壩基軟弱巖體的非線性蠕變損傷本構(gòu)模型及其工程應(yīng)用.pdf

1、山東大學(xué)碩士學(xué)位論文壩基軟弱巖體的非線性蠕變損傷本構(gòu)模型及其工程應(yīng)用姓名：楊文東申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：巖土工程指導(dǎo)教師：張強(qiáng)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