工學(xué)類地盤工學(xué)特論85955

《工學(xué)類地盤工學(xué)特論85955》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。

1、工學(xué)類地盤工學(xué)特論85955工學(xué)類地盤工學(xué)特論.txt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(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度–エネルギー補正dyτl=τ?σdx(σ1?σ3)l地盤工學(xué)特論dε1+2dε3??=(σ1?σ3)+σ3?

2、??dε1??22004/6/23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(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:physicalrepresentatio

3、ninthesenseofascalemodel?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:Solidcyl

4、indersofsoilintriaxialtestsσ’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(statedbyTerzaghi1936)?Allmeas

5、urableeffectsofachangeofstress,suchascompression,distortion,andachangeofshearingresistance,aredueexclusivelytochangesofeffectivestress.Mathematicalmodelsforsoilbehaviormustbewrittenintermsofeffectivestress,nottotalstress.地盤工學(xué)特論72004/6/231.3AnalysisofDeformationandStrainδσ’v,δσ’h:stressincrem

6、entδv,δh:smallchangeofdimensionsModeofdeformation.(a)Stressesonaplaneelement.(b)Continuousstraining.(c)Discontinuousslipping.(b)nodiscontinuitiesintheelement.thebehaviorineachandeverypartoftheelementisthesame.(c)alldeformationsareduetoverylargestrainwithintheslipzone.→SlipPlane(inthelimit,th

7、ezone: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/