复合钢管混凝土轴压短柱非线性有限元分析
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摘要
基于ABAQUS非线性有限元软件建立了外方内圆复合钢管混凝土轴压短柱的有限元模型,并进行了短柱受轴向荷载作用下的有限元模拟,轴压极限承载力和荷载-变形曲线的数值计算结果与相应的试验实测结果吻合较好.受压时,方形和圆形钢管分别对核心混凝土产生约束作用,使得复合钢管混凝土柱具有较好的延性和较高的剩余承载力.基于非线性有限元模型,开展了复合钢管混凝土轴压短柱在不同参数下的受力分析.通过试验和理论分析发现,一定壁厚情况下,随着内部圆钢管直径增大,复合钢管混凝土轴压短柱极限承载力和剩余承载力的变化先增大后减小.
FE models of composite-sectioned square concrete filled steel tube(CFST) stub columns were established in this paper.It was found that the calculated axial bearing capacities and load-deformation curves agreed with those of measured data well.The composite-sectioned CFST stub columns had excellent ductility and high residual bearing capacity with the constraint of square and circular steel tubes under compression.The mechanical behaviour of the square and circular steel tubes and core concrete were analysed under compression.The measured and calculated results show that,the increase of bearing capacities of the composite columns changes with the increasing diameter of the inner circular steel tubes,that is,the changes increase at first,then decrease.
FE models of composite-sectioned square concrete filled steel tube(CFST) stub columns were established in this paper.It was found that the calculated axial bearing capacities and load-deformation curves agreed with those of measured data well.The composite-sectioned CFST stub columns had excellent ductility and high residual bearing capacity with the constraint of square and circular steel tubes under compression.The mechanical behaviour of the square and circular steel tubes and core concrete were analysed under compression.The measured and calculated results show that,the increase of bearing capacities of the composite columns changes with the increasing diameter of the inner circular steel tubes,that is,the changes increase at first,then decrease.
引文
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[2]HAN Lin-hai,HE Shan-hu,LIAO Fei-yu.Performanceand calculations of concrete filled steel tubes(CFST)under axial tension[J].Journal of Constructional SteelResearch,2011,67(11):1699-709.
[3]TAO Zhong,UY B,HAN Lin-hai.Nonlinear analysis ofconcrete-filled square stainless steel stub columns underaxial compression[J].Journal of Constructional SteelResearch,2011,67(11):1719-32.
[4]HAN Lin-hai,WANG Wei-hua,YU Hong-xia.Experimental behavior of reinforced concrete(RC)beamto concrete-filled tubular(CFST)column frames subjectedto ISO-834 standard fire[J].Engineering Structures,2010,32(10):3130-144.
[5]吕天启,赵国藩.内圆钢管增强方钢管混凝土偏压极限承载力分析数值方法[J].大连理工大学学报,2001,41(5):612-16.LYU Tian-qi,ZHAO Guo-fan.Numerical method foranalysis of ultimate strength of concrete-filled square steelTubular columns under eccentric compression reinforced byinner circular steel tube[J].Journal of Dalian Universityof Technology,2001,41(5):612-16.(in Chinese)
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[7]马淑芳,郭红香,赵均海,等.复式钢管混凝土偏压柱试验[J].工业建筑,2007,37(12):28-30.MA Shu-fang,GAO Hong-xiang,ZHAO Jun-hai,et al.Experiment investigation on multibarrel tube-confinedconcrete under eccentric compression[J].IndustrialConstruction,2007,37(12):28-30.(in Chinese)
[8]裴万吉.复式钢管混凝土柱力学性能研究[D].西安:长安大学建筑工程学院,2005.PEI Wan-ji.Research on mechanical performance ofmultibarrel tube-confined concrete columns[J].Xi'an:School of Civil Engineering,Chang'an University,2005.(in Chinese)
[9]张扬,钱稼茹,纪晓东,等.内圆外方复合钢管混凝土短柱轴压承载力试验研究[J].世界地震工程,2011,27(3):40-46.ZHANG Yang,QIAN Jia-ru,JI Xiao-dong,et al.Experimental study on axial compressive strength ofconcrete filled composite steel tube short columns[J].World Earthquake Engineering,2011,27(3):40-46.(inChinese)
[2]HAN Lin-hai,HE Shan-hu,LIAO Fei-yu.Performanceand calculations of concrete filled steel tubes(CFST)under axial tension[J].Journal of Constructional SteelResearch,2011,67(11):1699-709.
[3]TAO Zhong,UY B,HAN Lin-hai.Nonlinear analysis ofconcrete-filled square stainless steel stub columns underaxial compression[J].Journal of Constructional SteelResearch,2011,67(11):1719-32.
[4]HAN Lin-hai,WANG Wei-hua,YU Hong-xia.Experimental behavior of reinforced concrete(RC)beamto concrete-filled tubular(CFST)column frames subjectedto ISO-834 standard fire[J].Engineering Structures,2010,32(10):3130-144.
[5]吕天启,赵国藩.内圆钢管增强方钢管混凝土偏压极限承载力分析数值方法[J].大连理工大学学报,2001,41(5):612-16.LYU Tian-qi,ZHAO Guo-fan.Numerical method foranalysis of ultimate strength of concrete-filled square steelTubular columns under eccentric compression reinforced byinner circular steel tube[J].Journal of Dalian Universityof Technology,2001,41(5):612-16.(in Chinese)
[6]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:自然科学版,2005,45(12):1596-99.WANG Zhi-hao,CHENG Rong.Axial bearing capacity ofcomposite-sectioned square concrete-filled steel tubes[J].Journal of Tsinghua University:Science and TechnologyEdition,2005,45(12):1596-99.(in Chinese)
[7]马淑芳,郭红香,赵均海,等.复式钢管混凝土偏压柱试验[J].工业建筑,2007,37(12):28-30.MA Shu-fang,GAO Hong-xiang,ZHAO Jun-hai,et al.Experiment investigation on multibarrel tube-confinedconcrete under eccentric compression[J].IndustrialConstruction,2007,37(12):28-30.(in Chinese)
[8]裴万吉.复式钢管混凝土柱力学性能研究[D].西安:长安大学建筑工程学院,2005.PEI Wan-ji.Research on mechanical performance ofmultibarrel tube-confined concrete columns[J].Xi'an:School of Civil Engineering,Chang'an University,2005.(in Chinese)
[9]张扬,钱稼茹,纪晓东,等.内圆外方复合钢管混凝土短柱轴压承载力试验研究[J].世界地震工程,2011,27(3):40-46.ZHANG Yang,QIAN Jia-ru,JI Xiao-dong,et al.Experimental study on axial compressive strength ofconcrete filled composite steel tube short columns[J].World Earthquake Engineering,2011,27(3):40-46.(inChinese)
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