组合方钢管混凝土短柱轴压力学性能研究
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摘要
方钢管混凝土柱承载力高、延性好、施工速度快,同时具有外形整洁美观、节点相贯简单、构件连接方便等优点,在工程实践中得到了越来越广泛的应用,但是方钢管对混凝土的约束效果不显著,柱的承载力提高有限。针对方钢管混凝土柱的这一缺点,作者设计了一种新型的组合方钢管混凝土柱,从试验和理论两方面深入地研究了此种组合柱轴心受压时的力学性能和工作机理。
通过2根方钢管混凝土短柱和6根组合方钢管混凝土短柱的轴心受压试验,研究方钢管混凝土柱和组合方钢管混凝土柱力学性能的差异以及截面形式、含钢率、混凝土强度和套箍系数等因素对组合柱受力性能的影响规律;对加荷过程中方钢管和混凝土中各种内力的变化进行分析计算,揭示方钢管混凝土柱轴心受压时两种材料的工作机理。
利用有限元分析软件ABAQUS对方钢管混凝土轴压短柱和组合方钢管混凝土轴压短柱的荷载-变形全过程进行计算。计算结果与试验结果吻合较好,表明本文建立的有限元模型可以用于方钢管混凝土柱和组合方钢管混凝土柱的轴心受压计算。用有限元法计算了27根普通方钢管混凝土短柱和27根组合方钢管混凝土短柱的轴心受压承载力,通过对计算结果进行回归分析,得出了方钢管混凝土柱和组合方钢管混凝土柱轴心受压承载力的计算公式。公式计算结果与试验结果吻合较好,且公式形式简单、概念清晰,可为有关工程实践和规程制订提供参考。
The CFSST(concrete-filled square steel tube) has the advantages of high bearing capacity, good ductility, rapid construction speed, regular shape, simple connections between columns and beams. Due to it’s good behaviour, it is used more and more widely in engineering practice. But the confinement effect of square steel tube is not obvious, the bearing capacity of column improves little. In order to overcome the disadvantages of CFSST, a new type composite section CFSST column is designed in this paper. The behaviour and mechanism of this composite section CFSST column under axial load were investigated, including theoretical and experimental studies.
By the axial compress experimentation of two CFSST specimens and six composite section CFSST column, the differences of mechanical properties between CFSST and composite section CFSST and the influence law of section type, steel ratio, strength of concrete and confinement index on the behavior of composite section columns are studied. The internal force of square steel tube and concrete were analyzed and the mechanism of two materials of CFSST were studied under axial load.
Load-deformation curve of CFSST column and composite section CFSST column under axial load was analyzed by ABAQUS, which is a common analysis software of finite element method(FEM). The results of calculation coincide well to experimental data. It shows that the finite elements model established in this paper could be used to calculate the bearing capacity of CFSST column and composite section CFSST column under axial load. Bearing capacity of twenty-seven CFSST and twenty-seven composite section CFSST short column under axial load were calculated by finite element method. The formulas of ultimate axial compressive strength of the column of CFSST and composite section CFSST are obtained form the analysis results. Theoretical results are verified by tests results, and the formulas have clear mechanics concept, simple form, which can supply reliable references to practical engineering and specifications.
通过2根方钢管混凝土短柱和6根组合方钢管混凝土短柱的轴心受压试验,研究方钢管混凝土柱和组合方钢管混凝土柱力学性能的差异以及截面形式、含钢率、混凝土强度和套箍系数等因素对组合柱受力性能的影响规律;对加荷过程中方钢管和混凝土中各种内力的变化进行分析计算,揭示方钢管混凝土柱轴心受压时两种材料的工作机理。
利用有限元分析软件ABAQUS对方钢管混凝土轴压短柱和组合方钢管混凝土轴压短柱的荷载-变形全过程进行计算。计算结果与试验结果吻合较好,表明本文建立的有限元模型可以用于方钢管混凝土柱和组合方钢管混凝土柱的轴心受压计算。用有限元法计算了27根普通方钢管混凝土短柱和27根组合方钢管混凝土短柱的轴心受压承载力,通过对计算结果进行回归分析,得出了方钢管混凝土柱和组合方钢管混凝土柱轴心受压承载力的计算公式。公式计算结果与试验结果吻合较好,且公式形式简单、概念清晰,可为有关工程实践和规程制订提供参考。
The CFSST(concrete-filled square steel tube) has the advantages of high bearing capacity, good ductility, rapid construction speed, regular shape, simple connections between columns and beams. Due to it’s good behaviour, it is used more and more widely in engineering practice. But the confinement effect of square steel tube is not obvious, the bearing capacity of column improves little. In order to overcome the disadvantages of CFSST, a new type composite section CFSST column is designed in this paper. The behaviour and mechanism of this composite section CFSST column under axial load were investigated, including theoretical and experimental studies.
By the axial compress experimentation of two CFSST specimens and six composite section CFSST column, the differences of mechanical properties between CFSST and composite section CFSST and the influence law of section type, steel ratio, strength of concrete and confinement index on the behavior of composite section columns are studied. The internal force of square steel tube and concrete were analyzed and the mechanism of two materials of CFSST were studied under axial load.
Load-deformation curve of CFSST column and composite section CFSST column under axial load was analyzed by ABAQUS, which is a common analysis software of finite element method(FEM). The results of calculation coincide well to experimental data. It shows that the finite elements model established in this paper could be used to calculate the bearing capacity of CFSST column and composite section CFSST column under axial load. Bearing capacity of twenty-seven CFSST and twenty-seven composite section CFSST short column under axial load were calculated by finite element method. The formulas of ultimate axial compressive strength of the column of CFSST and composite section CFSST are obtained form the analysis results. Theoretical results are verified by tests results, and the formulas have clear mechanics concept, simple form, which can supply reliable references to practical engineering and specifications.
引文
[1]姜维山,白国良.配复合箍、螺旋箍、X形钢筋混凝土短柱的抗震性能及抗震设计[J].建筑结构学报,1994,15(1):2-16
[2]叶列平,方鄂华,钢骨混凝土构件的受力性能研究综述[J].土木工程学报,2000,33(5):1-12
[3]顾维平,蔡绍怀,冯文林.钢管高强混凝土的性能与极限强度[J].建筑科学,1991,7(1):23-27
[4]钟善桐.钢管混凝土结构(第三版)[M].清华大学出版社,2003
[5]韩林海,钟善桐.钢管混凝土力学[M].大连理工大学出版社, 1995
[6] Lie T.T. and Kodur V.K.R. Fire resistance of circular steel columns filled with bar-reinforced concrete[J]. Journal of Structural Engineering, ASCE 1996, 122(7):776-782
[7]张克波,夏桂云,张建仁.钢管混凝土轴心受压承载力计算[J],长沙交通学院学报,2002,18(2):47-51
[8] ENV 1994-1-1:1992 Euro code 4[S]. Design of composite steel and concrete structures, part 1.1: general rules and rules for buildings. British Standard Institution, London, 1992
[9]富井政英,雄治吉村.轴心荷载作用下钢管混凝土短柱的试验研究[C].《钢管混凝土结构译文集》.哈尔滨建筑工程学院工程结构研究室.1981.10
[10]韩林海、杨有福.钢管混凝土结构[M].科学出版社.2004
[11]钟善桐.高层钢管混凝土结构[M].黑龙江科学技术出版社,1994: 1-15
[12] Furlong R.W. Strength of steel encased concrete beam columns[J]. Journal of the structural division,ASCE.1967,93(st5):113-124
[13] Sakino K, Tomii M, Watanabe K. Sustaining load capacity of plain concrete stub columns confined by circular steel tubes[J]. Proceedings of the International Specialty Conference on Concrete-Filled Steel Tubular Structures, ASCCS. Harbin, China, 1985
[14]张正国.方钢管混凝土轴压短柱在短期一次静载下的基本性能研究[D].郑州工学院研究生毕业论文.1984年6月
[15]荆树英,郑小庆,朱金铨.方形厚壁钢管混凝土短柱受力性能的研究[J].工业建筑.1989年第11期
[16]李四平.方钢管混凝土偏压柱承载力的研究[D].郑州工学院研究生毕业论文.1992.6
[17]王菁,关罡等.方钢管混凝土轴压柱承载力的计算[J].建筑结构.1997(5):13-15
[18] Matsui C. Local buckling of concrete filled steel square tubular columns[J]. In: Symposium papers. International Association for Bridge and Structural Engineering Conference. Luxembourg, 1993. 269-276
[19] Song J Y, Kwon Y B. Structural behavior of concrete-filled steel box sections[J]. International Conference Report on Composite Construction-Conventional and Innovative. Innsbruck, Austria, 1997. 795-800
[20] Knowles P R. Composite steel and concrete construction[M]. John Wiley and Sons Inc., New York, U. S. A
[21] Schneider S P. Axially loaded concrete-filled steel tubes[J]. Journal of Structural Engineering, 1998, 124(10):1125-1138
[22] Uy B. Local and post-local buckling of concrete-filled steel welded box columns[J]. Journal of Constructional Steel Research, 1998, 47:47-72
[23]吕西林,余勇,陈以一,Tanak K,Sasaki S.轴心受压方钢管混凝土短柱的性能研究: I试验[J].建筑结构, 1999,10: 41-43
[24]余勇,吕西林,Tanaka K.轴心受压方钢管混凝土短柱的性能研究:II分析[J].建筑结构,2000,30-46
[25]张素梅,周明.方钢管约束下混凝土的抗压强度[J].哈尔滨建筑大学学报增刊,1999,(3):14-18
[26]叶再利.方形、矩形钢管高强混凝土轴压短柱基本力学性能研究[D].哈尔滨工业大学,2001
[27]陶忠.方钢管混凝土构件力学性能若干关键问题的研究[D].哈尔滨工业大学,2001
[28] Campione G, Scibilia N. Beam-column behavior of concrete filled steel tubes [J].Steel and Composite Structures, 2002, 2(4):259-276
[29] Shanmugam,E, Lakshmi,B An analytical model for thin-walled steel box columns with concrete-fill [J].Engineering Structures, 2002, 24(6):825-838
[30]李斌,陈刚花.方钢管高强混凝土偏压短柱试验研究[J].西安建筑科技大学学报. 2006,8: 41-43
[31] Huang C S, Yeh Y K, Liu G Y, et al. Axial load behavior of stiffened concrete-filled steel columns[J]. Journal of Structural Engineering, 2002, 128(9):1222-1230
[32]朱美春.钢骨-方钢管自密实高强混凝土柱力学性能研究[D].大连理工大学硕士学位论文,2005
[33]王志浩,成戎.复合方钢管混凝土短柱的轴压承载力[J].清华大学学报,2005,45(12)1596-1612
[34]张耀春,陈勇.设直肋方形薄壁钢管混凝土短柱的试验研究与有限元分析[J].建筑结构学报,2006,27(5):16-22
[35]陈勇,张耀春.设对拉片方形薄壁钢管混凝土短柱的试验研究与有限元分析[J].建筑结构学报,2006,27(5):23-29
[36]蔡健,何振强.带约束拉杆矩形钢管混凝土短轴压性能的试验[J].工业建筑,2007(37):75-80
[37] F.柏拉希.金属结构的屈曲强度[M].科学出版社.1965年4月(中译本)
[38]过镇海.混凝土的强度和本构关系[M].中国建筑工业出版社,2004
[39]刘威.钢管混凝土局部受压时的工作机理研究[D].福州大学博士学位论文,2005
[40]王文达.钢管混凝土柱-钢梁平面框架力学性能的研究[D].福州大学博士学位论文,2006
[41]蔡绍怀.现代钢管混凝土结构[M].人民交通出版社,1999
[2]叶列平,方鄂华,钢骨混凝土构件的受力性能研究综述[J].土木工程学报,2000,33(5):1-12
[3]顾维平,蔡绍怀,冯文林.钢管高强混凝土的性能与极限强度[J].建筑科学,1991,7(1):23-27
[4]钟善桐.钢管混凝土结构(第三版)[M].清华大学出版社,2003
[5]韩林海,钟善桐.钢管混凝土力学[M].大连理工大学出版社, 1995
[6] Lie T.T. and Kodur V.K.R. Fire resistance of circular steel columns filled with bar-reinforced concrete[J]. Journal of Structural Engineering, ASCE 1996, 122(7):776-782
[7]张克波,夏桂云,张建仁.钢管混凝土轴心受压承载力计算[J],长沙交通学院学报,2002,18(2):47-51
[8] ENV 1994-1-1:1992 Euro code 4[S]. Design of composite steel and concrete structures, part 1.1: general rules and rules for buildings. British Standard Institution, London, 1992
[9]富井政英,雄治吉村.轴心荷载作用下钢管混凝土短柱的试验研究[C].《钢管混凝土结构译文集》.哈尔滨建筑工程学院工程结构研究室.1981.10
[10]韩林海、杨有福.钢管混凝土结构[M].科学出版社.2004
[11]钟善桐.高层钢管混凝土结构[M].黑龙江科学技术出版社,1994: 1-15
[12] Furlong R.W. Strength of steel encased concrete beam columns[J]. Journal of the structural division,ASCE.1967,93(st5):113-124
[13] Sakino K, Tomii M, Watanabe K. Sustaining load capacity of plain concrete stub columns confined by circular steel tubes[J]. Proceedings of the International Specialty Conference on Concrete-Filled Steel Tubular Structures, ASCCS. Harbin, China, 1985
[14]张正国.方钢管混凝土轴压短柱在短期一次静载下的基本性能研究[D].郑州工学院研究生毕业论文.1984年6月
[15]荆树英,郑小庆,朱金铨.方形厚壁钢管混凝土短柱受力性能的研究[J].工业建筑.1989年第11期
[16]李四平.方钢管混凝土偏压柱承载力的研究[D].郑州工学院研究生毕业论文.1992.6
[17]王菁,关罡等.方钢管混凝土轴压柱承载力的计算[J].建筑结构.1997(5):13-15
[18] Matsui C. Local buckling of concrete filled steel square tubular columns[J]. In: Symposium papers. International Association for Bridge and Structural Engineering Conference. Luxembourg, 1993. 269-276
[19] Song J Y, Kwon Y B. Structural behavior of concrete-filled steel box sections[J]. International Conference Report on Composite Construction-Conventional and Innovative. Innsbruck, Austria, 1997. 795-800
[20] Knowles P R. Composite steel and concrete construction[M]. John Wiley and Sons Inc., New York, U. S. A
[21] Schneider S P. Axially loaded concrete-filled steel tubes[J]. Journal of Structural Engineering, 1998, 124(10):1125-1138
[22] Uy B. Local and post-local buckling of concrete-filled steel welded box columns[J]. Journal of Constructional Steel Research, 1998, 47:47-72
[23]吕西林,余勇,陈以一,Tanak K,Sasaki S.轴心受压方钢管混凝土短柱的性能研究: I试验[J].建筑结构, 1999,10: 41-43
[24]余勇,吕西林,Tanaka K.轴心受压方钢管混凝土短柱的性能研究:II分析[J].建筑结构,2000,30-46
[25]张素梅,周明.方钢管约束下混凝土的抗压强度[J].哈尔滨建筑大学学报增刊,1999,(3):14-18
[26]叶再利.方形、矩形钢管高强混凝土轴压短柱基本力学性能研究[D].哈尔滨工业大学,2001
[27]陶忠.方钢管混凝土构件力学性能若干关键问题的研究[D].哈尔滨工业大学,2001
[28] Campione G, Scibilia N. Beam-column behavior of concrete filled steel tubes [J].Steel and Composite Structures, 2002, 2(4):259-276
[29] Shanmugam,E, Lakshmi,B An analytical model for thin-walled steel box columns with concrete-fill [J].Engineering Structures, 2002, 24(6):825-838
[30]李斌,陈刚花.方钢管高强混凝土偏压短柱试验研究[J].西安建筑科技大学学报. 2006,8: 41-43
[31] Huang C S, Yeh Y K, Liu G Y, et al. Axial load behavior of stiffened concrete-filled steel columns[J]. Journal of Structural Engineering, 2002, 128(9):1222-1230
[32]朱美春.钢骨-方钢管自密实高强混凝土柱力学性能研究[D].大连理工大学硕士学位论文,2005
[33]王志浩,成戎.复合方钢管混凝土短柱的轴压承载力[J].清华大学学报,2005,45(12)1596-1612
[34]张耀春,陈勇.设直肋方形薄壁钢管混凝土短柱的试验研究与有限元分析[J].建筑结构学报,2006,27(5):16-22
[35]陈勇,张耀春.设对拉片方形薄壁钢管混凝土短柱的试验研究与有限元分析[J].建筑结构学报,2006,27(5):23-29
[36]蔡健,何振强.带约束拉杆矩形钢管混凝土短轴压性能的试验[J].工业建筑,2007(37):75-80
[37] F.柏拉希.金属结构的屈曲强度[M].科学出版社.1965年4月(中译本)
[38]过镇海.混凝土的强度和本构关系[M].中国建筑工业出版社,2004
[39]刘威.钢管混凝土局部受压时的工作机理研究[D].福州大学博士学位论文,2005
[40]王文达.钢管混凝土柱-钢梁平面框架力学性能的研究[D].福州大学博士学位论文,2006
[41]蔡绍怀.现代钢管混凝土结构[M].人民交通出版社,1999