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1、工學類地盤工學特論本文由defang168貢獻ppt文檔可能在WAP端瀏覽體驗不佳。建議您優(yōu)先選擇TXT，或下載源文件到本機查看。地盤工學特論第10回Stress,Strain,ElasticityandPlasticity廣岡明彥ahirooka@civil.kyutech.ac.jphttp://geo.civil.kyutech.ac.jp12004/6/23地盤工學特論前回の講義のまとめ前回の講義のまとめ-1粘土の排水せん斷強度–エネルギー補正dyτl=τ?σdx(σ1?σ3)l地盤工學特論dε1+2dε3??=(σ1?σ3)+σ3???dε1??2200
2、4/6/23前回の講義のまとめ前回の講義のまとめ-2排水せん斷強度σ1f?σ3f=2cdcosφd+(σ1f+σ3f)sinφdφd≒φ′cd≒c′圧密非排水三軸試験で求めたφと圧密排水三軸試験で求めたφdとの比較32004/6/23地盤工學特論前回の講義のまとめ前回の講義のまとめ-3粘土の殘留強度一面せん斷あるいはリングせん斷試験における応力～変位関係の特徴地盤工學特論42004/6/23前回の講義のまとめ前回の講義のまとめ-4Stress,Strain,ElasticityandPlasticitymodel:physicalrepresentationint
3、hesenseofascalemodel?aconceptualideaoranumberofmathematicalequationsForSoilsmathematicalmodels:basedontheoriesofelasticity,plasticity,andfrictionCriticalStateModel地盤工學特論SchofieldandWroth,1968AtkinsonandBransby,197852004/6/23前回の講義のまとめ前回の講義のまとめ-5PlainStrainAxialSymmetrySpecialcase:Solid
4、cylindersofsoilintriaxialtestsσ’2=σ’3δε2=δε3Soil:anaggregateofmineralgrainswithafluidfillingtheporespacesdry;porefluidisairalonesaturated;porefluidiswateralone地盤工學特論62004/6/23前回の講義のまとめ前回の講義のまとめ-6effectivestressσ’=σ–ucontrolssoilbehaviorTheprincipleofeffectivestress(statedbyTerzaghi193
5、6)?Allmeasurableeffectsofachangeofstress,suchascompression,distortion,andachangeofshearingresistance,aredueexclusivelytochangesofeffectivestress.Mathematicalmodelsforsoilbehaviormustbewrittenintermsofeffectivestress,nottotalstress.地盤工學特論72004/6/231.3AnalysisofDeformationandStrainδσ’v,
6、δσ’h:stressincrementδv,δh:smallchangeofdimensionsModeofdeformation.(a)Stressesonaplaneelement.(b)Continuousstraining.(c)Discontinuousslipping.(b)nodiscontinuitiesintheelement.thebehaviorineachandeverypartoftheelementisthesame.(c)alldeformationsareduetoverylargestrainwithintheslipzone.
7、→SlipPlane(inthelimit,thezone:zerothickness)(b)and(c)oftenoccursimultaneously，but(b)or(c)usuallypredominates.82004/6/23地盤工學特論Incrementofplanedisplacement(δh)δεx=??x?(δv)δεz=??z1??(δv)?(δh)?δεxz=??+?2??x?z?(δv)?(δh)?+δγxz=2δεxz=????z???xtheengineer’sshearstrain地盤工學特論92004/6/23Increment
8、ofstr
