CFRP加固桥梁RC短柱远程协同拟动力实验
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摘要
针对已建的不能满足现有抗震规范设计要求的桥梁圆截面钢筋混凝土短柱,通过FRP加固后并在恒定轴力作用下,利用NetSLab实验平台进行国内首次整桥的远程协同拟动力实验.分析了2根CFRP加固剪切柱在地震荷载作用下的破坏现象、延性及耗能等.结果表明:CFRP加固不仅阻止了短柱的脆性剪切破坏,而且使破坏模式转化为延性弯曲破坏,使构件具有了稳定的滞回性能及耗能能力,有效地改善了短柱的抗震性能.
Since the existing circle crossing reinforcement concrete short columns of bridge can't satisfy new seismic codes,retrofitted by Fiber Reinforced Plastic and loaded with an invariable axial force,the first domestic remote collaborative pseudo-dynamic testing of a whole bridge was carried out with a platform named NetSLab.The damage phenomena,ductility and energy dissipation of two shearing columns retrofitted by Carbon Fiber Reinforced Plastic were analyzed.The results indicated that Carbon Fiber Reinforced Plastic not only prevented brittle shearing damage of reinforcement concrete short columns,but also changed the damage mode to ductile bending damage.The stable hysteretic properties,energy dissipation capacities and seismic performances of reinforcement concrete short columns were effectively improved.
Since the existing circle crossing reinforcement concrete short columns of bridge can't satisfy new seismic codes,retrofitted by Fiber Reinforced Plastic and loaded with an invariable axial force,the first domestic remote collaborative pseudo-dynamic testing of a whole bridge was carried out with a platform named NetSLab.The damage phenomena,ductility and energy dissipation of two shearing columns retrofitted by Carbon Fiber Reinforced Plastic were analyzed.The results indicated that Carbon Fiber Reinforced Plastic not only prevented brittle shearing damage of reinforcement concrete short columns,but also changed the damage mode to ductile bending damage.The stable hysteretic properties,energy dissipation capacities and seismic performances of reinforcement concrete short columns were effectively improved.
引文
[1]PRIESTLEY M J N,SEIBLE F,XIAO Y,et al.Steel jacketretrofit of short RC bridge columns for enhanced shear strength-part 1 theoretical considerations and test design[J].ACI StructureJournal,1994,91(4):394-405.
[2]PRIESTLEY M J N,SEIBLE F,XIAO Y,et al.Steel jacketretrofit of short RC bridge columns for enhanced shear strength-part 2 experimental results[J].ACI Structure Journal,1994,91(5):537-551.
[3]于清,陶忠.纤维塑料约束混凝土柱抗震性能研究综述[J].地震工程与工程振动,2002,22(2):66-71.YU Q,TAO Z.Dynamic behavior of FRP0 confined concretecolumns-state of the art[J].Earthquake Engineering and Engi-neering Vibration,2002,22(2):66-71.(In Chinese)
[4]XIAO Y,PRIESTLEY M J N,SEIBLE F.Seismic assessmentand retrofit of bridge column footing[J].ACI Structure Journal,1996,93(1):79-94.
[5]刘钧,侯杰,邱法维.钢筋混凝土独柱式桥墩的拟动力试验研究[J].工程抗震与加固改造,2006,28(5):43-48.LIU J,HOU J,QIU F W.Pseudo dynamic test research of rein-forced concrete bridge column pier[J].Earthquake Resistant En-gineering and Retrofitting,2006,28(5):43-48.(In Chinese)
[6]李贤,肖岩,毛炜烽,等.钢筋混凝土柱-钢梁节点的抗震性能研究[J].湖南大学学报:自然科学版,2007,34(2):1-5.LI X,XIAO Y,MAO W F,et al.Experimental research on seis-mic behavior of reinforced concrete column-to-steel beam jointswith bolted end-plate[J].Journal of Hunan University:NaturalSciences,2007,34(2):1-5.(In Chinese)
[7]叶列平,赵树江,李金旺,等.碳纤维布加固混凝土柱的斜截面受剪承载力计算[J].建筑结构学报,2000,21(2):59-67.YE L P,ZHAO S J,LI J W,et al.Calculation of shear strengthof concrete column strengthened with carbon fiber reinforced plas-tic sheet[J].Journal of Building Structures,2000,21(2):59-67.(In Chinese)
[8]肖岩,胡庆,郭玉荣,等.结构拟动力远程协同试验网络平台的开发研究[J].建筑结构学报,2005,26(3):122-129.XIAO Y,HU Q,GUO Y R,et al.A network platform for remotepseudo-dynamic testing[J].Journal of Building Structures,2005,26(3):122-129.(In Chinese)
[9]郭玉荣,张国伟,肖岩,等.单自由度结构远程分析及拟动力试验平台[J].湖南大学学报:自然科学版,2006,33(2):18-21.GUO Y R,ZHANG G W,XIAO Y,et al.A platform for remoteanalysis and pseudo dynamic testing of SDOF structures[J].Jour-nal of Hunan University:Natural Sciences,2006,33(2):18-21.(In Chinese)
[10]董旭华,王伟,肖岩,等.纤维塑料加固与修复RC短柱抗震性能试验[J].沈阳建筑大学学报:自然科学版,2006,22(2):252-256.DONG X H,WANG W,XIAO Y,et al.Experimental study onseismic retrofit and repair of circular reinforcement concrete shortcolumns by fiber reinforced plastic[J].Journal of ShenyangJianzhu University:Natural Sciences,2006,22(2):252-256.(In Chinese)
[2]PRIESTLEY M J N,SEIBLE F,XIAO Y,et al.Steel jacketretrofit of short RC bridge columns for enhanced shear strength-part 2 experimental results[J].ACI Structure Journal,1994,91(5):537-551.
[3]于清,陶忠.纤维塑料约束混凝土柱抗震性能研究综述[J].地震工程与工程振动,2002,22(2):66-71.YU Q,TAO Z.Dynamic behavior of FRP0 confined concretecolumns-state of the art[J].Earthquake Engineering and Engi-neering Vibration,2002,22(2):66-71.(In Chinese)
[4]XIAO Y,PRIESTLEY M J N,SEIBLE F.Seismic assessmentand retrofit of bridge column footing[J].ACI Structure Journal,1996,93(1):79-94.
[5]刘钧,侯杰,邱法维.钢筋混凝土独柱式桥墩的拟动力试验研究[J].工程抗震与加固改造,2006,28(5):43-48.LIU J,HOU J,QIU F W.Pseudo dynamic test research of rein-forced concrete bridge column pier[J].Earthquake Resistant En-gineering and Retrofitting,2006,28(5):43-48.(In Chinese)
[6]李贤,肖岩,毛炜烽,等.钢筋混凝土柱-钢梁节点的抗震性能研究[J].湖南大学学报:自然科学版,2007,34(2):1-5.LI X,XIAO Y,MAO W F,et al.Experimental research on seis-mic behavior of reinforced concrete column-to-steel beam jointswith bolted end-plate[J].Journal of Hunan University:NaturalSciences,2007,34(2):1-5.(In Chinese)
[7]叶列平,赵树江,李金旺,等.碳纤维布加固混凝土柱的斜截面受剪承载力计算[J].建筑结构学报,2000,21(2):59-67.YE L P,ZHAO S J,LI J W,et al.Calculation of shear strengthof concrete column strengthened with carbon fiber reinforced plas-tic sheet[J].Journal of Building Structures,2000,21(2):59-67.(In Chinese)
[8]肖岩,胡庆,郭玉荣,等.结构拟动力远程协同试验网络平台的开发研究[J].建筑结构学报,2005,26(3):122-129.XIAO Y,HU Q,GUO Y R,et al.A network platform for remotepseudo-dynamic testing[J].Journal of Building Structures,2005,26(3):122-129.(In Chinese)
[9]郭玉荣,张国伟,肖岩,等.单自由度结构远程分析及拟动力试验平台[J].湖南大学学报:自然科学版,2006,33(2):18-21.GUO Y R,ZHANG G W,XIAO Y,et al.A platform for remoteanalysis and pseudo dynamic testing of SDOF structures[J].Jour-nal of Hunan University:Natural Sciences,2006,33(2):18-21.(In Chinese)
[10]董旭华,王伟,肖岩,等.纤维塑料加固与修复RC短柱抗震性能试验[J].沈阳建筑大学学报:自然科学版,2006,22(2):252-256.DONG X H,WANG W,XIAO Y,et al.Experimental study onseismic retrofit and repair of circular reinforcement concrete shortcolumns by fiber reinforced plastic[J].Journal of ShenyangJianzhu University:Natural Sciences,2006,22(2):252-256.(In Chinese)
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