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1、Y1404973分類號一UDC2密級：學(xué)校代號：10150學(xué)號：20052006戈童交歌摯碩士學(xué)位論文改性聚丙烯纖維增強混凝土抗疲勞性能的研究ResearchonFatiguePerformanceofModifiedPolypropyleneFiberReinforcedConcrete學(xué)生姓名：導(dǎo)師及職稱：學(xué)科門類：專業(yè)名稱：研究方向：申請學(xué)位級別：論文答辯日期：學(xué)位授予單位：張偉王生武教授工學(xué)工程力學(xué)抗疲勞設(shè)計碩士2008年6月9日大連交通大學(xué)大連交通大學(xué)工學(xué)碩士學(xué)位論文AbstractConcretematerialusewidelyincons
2、tructionprojectbecauseofitsmeritsincludinghighercompressivestrength，betterdurabilityandlowercost．But，asbrittlematerial，concretehasmuchlowertensilestrengthasagainstofitscompressivestrength．Thisperformanceweaknessofconcretehaslimiteditsapplicationscopetogreatextent．Recently，mixingf
3、iberintheconcretehasmadegoodprogressinsolvingthisproblem，especiallypolypropylenefiber，whichofferstheadvantageoflight，corrosionresistance，evenlydistributedandSOon，hasagoodapplicationprospect．Moreover，theresearchofflyashinconcretehasbecomeagreatimportantresearchareainthescienceofce
4、mentandconcretebecausemixesflyashinconcreteCanbringimportantbenefitinmanyaspectssuchastechnology，economy,environment，societyandSOon．Theapplicationscopeofconcretehasexpandedtohighrequestdomainofanti-fatigueandanti-impactalongwithitsapplicationgettingmoreandmorewidespreadincivileng
5、ineering．Theseprojectswithstandstochasticorperiodicloadfrequently，researchoffatigueperformanceofpolypropylenefiberinconcreteandflyashconcreteappearsthegreatimportance．Synthesizedthesituationsabove，thispaperhasselectedakindoffineperformancemodifiedpolypropylenefiberwhichismadeinCh
6、ina，studiedperformanceandfundamentalwhichWasinfluencedonfiberintwodifferentkindsofparentconcrete．Firstly，takingplainconcreteasparentconcrete，studiedstaticintensityandflexuralfatigueperformancewhichWasinfluencedonthevariationoffiberinvolume，establishedtheflexuralfatigueequationofm
7、odifiedpolypropylenefiberinconcrete，searchedtheeffectsruleofflexuralfatigueperformanceandfoundthebestleveloffibersinvolume．Secondly，takingconcretewith20％(bymass)flyashasparentconcrete，furtherstudyhasbeenmadetofindouttheperformanceinfluenceandtheeffectsruleoffiberandflyashinconcre
8、te．Effectsofmodifiedpolypropylenefiberso
