1、Y1525042分類號!旦!!!密級單位代碼10618學號106270309墨宏交迫戈摯碩士學位論文論文題目；柔性纖維改性混凝土梁抗裂性能試驗研究ExperinentStudyonCrackResistanceOfFlexibleFiberReinforcedConcereteBearns研究生姓名：龔斌導師姓名、職稱：王福敏研究員申請學位門類專業(yè)名稱：工學結(jié)構工程論文答辯日期：2009年3月22日學位授予單位；重慶交通大學答辯委員會主

2、席：周建庭2009年3月評閱人：周建庭連啟濱ABSTRACTInrecentyears，thecrackproblemoftheconcreteismoreandmoreoutstandinginengineeringpracticeandalsosuchinthebridgeengineeringparticularlyitputsforwardthetesttothesafetyanddurabilityofthestructure

3、ThefiberreinforeedconcreteisakindofnewcomplexmaterialThismaterialhasexcellentcapabilitytestrainbend，crackandbearfatigueThisthesisintroducestwokindsofthefiberreinforcedconcretemechanism，namelythecompositematerialtheoriesa

4、ndthefiberspacingintervaltheories，anddeducestheformulaofthefirstcrackstrengthofextensionandtheultimatestrengthofextensionofthecompositematericalAtthesametime，Thefifteensimplysupportedbeamsmixedwiththeflexiblefiberaretest

5、edtostudythee舵ctofcrackingloadandstiffnessofbeam，andcrackresistanceofs咖cturesduetotheflexiblefiberExperimentalresultsindicatedthattheflexiblefiberCanimprovetheworkabilityofconcreteavailablythecracksofbeamarecontrolledeff

6、ectivelythewidthandlengthofcrackdecreased，thedispersibilityofcrackinbeamfaceimproved，andtheductilityofbeamincreased；andthecrackingloadofreinforcedconcretebeamisincreased，theamplifyuptoabout30％，siIIlultaneitytheultimatebe

7、arcapacityincreasedBesides，SOLID65elementinANSYSsoftwareWasusedtoanalyzeandsimulatethesebeams，acomparativeagreementbetweentheoryandexperimentWasfound111eresultsofthearticlewillenhancetheflexiblefiberreinfc，reedconcreteap