預應力錨固系統(tǒng)的有限元分析.pdf

1、西南交通大學碩士學位論文預應力錨固系統(tǒng)的有限元分析姓名：趙通申請學位級別：碩士專業(yè)：道路與鐵道工程指導教師：左德元20031101西南交通大學碩士研究生學位論文第【l頁AbstractPrestrussmethodiswidelyusedinengineeringstructuresinwhichanchorageplaysaveryimportantrolePre—stressconcretestructureshaveahigher

2、techno—economicsindexandwide—rangingpracticabilityThekeyofdevelopmentofpre—stresstechniquesispre—stresshighstrengthsteelproductsandanchorage’Ihedesignandsclcctionofanchorageplayanimportantpartinthedesignofpost—tensionedc

3、oncretestructuresBearingstrengthofanchoragewilldirectlylnfluencetheresultofpro—stressandsecurityofstructuresThestressofAnchorsandconcretewhichbearshugepre—stressunderanchorsisrelativelywell—distributedornot，thatismeasure

4、criterionofanchorageDomestictheoreticresearchofanchorageisnotenough，fewdocumentsinthisfieldisreported，andresearchusingFEMinthisdomainisevenrarelyseeninpublicationTheinteractionincomponentsofjawviceanchorageisverycomplica

5、ted，mechanicalandgeometriccharacteristicsofthoseunderloadeffectarealsocomplexAnalyzingthoseproblemsbyusingclassicalelasticplastictheorywillmcctlotsofdifficultiesinotherwords，thesuccesspossibilitywillbeverysmallOtherwise，

6、FEMcangiveeffectiveresultswhichCallapproachprojectpracticesByusingnon—linearFEM，thisthesisconsiderscontactfrictionbetweenanchorplateandclip—pieces，contactfrictionbetweenanchorplateandunderboard，elastic—plasticnatureofanc

7、horplatematerial，establishesnon—finiteelementmodelsformonostrandanchorageandmulti—strandanchorageThestressdistributionandcharacteristicsofdeformationareanalyzedparticularlyInaddition，consideringanchor—regionofpre—stresss

8、tructurewillendurehugepart—stressundergreatpressure，sothethesisgivesthegeneraldistributionregularityofstressofanchorregionbyusingFEM，andaqualitativeanalysisispresentedThisthesis，firstly，presentstheapplicationoftheparamet

9、erizationdesignfortheconeangleofanchorsbyusingFEATheinfluenceofconeangleonthemechanicscharacteristicsoftheanchorisanalyzedparticularlySyntheticallyconsideringlimitedconeangle，reasonableangledegreesofthemodelshould650_75。

10、Secondly，thisthesispresentsthenon—linearFEManalysisresultsofmono—strandanchoroncontactfrictionproblemTheinfluenceoffractioncoefficientsonthemechanicscharacteristicsoftheanchorisanalyzedparticularlyTheresultsshowthat：thed

11、egreeofdeformationandyieldregionwilldecreaseasthefractioncocfficicntsincreasing；theinfluenceoffractioncoefficient^betweenclip—piecesandanchorplateisnloreremarkablethanf2betweenanchorplateandunderboard，theinfluenceoff2can

12、bcnegligibleConsideringthatmulti—strandanchorageiswidelyusedincivilengineeringmoreandmore，anFEMmodelforseven—strandanchoragehasbeenestablishedinthisthesistheMlmericalFOSUltSiSpYosonted，lhenler_nulf(1panddeformationthaila

13、cteristical’eanalyzedindetailFinally，thisthesisgivesalinearFEManalysisonthestressdistributioninanchorregionof“pre—tressconcretestructureAqualitativecomparisonbetveeentWOconditionswhethertilepresetholesaleconsideredisgive