土的半隱式圖形返回算法研究及土坡穩(wěn)定分析.pdf

1、大連理工大學(xué)碩士學(xué)位論文土的半隱式圖形返回算法研究及土坡穩(wěn)定分析姓名：米厚天申請學(xué)位級別：碩士專業(yè)：水工結(jié)構(gòu)工程指導(dǎo)教師：遲世春20050601土的半隱式圖形返同算法研究及十坡穩(wěn)定分析TheresearchfortheSemiimplicitreturnmappingalgorithmoftheearthstructureandtheslopestabilityanalysisAbstractInthispaper，thesemiimp

2、licitreturnmappingalgorithmhasbeendevelopedtocopetheintegrationoftheLade—DuncanelastoplasticconstitutivemodelInwhich，theincrementalconstitutiveequationsfortheFEMprogramwerededucedandtheconstitutiveintegrationmoduleiscalc

3、ulatedbytheusersubroutine—UMAT，whichisanextremelypowerfulandflexibletoolforanalysis，andisavailableinthenonlinearFEMsoftwareABAQUSTheprogramof3DFEMwithLade—Duncanmodelwascompleted，andthetriaxialtestcurveswerecalculatedund

4、erthedifferentconfinedpressurebythisprogramTheresultshowsthatthesemiimplicitretnmmappingalgorithmwithLade—DuncanmodelisrobustThetwo—dimensionalnonlinearquasistaticFEMhasbeenusedtoanalysistheslopestabilityoftherockfilldam

5、，Inthatpart，thestrengthreductiontechniquehasbeenquotedtothebignonlinearFEMsoftwareABAQUSThecontinuousvarietyofthestrengthparametersofslopehasbeenimplementinFEMTakingNUOZHADUcorerockfilldamasexample，thenonlinearquasi—stat

6、icFEMcalculationmadtheslopestabilityanalysishavebeencompleted，Drawingthecurvebetweenthehorizontaldisplacementoftheslopetopanddeductfactor，the“failure’’criterionofslopecanbeendefined，ie(Au／AR)≥j。，andthecontrolvalueofthefa