資源描述:
《重度受損混凝土梁修復(fù)后抗剪性能試驗(yàn)研究》由會(huì)員上傳分享,免費(fèi)在線(xiàn)閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、第39卷第1期四川建筑科學(xué)研究2013年2月SichuanBuildingScience75重度受損混凝土梁修復(fù)后抗剪性能試驗(yàn)研究崔熙光,馬楠,武莽(1.沈陽(yáng)建筑大學(xué),遼寧沈陽(yáng)110168;2.大連市建筑工程質(zhì)量檢測(cè)中心有限公司,遼寧大連116021)摘要:針對(duì)建筑抗震設(shè)防目標(biāo)“小震不壞、中震可修、大震不倒”中“中震可修”情況,以重度受損鋼筋混凝土梁為對(duì)象,研究其經(jīng)加固修復(fù)后的抗剪性能。制作4根模擬重度受損鋼筋混凝土框架梁端的倒T型試件,采用灌漿料全截面置換受損區(qū)域混凝土并外部環(huán)貼碳纖維布的復(fù)合加固方
2、法對(duì)其進(jìn)行加固修復(fù),通過(guò)施加低周期往復(fù)荷載試驗(yàn),分析其受剪承載力。本文部分作者已對(duì)正截面承載能力有所研究,這里側(cè)重研究斜截面承載能力。試驗(yàn)結(jié)果表明,修復(fù)后梁的受剪承載力顯著提高;灌漿料應(yīng)用于全截面加固,可很好地與原混凝土共同工作;碳纖維布不僅有效提高構(gòu)件受剪承載力,還限制裂縫的開(kāi)展。試驗(yàn)結(jié)果與理論計(jì)算對(duì)比分析,得出修復(fù)后梁受剪承載力提高幅度,驗(yàn)證此復(fù)合加固方法的可行性,為工程實(shí)踐提供試驗(yàn)依據(jù)。關(guān)鍵詞:重度受損;鋼筋混凝土梁;碳纖維布;灌漿料;抗剪性能中圖分類(lèi)號(hào):TU375.1文獻(xiàn)標(biāo)志碼:A文章編號(hào):1
3、008—1933(2013)01—075—03ExperimentalinvestigationontheshearperformanceofrepairedseriouslydamagedreinforcedconcretebeamsCUIXiguang,MANan,WUMangz(1.ShenyangJianzhuUniversity,Shenyang110168,China;2.DalianCenterofConstructionEngineeringQualityInspectionLTD.,
4、Dalian116021,China)Abstract:Forthesituationof“repairableinmoderateearthquake’’outofbuildingseismicfortificationgoal“notbadinsmall.earthquake,repairableinmoderateearthquakeandnotcollapseinbigeaahquake”,takingreinforcedconcretebeamswhichareseriouslydamage
5、dastheresearchsubjects,itisresearchedtheshearperformanceoftherepairedbeams.Producedfourinverted·Tspecimenswhichsimulatetheseriouslydamagedreinforcedconcreteframebeams,usinggroutingmaterialtoreplacethedamagedconcreteofthewh0leCROSS—sectionareaandpastingC
6、FRPonthesurfacetorepairthebeams.a(chǎn)nalyzetheshearstrengthbylow·cyclerepeatedload.Thecarryingcapacityofnormalsectionhasbeenstudiedbysomeauthorsofthisarticle,andthefocusofthisarticleisthecarryingcapacityofobliquesection.Theresultsshowthattheshearstrengthofr
7、epairedbeamsimprovessignificantly;groutingmaterialusedinthewholecross·sectionCanbeverygoodtoworkwiththeoriginalconcrete;andCFRPnotonlyimprovestheshearstrengthofbeams,alsolimitsthecrackstocarryout.Comparedexperimentalresultswiththetheoreticalresults,obta
8、inedshearstrengthincreaserate,verifythefeasibilityofthiscompositereinforcement,tOprovideexperimentalbasisforengineeringpractice.Keywords:seriousdamage;reinforcedconcretebeam;CFRP;groutingmaterial;shearperformance結(jié)構(gòu)加固修復(fù)方法,對(duì)破損結(jié)構(gòu)構(gòu)件進(jìn)