影响钢管混凝土组合桥墩抗震性能的结构参数
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摘要
为了研究钢管混凝土(CFST)组合桥墩的抗震性能,对5个桥墩试件进行低周反复加载试验,研究轴压比、配箍率、纵筋率和剪跨比对试件骨架曲线、承载能力、位移延性、刚度退化和耗能能力的影响.建立有限元模型模拟钢管混凝土组合桥墩在水平反复荷载作用下的滞回性能,数值计算结果与试验实测值吻合较好.采用该有限元模型扩充结构参数范围,进一步分析各参数对组合桥墩抗震性能的影响.试验及数值模拟结果表明:组合桥墩试件的水平侧移刚度和承载力随轴压比的增加而提高,但位移延性和耗能能力变差;提高配箍率或纵筋率均可改善组合桥墩的抗震性能;剪跨比是影响试件破坏模式的重要因素,随着剪跨比的增加,试件的水平承载力和侧移刚度降低,但变形和耗能能力明显提高.
Five pier specimens were tested under low-cyclic reversed loading conditions to study the seismic behavior of concrete-filled steel tube(CFST) composite piers. The effects of axial compression ratio, stirrup ratio,longitudinal reinforcement ratio and shear span ratio on skeleton curve, load capacity, displacement ductility,stiffness degradation and energy dissipation capacity of the specimens were discussed. A finite element model was established to simulate the hysteretic behaviors of CFST composite piers under lateral repeated loads. The numerical results agreed well with the measured values. The finite element model was used to expand the range of structural parameters, and the influence of various structural parameters on the seismic behavior of composite piers was further analyzed. The test and numerical simulation results show that the lateral displacement stiffness and the bearing capacity of the composite pier increase with the increase of axial compression ratio, whereas the displacement ductility and the energy dissipation capacity deteriorate. Increasing the stirrup ratio or the longitudinal reinforcement ratio will improve the seismic performance of the composite pier. Shear span ratio is an important factor influencing the specimen failure mode. As the shear span ratio increases, the lateral bearing capacity and the lateral displacement stiffness of the specimen decrease, but the deformation and the energy dissipation capacity increase obviously.
Five pier specimens were tested under low-cyclic reversed loading conditions to study the seismic behavior of concrete-filled steel tube(CFST) composite piers. The effects of axial compression ratio, stirrup ratio,longitudinal reinforcement ratio and shear span ratio on skeleton curve, load capacity, displacement ductility,stiffness degradation and energy dissipation capacity of the specimens were discussed. A finite element model was established to simulate the hysteretic behaviors of CFST composite piers under lateral repeated loads. The numerical results agreed well with the measured values. The finite element model was used to expand the range of structural parameters, and the influence of various structural parameters on the seismic behavior of composite piers was further analyzed. The test and numerical simulation results show that the lateral displacement stiffness and the bearing capacity of the composite pier increase with the increase of axial compression ratio, whereas the displacement ductility and the energy dissipation capacity deteriorate. Increasing the stirrup ratio or the longitudinal reinforcement ratio will improve the seismic performance of the composite pier. Shear span ratio is an important factor influencing the specimen failure mode. As the shear span ratio increases, the lateral bearing capacity and the lateral displacement stiffness of the specimen decrease, but the deformation and the energy dissipation capacity increase obviously.
引文
[1]钱稼茹,康洪震.钢管高强混凝土组合柱抗震性能试验研究[J].建筑结构学报,2009,30(4):85-93.QIAN Jia-ru,KANG Houg-zhen.Experimental study on seismic behavior of high-strength concrete-filled steel tube composite columns[J].Journal of Building Structures,2009,30(4):85-93.
[2]康洪震,钱稼茹.钢管混凝土叠合柱轴压强度试验研究[J].建筑结构,2006,36(增9):22-25.KANG Hong-zhen,QIAN Jia-ru.An experiment study of axial compressive strength of concrete filled steel tube composite columns[J].Building Structures,2006,36(Suppl.9):22-25.
[3]尧国皇,李永进,廖飞宇.钢管混凝土叠合柱轴压性能研究[J].建筑结构学报,2013,34(5):114-121.YAO Guo-huang,LI Yong-jin,LIAO Fei-yu.Behavior of concrete-filled steel tube reinforced concrete columns subjected to axial compression[J].Journal of Building Structures,2013,34(5):114-121.
[4]王刚,钱稼茹,林立岩.钢管混凝土叠合构件受弯性能分析[J].工业建筑,2006,36(2):68-71.WANG Gang,QIAN Jia-ru,LIN Li-yan.Study on bending behavior of steel reinforced concrete members[J].Industrial Construction,2006,36(2):68-71.
[5]赵国藩,张德娟,黄承逵.钢管砼增强高强砼柱的抗震性能研究[J].大连理工大学学报,1996,36(6):125-132.ZHAO Guo-fan,ZHANG De-juan,HUANG Chengkui.Study of earthquake resistant behavior of high strength concrete column reinforced with concrete filled steel tube[J].Journal of Dalian University of Technology,1996,36(6):125-132.
[6]聂建国,柏宇,李胜勇,等.钢管混凝土核心柱轴压组合性能分析[J].土木工程学报,2005,38(9):9-13.NIE Jian-guo,BAI Yu,LI Sheng-yong,et al.Analysis on composite column with inside concrete filled tube under axial compression[J].China Civil Engineering Journal,2005,38(9):9-13.
[7]林立岩,李庆钢.混凝土与钢的组合促进高层建筑结构的发展[J].东南大学学报:自然科学版,2002,32(5):702-705.LIN Li-yan,LI Qing-gang.Composition of concrete and steel promotes the development of high-rise building[J].Journal of Southeast University:Natural Science Edition,2002,32(5):702-705.
[8]林立岩,李庆钢.钢管混凝土叠合柱的设计概念与技术经济性分析[J].建筑结构,2008,38(3):17-21.LIN Li-yan,LI Qing-gang.Design concept and analysis of technical economy for steel tube reinforced concrete column[J].Building Structure,2008,38(3):17-21.
[9]林立岩,国建龙,耿昕.钢管砼叠合柱:一种抗震性能良好的新型柱[C]//第七届全国结构工程学术会议论文集:第Ⅱ卷.石家庄:中国力学学会,1998:7-10.LIN Li-yan,GUO Jian-long,GENG Xin.Steel-tube composite column:a new type column with good seismic performance[C]//Proceedings of the 7th National Conference on Structural Engineering:Vol.Ⅱ.Shijiazhuang:CSTAM,1998:7-10.
[10]徐明.钢骨混凝土柱在南京交通大厦中的应用[C]//第十届全国结构工程学术会议论文集:第Ⅲ卷.南京:中国力学学会,2001:452-456.XU Ming.Application of SRC columns in Nanjing traffic building[C]//Proceedings of the 10th National Conference on Structural Engineering:Vol.Ⅲ.Nanjing:CSTAM,2001:452-456.
[11]禹长永.钢管核心混凝土桥墩抗震性能研究[D].大连:大连理工大学,2013.YU Chang-yong.Research on the seismic behavior of the concrete pier with core of concrete filled steel tube[D].Dalian:Dalian University of Technology,2013.
[12]唐志强.钢管混凝土核心柱组合桥墩抗震性能研究[D].大连:大连理工大学,2015.TANG Zhi-qiang.Study on the seismic performance of composite bridge piers with concrete filled steel tubular column embedded inside[D].Dalian:Dalian University of Technology,2015.
[13]QIU W L,JIANG M.Seismic responses of composite bridge piers with CFT columns embedded inside[J].Steel and Composite Structures,2013,15(3):343-355.
[14]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,2010,43(6):57-66.LIU Yang,GUO Zi-xiong,OUYANG Wen-jun,et al.Experimental study of the seismic behavior and axial compression ratio limit of CSRC columns[J].China Civil Engineering Journal,2010,43(6):57-66.
[15]金向前.配有圆钢管的钢骨混凝土柱抗震性能试验研究[C]//第十届全国结构工程学术会议论文集:第Ⅲ卷.南京:中国力学学会,2001:6.Jin Xiang-qian.Experimental study on seismic behavior of src columns with circular steel tubes[C]//Proceedings of the 10th National Conference on Structural Engineering:Vol.Ⅲ.Nanjing:CSTAM,2001:6
[16]陈小刚,牟在根,张举兵,等.型钢混凝土柱抗震性能实验研究[J].北京科技大学学报,2009,31(12):1516-1524.CHEN Xiao-gang,MOU Zai-gen,ZHANG Ju-bing,et al.Experimental study on the seimic behavior of steel reinforced concrete columns[J].Journal of University of Seience and Technology Beijing,2009,31(12):1516-1524.
[17]赵桂峰,李瑶亮,张猛,等.锈蚀钢筋混凝土框架柱滞回性能的数值模拟研究[J].世界地震工程,2014,30(2):71-79.ZHAO Gui-feng,LI Yao-liang,ZHANG Meng,et al.Numerical simulation research on hysteresis performance of the corroded reinforced concrete frame columns[J].Word Earthquake Engineering,2014,30(2):71-79.
[18]国家质检总局.混凝土结构设计规范:GB 50010-2010[S].北京:中国建筑工业出版社,2010.
[19]ACI 318 Committee.Building code requirements for structural concrete(ACI 318-05)and commentary(ACI318R-05)[S].Farmington Hills:American Concrete Institute,2005.
[20]MANDER J B,PRIESTLEY M J N,PARK R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826.
[21]刘威,韩林海.ABAQUS分析钢管混凝土轴压性能的若干问题研究[J].哈尔滨工业大学学报,2005,37(增1):157-160.LIU Wei,HAN Lin-hai.Investigation in some problems of behaviors of concrete filled steel tubes subject axial local compression by ABAQUSmethod[J].Journal of Harbin University of Technology,2005,37(Suppl.1):157-160.
[22]聂建国,王宇航.ABAQUS中混凝土本构模型用于模拟结构静力行为的比较研究[J].工程力学,2013,30(4):59-67.NIE Jian-guo,WANG Yu-hang.Comparison study of constitutive model of concrete in ABAQUS for static analysis of structures[J].Engineering Mechanics,2013,30(4):59-67.
[23]李贵乾.钢筋混凝土桥墩抗震性能试验研究及数值分析[D].重庆:重庆交通大学,2010.LI Gui-qian.Experimental study and numerical analysis on seismic performance of reinforced concrete bridge columns[D].Chongqing:Chongqing Jiaotong University,2010.
[24]BIRTEL V,MARK P.Parameterised finite element modelling of RC beam shear failure[C]//Proceedings of the 19th Annual International ABAQUS Users’Conference.Boston:ABAQUR Inc,2006:95-108.
[2]康洪震,钱稼茹.钢管混凝土叠合柱轴压强度试验研究[J].建筑结构,2006,36(增9):22-25.KANG Hong-zhen,QIAN Jia-ru.An experiment study of axial compressive strength of concrete filled steel tube composite columns[J].Building Structures,2006,36(Suppl.9):22-25.
[3]尧国皇,李永进,廖飞宇.钢管混凝土叠合柱轴压性能研究[J].建筑结构学报,2013,34(5):114-121.YAO Guo-huang,LI Yong-jin,LIAO Fei-yu.Behavior of concrete-filled steel tube reinforced concrete columns subjected to axial compression[J].Journal of Building Structures,2013,34(5):114-121.
[4]王刚,钱稼茹,林立岩.钢管混凝土叠合构件受弯性能分析[J].工业建筑,2006,36(2):68-71.WANG Gang,QIAN Jia-ru,LIN Li-yan.Study on bending behavior of steel reinforced concrete members[J].Industrial Construction,2006,36(2):68-71.
[5]赵国藩,张德娟,黄承逵.钢管砼增强高强砼柱的抗震性能研究[J].大连理工大学学报,1996,36(6):125-132.ZHAO Guo-fan,ZHANG De-juan,HUANG Chengkui.Study of earthquake resistant behavior of high strength concrete column reinforced with concrete filled steel tube[J].Journal of Dalian University of Technology,1996,36(6):125-132.
[6]聂建国,柏宇,李胜勇,等.钢管混凝土核心柱轴压组合性能分析[J].土木工程学报,2005,38(9):9-13.NIE Jian-guo,BAI Yu,LI Sheng-yong,et al.Analysis on composite column with inside concrete filled tube under axial compression[J].China Civil Engineering Journal,2005,38(9):9-13.
[7]林立岩,李庆钢.混凝土与钢的组合促进高层建筑结构的发展[J].东南大学学报:自然科学版,2002,32(5):702-705.LIN Li-yan,LI Qing-gang.Composition of concrete and steel promotes the development of high-rise building[J].Journal of Southeast University:Natural Science Edition,2002,32(5):702-705.
[8]林立岩,李庆钢.钢管混凝土叠合柱的设计概念与技术经济性分析[J].建筑结构,2008,38(3):17-21.LIN Li-yan,LI Qing-gang.Design concept and analysis of technical economy for steel tube reinforced concrete column[J].Building Structure,2008,38(3):17-21.
[9]林立岩,国建龙,耿昕.钢管砼叠合柱:一种抗震性能良好的新型柱[C]//第七届全国结构工程学术会议论文集:第Ⅱ卷.石家庄:中国力学学会,1998:7-10.LIN Li-yan,GUO Jian-long,GENG Xin.Steel-tube composite column:a new type column with good seismic performance[C]//Proceedings of the 7th National Conference on Structural Engineering:Vol.Ⅱ.Shijiazhuang:CSTAM,1998:7-10.
[10]徐明.钢骨混凝土柱在南京交通大厦中的应用[C]//第十届全国结构工程学术会议论文集:第Ⅲ卷.南京:中国力学学会,2001:452-456.XU Ming.Application of SRC columns in Nanjing traffic building[C]//Proceedings of the 10th National Conference on Structural Engineering:Vol.Ⅲ.Nanjing:CSTAM,2001:452-456.
[11]禹长永.钢管核心混凝土桥墩抗震性能研究[D].大连:大连理工大学,2013.YU Chang-yong.Research on the seismic behavior of the concrete pier with core of concrete filled steel tube[D].Dalian:Dalian University of Technology,2013.
[12]唐志强.钢管混凝土核心柱组合桥墩抗震性能研究[D].大连:大连理工大学,2015.TANG Zhi-qiang.Study on the seismic performance of composite bridge piers with concrete filled steel tubular column embedded inside[D].Dalian:Dalian University of Technology,2015.
[13]QIU W L,JIANG M.Seismic responses of composite bridge piers with CFT columns embedded inside[J].Steel and Composite Structures,2013,15(3):343-355.
[14]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,2010,43(6):57-66.LIU Yang,GUO Zi-xiong,OUYANG Wen-jun,et al.Experimental study of the seismic behavior and axial compression ratio limit of CSRC columns[J].China Civil Engineering Journal,2010,43(6):57-66.
[15]金向前.配有圆钢管的钢骨混凝土柱抗震性能试验研究[C]//第十届全国结构工程学术会议论文集:第Ⅲ卷.南京:中国力学学会,2001:6.Jin Xiang-qian.Experimental study on seismic behavior of src columns with circular steel tubes[C]//Proceedings of the 10th National Conference on Structural Engineering:Vol.Ⅲ.Nanjing:CSTAM,2001:6
[16]陈小刚,牟在根,张举兵,等.型钢混凝土柱抗震性能实验研究[J].北京科技大学学报,2009,31(12):1516-1524.CHEN Xiao-gang,MOU Zai-gen,ZHANG Ju-bing,et al.Experimental study on the seimic behavior of steel reinforced concrete columns[J].Journal of University of Seience and Technology Beijing,2009,31(12):1516-1524.
[17]赵桂峰,李瑶亮,张猛,等.锈蚀钢筋混凝土框架柱滞回性能的数值模拟研究[J].世界地震工程,2014,30(2):71-79.ZHAO Gui-feng,LI Yao-liang,ZHANG Meng,et al.Numerical simulation research on hysteresis performance of the corroded reinforced concrete frame columns[J].Word Earthquake Engineering,2014,30(2):71-79.
[18]国家质检总局.混凝土结构设计规范:GB 50010-2010[S].北京:中国建筑工业出版社,2010.
[19]ACI 318 Committee.Building code requirements for structural concrete(ACI 318-05)and commentary(ACI318R-05)[S].Farmington Hills:American Concrete Institute,2005.
[20]MANDER J B,PRIESTLEY M J N,PARK R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826.
[21]刘威,韩林海.ABAQUS分析钢管混凝土轴压性能的若干问题研究[J].哈尔滨工业大学学报,2005,37(增1):157-160.LIU Wei,HAN Lin-hai.Investigation in some problems of behaviors of concrete filled steel tubes subject axial local compression by ABAQUSmethod[J].Journal of Harbin University of Technology,2005,37(Suppl.1):157-160.
[22]聂建国,王宇航.ABAQUS中混凝土本构模型用于模拟结构静力行为的比较研究[J].工程力学,2013,30(4):59-67.NIE Jian-guo,WANG Yu-hang.Comparison study of constitutive model of concrete in ABAQUS for static analysis of structures[J].Engineering Mechanics,2013,30(4):59-67.
[23]李贵乾.钢筋混凝土桥墩抗震性能试验研究及数值分析[D].重庆:重庆交通大学,2010.LI Gui-qian.Experimental study and numerical analysis on seismic performance of reinforced concrete bridge columns[D].Chongqing:Chongqing Jiaotong University,2010.
[24]BIRTEL V,MARK P.Parameterised finite element modelling of RC beam shear failure[C]//Proceedings of the 19th Annual International ABAQUS Users’Conference.Boston:ABAQUR Inc,2006:95-108.