亚太.ANSYS结构非线性分析指南[EB/OL].e-works,2007.
[5]刘建彬.防屈曲支撑及防屈曲支撑钢框架设计理论研究[D].北京:清华大学,2005.
[6]李国强.胡宝琳屈曲约束支撑滞回曲线模型和刚度方程的建立[J].地震工程与工程振动,2007,27(2).
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