矩形中空夹层再生混凝土钢管短柱轴压试验研究
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摘要
以截面形式、截面长宽比和混凝土类型为参数共设计了8根矩形中空夹层钢管混凝土试件,对其进行轴压实验并对其破坏形态、荷载-纵向应变关系曲线及外钢管横向应变发展规律进行分析。其中截面形式包括矩形套矩形和矩形套圆形两种,截面长宽比分别为1.25和1.5,混凝土类型包括普通混凝土和再生混凝土(再生粗骨料取代率为50%)两类。结果表明:对于截面形式相同的试件,长宽比较大者极限承载力更小,且其长边横向应变发展更快;对于长宽比相同的试件,矩形套矩形截面的试件长边横向应变发展比矩形套圆形截面的更快;混凝土类型对试件的极限承载力和破坏形态影响不大。最后运用有限元软件ABAQUS对8根短柱的轴压全过程进行模拟,并将有限元计算得到荷载-纵向应变曲线与实验实测曲线进行对比,两者吻合较好且互相验证。
Taking cross section form,section length-width ratio and concrete type as parameters,8rectangular concrete-filled double-skin steel tube specimens were designed. Axial compression experiment was carried out to study their failure mode,load-longitudinal strain curve and lateral strain development of outer steel tube.The cross section form includes 2kinds,namely,both outer and internal rectangular casing tube and rectangular outer and circular internal casing tube,respectively;the cross section length-width ratio is 1.25 and 1.5,respectively;concrete type includes 2kinds,namely,common concrete and recycled concrete with 50%recycled coarse aggregate substitution rate,respectively.Experimental results show that for specimens with same cross section,the ultimate bearing capacity of specimens with larger length-width ratio is smaller,and its lateral strain development is faster;for specimens with same length-width ratio,the lateral strain development of both outer and internal rectangular casing tube is faster than that of rectangular outer and circular internal casing tube;the influence of concrete type on specimen's ultimate bearing capacity and failure mode is not obvious.Finally,numerical simulation of 8short columns axial compression process was carried out based on ABAQUS finite element method.The comparison between calculated loadlongitudinal strain curve and experimentally obtained curve indicates that both curves are in good agreement and can be mutual authentication.
Taking cross section form,section length-width ratio and concrete type as parameters,8rectangular concrete-filled double-skin steel tube specimens were designed. Axial compression experiment was carried out to study their failure mode,load-longitudinal strain curve and lateral strain development of outer steel tube.The cross section form includes 2kinds,namely,both outer and internal rectangular casing tube and rectangular outer and circular internal casing tube,respectively;the cross section length-width ratio is 1.25 and 1.5,respectively;concrete type includes 2kinds,namely,common concrete and recycled concrete with 50%recycled coarse aggregate substitution rate,respectively.Experimental results show that for specimens with same cross section,the ultimate bearing capacity of specimens with larger length-width ratio is smaller,and its lateral strain development is faster;for specimens with same length-width ratio,the lateral strain development of both outer and internal rectangular casing tube is faster than that of rectangular outer and circular internal casing tube;the influence of concrete type on specimen's ultimate bearing capacity and failure mode is not obvious.Finally,numerical simulation of 8short columns axial compression process was carried out based on ABAQUS finite element method.The comparison between calculated loadlongitudinal strain curve and experimentally obtained curve indicates that both curves are in good agreement and can be mutual authentication.
引文
[1]韩林海,杨有福.矩形钢管混凝土轴心受压构件强度承载力的试验研究[J].土木工程学报,2001,34(4):22-31(HAN Lin-hai,YANG You-fu.Study on axial bearing capacity of concrete-filled-steel-tube columns with rectangular section[J].China Civil Engineering Journal,2001,34(4):22-31(in Chinese))
[2]陶忠,端华飞,韩林海.矩形中空夹层钢管混凝土力学性能的初步研究[C].哈尔滨工业大学学报(中国钢结构协会钢-混凝土组合结构分会第十次年会论文集),2005,37(增刊):113-116(TAO Zhong,DUAN Hua-fei,HAN Lin-hai.Preliminary investigation into behavior of beam-columns of concrete filled double skin rectangular hollow sections[C].Journal of Harbin Institute of Technology(Proceedings of the tenth Annual Meeting of China Steel Construction Society Association for Steel-Concrete Composite Structures),2005,37(Sup.):113-116(in Chinese))
[3]谢力,陈梦成,黄宏.矩形中空夹层钢管混凝土轴压构件的试验研究[J].工业建筑,2013,43(5):128-131(XIE Li,CHEN Meng-cheng,HUANG Hong.Experimental study on rectangular concrete-filled double-skin steel tubes subjected to eccentric compressive load[J].Industrial Construction,2013,43(5):128-131(in Chinese))
[4]邱慈长,王清远,石宵爽等.薄壁钢管再生混凝土轴压实验研究[J].实验力学,2011,26(1):8-15(QIU Cichang,WANG Qing-yuan,SHI Xiao-shuang,et al.Experimental investigation on the behavior of recycle concrete-filled thin-walled steel tube under axial compression[J].Journal of Experimental Mechanics,2011,26(1):8-15(in Chinese))
[5]吴波,刘伟,刘琼祥等.钢管再生混合短柱的轴压性能试验[J].土木工程学报,2010,43(2):32-38(WU Bo,LIU Wei,LIU Qiong-xiang,et al.Experimental study on the behavior of recycled-concrete-segment/lump filled steel tubular stub columns subjected to concentrically axial load[J].China Civil Engineering Journal,2010,43(2):32-38(in Chinese))
[6]Yang Y F,Han L H.Experimental behavior of recycled aggregate concrete filled steel tubular columns[J].Journal of Construction Steel Research,2006,62(12):1310-1324.
[7]王玉银,陈杰,纵斌等.钢管再生混凝土与钢筋再生混凝土轴压短柱力学性能对比试验研究[J].建筑结构学报,2011,32(12):170-177(WANG Yu-yin,CHEN Jie,ZONG Bin,et al.Mechanical behavior of axially loaded recycled aggregate concrete filled steel tubular stubs and reinforced recycled aggregate concrete stubs[J].Journal of Building Structures,2011,32(12):170-177(in Chinese))
[8]董江峰,袁书成,侯敏等.中空夹层钢管再生混凝土短柱受压性能分析[J].建筑材料学报,2014,17(4):627-633(DONG Jiang-feng,YUAN Shu-cheng,HOU Min,et al.Mechanical behavior of recycled aggregate concrete filled double skin steel tube columns[J].Journal of Building Materials,2014,17(4):627-633(in Chinese))
[9]黄宏,陈梦成,黄斌洁.圆中空夹层钢管混凝土柱扭转实验研究[J].实验力学,2012,27(3):288-294(HUANG Hong,CHEN Meng-cheng,HUANG Bin-jie.Experimental study of concrete-filled double-skin circular steel tube subjected to pure torsion[J].Journal of Experimental Mechanics,2012,27(3):288-294(in Chinese))
[10]韩林海.钢管混凝土结构-理论与实践(2版)[M].北京:科学出版社,2007(HAN Lin-hai.Concrete-filled steel tubular structure-theory and practice(2nd ed)[M].Beijing:Science Press,2007(in Chinese))
[2]陶忠,端华飞,韩林海.矩形中空夹层钢管混凝土力学性能的初步研究[C].哈尔滨工业大学学报(中国钢结构协会钢-混凝土组合结构分会第十次年会论文集),2005,37(增刊):113-116(TAO Zhong,DUAN Hua-fei,HAN Lin-hai.Preliminary investigation into behavior of beam-columns of concrete filled double skin rectangular hollow sections[C].Journal of Harbin Institute of Technology(Proceedings of the tenth Annual Meeting of China Steel Construction Society Association for Steel-Concrete Composite Structures),2005,37(Sup.):113-116(in Chinese))
[3]谢力,陈梦成,黄宏.矩形中空夹层钢管混凝土轴压构件的试验研究[J].工业建筑,2013,43(5):128-131(XIE Li,CHEN Meng-cheng,HUANG Hong.Experimental study on rectangular concrete-filled double-skin steel tubes subjected to eccentric compressive load[J].Industrial Construction,2013,43(5):128-131(in Chinese))
[4]邱慈长,王清远,石宵爽等.薄壁钢管再生混凝土轴压实验研究[J].实验力学,2011,26(1):8-15(QIU Cichang,WANG Qing-yuan,SHI Xiao-shuang,et al.Experimental investigation on the behavior of recycle concrete-filled thin-walled steel tube under axial compression[J].Journal of Experimental Mechanics,2011,26(1):8-15(in Chinese))
[5]吴波,刘伟,刘琼祥等.钢管再生混合短柱的轴压性能试验[J].土木工程学报,2010,43(2):32-38(WU Bo,LIU Wei,LIU Qiong-xiang,et al.Experimental study on the behavior of recycled-concrete-segment/lump filled steel tubular stub columns subjected to concentrically axial load[J].China Civil Engineering Journal,2010,43(2):32-38(in Chinese))
[6]Yang Y F,Han L H.Experimental behavior of recycled aggregate concrete filled steel tubular columns[J].Journal of Construction Steel Research,2006,62(12):1310-1324.
[7]王玉银,陈杰,纵斌等.钢管再生混凝土与钢筋再生混凝土轴压短柱力学性能对比试验研究[J].建筑结构学报,2011,32(12):170-177(WANG Yu-yin,CHEN Jie,ZONG Bin,et al.Mechanical behavior of axially loaded recycled aggregate concrete filled steel tubular stubs and reinforced recycled aggregate concrete stubs[J].Journal of Building Structures,2011,32(12):170-177(in Chinese))
[8]董江峰,袁书成,侯敏等.中空夹层钢管再生混凝土短柱受压性能分析[J].建筑材料学报,2014,17(4):627-633(DONG Jiang-feng,YUAN Shu-cheng,HOU Min,et al.Mechanical behavior of recycled aggregate concrete filled double skin steel tube columns[J].Journal of Building Materials,2014,17(4):627-633(in Chinese))
[9]黄宏,陈梦成,黄斌洁.圆中空夹层钢管混凝土柱扭转实验研究[J].实验力学,2012,27(3):288-294(HUANG Hong,CHEN Meng-cheng,HUANG Bin-jie.Experimental study of concrete-filled double-skin circular steel tube subjected to pure torsion[J].Journal of Experimental Mechanics,2012,27(3):288-294(in Chinese))
[10]韩林海.钢管混凝土结构-理论与实践(2版)[M].北京:科学出版社,2007(HAN Lin-hai.Concrete-filled steel tubular structure-theory and practice(2nd ed)[M].Beijing:Science Press,2007(in Chinese))