河海大学殷宗泽高等土力学1(英文)Constitutive Law of Soil

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1、AdvancedsoilmechanicsConstitutivelawofsoilMaterialcomponentsofsoil&classificationStrengthofsoilConsolidationandrheologySlopestabilityConstitutiveLawofSoilYinZong-ze殷宗泽Whatisconstitutivelaw?Stress-strainrelationshipStress-strain-strengthrelationshipStress-strain-timerelat

2、ionshipStress-strain-temperaturerelationshipstrainstressstrength(1)CompressiontestSimplestressconditionSettlementofbuilding——onedimensionalproblemConfinedcompressiontest,(oedometertest)pshepaCoefficientofcompressionVoidratio1.Stress-strainTestslinearnonlineareepCompressi

3、onindex(2)ConventionaltriaxialtestFirst—cellpressuresurroundingpressureconfiningpressureStraincomponentspistonshaftorganicglassbasecylindricalcellrubbermembranecapthroughwaterapplyThen—deviatorstressthroughpistonapplycylindricalsampleComplicatedstressstateEarthdam,underg

4、roundstructure,harbor,excavation,etc.ExtensiveHooke’slaw（linearassumption）expandcompressBoussinesqsolutionadditionalstressSampleisenclosedinarubbermembrane,andisputinthecylindricalcell.Cellpressure——Axialstress——Dike,dam,retainingwall,nodeformationinlongitudinaldirection

5、samplemetal(3)PlanestraintestApplyMeasure(4)TruetriaxialtestM----fromMd1d2Isolativebodyringcolumnshapeprojecttoxaxis(5)Torsionalsheartest（hollowed）2.DeformationCharacteristicsofSoils(1)Non-linearandnon-elasticmetalsoilPlasticstrain—irrecoverablestrain,duetoadjustmentofpo

6、sitionofgrains.Oneparticlemayslipoveranotherparticle,maydropintoporespace,andtherelativepositionbetweenthetwoparticlescannotberecovered.DeformationcannotberecoveredStress–straincurveoftheaftercycleisdifferentfromthebeforeone.Energylost—changeintodeformationenergyAfterman

7、ycycles——elastic(2)Plasticvolumetricstrainmetal—noplasticvolumetricstrain,—verydensemediasoil—obviousplasticvolumetricstrain—porousmediainducedbyploadingpunloadingMacroscopic—compressMicroscopic—slipbetweengrainsinducedbyShearstressPerformtriaxialtestwithp=constantincrea

8、se,butdecreasep=constantp=constantShearcompressionSheardilationp—averagenormalstress,orglobalstressShea