壩基軟弱巖體的非線性蠕變損傷本構模型及其工程應用.pdf

1、山東大學碩士學位論文壩基軟弱巖體的非線性蠕變損傷本構模型及其工程應用姓名：楊文東申請學位級別：碩士專業(yè)：巖土工程指導教師：張強勇20080518ABSTRACTABSTRACTWiththeimplementofexploitationofwestregioninourcountryandthestructuralreadjustmentoftheelectricpower，numbersofhigharchdamscomeforthT

2、heengineeringgeologicalconditionofthedamfoundationiscomplicated，andtherearelotsofdiscontinuousweakinterlayer，alterationzoneandsoftrockbeltUnderthelongtimeeffectsofexcavationload，seepageflowload，temperatureloadandseismicl

3、oad，creepdeformationinweakrockofthedamfoundationwillaffecttheconstructionsecurityandstabilityofthedamTherefore，it’Simportantandvaluabletostudyofthecreepdamagemechanicscharacterandengineeringstabilityoftherocknearthedamfo

4、undationofhigharchdamBasedontheresultofthedeformationtestincenterholeandthebearingplatecompressivecreeptestinsite，thecreepdamagemechanismofrockisinvestigatedwiththeoreticalanalysisandnumericalsimulationinthestudyInthisdi

5、ssertation，themaininvestigationworkfocusesonthefollowingaspectsFirstly，effectsofweaknessoftherockparametersareconsideredandacreepdamagemodelwhichhasvariableparametersisproposedInthismodelthecreepparametersoftherockaregra

6、duallyweakened，theunsteadycreepparametersreflectthedeteriorationprocessofthematerialcharacterdirectlySecondlv，thecentraldifferenceequationinthree—dimensionalconditionofthiscreepdamageconstitutivemodelisdeducedByadoptingt

7、hesecondarydevelopmentroutineinterfaceofsoftwarefastLagrangiananalysisofcontinua(FLAC3I))，thenumericalanalysiscodeofthiscreepdamagemodelisinvestigatedanddevelopedusingCandFISHThirdly，throughauniaxialcompressionnumericale

8、xample，thecreepdamagemechanicscharactersofthemodelisanalysedTheinfluenceonthecreepCHIVeofthedamagevariableandthedamageparametersisanalyzedFourthly，basedonthismodel，thecreepdamagemechanicsparametersaregotwithnumericalback

9、inversionmethodFinally，theexcavationandcreepdamagestabilityoftheslopeatDagangshanhydropowerstationareanalyzedTheexcavateddistortion，characterofstress，plasticzoneanddamagezonedistributioncharacterareachievedThestabilityof