带拉筋方中空夹层钢管混凝土轴压短柱受力性能研究
|
摘要
通过带拉筋方中空夹层钢管混凝土轴压短柱受力性能试验,研究了拉筋配箍率对试件承载力、刚度、延性及横向变形系数的影响。采用混凝土三轴受力状态本构模型和钢材本构模型,应用ABAQUS有限元分析软件建立并验证了带拉筋方中空夹层钢管混凝土轴压短柱三维实体有限元模型,有限元计算结果与试验结果吻合良好;在此基础上,分析了拉筋对内外方钢管和混凝土约束作用机理。研究结果表明:拉筋能有效缓解了方钢管的局部屈曲,对短柱承载力、刚度、延性的提高效果明显;拉筋加强了内钢管对混凝土的约束作用,使得内钢管受力更加合理,并且拉筋配箍率越大,约束作用越明显。
This paper presents the experimental study of stirrup-confined concrete-filled square double-skin steel tubular stub columns under axial loading. The influences of different stirrup ratios on bearing capacity,stiffness,ductility and strain ratio of stub columns were discussed. ABAQUS was used to establish the 3 D finite element models for these stub columns under axial compression and the effect of different stirrup ratio on the internal force of steel tube and core concrete was further discussed. The FE results agree well with the experimental results. The results indicate that the tensile stirrups in stirrup-confined concrete-filled square double-skin steel tubular stub columns could effectively reduce local bucking of the square steel tube and significantly improve bearing capacity,stiffness and ductility. The stirrups strengthen the confinement effect of the inner steel tube on the concrete,and make the inner steel tube force more reasonable.
This paper presents the experimental study of stirrup-confined concrete-filled square double-skin steel tubular stub columns under axial loading. The influences of different stirrup ratios on bearing capacity,stiffness,ductility and strain ratio of stub columns were discussed. ABAQUS was used to establish the 3 D finite element models for these stub columns under axial compression and the effect of different stirrup ratio on the internal force of steel tube and core concrete was further discussed. The FE results agree well with the experimental results. The results indicate that the tensile stirrups in stirrup-confined concrete-filled square double-skin steel tubular stub columns could effectively reduce local bucking of the square steel tube and significantly improve bearing capacity,stiffness and ductility. The stirrups strengthen the confinement effect of the inner steel tube on the concrete,and make the inner steel tube force more reasonable.
引文
[1]YU Z W,DING F X,CAI C S.Experimental behavior of circular concrete-filled steel tube stub columns[J].Journal of Constructional Steel Research,2007,63(2):165-174.
[2]黄宏,查宝军,陈梦成,等.方中空夹层钢管混凝土轴压短柱力学性能对比试验研究[J].铁道建筑,2015,55(10):85-89.(HUANG Hong,ZHA Baojun,CHEN Mengcheng,et al.Comparative test study on mechanical behavior of concrete-filled double-skin steel tubular with hollow-centered square section short columns under axial compression[J].Railway Engineering,2015,55(10):85-89.(in Chinese))
[3]韩林海.钢管混凝土结构[M].北京:科学出版社,2000:9-10.
[4]谢力,林博洋,袁方,等.方中空夹层钢管混凝土柱压-弯-剪受力性能试验研究[J].建筑结构学报,2015,36(增刊1):230-234.(XIE Li,LIN Boyang,YUAN Fang,et al.Experimental study on mechanical performance of square concrete filled double-skin steel tubular columns under compression-bending-shear loading conditions[J].Journal of Building Structures,2015,36(Suppl.1):230-234.(in Chinese))
[5]杨有福,孟春媛.方中空夹层钢管混凝土横向局压性能研究[J].建筑科学与工程学报,2015,32(4):92-98.(YANG Youfu,MENG Chunyuan.Research on performance of square CFDST under lateral partial compression[J].Journal of Architecture and Civil Engineering,2015,32(4):92-98.(in Chinese))
[6]郭立湘,李婷,杨建,等.方中空夹层钢管混凝土压扭构件的试验及有限元计算研究[J].工业建筑,2015,45(7):148-152.(GUO Lixiang,LI Ting,YANG Jian,et al.Experimental and finite-element calculation study on concrete-filled double skin steel tubular members under compression and torsion[J].Industrial Construction,2015,45(7):148-152.(in Chinese))
[7]黄宏,孙微,陈梦成,等.圆形截面中空夹层钢管混凝土短柱复合受力试验研究[J].建筑结构学报,2015,36(9):53-59.(HUANG Hong,SUN Wei,CHEN Mengcheng,et al.Experimental study on concretefilled double-skin circular steel tubes under combined loadings[J].Journal of Building Structures,2015,36(9):53-59.(in Chinese))
[8]PAGOULATOU M,SHEEHAN T,DAI X H,et al.Finite element analysis on the capacity of circular concrete-filled double-skin steel tubular(CFDST)stub columns[J].Engineering Structures,2014,72:102-112.
[9]ZHAO Xiaoling,TONG Lewei,WANG Xingyi.CFDST stub columns subjected to large deformation axial loading[J].Engineering Structures,2010,32(3):692-703.
[10]REN Q X,HOU C,LAN D,HAN L H.Experiments on the bearing capacity of tapered concrete filled double skin steel tubular(CFDST)stub columns[J].Steel and Composite Structures,2014,17(5):665-684.
[11]DING Faxing,LU Deren,BAI Yu,et al.Comparative study of square stirrup-confined concrete-filled steel tubular stub columns under axial loading[J].ThinWalled Structures,2016,98(1):443-453.
[12]普通混凝土力学性能试验方法标准:GB/T 50081—2002[S].北京:中国建筑工业出版社,2003.(Standard for test method of mechanical properties on ordinary concrete:GB/T 50081—2002[S].Beijing:China Architecture&Building Press,2003.(in Chinese))
[13]钢结构设计规范:GB 50017—2003[S].北京:中国建筑工业出版社,2003.(Code for design of steel structures:GB 50017—2003[S].Beijing:China Architecture&Building Press,2003(in Chinese))
[14]金属材料拉伸试验:第1部分:室温试验方法:GB/T228.1—2010[S].北京:中国标准出版社,2010.(Metallic materials:tensile testing:part 1:method of test at room temperature:GB/T 228.1—2010[S].Beijing:Standards Press of China,2010.(in Chinese))
[15]DING F X,FU L,LIU X M,et al.Mechanical performances of track-shaped rebar stiffened concretefilled steel tubular(SCFRT)stub columns under axial compression[J].Thin-Walled Structures,2016,99:168-181.
[16]DING Faxing,YING Xiaoyong,ZHOU Linchao,et al.Unified calculation method and its application in determining the uniaxial mechanical properties of concrete[J].Frontiers of Architecture and Civil Engineering in China,2011,5(3):381-393.
[2]黄宏,查宝军,陈梦成,等.方中空夹层钢管混凝土轴压短柱力学性能对比试验研究[J].铁道建筑,2015,55(10):85-89.(HUANG Hong,ZHA Baojun,CHEN Mengcheng,et al.Comparative test study on mechanical behavior of concrete-filled double-skin steel tubular with hollow-centered square section short columns under axial compression[J].Railway Engineering,2015,55(10):85-89.(in Chinese))
[3]韩林海.钢管混凝土结构[M].北京:科学出版社,2000:9-10.
[4]谢力,林博洋,袁方,等.方中空夹层钢管混凝土柱压-弯-剪受力性能试验研究[J].建筑结构学报,2015,36(增刊1):230-234.(XIE Li,LIN Boyang,YUAN Fang,et al.Experimental study on mechanical performance of square concrete filled double-skin steel tubular columns under compression-bending-shear loading conditions[J].Journal of Building Structures,2015,36(Suppl.1):230-234.(in Chinese))
[5]杨有福,孟春媛.方中空夹层钢管混凝土横向局压性能研究[J].建筑科学与工程学报,2015,32(4):92-98.(YANG Youfu,MENG Chunyuan.Research on performance of square CFDST under lateral partial compression[J].Journal of Architecture and Civil Engineering,2015,32(4):92-98.(in Chinese))
[6]郭立湘,李婷,杨建,等.方中空夹层钢管混凝土压扭构件的试验及有限元计算研究[J].工业建筑,2015,45(7):148-152.(GUO Lixiang,LI Ting,YANG Jian,et al.Experimental and finite-element calculation study on concrete-filled double skin steel tubular members under compression and torsion[J].Industrial Construction,2015,45(7):148-152.(in Chinese))
[7]黄宏,孙微,陈梦成,等.圆形截面中空夹层钢管混凝土短柱复合受力试验研究[J].建筑结构学报,2015,36(9):53-59.(HUANG Hong,SUN Wei,CHEN Mengcheng,et al.Experimental study on concretefilled double-skin circular steel tubes under combined loadings[J].Journal of Building Structures,2015,36(9):53-59.(in Chinese))
[8]PAGOULATOU M,SHEEHAN T,DAI X H,et al.Finite element analysis on the capacity of circular concrete-filled double-skin steel tubular(CFDST)stub columns[J].Engineering Structures,2014,72:102-112.
[9]ZHAO Xiaoling,TONG Lewei,WANG Xingyi.CFDST stub columns subjected to large deformation axial loading[J].Engineering Structures,2010,32(3):692-703.
[10]REN Q X,HOU C,LAN D,HAN L H.Experiments on the bearing capacity of tapered concrete filled double skin steel tubular(CFDST)stub columns[J].Steel and Composite Structures,2014,17(5):665-684.
[11]DING Faxing,LU Deren,BAI Yu,et al.Comparative study of square stirrup-confined concrete-filled steel tubular stub columns under axial loading[J].ThinWalled Structures,2016,98(1):443-453.
[12]普通混凝土力学性能试验方法标准:GB/T 50081—2002[S].北京:中国建筑工业出版社,2003.(Standard for test method of mechanical properties on ordinary concrete:GB/T 50081—2002[S].Beijing:China Architecture&Building Press,2003.(in Chinese))
[13]钢结构设计规范:GB 50017—2003[S].北京:中国建筑工业出版社,2003.(Code for design of steel structures:GB 50017—2003[S].Beijing:China Architecture&Building Press,2003(in Chinese))
[14]金属材料拉伸试验:第1部分:室温试验方法:GB/T228.1—2010[S].北京:中国标准出版社,2010.(Metallic materials:tensile testing:part 1:method of test at room temperature:GB/T 228.1—2010[S].Beijing:Standards Press of China,2010.(in Chinese))
[15]DING F X,FU L,LIU X M,et al.Mechanical performances of track-shaped rebar stiffened concretefilled steel tubular(SCFRT)stub columns under axial compression[J].Thin-Walled Structures,2016,99:168-181.
[16]DING Faxing,YING Xiaoyong,ZHOU Linchao,et al.Unified calculation method and its application in determining the uniaxial mechanical properties of concrete[J].Frontiers of Architecture and Civil Engineering in China,2011,5(3):381-393.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |