1、南京航空航天大學(xué)碩士學(xué)位論文混雜纖維增強(qiáng)高強(qiáng)混凝土力學(xué)性能的研究姓名：韓麗娟申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：道路與鐵道工程指導(dǎo)教師：余紅發(fā)20100301混雜纖維增強(qiáng)高強(qiáng)混凝土力學(xué)性能的研究IIABSTRACTFiberswithdifferentsthavebothadvantagesdisadvantages.Ffibersofdifferentpropertyacteristicareusedinconcreteperfmanceofal

2、lkindsoffibersisputintousecompletelyfunctionofholdingbackcrackstrengtheningofconcreteareachievedatdifferentarrangementinpropertyunderloadgradebygrade.InthispapercompressivestressstraincurvesFlexuralloaddeflectioncurvesof

3、allkindofconcreteweretested.TheinvestigatedconcreteincludesHSCwhichhasnofiberFRCwhichhaspolypropylenefibermodifiedpolyesterfiberHFRCwhichhasmixedpolypropylenefibersteelfibermodifiedpolyesterfibersteelfiber.TheFlexuralstr

4、engthultimateloaddeflectioncompressivestrengthstraincompressivetoughnesswerestudied.ionofconstitutiveequationonthebasisofthestressstraincurvesparametersoftheconstitutiveequationwereconfirmed.Themainconclusionsareasfollow

5、s:ComparedwiththeHSCFRCtheintroductionofhybridfiberscouldeffectivelyrestrainhighstrengthconcreteunderloadingwhenthecrackemergence.Steelfiberpolypropylenefiberpolyesterfiberinconcreteproducedbetterhybrideffectsothatthecom

6、pressiontoughnessindexis2timesthanHSC.Theconstitutiverelationcanbeintegrallyexactlyrepresentedbysegmentedequation.Amongthemtheriseinparagraphis3timesaparabolathedecreaseistherationalfractionparagraphparameterinconstituti