SMALL STRAIN STIFFNESS AND NON-LINEAR STRESS-STRAIN BEHAVIOUR OF CEMENT-MIXED GRAVELLY SOIL
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概要
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The stiffness at small strains and non-linear stress-strain relation of compacted cement-mixed well-graded gravelly soil as well as the ageing effects were evaluated by drained triaxial compression tests on compacted moist specimens cured for different periods at isotropic and different anisotropic stress states. In all the tests, the initial stress-strain relation at small strains less than about 0.001% was essentially elastic and the initial Young's modulus, E_0, was essentially the same as the E_<eq> value evaluated by applying unload/reload cycles under otherwise the same conditions. The E_<eq> values were rather independent of strain rate. The E_<eq> value from the first unload/reload cycle applied during otherwise continuous ML became noticeably lower than the elastic modulus evaluated at the same stress state, more as approaching the peak stress state. After a number of small unload/reload cycles and long sustained loading, the E_<eq> value became closer to the elastic modulus due to a decrease in the viscous effects. The ratio of E_0 to the compressive strength (q_<max>) was similar to that of concrete but noticeably larger than those of uncompacted cement-mixed soil, sedimentary softrock and unbound gravelly soil. Both E_0 and q_<max> increased with time by ageing, while the E_0/q_<max> ratio decreased with time. When ML was restarted at a constant strain rate after ageing with a shear stress, the tangent stiffness became very high for a large stress range with a substantial change in the non-linearity of stress-strain relation.
著者
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Tatsuoka Fumio
Department Of Civil Engineering Tokyo University Of Science
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Kongsukprasert Lalana
Department Of Civil Engineering Tokyo University Of Science
関連論文
- EFFECTS OF PARTICLE CHARACTERISTICS ON THE VISCOUS PROPERTIES OF GRANULAR MATERIALS IN SHEAR
- VISCOUS PROPERTY OF LOOSE SAND IN TRIAXIAL COMPRESSION, EXTENSION AND CYCLIC LOADING
- VISCOUS BEHAVIOUR OF UNBOUND GRANULAR MATERIALS IN DIRECT SHEAR
- MODELLING AND SIMULATION OF RATE-DEPENDENT STRESS-STRAIN BEHAVIOUR OF GRANULAR MATERIALS IN SHEAR
- MODELLING OF AGEING EFFECTS ON THE ELASTO-VISCOPLASTIC BEHAVIOUR OF GEOMATERIAL
- VARIOUS VISCOSITY TYPES OF GEOMATERIALS IN SHEAR AND THEIR MATHEMATICAL EXPRESSION
- SMALL STRAIN STIFFNESS AND NON-LINEAR STRESS-STRAIN BEHAVIOUR OF CEMENT-MIXED GRAVELLY SOIL
- SMALL-STRAIN STRESS-STRAIN PROPERTIES OF EXPANDED POLYSTYRENE GEOFOAM
- STRAIN ENERGY-BASED ELASTO-VISCOPLASTIC CONSTITUTIVE MODELLING OF SAND FOR NUMERICAL SIMULATION
- VISCOUS PROPERTY OF TOYOURA SAND OVER A WIDE RANGE OF SHEAR DEFORMATION RATE AND ITS MODEL SIMULATION
- RESIDUAL DEFORMATION OF GEOSYNTHETIC-REINFORCED SAND IN PLANE STRAIN COMPRESSION AFFECTED BY VISCOUS PROPERTIES OF GEOSYNTHETIC REINFORCEMENT
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- RATE-DEPENDENT LOAD-STRAIN BEHAVIOUR OF GEOGRID ARRANGED IN SAND UNDER PLANE STRAIN COMPRESSION
- EFFECTS OF REINFORCEMENT TYPE AND LOADING HISTORY ON THE DEFORMATION OF REINFORCED SAND IN PLANE STRAIN COMPRESSION
- VISCOUS PROPERTIES OF GRANULAR MATERIALS HAVING DIFFERENT PARTICLE SHAPES IN DIRECT SHEAR
- STRENGTH AND DEFORMATION CHARACTERISTICS OF RECYCLED CONCRETE AGGREGATE AS A BACKFILL MATERIAL
- TIME-DEPENDENT SHEAR DEFORMATION CHARACTERISTICS OF GEOMATERIALS AND THEIR SIMULATION
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- RATE EFFECTS ON THE STRESS-STRAIN BEHAVIOUR OF EPS GEOFOAM
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