分散式钢棒混凝土柱非线性数值模拟研究
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摘要
针对实腹式型钢混凝土柱施工难度大、造价高的特点,文中基于核心区钢骨含钢量相同的原则给出了一种低工程造价、低施工难度的分散式钢棒核心钢骨混凝土柱,初步试验已验证两种柱的力学性能相近,该论文则是更深入地研究这种新型截面柱的抗震性能。通过考虑材料本构关系的非线性以及P-Δ效应,应用有限元软件(ABAQUS)建立分散式钢棒核心钢骨混凝土柱的非线性有限元模型,开展轴压比、含钢率、混凝土强度以及核心钢棒屈服强度等对分散式钢棒核心钢骨混凝土柱荷载位移曲线、水平极限承载力及延性系数影响的研究,结果表明:分散式钢棒核心钢骨混凝土柱水平极限承载力受轴压比和混凝土强度的影响明显,而含钢率和核心钢棒屈服强度对水平极限承载力影响很小;延性系数是一个比较敏感的指标,受各种因素的影响均较明显。
Because of the SRC column are difficult to construct and the high cost,the new SRC cross-section of distributed steel bar with low cost is proposed based on the principle of which the same core steel ratio.The two types columns has been validated similar mechanical properties by the preliminary tests,and more in-depth study of the seismic performance of this new cross-section column is presented.Considering the nonlinearity of the materials and the appearance of P-Δ,analysis models of SRC of distributed steel bar core section with FEM's software are built.Parameters of axial compression ratio,the core steel ratio,the strength of concrete and core steel bar which influence the P-Δcurves,horizontal ultimate load and ductility coefficients were analyzed for further study of the new SRC section.The conclusion is as follows: the horizontal ultimate load of new SRC cross-section of distributed steel bar was obvious influenced by the axial compression ratio and strength of concrete and less affected by the core steel ratio and the strength of the core steel bar;ductility coefficients which was obvious influenced by many factors is a sensitive indicator.
Because of the SRC column are difficult to construct and the high cost,the new SRC cross-section of distributed steel bar with low cost is proposed based on the principle of which the same core steel ratio.The two types columns has been validated similar mechanical properties by the preliminary tests,and more in-depth study of the seismic performance of this new cross-section column is presented.Considering the nonlinearity of the materials and the appearance of P-Δ,analysis models of SRC of distributed steel bar core section with FEM's software are built.Parameters of axial compression ratio,the core steel ratio,the strength of concrete and core steel bar which influence the P-Δcurves,horizontal ultimate load and ductility coefficients were analyzed for further study of the new SRC section.The conclusion is as follows: the horizontal ultimate load of new SRC cross-section of distributed steel bar was obvious influenced by the axial compression ratio and strength of concrete and less affected by the core steel ratio and the strength of the core steel bar;ductility coefficients which was obvious influenced by many factors is a sensitive indicator.
引文
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[6]QI Hongtuo,GUO Lanhui.Axial load behavior andstrength of tubed steel reinforced-concrete(SRC)stubcolumns[J].Thin-Walled Structures,2011,(49):1141-1150.
[7]HAN Linhai,WANG Wenda,ZHAO Xiaoling.Behaviourof steel beam to concrete-lled SHS column frames:Fi-nite element model and verications[J].EngineeringStructures,2008(30):1647-1658.
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[9]赵松林,彭水利,皮音培,等.分散式钢棒混凝土柱抗震性能对比试验研究[J].建筑结构,2012,42(6):95-98.
[10]中国建筑科学研究院.JGJ138-2001型钢混凝土组合结构技术规程[S].北京:中国建筑工业出版社,2001.
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[12]ABAQUS Inc.ABAQUS theory manual and user manu-als,Version 6.5[R].Providence,R.I.:ABAQUSInc.,2004.
[13]MANDER J B,PRIESTLEY M J N,Park.Theoreticalstress-stain model for confined concrete[J].J Struct.Eng,1988,114(8):1804-1826.
[14]卢方伟,李四平,孙国钧,等.方钢管混凝土轴压短柱的非线性有限元分析[J].工程力学,2007,24(3):110-114.
[15]周明华.土木工程结构试验与检测[M].南京:东南大学出版社,2002.
[16]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003.
[17]贾金青,赵国藩.高强混凝土框架短柱力学性能的试验研究[J].建筑结构学报,2001,22(3):43-47.
[2]中日联合考察团,周福霖,崔鸿超,等.东日本大地震灾害考察报告[J].建筑结构,2012,42(4):1-20.
[3]刘阳,郭子雄,欧阳文俊,等.核心型钢混凝土柱抗震性能及轴压比限值试验研究[J].土木工程学报,2010(6):57-66.
[4]蔡健,梁伟盛,林辉.方钢管混凝土柱抗剪性能试验研究[J].深圳大学学报理工版,2012,29(3):189-194.
[5]张春梅,周云,阴毅.钢-混凝土组合柱轴压性能的实验对比研究[J].中山大学学报:自然科学版,2004,43(2):46-49
[6]QI Hongtuo,GUO Lanhui.Axial load behavior andstrength of tubed steel reinforced-concrete(SRC)stubcolumns[J].Thin-Walled Structures,2011,(49):1141-1150.
[7]HAN Linhai,WANG Wenda,ZHAO Xiaoling.Behaviourof steel beam to concrete-lled SHS column frames:Fi-nite element model and verications[J].EngineeringStructures,2008(30):1647-1658.
[8]卜楠楠.国贸三期钢骨混凝土组合结构施工技术[J].施工技术,2010,39(10):89-92.
[9]赵松林,彭水利,皮音培,等.分散式钢棒混凝土柱抗震性能对比试验研究[J].建筑结构,2012,42(6):95-98.
[10]中国建筑科学研究院.JGJ138-2001型钢混凝土组合结构技术规程[S].北京:中国建筑工业出版社,2001.
[11]中国建筑科学研究院.GB50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.
[12]ABAQUS Inc.ABAQUS theory manual and user manu-als,Version 6.5[R].Providence,R.I.:ABAQUSInc.,2004.
[13]MANDER J B,PRIESTLEY M J N,Park.Theoreticalstress-stain model for confined concrete[J].J Struct.Eng,1988,114(8):1804-1826.
[14]卢方伟,李四平,孙国钧,等.方钢管混凝土轴压短柱的非线性有限元分析[J].工程力学,2007,24(3):110-114.
[15]周明华.土木工程结构试验与检测[M].南京:东南大学出版社,2002.
[16]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003.
[17]贾金青,赵国藩.高强混凝土框架短柱力学性能的试验研究[J].建筑结构学报,2001,22(3):43-47.
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