飽和土坡滲透—變形—穩(wěn)定性耦合非線性有限元分析

1、天津大學(xué)碩士學(xué)位論文飽和土坡滲透—變形—穩(wěn)定性耦合非線性有限元分析姓名：金小惠申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：王成華2001.12.1ABSTRACTBeingaclassicaltopicinthefieldofsoilmechanics，theanalysisofslopestabilityinengineeringpracticehasbeenmadedominantlywithTotalStressAnalysisme

2、thodsuptonowadaysbutasamatteroffactinmostcases。thestateofstressesoncriticalslipsurfacesiSnotinagreementwiththatofrealones，astheTotalStressAnalysismethodsonlyconsidertheintegralunitstressofsoilmass，takenoaccountofseepagee

3、ffectsanddon’tdifferentiatebetweeneffectivestressandporepressureInfact，soilmassismadeupofsolidphase，flowphaseandgaseousphaseAsforthesaturatedsoilsitcallbeviewedastheinteractionofflowandsolidphaseWhiletheEffectiveStressAn

4、alysismethodsaremoreaccordantwithsoil’Scharacteristicbecausetheydifferentiaterigorouslybetweeneffectivestressandporepressure，takeintoaccountofthesoilframeworkdeformationandtheseepageofwaterIncomparison，EffectiveStressAna

5、lysismethodsaremoreapplicableBlotconsolidationtheoryisamostuniversaltoolforEffectiveStressAnalysisInthispaper，Biotconsolidationtheoryistentativelyemployedinthefiniteelementequations，withDuncan—Changconstitutiverelationsh

6、ipofsoils，thecouplednonlinearfiniteelementflowdeformationstabilityanalysismethodisusedtoanalysethedistributionsofstressesfieldanddisplacementsfieldThesolutiontotheequationismidpointincrementalmethodACoupledFlow&Deformati

7、onBehaviorsNonlinearFiniteElementAnalysisofSlopeStability(CFEASS)programisdevelopedAccordingtotheresultsoffiniteelementmethods，theeffectivestress，porepressure，criticalslipsurface，andtheminimumfactorofsafetyatanytimearefi

8、guredoutFurthermore也ecriticalslipandtheminimumfactorofsafetyatthefinalminutecanbededucedTheminimumfactorofsafetyiSdefinedastheratioofthesummedantislipforcestothesummedslipforcesalongthecriticalslipsurfaceBisectionortwo—d

9、ividedmethodanddynamicprogrammingmethodareadolptedinsearchingforthecriticalslipsurfaceofaslopeInthispaperatfirstCFEASSisusedtoanalysisasoilmass’satl℃SSfield，porepressureanddisplacementfieldWiththereferencesoftheresultsof

10、classicalexample，thereliabilityoftheprogrammingisvalidatedThen，variouskindsofslope’SstressfieldanddisplacementfieldarediscussedCFEASSwhichisbasedonthecoupledflow&deformationbehaviorsfiniteelementanalysisisobviouslyadvant

11、ageousoverTotalStressAnalysismethodsinthatitcallsimulatethebehaviorofstressandstrainofsoils、theprocessesofslopeexcavationsanditcanreflectthedynamicchangeofstressfield，porepressureandfactorofsafetydecidingthelongtermsafet