玄武岩纤维与碳纤维加固短柱抗震试验研究
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摘要
对5根采用玄武岩纤维布和碳纤维布加固的混凝土短柱和1根对比柱进行了低周反复荷载试验.试验表明,玄武岩纤维布环向包裹加固能显著改变混凝土短柱的破坏形态,提高混凝土短柱的抗剪承载力、延性和耗能能力.相同工况下,玄武岩纤维布加固短柱的抗震性能与碳纤维布加固的短柱相近.玄武岩纤维布因低廉的价格和较好的综合力学性能,在抗震加固领域将有较好的应用前景.
Low cyclic loading test is conducted on one comparative short column and five reinforced concrete(RC) short columns strengthened with basalt fiber reinforced plastic(BFRP) and carbon fiber reinforced plastic(CFRP).The tests show that failure modes,shear strength,ductility and energy dissipation are improved and increased for specimens strengthened with BFRP.On the same condition,various short columns strengthened with BFRP and CFRP give similar seismic performance.But BFRP has a good perspective for its low cost and good comprehensive mechanical properties in seismic strengthening field.
Low cyclic loading test is conducted on one comparative short column and five reinforced concrete(RC) short columns strengthened with basalt fiber reinforced plastic(BFRP) and carbon fiber reinforced plastic(CFRP).The tests show that failure modes,shear strength,ductility and energy dissipation are improved and increased for specimens strengthened with BFRP.On the same condition,various short columns strengthened with BFRP and CFRP give similar seismic performance.But BFRP has a good perspective for its low cost and good comprehensive mechanical properties in seismic strengthening field.
引文
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[2]Saadatmanesh H,Ehsani MR,Jin LL.Repair of earthquake-damaged RC columns with FRP wraps[J].ACI StructuralJournal,1997,94(29):206.
[3]朱吉顶,刘晓宁.碳纤维混凝土短柱提高桥梁承载力的研究[J].武汉理工大学学报,2008,30(11):144.ZHU Jiding,LIU Xiaoning.Research on carbon fiberreinforced concrete short column of the bridge[J].Journal ofWuhan University of Technology,2008,30(11):144.
[4]刘铁军,梁超锋,欧进萍.纤维增强钢筋混凝土柱的抗震性能试验研究[J].地震工程与工程振动,2009,29(3):32.LIU Tiejun,LIANG Chaofeng,OU Jinping.Research onseismic behavior of fiber reinforced concrete columns[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(3):32.
[5]周长东,黄承逵.玻璃纤维聚合物加固混凝土柱抗震性能研究[J].地震工程与工程振动,2006,38(3):427.ZHOU Changdong,HUANG Chengkui.Investigation on seismicresistance behavior of concrete columns strengthened withGFRP[J].Journal of Earthquake Engineering and EngineeringVibration,2006,38(3):427.
[6]Sim J,Park C,Moon DY.Characterstics of basalt fiber as astrengthening material for concrete structures[J].Composites:Part B,2005,36(6/7):504.
[7]欧阳利军,丁斌,陆洲导.玄武岩纤维及其在建筑结构加固中的应用研究进展[J].玻璃钢/复合材料,2010(3):84.OUYANG Lijun,DING Bin,LU Zhoudao.BFRP and itsapplication review in structural strengthening[J].FRP/CM,2010(3):84.
[8]Lopresto V,Leone C,De Iorio I.Mechanical characterisationof basalt fiber reinforced plastic[J].Composites:Part B,2011,42(4):717.
[9]Kim Y H,Yang D H,Yoon S W.A study on the mechanicalproperties comparison for the composites application of basaltfibers with GFRP[J].Advanced Science Letters,2011,4(4/5):1633.
[10]姚振纲,刘祖华.建筑结构试验[M].上海:同济大学出版社,2004.YAO Zhengang,LIU Zhuhua.Test of building structure[M].Shanghai:Tongji University Press,2004.
[11]史庆轩,杨坤,白力更,等.高强箍筋约束高强混凝土柱抗震性能试验研究[J].土木工程学报,2011,44(12):9.SHI Qingxuan,YANG Kun,BAI Ligeng,et al.Experimentalresearch on seismic behavior of recycled concrete framecolumns[J].China Civil Engineering Journal,2011,44(12):9.
[12]白国良,刘超,赵洪金,等.再生混凝土框架柱抗震性能试验研究[J].地震工程与工程振动,2011,31(1):61.BAI Guoliang,LIU Chao,ZHAO Hongjin,et al.Experimentalresearch on seismic behavior of recycled concrete framecolumns[J].Journal of Earthquake Engineering andEngineering Vibration,2011,31(1):61.
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