粘钢加固重力式桥墩的抗震性能试验研究
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摘要
制作配筋率0.2%和0.4%、配箍率0.2%的两个模型墩,先完成两模型墩的拟静力破坏试验再对其粘钢加固,并进行加固后模型墩的拟静力破坏试验.详细比较分析加固前后模型墩的破坏形态、承载力、延性与耗能能力、刚度退化等特性,验证粘钢加固能明显提高重力式桥墩抗震性能.
Two pier models whose reinforcement ratios are 0.2% and 0.4% respectively and stirrup ratio is 0.2% are made.First,the pseudo-static destructive test of the pier models is conducted,then the models are strengthened by gluing steels and the pseudo-static destructive test is done again.The failure modes,carrying capacity,ductility,energy dissipation capacity and rigidity degeneration of the original pier models and the strengthened ones are compared and analyzed in detail,and the fact that the seismic behavior of railroad bridge with gravity piers is significantly improved by gluing steels is validated.
Two pier models whose reinforcement ratios are 0.2% and 0.4% respectively and stirrup ratio is 0.2% are made.First,the pseudo-static destructive test of the pier models is conducted,then the models are strengthened by gluing steels and the pseudo-static destructive test is done again.The failure modes,carrying capacity,ductility,energy dissipation capacity and rigidity degeneration of the original pier models and the strengthened ones are compared and analyzed in detail,and the fact that the seismic behavior of railroad bridge with gravity piers is significantly improved by gluing steels is validated.
引文
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[8]Saiidi M S,Cheng Z Y.Effectiveness of composites inearthquake damage repair of reinforced concrete flaredcolumns[J].Journal of Composites for Construction,2004,8(4):306-314.
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[2]陈兴冲,朱晞.素混凝土矮墩的全过程分析[J].兰州铁道学报,1993,12(1):1-11.
[3]丁明波,陈兴冲.客运专线桥墩基础滞回特性的模型试验研究[J].兰州交通大学学报,2008,27(3):5-8.
[4]陈兴冲,丁明波,张鹏翔,等.一种钢板抗震加固桥墩的方法[P].中国:201210081383,2012.
[5]司炳君,孙治国.钢筋混凝土延性桥墩震后快速修复技术研究[J].大连理工大学学报,2010,50(1):93-98.
[6]司炳君,孙治国,杜修力,等.钢筋混凝土桥墩地震弯剪破坏机理与震后快速修复技术研究[J].土木工程学报,2011,44(7):90-99.
[7]黄照南.CFRP修复震后严重破坏钢筋混凝土桥墩抗震性能试验研究[D].大连:大连理工大学,2009.
[8]Saiidi M S,Cheng Z Y.Effectiveness of composites inearthquake damage repair of reinforced concrete flaredcolumns[J].Journal of Composites for Construction,2004,8(4):306-314.
[9]Nie J G,Wang Y H,Cai C S.Experimental research onfatigue behavior of RC beams strengthened with steelplate-concrete composite technique[J].Journal ofStructural Engineering,2011,137(7):772-781.
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