钢管约束钢筋混凝土柱与型钢混凝土柱滞回性能试验研究
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摘要
进行了3组共6个框架柱的滞回性能试验研究,3组试件分别为钢筋混凝土柱(RC柱)、型钢混凝土柱(SRC柱)与钢管约束钢筋混凝土柱(STRC柱);每组2个试件,包括1个剪跨比λ=3.0的中长柱和1个剪跨比λ=1.5的超短柱。3组试件的截面尺寸、柱子长度和轴力相同,且SRC柱与STRC柱的用钢量相同。试验结果表明,RC与SRC超短柱的变形能力不满足现行抗震规范要求。SRC柱的受弯承载力高于STRC柱,但其变形能力、延性和耗能能力低于STRC柱。STRC短柱中,外包钢管不能有效提高短柱的受剪承载力,但外包钢管对核心混凝土的约束作用有效提高了短柱的延性和变形能力。根据试验结果,建议了STRC超短柱的受剪承载力计算方法,可为工程实践提供参考。
In this paper,6 columns were tested to study the seismic behavior of 3 types of columns including reinforced-concrete(RC) columns,steel reinforced-concrete(SRC) columns and steel-tube reinforced-concrete(STRC) columns.The columns were tested under combined constant axial compression and cyclic lateral loads.Each type of columns consisted of 2 specimens with shear span to depth ratio to be 1.5 and 3.0 respectively.The geometry parameters and axial force of these columns were identical,and steel amount of SRC and STRC columns was the same.The test results indicate that the deformation ability of RC and SRC columns with the shear span to depth ratio 1.5 does not meet the requirement of Chinese code for seismic design.The bending strength and shearing strength of SRC columns are higher than those of STRC columns,but the ductility,deformation ability and energy dissipation ability are opposite.The shearing strength of STRC short column is not obviously improved by the outer steel tube,but the deformation ability and ductility are greatly improved due to the confinement of the steel tube to the core concrete.Based on the experimental results,a design method is proposed to calculate the shear strength of STRC columns.
In this paper,6 columns were tested to study the seismic behavior of 3 types of columns including reinforced-concrete(RC) columns,steel reinforced-concrete(SRC) columns and steel-tube reinforced-concrete(STRC) columns.The columns were tested under combined constant axial compression and cyclic lateral loads.Each type of columns consisted of 2 specimens with shear span to depth ratio to be 1.5 and 3.0 respectively.The geometry parameters and axial force of these columns were identical,and steel amount of SRC and STRC columns was the same.The test results indicate that the deformation ability of RC and SRC columns with the shear span to depth ratio 1.5 does not meet the requirement of Chinese code for seismic design.The bending strength and shearing strength of SRC columns are higher than those of STRC columns,but the ductility,deformation ability and energy dissipation ability are opposite.The shearing strength of STRC short column is not obviously improved by the outer steel tube,but the deformation ability and ductility are greatly improved due to the confinement of the steel tube to the core concrete.Based on the experimental results,a design method is proposed to calculate the shear strength of STRC columns.
引文
[1]ZHANG Sumei,LIU Jiepeng.Seismic behavior andstrength of square tube confined reinforced-concrete(STRC)columns[J].Journal of Constructional SteelResearch,2007,63(9):1194-1207.
[2]张国军,吕西林,白国良.周期反复荷载作用下高轴压比框架柱抗震性能的试验研究[J].地震工程与工程振动,2005,25(6):70-75.
[3]姜维山,白国良.配复合箍、螺旋箍、X形筋钢筋砼短柱的抗震性能及抗震设计[J].建筑结构学报,1994,15(1):2-16.
[4]张国军,吕西林.高轴压比高强混凝土短柱力学性能的试验研究[J].工业建筑,2005,35(3):20-23.
[5]刘界鹏.钢管约束钢筋混凝土和型钢混凝土构件静动力性能研究[D].哈尔滨:哈尔滨工业大学,2006.
[6]李俊华,王新堂,薛建阳,等.低周反复荷载下型钢高强混凝土柱受力性能试验研究[J].土木工程学报,2007,40(7):11-18.
[7]赵鸿铁,张素梅.组合结构设计原理[M].北京:高等教育出版社,2005.
[8]Tomii M,Sakino K,Xiao Y,Watanabe K.Earthquakeresisting hysteretic behavior of reinforced concrete shortcolumns confined by steel tube[C]//Proceeding of theInternational Speciality Conference on Concrete Filled SteelTubular Structures.China:Harbin,1985:119-125.
[9]Xiao Y,Tomii M,Sakion K.Experimental study on designmethod to prevent shear failure of reinforced concrete shortcircular columns by confining in steel tube[J].Transactions of Japan Concrete Institute,1986,8:535-542.
[10]肖岩,郭玉荣,何文辉,等.局部加劲钢套管加固钢筋混凝土柱的研究[J].建筑结构学报,2003,24(6):79-86.
[11]GB 50011—2001建筑抗震设计规范[S].
[12]GB 50010—2002混凝土结构设计规范[S].
[2]张国军,吕西林,白国良.周期反复荷载作用下高轴压比框架柱抗震性能的试验研究[J].地震工程与工程振动,2005,25(6):70-75.
[3]姜维山,白国良.配复合箍、螺旋箍、X形筋钢筋砼短柱的抗震性能及抗震设计[J].建筑结构学报,1994,15(1):2-16.
[4]张国军,吕西林.高轴压比高强混凝土短柱力学性能的试验研究[J].工业建筑,2005,35(3):20-23.
[5]刘界鹏.钢管约束钢筋混凝土和型钢混凝土构件静动力性能研究[D].哈尔滨:哈尔滨工业大学,2006.
[6]李俊华,王新堂,薛建阳,等.低周反复荷载下型钢高强混凝土柱受力性能试验研究[J].土木工程学报,2007,40(7):11-18.
[7]赵鸿铁,张素梅.组合结构设计原理[M].北京:高等教育出版社,2005.
[8]Tomii M,Sakino K,Xiao Y,Watanabe K.Earthquakeresisting hysteretic behavior of reinforced concrete shortcolumns confined by steel tube[C]//Proceeding of theInternational Speciality Conference on Concrete Filled SteelTubular Structures.China:Harbin,1985:119-125.
[9]Xiao Y,Tomii M,Sakion K.Experimental study on designmethod to prevent shear failure of reinforced concrete shortcircular columns by confining in steel tube[J].Transactions of Japan Concrete Institute,1986,8:535-542.
[10]肖岩,郭玉荣,何文辉,等.局部加劲钢套管加固钢筋混凝土柱的研究[J].建筑结构学报,2003,24(6):79-86.
[11]GB 50011—2001建筑抗震设计规范[S].
[12]GB 50010—2002混凝土结构设计规范[S].
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