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1、工學(xué)類地盤工學(xué)特論本文由defang168貢獻(xiàn)ppt文檔可能在WAP端瀏覽體驗(yàn)不佳。建議您優(yōu)先選擇TXT，或下載源文件到本機(jī)查看。地盤工學(xué)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(xué)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(qiáng)度–エネルギー補(bǔ)正dyτl=τ?σdx(σ1?σ3)l地盤工學(xué)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(qiáng)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(xué)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(qiáng)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(xué)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(xué)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(xué)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(xué)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(xué)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(xué)特論92004/6/23Increment
8、ofstr
