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1、文章編號：1000-4750(2014)08-0092-09CFRP加固火災(zāi)后混凝土短柱抗震性能的試驗研究徐玉野1，林燕卿1，楊清文1，林碧蘭2(1.華僑大學(xué)土木工程學(xué)院，廈門361021；2.廈門理工學(xué)院材料科學(xué)與工程學(xué)院，廈門361024)摘要：進行了1根未受火混凝土短柱、1根火災(zāi)后混凝土短柱、1根CFRP加固未受火混凝土短柱和3根CFRP加固火災(zāi)后混凝土短柱的擬靜力試驗，考察了CFRP的加固量和加固方式對火災(zāi)后混凝土短柱抗震加固效果的影響情況，建議了CFRP加固火災(zāi)后混凝土柱抗剪承載力的實用計算方法。研究結(jié)果表明：外包CFRP加固可將未受
2、火混凝土短柱的抗剪承載力提高21.8%、可將火災(zāi)后混凝土短柱的抗剪承載力提升至未受火試件的111.2%~117.1%、可提高受火前后短柱的極限變形能力和累積滯回耗能。與未受火試件相比，外包CFRP不會提高火災(zāi)后加固混凝土短柱的割線剛度。對于相同的加固量，全包CFRP柱的抗剪承載力略優(yōu)于條帶包裹柱。受火前、后和外包CFRP加固前、后混凝土短柱的滯回規(guī)則均類似。關(guān)鍵詞：混凝土；短柱；火災(zāi)后；CFRP；抗震加固中圖分類號：TU375.3文獻標(biāo)志碼：Adoi:10.6052/j.issn.1000-4750.2013.02.0230EXPERIMENT
3、ALSTUDYONSEISMICPERFORMANCEOFCONCRETESHORTCOLUMNSAFTERFIREANDSTRENGTHENEDWITHCFRPXUYu-ye1,LINYan-qing1,YANGQing-wen1,LINBi-lan2(1.CollegeofCivilEngineering,HuaqiaoUniversity,Xiamen361021,China;2.CollegeofMaterialsScienceandEngineering,XiamenUniversityofTechnology,Xiamen36102
4、4,China)Abstract:Thepseudo-statictestsofoneconcreteshortcolumn(CSC)withoutfire,oneCSCafterfire,oneCSCwithoutfireactionandstrengthenedwithCFRP,andthreeCSCsafterfireandstrengthenedwithCFRPwerecarriedouttoinvestigatetheinfluenceofCFRPusageandwrappingmanneronstrengthenedseismicp
5、erformanceofCSCsafterfire.ApracticalmethodtocalculatetheshearstrengthofconcretecolumnsafterfireandstrengthenedwithCFRPwassuggested.ResultsshowthattheshearstrengthofCSCswrappedwithCFRPisincreasedby21.8%comparedwiththosewithoutwrapping.TheshearstrengthofCSCsfirstlyexposedtofir
6、efollowedbywrappingwithCFRPisabout111.2%~117.1%ofthosewithouteitherfireactionorwrapping.CFRPwrappingcanenhancetheultimatedeformationandhystereticenergydissipationofCSCsbothwithoutfireactionandafterfire,butcomparingtothosewithoutfireaction,CFRPwrappingcan’tincreasethesecantst
7、iffnessofCSCsafterfire.ForthesameCFRPusage,theshearstrengthofcolumnswrappedentirelyisslightlybetterthanthosewrappedwithstrips.ThehystereticrulesofCSCsforcaseswithoutfireaction,afterfire,withoutstrengtheningandwithstrengtheningaresimilar.Keywords:concrete;shortcolumn;afterfir
8、e;CFRP;seismicstrengthening———————————————收稿日期：2013-02-21；修改日期：2013-05-15基金
