型钢混凝土L形柱-混凝土梁框架节点滞回性能试验研究
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摘要
为研究型钢混凝土L形柱-混凝土梁框架节点的滞回性能,以柱截面配钢形式、轴压比、水平加载角度及有无楼板参与工作为变化参数,进行4个平面和7个空间L形柱-混凝土梁框架节点的拟静力试验;比较分析试件的破坏形态、滞回曲线、承载能力、刚度退化、耗能能力、位移延性以及层间位移角等抗震性能指标。研究结果表明:平面节点和空间节点的破坏形态分别为核心区发生剪切破坏和梁端出现塑性铰,带楼板工作的钢筋混凝土梁柱空间节点出现板的弯曲破坏以及梁底出现塑性铰的破坏模式;配实腹式型钢试件的滞回曲线比配空腹式型钢试件的饱满;平面节点的承载能力比空间节点的大,但耗能能力、位移延性及抗倒塌能力均不及空间节点;楼板的存在对节点承载能力的提高和维持刚度的稳定均具有有利作用;轴压比可提高节点的承载力和初始刚度;L形柱框架节点的层间变形能力大于规范规定的层间位移角限值。通过引入加载角度,提出了型钢混凝土L形柱-梁空间节点受剪承载力计算模型,其能较好地反映节点核心发生剪切破坏的传力机制。
To study the hysteretic behavior of L-shaped steel reinforced concrete( SRC) column-concrete beam joints,four planar joint specimens and seven 3D joint specimens were tested under the quasi-static state,and the varying parameters included steel form for cross section of column,axial compression ratio,horizontal loading angle and participation of floor slab. The failure mode,hysteresis curve,bearing capacity,stiffness degradation,energy dissipation capacity,displacement ductility and storey drift angle were compared and analyzed for those specimens. The test results show that for planar joints,the main failure mode is the shear failure,while for 3D joints,their failures are attributed to the plastic hinge appeared in the beam end. For RC 3D joints with floor slab participated,the main failure modes shall be the flexural failure of floor slab and the plastic hinge appeared at the bottom of beam. The hysteresis curves of specimens with solid-web steel shall be more plump than those of specimens with hollow-web steel. The bearing capacity of planar joints is larger than that of 3D joints,but their energy dissipation capacity,displacement ductility and collapse resistance shall be inferior to those of 3D joints. The existence of floor slab shall be beneficial to the enhancement of bearing capacity and the stability of stiffness for the joints. A large axial compression ratio can increase the bearing capacity and the initial stiffness of specimens. The storey deformation capacity of L-shaped column frame joints is larger than the storey drift angle limit specified by code. By introducing the loading angle,the calculation model of shear capacity is proposed for L-shaped SRC column-beam 3D joints,and the model can reflect the forcing mechanism of shear failure in the core of joint.
To study the hysteretic behavior of L-shaped steel reinforced concrete( SRC) column-concrete beam joints,four planar joint specimens and seven 3D joint specimens were tested under the quasi-static state,and the varying parameters included steel form for cross section of column,axial compression ratio,horizontal loading angle and participation of floor slab. The failure mode,hysteresis curve,bearing capacity,stiffness degradation,energy dissipation capacity,displacement ductility and storey drift angle were compared and analyzed for those specimens. The test results show that for planar joints,the main failure mode is the shear failure,while for 3D joints,their failures are attributed to the plastic hinge appeared in the beam end. For RC 3D joints with floor slab participated,the main failure modes shall be the flexural failure of floor slab and the plastic hinge appeared at the bottom of beam. The hysteresis curves of specimens with solid-web steel shall be more plump than those of specimens with hollow-web steel. The bearing capacity of planar joints is larger than that of 3D joints,but their energy dissipation capacity,displacement ductility and collapse resistance shall be inferior to those of 3D joints. The existence of floor slab shall be beneficial to the enhancement of bearing capacity and the stability of stiffness for the joints. A large axial compression ratio can increase the bearing capacity and the initial stiffness of specimens. The storey deformation capacity of L-shaped column frame joints is larger than the storey drift angle limit specified by code. By introducing the loading angle,the calculation model of shear capacity is proposed for L-shaped SRC column-beam 3D joints,and the model can reflect the forcing mechanism of shear failure in the core of joint.
引文
[1]陈宗平,薛建阳,赵鸿铁,等.型钢混凝土异形柱抗震性能试验研究[J].建筑结构学报,2007,28(3):53-61(Chen Zongping,Xue Jianyang,Zhao Hongtie,et al.Experimental study on seismic behavior of steel reinforced concrete special-shaped columns[J].Journal of Building Structures,2007,28(3):53-61(in Chinese))
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[3]薛建阳,高亮,刘祖强,等.空腹式型钢混凝土异形柱中框架抗侧刚度试验研究[J].工程力学,2013,30(9):34-40,46(Xue Jianyang,Gao Liang,Liu Zuqiang,et al.Experimental study on lateral stiffness of lattice steel reinforced concrete middle frame with special-shaped columns[J].Engineering Mechanics,2013,30(9):34-40,46(in Chinese))
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[5]Xue J,Gao L,Liu Z,et al.Experimental study on mechanical performances of lattice steel reinforced concrete inner frame with irregular section columns[J].Steel and Composite Structures,2014,16(3):253-267
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[7]薛建阳,刘义,赵鸿铁,等.型钢混凝土异形柱框架节点抗震性能试验研究[J].建筑结构学报,2009,30(4):69-77(Xue Jianyang,Liu Yi,Zhao Hongtie,et al.Experimental study on seismic behavior of steel reinforced concrete special-shaped column-beam joints[J].Journal of Building Structures,2009,30(4):69-77(in Chinese))
[8]陈宗平,王妮,薛建阳,等.型钢混凝土L形柱-混凝土梁节点的受力性能[J].广西大学学报:自然科学版,2011,36(4):530-534(Chen Zongping,Wang Ni,Xue Jianyang,et al.Mechanical behaviors of the joint between steel reinforced concrete L-shaped column and concrete beam frame under low-cyclic reversed loading[J].Journal of Guangxi University:Natural Science Edition,2011,36(4):530-534(in Chinese))
[9]陈宗平,徐金俊,薛建阳.型钢混凝土十形截面柱-梁平面与空间节点滞回性能试验研究[J].建筑结构学报,2014,35(8):80-87(Chen Zongping,Xu Jinjun,Xue Jianyang.Experimental investigation on hysteretic behavior of planar and 3D joints in cruciform SRC column frame[J].Journal of Building Structures,2014,35(8):80-87(in Chinese))
[10]王妮,陈宗平,张士前,等.型钢混凝土异形柱中节点受力性能试验及有限元分析[J].建筑结构学报,2013,34(增1):102-109(Wang Ni,Chen Zongping,Zhang Shiqian,et al.Experimental research and FEA on mechanical behavior of interior joint between SRC special shaped column and steel beam[J].Journal of Building Structures,2013,34(S1):102-109(in Chinese))
[11]张士前,陈宗平,王妮,等.型钢混凝土十形柱空间节点受剪机理及抗剪强度研究[J].土木工程学报,2014,47(9):84-93(Zhang Shiqian,Chen Zongping,Wang Ni,et al.Shear mechanism and shear strength of steel reinforced concrete(SRC)cross-shape 3D column-beam joints[J].China Civil Engineering Journal,2014,47(9):84-93(in Chinese))
[12]徐金俊,陈宗平,薛建阳.型钢混凝土T形柱-钢梁空间节点的地震损伤评估及影响因素分析[J].应用基础与工程科学学报,2014,22(6):1166-1177(Xu Jinjun,Chen Zongping,Xue Jianyang.Earthquake damage evolution and influence factor analysis on space joints for Tshaped SRC column-steel beams[J].Journal of Basic Science and Engineering,2014,22(6):1166-1177(in Chinese))
[13]帕克R,波利T.钢筋混凝土结构(下册)[M].秦文钺,等译.重庆:重庆大学出版社,1986:227(Park R,Pauley T.Reinforced concrete structure(VolumeⅡ)[M].Qin Wenyue,et al,translate.Chongqing:Chongqing University Press,1986:227(in Chinese))
[14]王墩,吕西林,卢文胜.带接缝连接梁的预制混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2013,34(10):1-11(Wang Dun,Lu Xilin,Lu Wensheng.Experimental study on seismic performance of precast concrete shear walls with joint connecting beam[J].Journal of Building Structures,2013,34(10):1-11(in Chinese))
[15]赵鸿铁.钢与混凝土组合结构[M].北京:科学出版社,2001:168-176(Zhao Hongtie.Steel and concrete composite structures[M].Beijing:Science Press,2001:168-176(in Chinese))
[16]Tao M,Fan J,Nie J.Seismic behavior of steel reinforced concrete column-steel truss beam hybrid joints[J].Engineering Structures,2013,56:1557-1569
[17]王妮.型钢混凝土L形柱空间角节点抗震性能研究[D].南宁:广西大学,2014(Wang Ni.Research on seismic performance of steel reinforced concrete L-shaped column special column space corner joint[D].Nanning:Guangxi University,2014(in Chinese))
[18]薛建阳,陈宗平,赵鸿铁.型钢混凝土异形柱结构的性能、设计方法及其工程应用[M].北京:中国建筑工业出版社,2011:179,199(Xue Jianyang,Chen Zongping,Zhao Hongtie.Performance,design method and engineering application of steel reinforced concrete specialshaped column structures[M].Beijing:China Architecture&Building Press,2011:179,199(in Chinese))
[2]Xue J,Chen Z,Zhao H,et al.Shear mechanism and bearing capacity calculation on steel reinforced concrete special-shaped columns[J].Steel and Composite Structures,2012,13(5):473-487
[3]薛建阳,高亮,刘祖强,等.空腹式型钢混凝土异形柱中框架抗侧刚度试验研究[J].工程力学,2013,30(9):34-40,46(Xue Jianyang,Gao Liang,Liu Zuqiang,et al.Experimental study on lateral stiffness of lattice steel reinforced concrete middle frame with special-shaped columns[J].Engineering Mechanics,2013,30(9):34-40,46(in Chinese))
[4]刘祖强,薛建阳,葛鸿鹏,等.实腹式型钢混凝土异形柱框架刚度与承载力试验研究[J].工程力学,2013,30(10):86-92,107(Liu Zuqiang,Xue Jianyang,Ge Hongpeng,et al.Experimental study on stiffness and loading capacity of solid steel reinforced concrete frame with special-shaped columns[J].Engineering Mechanics,2013,30(10):86-92,107(in Chinese))
[5]Xue J,Gao L,Liu Z,et al.Experimental study on mechanical performances of lattice steel reinforced concrete inner frame with irregular section columns[J].Steel and Composite Structures,2014,16(3):253-267
[6]万云芳.低周反复荷载作用下钢骨混凝土T形柱节点抗震性能研究[D].南宁:广西大学,2006:10-47(Wan Yunfang.Study on the anti-seismic behavior of joints between SRC special shaped columns and reinforced beams under low cyclic reversed loading[D].Nanning:Guangxi University,2006:10-47(in Chinese))
[7]薛建阳,刘义,赵鸿铁,等.型钢混凝土异形柱框架节点抗震性能试验研究[J].建筑结构学报,2009,30(4):69-77(Xue Jianyang,Liu Yi,Zhao Hongtie,et al.Experimental study on seismic behavior of steel reinforced concrete special-shaped column-beam joints[J].Journal of Building Structures,2009,30(4):69-77(in Chinese))
[8]陈宗平,王妮,薛建阳,等.型钢混凝土L形柱-混凝土梁节点的受力性能[J].广西大学学报:自然科学版,2011,36(4):530-534(Chen Zongping,Wang Ni,Xue Jianyang,et al.Mechanical behaviors of the joint between steel reinforced concrete L-shaped column and concrete beam frame under low-cyclic reversed loading[J].Journal of Guangxi University:Natural Science Edition,2011,36(4):530-534(in Chinese))
[9]陈宗平,徐金俊,薛建阳.型钢混凝土十形截面柱-梁平面与空间节点滞回性能试验研究[J].建筑结构学报,2014,35(8):80-87(Chen Zongping,Xu Jinjun,Xue Jianyang.Experimental investigation on hysteretic behavior of planar and 3D joints in cruciform SRC column frame[J].Journal of Building Structures,2014,35(8):80-87(in Chinese))
[10]王妮,陈宗平,张士前,等.型钢混凝土异形柱中节点受力性能试验及有限元分析[J].建筑结构学报,2013,34(增1):102-109(Wang Ni,Chen Zongping,Zhang Shiqian,et al.Experimental research and FEA on mechanical behavior of interior joint between SRC special shaped column and steel beam[J].Journal of Building Structures,2013,34(S1):102-109(in Chinese))
[11]张士前,陈宗平,王妮,等.型钢混凝土十形柱空间节点受剪机理及抗剪强度研究[J].土木工程学报,2014,47(9):84-93(Zhang Shiqian,Chen Zongping,Wang Ni,et al.Shear mechanism and shear strength of steel reinforced concrete(SRC)cross-shape 3D column-beam joints[J].China Civil Engineering Journal,2014,47(9):84-93(in Chinese))
[12]徐金俊,陈宗平,薛建阳.型钢混凝土T形柱-钢梁空间节点的地震损伤评估及影响因素分析[J].应用基础与工程科学学报,2014,22(6):1166-1177(Xu Jinjun,Chen Zongping,Xue Jianyang.Earthquake damage evolution and influence factor analysis on space joints for Tshaped SRC column-steel beams[J].Journal of Basic Science and Engineering,2014,22(6):1166-1177(in Chinese))
[13]帕克R,波利T.钢筋混凝土结构(下册)[M].秦文钺,等译.重庆:重庆大学出版社,1986:227(Park R,Pauley T.Reinforced concrete structure(VolumeⅡ)[M].Qin Wenyue,et al,translate.Chongqing:Chongqing University Press,1986:227(in Chinese))
[14]王墩,吕西林,卢文胜.带接缝连接梁的预制混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2013,34(10):1-11(Wang Dun,Lu Xilin,Lu Wensheng.Experimental study on seismic performance of precast concrete shear walls with joint connecting beam[J].Journal of Building Structures,2013,34(10):1-11(in Chinese))
[15]赵鸿铁.钢与混凝土组合结构[M].北京:科学出版社,2001:168-176(Zhao Hongtie.Steel and concrete composite structures[M].Beijing:Science Press,2001:168-176(in Chinese))
[16]Tao M,Fan J,Nie J.Seismic behavior of steel reinforced concrete column-steel truss beam hybrid joints[J].Engineering Structures,2013,56:1557-1569
[17]王妮.型钢混凝土L形柱空间角节点抗震性能研究[D].南宁:广西大学,2014(Wang Ni.Research on seismic performance of steel reinforced concrete L-shaped column special column space corner joint[D].Nanning:Guangxi University,2014(in Chinese))
[18]薛建阳,陈宗平,赵鸿铁.型钢混凝土异形柱结构的性能、设计方法及其工程应用[M].北京:中国建筑工业出版社,2011:179,199(Xue Jianyang,Chen Zongping,Zhao Hongtie.Performance,design method and engineering application of steel reinforced concrete specialshaped column structures[M].Beijing:China Architecture&Building Press,2011:179,199(in Chinese))