資源描述：
《橋梁加固中溝槽植筋新舊混凝土界面 抗剪性能試驗(yàn)研究.pdf》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第33卷第6期公路交通科技Vol．33No．62016年6月JournalofHighwayandTransportationResearchandDevelopmentJun.2016doi:10．3969/j．issn．1002-0268．2016．06．011橋梁加固中溝槽植筋新舊混凝土界面抗剪性能試驗(yàn)研究112姜海波,方鑫,郭文華(1.廣東工業(yè)大學(xué)土木與交通工程學(xué)院,廣東廣州510006;2.廣東省公路勘察規(guī)劃設(shè)計(jì)院股份有限公司,廣東廣州510507)摘要:本文針對溝槽植筋新舊混凝土界面抗剪性能進(jìn)行試驗(yàn)研究。該界面
2、處理方式已在佛開高速多座舊橋加固中采用。以界面處理方式、溝槽尺寸、配筋率作為試驗(yàn)參數(shù),研究了該界面的開裂荷載、抗剪承載力、剪切滑移、剪脹、破壞形態(tài)。試驗(yàn)結(jié)果表明試件抗剪承載力隨溝槽寬度、植筋率的增加而增加,設(shè)置溝槽的試件抗剪能力相比鑿毛粗糙處理有所提高,試件的延性隨植筋率的增加而增加。通過與美國ACI、AASHTOLRFD規(guī)范中植筋新舊混凝土界面抗剪承載力公式計(jì)算值的對比,認(rèn)為美國ACI規(guī)范可以用于計(jì)算溝槽植筋新舊混凝土界面抗剪承載力,并給出了建議取值摩擦系數(shù)μ=1．0。關(guān)鍵詞:橋梁工程;溝槽植筋;試驗(yàn)研究;新舊混凝土;抗
3、剪性能中圖分類號:TU375．102文獻(xiàn)標(biāo)識碼:A文章編號:1002-0268(2016)06-0068-08ExperimentalSudyonShearBehaviorofGroovedInterfacebetweenNewlyPouredandExistingConcretewithReinforcementinBridgeRehabilitation112JIANGHai-bo,FANGXin,GUOWen-hua(1.SchoolofCivilandTransportationEngineering,Guangd
4、ongUniversityofTechnology,GuangzhouGuangdong510006,China;2.GuangdongProvincialHighwayPlanningandDesignInstituteCo.,Ltd.,GuangzhouGuangdong510507,China)Abstract:Theshearbehaviorofgroovedinterfacewithreinforcementbetweenexistingconcreteandnewlypouredconcreteisexperi
5、mentallyresearched,whichhasbeenadoptedintherehabilitationprojectofseveraloldbridgesinFoshan-Kaipingexpressway.Takinginterfacetype,groovesizeandreinforcementratioasthetestingparameters,thecrackingload,shearcapacity,shearslippage,sheardilation,andfailuremodesinthesp
6、ecimensoftheinterfaceareinvestigated.Thetestresultshowsthat(1)theshearcapacityofspecimensincreaseswiththeincreasingofthewidthofthegrooveandreinforcementratio;(2)thegroovescutontheconcretesurfacecanimprovetheshearcapacitycomparingwiththeroughenedsurface;(3)theducti
7、lityofspecimensenhanceswiththeincreasingofreinforcementratio.ThetestresultiscomparedwiththecalculatedinterfaceshearstrengthbetweennewlypouredandexistingconcretewithtransversereinforcementbyprovisionsofACIandAASHTOLRFD.ItisthoughtthatTheACIspecificationcanbeusedtoe
8、stimatetheinterfaceshearstrengthbetweennewlypouredandexistingconcrete,andthefrictioncoefficientμissuggestedtobe1．0.Keywords:bridgeengineering;groovedint
