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《cfrp加固火災(zāi)后混凝土短柱抗震性能的試驗(yàn)研究》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、文章編號(hào):1000-4750(2014)08-0092-09CFRP加固火災(zāi)后混凝土短柱抗震性能的試驗(yàn)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(mén)361021;2.廈門(mén)理工學(xué)院材料科學(xué)與工程學(xué)院,廈門(mén)361024)摘要:進(jìn)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(yàn),考察了CFRP的加固量和加固方式對(duì)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(shí)用計(jì)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(huì)提高火災(zāi)后加固混凝土短柱的割線剛度。對(duì)于相同的加固量,全包CFRP柱的抗剪承載力略?xún)?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(lèi)似。關(guān)鍵詞:混凝土;短柱;火災(zāi)后;CFRP;抗震加固中圖分類(lèi)號(hào):TU375.3文獻(xiàn)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