圆CFRP-钢复合管约束高强混凝土短柱轴压试验研究
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摘要
为研究圆CFRP-钢复合管约束高强混凝土短柱轴压受力性能,进行了6个CFRP-钢复合管约束高强混凝土(CFRPsteel composite tubed high-strength concrete,C-STC)柱和2个CFRP约束高强混凝土(CFRP-confined high-strength concrete,CC)柱、1个钢管约束高强混凝土(steel tubed high-strength concrete,STC)柱对比试件的轴压试验研究,得到了试件轴向荷载-位移曲线和CFRP及钢管的应变。结果表明:C-STC柱在轴压荷载作用下发生剪切破坏;约束模式对其前期刚度影响较小,相同CFRP层数的C-STC柱和CC柱的荷载-位移曲线第二线性段斜率近似相等;随着CFRP层数增多,短柱承载力和变形能力均能得到提高;钢管应力分析表明,STC柱钢管在峰值荷载附近屈服,C-STC柱钢管约在荷载-位移曲线第二线性段起点处屈服,钢材强度得到充分发挥。结合试验结果对已有文献中约束混凝土强度计算模型进行验证,并给出了建议的CSTC柱承载力计算式。
In order to investigate the axial mechanical behavior of circular CFRP-steel composite tubed high-strength concrete stub columns,the axial compression tests on six CFRP-steel composite tubed high-strength concrete( C-STC)columns,two CFRP confined high-strength concrete( CC) columns and one steel tubed high-strength concrete( STC)column designed for comparison were carried out. The axial load versus deformation curves of specimens and strain of CFRP and steel tubes were obtained. The test results show that the failure mode of C-STC columns under axial compression is characterized as shear failure. The type of confinement has a little influence on the initial stiffness of specimens and the slope of the second linear part of the load versus deformation curves of C-STC column is similar to that of CC column. The bearing capacity and deformation capacity of stub columns can be improved along with the increase of CFRP layers. The stress analysis of steel tube indicates that the steel tube of STC columns yields near the peak load,whereas the steel tube of C-STC columns yields approximately at the initial point of the second linear part of the load versus deformation curves,which indicating a better utilization of the strength of steel tube. Based on the test results,existing calculation methods on the load bearing capacity in existing references were verified,as well as the recommended calculation formula towards the strength of C-STC columns was proposed.
In order to investigate the axial mechanical behavior of circular CFRP-steel composite tubed high-strength concrete stub columns,the axial compression tests on six CFRP-steel composite tubed high-strength concrete( C-STC)columns,two CFRP confined high-strength concrete( CC) columns and one steel tubed high-strength concrete( STC)column designed for comparison were carried out. The axial load versus deformation curves of specimens and strain of CFRP and steel tubes were obtained. The test results show that the failure mode of C-STC columns under axial compression is characterized as shear failure. The type of confinement has a little influence on the initial stiffness of specimens and the slope of the second linear part of the load versus deformation curves of C-STC column is similar to that of CC column. The bearing capacity and deformation capacity of stub columns can be improved along with the increase of CFRP layers. The stress analysis of steel tube indicates that the steel tube of STC columns yields near the peak load,whereas the steel tube of C-STC columns yields approximately at the initial point of the second linear part of the load versus deformation curves,which indicating a better utilization of the strength of steel tube. Based on the test results,existing calculation methods on the load bearing capacity in existing references were verified,as well as the recommended calculation formula towards the strength of C-STC columns was proposed.
引文
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[12]LU Y Y,LI N,LI S.Behavior of FRP-confined concrete-filled steel tube columns[J].Polymers,2014,6(5):1333-1349.
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[14]CHOI K K,XIAO Y.Analytical model of circular CFRPconfined concrete-filled steel tubular columns under axial compression[J].Journal of Composites for Construction,2010,14(1):125-133.
[15]翟存林,魏洋,李国芬,曹兴.FRP钢复合管混凝土桥墩设计与应用研究[J].公路,2012(1),83-87.(ZHAI Cunlin,WEI Yang,LI Guofen,CAO Xing.Design and application of FRP-steel composite tube concrete piers[J].Highway,2012(1):83-87.(in Chinese))
[16]TENG J G,HU Y M,YU T.Stress-strain model for concrete in FRP-confined steel tubular columns[J].Engineering Structures,2013,49(4):156-167.
[17]DONG C X,KWAN A K H,HO J C M.Axial and lateral stress-strain model for concrete-filled steel tubes with FRP jackets[J].Engineering Structures,2016,126(11):365-378.
[18]顾威,赵颖华,贾永新.CFRP钢管混凝土长柱承载力的研究[J].工程力学,2008,25(7):147-152.(GUWei,ZHAO Yinghua,JIA Yongxin.Research on bearing capacity of long concrete-filled CFRP-steel tubular columns with axial compression[J].Engineering Mechanics,2008,25(7):147-152.(in Chinese))
[19]LI N,LU Y Y,LI S,LIU L.Slenderness effects on concrete-filled steel tube columns confined with CFRP[J].Journal of Constructional Steel Research,2018,143(4):110-118.
[20]郭莹,刘界鹏,苗亚军,王宇航,许天祥.圆CFRP-钢复合管约束混凝土短柱轴压试验研究[J].工程力学,2017,34(6):41-50.(GUO Ying,LIU Jiepeng,MIAO Yajun,WANG Yuhang,XU Tianxiang.Experimental study on axial behavior of circular CFRP-steel composite tube confined concrete stub columns[J].Engineering Mechanics,2017,34(6):41-50.(in Chinese))
[21]WANG J Z,CHENG L,YANG J L.Compressive behavior of CFRP-steel composite tubed steel-reinforced columns with high-strength concrete[J].Journal of Constructional Steel Research,2018,150(11):354-370.
[22]PESSIKI S,HARRIES K A,KESTNER J T,SAUSE R,RICLES J M.Axial behavior of reinforced concrete columns confined with FRP jackets[J].Journal of Composites for Construction,2001,5(4):237-245.
[23]ComitéEuro-international Du Béton/Federation Internationale De La Precontrainte(CEB-FIP).CEBBulletin d’information:CEB-FIP Model Code 1990[S].London:Thomas Telford,1993.
[24]王玉银.圆钢管高强混凝土轴压短柱基本性能研究[D].哈尔滨:哈尔滨工业大学,2003:63-66.(WANG Yuyin.Axial behavior of circular high strength concrete steel tube stub columns[D].Harbin:Harbin Institute of Technology,2003:63-66.(in Chinese))
[25]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.
[26]LI B,PARK R,TANAKA H.Stress-strain behavior of high-strength concrete confined by ultra-high-and normal-strength transverse reinforcements[J].ACIStructural Journal,2001,98(3):395-406.
[27]XIAO Q G,TENG J G,YU T.Behavior and modeling of confined high-strength concrete[J].Journal of Composites for Construction,2010,14(3):249-259.
[28]TENG J G,HUANG Y L,LAM L,YE L P.Theoretical model for fiber-reinforced polymer-confined concrete[J].Journal of Composites for Construction,2007,11(2):201-210.
[2]陈肇元.高强混凝土在建筑工程中的应用[J].建筑结构,1994,(9):3-12.
[3]周绪红,刘界鹏.钢管约束混凝土柱的性能与设计[M].北京:科学出版社,2010:2-5.(ZHOU Xuhong,LIU Jiepeng.Performance and design of steel tube confined concrete members[M].Beijing:Science Press,2010:2-5.(in Chinese))
[4]张素梅,刘界鹏,马乐,邢涛.圆钢管约束高强混凝土轴压短柱的试验研究与承载力分析[J].土木工程学报,2007,40(3):24-31.(ZHANG Sumei,LIUJiepeng,MA Le,XING Tao.Axial compression test and analysis of circular tube confined HSC stub columns[J].China Civil Engineering Journal,2007,40(3):24-31.(in Chinese))
[5]XIAO Y,HE W H,CHOIK K.Confined concrete-filled tubular columns[J].Journal of Structural Engineering,2005,131(3):488-498.
[6]王庆利,赵颖华,顾威.圆截面CFRP-钢复合管混凝土结构的研究[J].沈阳建筑工程学院学报(自然科学版),2003,19(4):272-274.(WANG Qingli,ZHAOYinghua,GU Wei.Presumption on the concrete filled circular CFRP-steel composite tube structures[J].Journal of Shenyang Architecture and Civil Engineering University(Natural Science Edition),2003,19(4):272-274.(in Chinese))
[7]顾威,关崇伟,赵颖华,曹华.圆CFRP钢复合管混凝土轴压短柱试验研究[J].沈阳建筑工程学院学报(自然科学版),2004,20(2):118-120.(GU Wei,GUAN Chongwei,ZHAO Yinghua,CAO Hua.Experimental study on concentrically-compressed circular concrete filled CFRP-steel composite tubular short columns[J].Journal of Shenyang Architecture and Civil Engineering University(Natural Science Edition),2004,20(2):118-120.(in Chinese))
[8]王庆利,王金鱼,张永丹,栾德民.圆截面CFRP-钢管砼轴压短柱静力性能研究[J].沈阳建筑大学学报,2005,21(3):185-188.(WANG Qingli,WANG Jinyu,ZHANG Yongdan,LUAN Demin.Mechanical property analysis about the concentrically compressed concrete filled circular CFRP-steel tubular stub columns[J].Journal of Shenyang Architecture and Civil Engineering University,2005,21(3):185-188.(in Chinese))
[9]陶忠,庄金平,于清.FRP约束钢管混凝土轴压构件力学性能研究[J].工业建筑,2005,35(9):20-23.(TAO Zhong,ZHUANG Jinping,YU Qing.Mechanical behavior of stub columns of FRP-confined concretefilled steel tubes[J].Industrial Construction,2005,35(9):20-23.(in Chinese))
[10]TAO Z,HAN L H,ZHUANG J P.Axial loading behavior of CFRP strengthened concrete-filled steel tubular stub columns[J].Advances in Structural Engineering,2007,10(1):37-46.
[11]HU Y M,YU T,TENG J G.FRP-confined circular concrete-filled thin steel tubes under axial compression[J].Journal of Composites for Construction,2011,15(5):850-860.
[12]LU Y Y,LI N,LI S.Behavior of FRP-confined concrete-filled steel tube columns[J].Polymers,2014,6(5):1333-1349.
[13]于峰,牛荻涛,武萍,薛圣广,韩少渊.FRP约束钢管混凝土柱力学性能分析[J].哈尔滨工业大学学报,2007,39(增刊2):90-93.(YU Feng,NIU Ditao,WUPing,XUE Shengguang,HAN Shaoyuan.Analysis on mechanical behavior of FRP-confined concrete filled steel tubes[J].Journal of Harbin Institute of Technology,2007,39(Suppl.2):90-93.(in Chinese))
[14]CHOI K K,XIAO Y.Analytical model of circular CFRPconfined concrete-filled steel tubular columns under axial compression[J].Journal of Composites for Construction,2010,14(1):125-133.
[15]翟存林,魏洋,李国芬,曹兴.FRP钢复合管混凝土桥墩设计与应用研究[J].公路,2012(1),83-87.(ZHAI Cunlin,WEI Yang,LI Guofen,CAO Xing.Design and application of FRP-steel composite tube concrete piers[J].Highway,2012(1):83-87.(in Chinese))
[16]TENG J G,HU Y M,YU T.Stress-strain model for concrete in FRP-confined steel tubular columns[J].Engineering Structures,2013,49(4):156-167.
[17]DONG C X,KWAN A K H,HO J C M.Axial and lateral stress-strain model for concrete-filled steel tubes with FRP jackets[J].Engineering Structures,2016,126(11):365-378.
[18]顾威,赵颖华,贾永新.CFRP钢管混凝土长柱承载力的研究[J].工程力学,2008,25(7):147-152.(GUWei,ZHAO Yinghua,JIA Yongxin.Research on bearing capacity of long concrete-filled CFRP-steel tubular columns with axial compression[J].Engineering Mechanics,2008,25(7):147-152.(in Chinese))
[19]LI N,LU Y Y,LI S,LIU L.Slenderness effects on concrete-filled steel tube columns confined with CFRP[J].Journal of Constructional Steel Research,2018,143(4):110-118.
[20]郭莹,刘界鹏,苗亚军,王宇航,许天祥.圆CFRP-钢复合管约束混凝土短柱轴压试验研究[J].工程力学,2017,34(6):41-50.(GUO Ying,LIU Jiepeng,MIAO Yajun,WANG Yuhang,XU Tianxiang.Experimental study on axial behavior of circular CFRP-steel composite tube confined concrete stub columns[J].Engineering Mechanics,2017,34(6):41-50.(in Chinese))
[21]WANG J Z,CHENG L,YANG J L.Compressive behavior of CFRP-steel composite tubed steel-reinforced columns with high-strength concrete[J].Journal of Constructional Steel Research,2018,150(11):354-370.
[22]PESSIKI S,HARRIES K A,KESTNER J T,SAUSE R,RICLES J M.Axial behavior of reinforced concrete columns confined with FRP jackets[J].Journal of Composites for Construction,2001,5(4):237-245.
[23]ComitéEuro-international Du Béton/Federation Internationale De La Precontrainte(CEB-FIP).CEBBulletin d’information:CEB-FIP Model Code 1990[S].London:Thomas Telford,1993.
[24]王玉银.圆钢管高强混凝土轴压短柱基本性能研究[D].哈尔滨:哈尔滨工业大学,2003:63-66.(WANG Yuyin.Axial behavior of circular high strength concrete steel tube stub columns[D].Harbin:Harbin Institute of Technology,2003:63-66.(in Chinese))
[25]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.
[26]LI B,PARK R,TANAKA H.Stress-strain behavior of high-strength concrete confined by ultra-high-and normal-strength transverse reinforcements[J].ACIStructural Journal,2001,98(3):395-406.
[27]XIAO Q G,TENG J G,YU T.Behavior and modeling of confined high-strength concrete[J].Journal of Composites for Construction,2010,14(3):249-259.
[28]TENG J G,HUANG Y L,LAM L,YE L P.Theoretical model for fiber-reinforced polymer-confined concrete[J].Journal of Composites for Construction,2007,11(2):201-210.