![[雙語翻譯]--外文翻譯--三維空間應(yīng)用彌散裂紋法對大體積混凝土的性能影響（譯文）](https://static.zsdocx.com/FlexPaper/FileRoot/2020-10/9/22/b9e8faeb-75b1-4826-821b-2f7eef94f92d/pic1.gif)
簡介：中文中文2635字出處出處MIRZABOZORGH,GHAEMIANMBEHAVIOROFMASSCONCRETEUSINGSMEAREDCRACKAPPROACHINTHREEDIMENSIONALPROBLEMSJICF11ITALY,2005三維空間應(yīng)用彌散裂紋法對大體積混凝土的性能影響HMIRZABOZORG，MGHAEMIAN摘要一種彌散裂紋的方法,建立了大體積混凝土在三維空間的靜態(tài)和動態(tài)行為。該模型模擬了拉伸斷口大量混凝土和附屬物質(zhì)預(yù)先軟化行為,軟化啟動、斷裂節(jié)能效果和應(yīng)變速率下動態(tài)負(fù)載。結(jié)果表明,該模型可以收到良好的效果,和得到在對應(yīng)靜載荷作用現(xiàn)有的數(shù)據(jù)下的裂紋剖面?？紤]到其非線性抗震性能。分析了MORROWPOINT大壩包括其交互效應(yīng)。結(jié)果發(fā)現(xiàn),形成的裂紋剖面和最大主應(yīng)力的輪廓曲線相當(dāng)吻合，并且在分析過程中沒有數(shù)值不穩(wěn)定的情況發(fā)生。1、引言幾個二、三維空間的數(shù)值模型已經(jīng)開發(fā)用于混凝土壩地震安全性評價。ELAIDIANDHALL考慮了使用了該彌散裂紋模型的混凝土重力大壩在非線性地震中的反應(yīng)效果。結(jié)果發(fā)現(xiàn),引起的裂紋剖面是不切實際的，原因在于使用的彌散裂紋模型型號降低了強度標(biāo)準(zhǔn)。VARGASLOLIANDFENVES則考慮了松平大壩使用彌散裂縫的模型后在脆性斷裂準(zhǔn)則下的地震反應(yīng)。BHATTACHRJEEANDLEGER4,5AND6使用了一種彌散裂紋模型用于分析在靜態(tài)和動態(tài)加載條件混凝土重力壩情況。GHRIBANDTINAWI7、8用損傷力學(xué)的方法研究混凝土重力壩在靜力和地震反應(yīng)時的分析理論。HALL9提出了一個特殊的彌散裂紋模型同時模擬壩體和垂直縫施工的非線性行為。GHAEMIAN和GHOBARAH10,開發(fā)了一種解決方案分析在地震荷載作用下的混凝土重力壩。這種方法被稱作動搖法。已有的方法是利用非線性地震反應(yīng)在二維空間分析混凝土壩GHAEMIAN11和GHOBARAH。GUANGLUNETAL12使用在BHATTACHARJEEANDLEGER4模型基礎(chǔ)上延伸增加咬合能力的彌散裂紋的模型。AHMADIETAL13提出了一種模型來模擬拱壩垂直縫施工時的靜態(tài)和動態(tài)行為。GUNN14和15用損傷力學(xué)理論研究壩體在三維靜力荷載作用下這里在這里，E和Υ分別是初始各方向的彈性模量和泊松比；Η1，Η2和Η3是三個的主要方向軟化彈性模量與初始各向同性彈性模量之間的比率；Β12Β23Β13是與主方向一致的切應(yīng)力分子。在靜態(tài)和動態(tài)作用下的斷裂應(yīng)力應(yīng)滿足能量守恒定律BHATTACHARJEEANDGHOBARAH4,5AND6。在損傷力學(xué)理論提出的觀念GUNN14AND15用于了軟化階段建立剪切剛度變化。在公式3里的剪切應(yīng)力因子由以下確定
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![[雙語翻譯]--外文翻譯--三維空間應(yīng)用彌散裂紋法對大體積混凝土的性能影響（原文）](https://static.zsdocx.com/FlexPaper/FileRoot/2020-10/9/22/0ebacca9-829e-40f9-a383-3ac4ac762189/pic1.gif)
簡介：1BEHAVIOROFMASSCONCRETEUSINGSMEAREDCRACKAPPROACHINTHREEDIMENSIONALPROBLEMSHMIRZABOZORG1ANDMGHAEMIAN11DEPARTMENTOFCIVILENGINEERING,SHARIFUNIVERSITYOFTECHNOLOGY,POBOX113659313,TEHRAN,IRANABSTRACTASMEAREDCRACKAPPROACHHASBEENPROPOSEDTOMODELTHESTATICANDDYNAMICBEHAVIOROFMASSCONCRETEINTHREEDIMENSIONALSPACETHEPROPOSEDMODELSIMULATESTHETENSILEFRACTUREONTHEMASSCONCRETEANDCONTAINSPRESOFTENINGBEHAVIOR,SOFTENINGINITIATION,FRACTUREENERGYCONSERVATIONANDSTRAINRATEEFFECTSUNDERDYNAMICLOADSITWASFOUNDTHATTHEPROPOSEDMODELGIVESEXCELLENTRESULTSANDCRACKPROFILESCOMPARINGWITHTHEAVAILABLEDATAUNDERSTATICLOADSMORROWPOINTDAMWASANALYZEDINCLUDINGDAMRESERVOIRINTERACTIONEFFECTSTOCONSIDERITSNONLINEARSEISMICBEHAVIORITWASFOUNDTHATTHERESULTEDCRACKPROFILESAREINGOODAGREEMENTWITHTHECONTOUROFMAXIMUMPRINCIPALSTRESSESANDNONUMERICALINSTABILITYOCCURREDDURINGTHEANALYSIS1INTRODUCTIONSEVERALNUMERICALMODELSHAVEBEENDEVELOPEDFORSEISMICSAFETYEVALUATIONOFCONCRETEDAMSINTWOANDTHREEDIMENSIONALSPACEELAIDIANDHALL1AND2CONSIDEREDTHENONLINEARSEISMICRESPONSEOFCONCRETEGRAVITYDAMSUSINGTHESMEAREDCRACKMODELITWASFOUNDTHATTHERESULTEDCRACKPROFILESAREUNREALISTICDUETOUSINGTHESIZEREDUCEDSTRENGTHCRITERIONSRSINTHEPROPOSEDSMEAREDCRACKMODELVARGASLOLIANDFENVES3CONSIDEREDTHESEISMICRESPONSEOFPINEFLATDAMUSINGTHESMEAREDCRACKMODELWITHTHEBRITTLEFRACTURECRITERIONBHATTACHRJEEANDLEGER4,5AND6USEDASMEAREDCRACKMODELTOANALYZECONCRETEGRAVITYDAMSINSTATICANDDYNAMICLOADINGCONDITIONSGHRIBANDTINAWI7AND8USEDTHEDAMAGEMECHANICSTHEORYINSTATICANDSEISMICANALYSISOFCONCRETEGRAVITYDAMSHALL9PROPOSEDASPECIALSMEAREDCRACKMODELTOSIMULATENONLINEARBEHAVIOROFTHEDAMBODYANDVERTICALCONSTRUCTIONJOINSSIMULTANEOUSLYGHAEMIANANDGHOBARAH10DEVELOPEDASOLUTIONSCHEMETOANALYZECONCRETEGRAVITYDAMSINSEISMICLOADSTHISMETHODISCALLEDSTAGGEREDMETHODTHEDEVELOPEDMETHODWASUSEDINNONLINEARSEISMICANALYSISOFCONCRETEDAMSINTWODIMENSIONALSPACEGHAEMIANANDGHOBARAH11GUANGLUNETAL12USEDTHESMEAREDCRACKMODELDEVELOPEDINBHATTACHARJEEANDLEGER4WITHREMESHINGCAPABILITYAHMADIETAL13PROPOSEDAMODELTOSIMULATETHESTATICANDDYNAMICBEHAVIOROFVERTICALCONSTRUCTIONJOINTSINARCHDAMSGUNN14AND15USEDTHEDAMAGEMECHANICSTHEORYTOCONSIDERTHEEFFECTOFNONLINEARBEHAVIOROFTHEDAMBODYUNDERSTATICLOADSINTHREEDIMENSIONALPROBLEMSESPANDARANDLOTFI16COMPAREDTHEPERFORMANCEOFTHESMEAREDCRACKMODELANDELASTOPLASTICMODELTOCONSIDERTHENONLINEARBEHAVIOROFDAMBODYINTHREEDIMENSIONALSPACEMIRZABOZORGETAL17EXTENDEDTHESTAGGEREDDISPLACEMENTMETHODDEVELOPEDINGHAEMIANANDGHOBARAH10TOSOLVETHETHREEDIMENSIONALCOUPLEDPROBLEMSINTIMEDOMAINLOTFIANDESPANDAR18USEDANONORTHOGONALSMEAREDCRACKWITHADISCRETECRACKMODELTOSIMULATETHENONLINEARBEHAVIOROFDAMBODYANDVERTICALCONSTRUCTIONJOINSINARCHDAMS,SIMULTANEOUSLYINTHEPRESENTARTICLE,ATHREEDIMENSIONALSMEAREDCRACKAPPROACHISPROPOSEDTOMODELTHETENSILEFRACTUREINSTATICANDDYNAMICCONDITIONSTHEPROPOSEDMODELINCLUDESVARIOUSASPECTSTOSIMULATETHENONLINEARBEHAVIOROFMASSCONCRETEINCONCRETEDAMS2CONSTITUTIVELAWOFMASSCONCRETETHERELATIONSHIPOFTHESTRESSANDSTRAINVECTORSATTHEPRESOFTENINGPHASEISGIVENAS3THECONCEPTUSEDINDAMAGEMECHANICSTHEORYPRESENTEDINGUNN14AND15HASBEENEMPLOYEDTOSETUPSHEARSTIFFNESSCHANGESDUETOSOFTENINGPHASETHESHEARRETENSIONFACTORSINEQN3AREDETERMINEDASFOLLOWING??????????????321221213213212211122DD1ΗΗΗΥΗΥΗΕΕΕΗΗΥΗΕΕΕΗΕΗΥΒ??????????????321232321321323322232DD1ΗΗΗΥΗΥΗΕΕΕΗΗΥΗΕΕΕΗΕΗΥΒ??????????????321231312312313311132DD1ΗΗΗΥΗΥΗΕΕΕΗΗΥΗΕΕΕΗΕΗΥΒ321331232221221DDΗΗΗΥΗΗΥΗΗΥΗΗΥ????4THECOAXIALROTATINGCRACKMODELHASBEENUSEDTOSIMULATETHEBEHAVIOROFTHECRACKEDELEMENTTHECRACKCLOSING/REOPENINGCRITERIONISBASEDONTHEVALUEOFPRINCIPALSTRAINSINWHICHTHETOTALSTRAINCANBEDECOMPOSEDINTOTHETWOCOMPONENTSOFELASTICANDRESIDUALSTRAINGIVENASGHRIBANDTINAWI7AND83FINITEELEMENTIMPLEMENTATIONOFTHEPROPOSEDMODELINTHEPRESENTARTICLE,20NODEISOPARAMETRICELEMENTHASBEENUSEDINFINITEELEMENTIMPLEMENTATIONTHESTIFFNESSMATRIXANDALLOFTHEOTHERRELATEDCOMPONENTSHAVEBEENCOMPUTEDBASEDON333GAUSSIANINTEGRATIONPOINTSALLOFTHERELATEDALGORITHMSANDSTATEDETERMINATIONOFELEMENTSAREBASEDONTHEAVERAGERESPONSEOFTHEELEMENTWHICHISCOMPUTEDWITHAVERAGINGTHECOMPUTEDSTRAINSWITHINGAUSSIANPOINTS4NUMERICALRESULTS41EXAMPLEISCALEDCONCRETEGRAVITYDAMUNDERINDIRECTDISPLACEMENTCONTROLTWOSCALEDDOWN140OFATYPICALCONCRETEGRAVITYDAMSUBJECTEDTOEQUIVALENTHYDRAULICLATERALLOADSWERETESTEDBYCARPINTERIETAL19THEMODULUSOFELASTICITY,POISSONSRATION,TENSILESTRENGTHANDSPECIFICFRACTUREENERGYWEREREPORTEDTOBE357GPA,01,36MPAAND184N/M,RESPECTIVELYTHETESTEDSYSTEMHASBEENSHOWINFIGURE1FIGURE1SCALEDDOWN140CONCRETEGRAVITYDAMCARPINTERIETAL19THECRACKMOUTHOPENINGDISPLACEMENTCMODWASUSEDASACONTROLPARAMETERADJUSTINGTHEAPPLIEDLOADTHEMODELHAS60520NODEISOPARAMETRICELEMENTSINCLUDING4448NODESFIGURE2SHOWSTHERESPONSERESULTEDFROMTHEPROPOSEDSMEAREDCRACKMODELCOMPARINGWITHTHEEXPERIMENTALRESULTSTHEULTIMATELOADISINGOODAGREEMENTWITHTHEEXPERIMENTALRESULTSSUCH
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