瀝青混合料細(xì)觀結(jié)構(gòu)初步分析.pdf

1、III]IILIilllllllllllllllllll：HIIIII[IY1526343分類號：U41；U2壤鄉(xiāng)太海碩士學(xué)位論文瀝青混合料細(xì)觀結(jié)構(gòu)初步分析張愛霞導(dǎo)師姓名職稱鄭傳超教授申請學(xué)位級別項(xiàng)士學(xué)科專業(yè)名稱道路與鐵道工程論文提交日期學(xué)位授予單位2009年4月28日論文答辯日期2009年5月21日長安土學(xué)答辯委員會(huì)主席王選倉教授學(xué)位論文評聞人冷培義教授李煒光副教授AbstractTraditionaldesignmethodfora

2、sphaltpavementphenomenologicallyfocusesonthemechanicalpropertiesofasphaltconcretematerialsfromamacroperspective，withanassumptionthatthematerialisisotropicandhomogeneous，whichisdifficulttevealthephysicalmechanismofmateria

3、ldeformationanddistressTheasphaltmixtureismuchmorecomplicatedInthispaperasphaltmixtureisregardedasamulti—phasecompositematerialsystem，anditsmesostructureispreliminarilysimulatedinthefollowingthreeaspectsFirstlytwodimensi

4、onalfmiteelmentmodelisestablishedforthemesostructureofasphaltmixtureinthecasesofbothsingleaggregateandmultipleaggregates，theeffectsofaggregateswithdifferentsizes，shapes，andlocationssubjectedtodifferentloadingconditionsar

5、estudiedResultsshowthatinternalstressesofdifferenttypesofasphaltmixturedependmainlyonthematerialgradationAllofthesewillprovideabasisforasphaltmixturedesignandaggregatesselectionSecondlysurfacetexturestructurehasallimport

6、antroleinthepavementperformanceThesimplemodelforstrippingofasphaltmixtureisproposedtolocatethestressdistributionsontheinterfacebetweenasphaltmaxtureandanaggregateofdifferentshapesanddepthsunderdifferentloadingsFinallythi

7、spapercomparesthenonhomogeneousMarshallspecimensandthehomogeneousMarshallspecimensthroughsplittingtestandnumericalsimulationtestdatademonstrateAthatnonhomogeneityinducesanisotrpicpropertiesForagivensegregationformularfor

8、elasticmodulusofasphaltmixtureMarshallspecimenintwodirectionsperpendicularareobtained，whichisofreferencevalueforthesegregationanalysisKeywords：asphaltmixture，meso—structure，numericalsimulationpavementsurfacetexturespliRi