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1、河北工程大学毕业设计（论文）毕业设计---外文翻译原作题目：FailurePropertiesofFracturedRockMassesasAnisotropicHomogenizedMedia译作题目：均质各向异性裂隙岩体的破坏特性专业：土木工程姓名：吴雄指导教师：吴雄志河北工程大学土木工程学院2012年5月21日15河北工程大学毕业设计（论文）FailurePropertiesofFracturedRockMassesasAnisotropicHomogenizedMediaIntroductionItiscommonlyacknowl
2、edgedthatrockmassesalwaysdisplaydiscontinuoussurfacesofvarioussizesandorientations,usuallyreferredtoasfracturesorjoints.Sincethelatterhavemuchpoorermechanicalcharacteristicsthantherockmaterial,theyplayadecisiveroleintheoverallbehaviorofrockstructures,whosedeformationaswell
3、asfailurepatternsaremainlygovernedbythoseofthejoints.Itfollowsthat,fromageomechanicalengineeringstandpoint,designmethodsofstructuresinvolvingjointedrockmasses,mustabsolutelyaccountforsuch‘‘weakness’’surfacesintheiranalysis.Themoststraightforwardwayofdealingwiththissituatio
4、nistotreatthejointedrockmassasanassemblageofpiecesofintactrockmaterialinmutualinteractionthroughtheseparatingjointinterfaces.Manydesign-orientedmethodsrelatingtothiskindofapproachhavebeendevelopedinthepastdecades,amongthem,thewell-known‘‘blocktheory,’’whichattemptstoidenti
5、fypoten-tiallyunstablelumpsofrockfromgeometricalandkinematicalconsiderations(GoodmanandShi1985;Warburton1987;Goodman1995).Oneshouldalsoquotethewidelyuseddistinctelementmethod,originatingfromtheworksofCundallandcoauthors(CundallandStrack1979;Cundall1988),whichmakesuseofanex
6、plicitfinite-differencenumericalschemeforcomputingthedisplacementsoftheblocksconsideredasrigidordeformablebodies.Inthiscontext,attentionisprimarilyfocusedontheformulationofrealisticmodelsfordescribingthejointbehavior.Sincethepreviouslymentioneddirectapproachisbecominghighly
7、complex,andthennumericallyuntractable,assoonasaverylargenumberofblocksisinvolved,itseemsadvisabletolookforalternativemethodssuchasthosederivedfromtheconceptofhomogenization.Actually,suchaconceptisalreadypartiallyconveyedinanempiricalfashionbythefamousHoekandBrown’scriterio
8、n(HoekandBrown1980;Hoek1983).Itstemsfromtheintuitiveideathatfromamacroscopicpointofview,a
