瀝青路面長壽命加鋪層材料和結(jié)構(gòu)疲勞特性研究.pdf

1、東南大學(xué)碩士學(xué)位論文瀝青路面長壽命加鋪層材料和結(jié)構(gòu)疲勞特性研究姓名：張勇申請學(xué)位級別：碩士專業(yè)：道路與鐵道工程指導(dǎo)教師：錢振東20090501東南大學(xué)碩士學(xué)位論文ABSTRACT1’heearlydestructionofexpresswayisseriousinChina。whichmakeshighwayconstructionenterintothemaintenanceandrepairstageprematurelyTheex

2、istingdemandfortransportServiCesisunabletobesatisfiedbyearlyconstructedhighwaybecauseofthetrafficgrowthwitheconomicandsocialdevelopmentSOthehighwaysneedbereconstructedinOUrcountryimminentlyHowtopreventearlydamagesofnewpa

3、vementsanddelayitsSg州celifehaveba30meCun蜘tresearchemphasesInthispaperforthelonglifoasphaltoverlaysontheoldasphaltpavement，furtherresearchasthefollowingaspectswereimplementedonfatigueperformancesofthematerialsandstructure

4、sFirstatthebasisofinvestigationsandsummariesonexistingandforthcominglong—lifepavementathomeandabroadthecausesoflongservicelifeanddesignindexesoflonglifepavementwereanalyzedThenastructurecombinationformwasproposedforlong—

5、lifeoverlaysinthepaperthemechanicalcharacteristicsofwhichwereanalyzedbasedonelasticlayersystemtheoryThematerialssuitedforthemechanicalcharacteristicswereprovidedforthestructurecombinationformoflonglifeoverlaysSecondthree

6、kindsofgradedSBSmodifiedasphaltmixtureswereproposedforthelonglifeoverlaysinthispaperthenmixdesignwasdone，andtheoptimumasphaltcontentwasdeterminedConsideringtheneedofantidistortioncapacityfortheoverlaysperformancetestingw

7、ascarriedoutbyruttingtestThudaftercomprehensivecomparisonWascarriedoutonthefatiguetest，theindoor4pointtrabecularbendingfatiguetestWasperformedontheUTMtoinvestigatethefatiguebehaviorofoverlaysmixturesFurtheranddemiledrese

8、archwasstudiedontestconditionsandtestparametersandthewholefatiguetestschemeWasproposedfortheoverlaysmaterialsAimingtomorecorrectlypredictthefatiguepropertyoftheoverlays，thefatiguetestofcompoundbeamswhichWCaeconsistofdiff

9、erentverticalpositions’mixturesofoverlaysWascarriedoutalsoontheUTM，theirrespectivefatiguelifepredictingequationswcreobtainedbyregressionThefatigueperformanceoftheseasphaltmixtureswasalsoevaluatedusingtheaccumulativedissi

10、patedenergytheoryFinallytheADINAfiniteelementmethodwasadoptedtosimulatetheoverlayscrackpropagation，andtheinfluencesofoldasphaltpavementdamagesforasphaltoverlayswcreanalizedinthepaperThefunctionofStressIntensityFactorwith

11、depthofcrackpropagationWasfitted謝thpolynomialthenthefatiguelifeofthelonglifeoverlaysonoldasphaltpavementwaspredictedaccordingtOParisformula，whichisusefulfordesignoflonglifeoverlaysKeywords：Long—lifepavement；Asphaltoverla