超级巨柱的弹塑性受力特性及其简化模型
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摘要
目的研究了巨型柱弹塑性受力特点及其简化计算模型,以解决某超高层建筑中最大截面面积达20m2的超级巨柱难以甚至无法较好地通过现有试验设备进行试验研究的现实问题.方法采用MSC.MARC有限元软件建立巨型柱的精细化模型,给出分析其受力性能的具体实施方案;考察巨型柱对von Mises准则和Drucker-Prager准则差别的敏感性,分析其弹塑性受力特性和相应变化规律;提出简化巨型柱模型的建模途径,并与精细化模型计算结果相对比.结果巨型柱受力性能对不同屈服准则敏感性弱,约束对变形能力有一定影响,工程意义上可以忽略;简化模型与精细模型的计算结果吻合情况较好,合理、易行.结论巨型柱简化分析模型可供整体结构的地震倒塌模拟参考.
Mega-columns with a solid section area of nearly 20m2 are used in super high-rise buildings.However,their fundamental mechanical behaviors are very difficult to be studied with current experiment equipments and technology.In order to solve this problem,this paper discusses the elasto-plastic behavior of the mega-columns and establishes the corresponding simplified models.Firstly,detailed finite element models of the mega-columns are built up with solid elements based on the general-purpose finite element program-MSC.MARC.Typical load cases are applied on the detailed FE model.Then,the influences of two widely used yield criteria(von Mises criterion and Drucker-Prager criterion)of concrete are discussed.The comparisons indicate that the mechanical characters of the mega-columns are not sensitive to the yield criteria,and the confinement will have some influence on the deformation capacity.However such differences can be ignored in practical use.The methodology to build up the simplified models of the mega-columns is presented and the results of the simplified model agree well with the results of the detailed FE model.The workload of the simplified model is much smaller than the detailed FE model.So it can be used in global structural elasto-plastic analysis and collapse simulation.
Mega-columns with a solid section area of nearly 20m2 are used in super high-rise buildings.However,their fundamental mechanical behaviors are very difficult to be studied with current experiment equipments and technology.In order to solve this problem,this paper discusses the elasto-plastic behavior of the mega-columns and establishes the corresponding simplified models.Firstly,detailed finite element models of the mega-columns are built up with solid elements based on the general-purpose finite element program-MSC.MARC.Typical load cases are applied on the detailed FE model.Then,the influences of two widely used yield criteria(von Mises criterion and Drucker-Prager criterion)of concrete are discussed.The comparisons indicate that the mechanical characters of the mega-columns are not sensitive to the yield criteria,and the confinement will have some influence on the deformation capacity.However such differences can be ignored in practical use.The methodology to build up the simplified models of the mega-columns is presented and the results of the simplified model agree well with the results of the detailed FE model.The workload of the simplified model is much smaller than the detailed FE model.So it can be used in global structural elasto-plastic analysis and collapse simulation.
引文
[1]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析[M].北京:中国建筑工业出版社,2009.(Lu Xinzheng,Ye Lieping,Miao Zhiwei.Elasto-plastic analysis of buildings against earthquake[M].Beijing:China Architecture&Building Press,2009.)
[2]韩林海,冯九斌.混凝土的本构关系模型及其在钢管混凝土数值分析中的应用[J].哈尔滨建筑大学学报,1995,28(5):26-31.(Han Linhai,Feng Jiubin.Constitutive relations ofconcrete and its applications in the integral analysisof concrete filled steel tube[J].Journal of Harbin U-niversity of Civil Engineering and Architecture,1995,28(5):26-31.)
[3]L啨geron F,Paultre P.Uniaxial confinement model fornormal and high-strength concrete columns[J].Jour-nal of Structural Engineering,ASCE,2003,129(2):241-252.
[4]Esmaeily A,Xiao Y.Behavior of reinforced concretecolumns under variable axial loads:analysis[J].ACIStructural Journal,2005,102(5):736-744.
[5]Mander J B,Priestley M J N,Park R.The oreticalstress-strain model for confined concrete[J].Journalof Structural Engineering,ASCE,1988,114(8):1804-1825.
[6]江见鲸.关于钢筋混凝土数值分析中的本构关系[J].力学进展,1994,24(1):117-123.(Jiang Jianjing.Constitutive relations for numericalanalysis of reinforced concrete[J].Advances in Me-chanics,1994,24(1):117-123.)
[7]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.(Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite ele-ments analysis of concrete structures[M].Beijing:Tsinghua University Press,2005.)
[8]Meguro K,Hakuno M.Fracture analyses of concretestructures by the modified distinct element method[J].Structural Engineering/Earthquake Engineer-ing,1989,6(2):283-294.
[9]Meguro Kimiro,Hakuno Motohiko.Application ofthe extended distinct element method for collapsesimulation of a double-deck bridge[J].StructuralEngineering/Earthquake Engineering,1994,10(4):175-185.
[10]L啨geron F,Paultre P,Mazar J.Damage mechanicsmodeling of nonlinear seismic behavior of concretestructures[J].Journal of Structural Engineering,ASCE,2005,131(6):946-954.
[11]宣纲,顾祥林,吕西林.强震作用下混凝土框架结构倒塌过程的数值分析[J].地震工程与工程振动,2003,23(6):24-30.(Xuan Gang,Gu Xianglin,Lu Xiling.Numerical a-nalysis of collapse process for RC frame structuressubjected to strong earthquakes[J].Earthquake En-gineering and Engineering Vibration,2003,23(6):24-30.)
[12]秦东,范立础.钢筋混凝土结构倒塌全过程数值模拟[J].同济大学学报,2001,29(1):80-84.(Qin Dong,Fan Lichu.Numerical simulation on col-lapse process of reinforced concrete structures[J].Journal of Tongji University,2001,29(1):80-84.)
[13]Hakuno Mot Ohiko,Meguro Kimiro.Simulation ofconcrete-frame collapse due to dynamic loading[J].Journal of Engineering Mechanics,ASCE,1993,119(9):1709-1723.
[14]林旭川,陆新征,缪志伟,等.基于分层壳单元的RC核心筒结构有限元分析和工程应用[J].土木工程学报,2009,42(3):49-54.(Lin Xuchuan,Lu Xinzheng,Miao Zhiwei,et al.Fi-nite element analysis and engineering application ofRC core-tube structures based on the multi-layershell elements[J].China Civil Engineering Journal,2009,42(3):49-54.)
[15]Miao Zhiwei,Lu Xinzheng,Jiang Jianjing,et al.Nonlinear FE model for RC shear walls based onmulti-layer shell element and microplane constitutivemodel[C]//Proc.Computational Methods in Engi-neering And Science.Sanya,Hainan,China:Tsing-hua University Press&Spring-Verlag,2006.
[2]韩林海,冯九斌.混凝土的本构关系模型及其在钢管混凝土数值分析中的应用[J].哈尔滨建筑大学学报,1995,28(5):26-31.(Han Linhai,Feng Jiubin.Constitutive relations ofconcrete and its applications in the integral analysisof concrete filled steel tube[J].Journal of Harbin U-niversity of Civil Engineering and Architecture,1995,28(5):26-31.)
[3]L啨geron F,Paultre P.Uniaxial confinement model fornormal and high-strength concrete columns[J].Jour-nal of Structural Engineering,ASCE,2003,129(2):241-252.
[4]Esmaeily A,Xiao Y.Behavior of reinforced concretecolumns under variable axial loads:analysis[J].ACIStructural Journal,2005,102(5):736-744.
[5]Mander J B,Priestley M J N,Park R.The oreticalstress-strain model for confined concrete[J].Journalof Structural Engineering,ASCE,1988,114(8):1804-1825.
[6]江见鲸.关于钢筋混凝土数值分析中的本构关系[J].力学进展,1994,24(1):117-123.(Jiang Jianjing.Constitutive relations for numericalanalysis of reinforced concrete[J].Advances in Me-chanics,1994,24(1):117-123.)
[7]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005.(Jiang Jianjing,Lu Xinzheng,Ye Lieping.Finite ele-ments analysis of concrete structures[M].Beijing:Tsinghua University Press,2005.)
[8]Meguro K,Hakuno M.Fracture analyses of concretestructures by the modified distinct element method[J].Structural Engineering/Earthquake Engineer-ing,1989,6(2):283-294.
[9]Meguro Kimiro,Hakuno Motohiko.Application ofthe extended distinct element method for collapsesimulation of a double-deck bridge[J].StructuralEngineering/Earthquake Engineering,1994,10(4):175-185.
[10]L啨geron F,Paultre P,Mazar J.Damage mechanicsmodeling of nonlinear seismic behavior of concretestructures[J].Journal of Structural Engineering,ASCE,2005,131(6):946-954.
[11]宣纲,顾祥林,吕西林.强震作用下混凝土框架结构倒塌过程的数值分析[J].地震工程与工程振动,2003,23(6):24-30.(Xuan Gang,Gu Xianglin,Lu Xiling.Numerical a-nalysis of collapse process for RC frame structuressubjected to strong earthquakes[J].Earthquake En-gineering and Engineering Vibration,2003,23(6):24-30.)
[12]秦东,范立础.钢筋混凝土结构倒塌全过程数值模拟[J].同济大学学报,2001,29(1):80-84.(Qin Dong,Fan Lichu.Numerical simulation on col-lapse process of reinforced concrete structures[J].Journal of Tongji University,2001,29(1):80-84.)
[13]Hakuno Mot Ohiko,Meguro Kimiro.Simulation ofconcrete-frame collapse due to dynamic loading[J].Journal of Engineering Mechanics,ASCE,1993,119(9):1709-1723.
[14]林旭川,陆新征,缪志伟,等.基于分层壳单元的RC核心筒结构有限元分析和工程应用[J].土木工程学报,2009,42(3):49-54.(Lin Xuchuan,Lu Xinzheng,Miao Zhiwei,et al.Fi-nite element analysis and engineering application ofRC core-tube structures based on the multi-layershell elements[J].China Civil Engineering Journal,2009,42(3):49-54.)
[15]Miao Zhiwei,Lu Xinzheng,Jiang Jianjing,et al.Nonlinear FE model for RC shear walls based onmulti-layer shell element and microplane constitutivemodel[C]//Proc.Computational Methods in Engi-neering And Science.Sanya,Hainan,China:Tsing-hua University Press&Spring-Verlag,2006.
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