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Anisotropic Stress-Strain Behavior at Small Strains of Clay by Triaxial and Bender Element Tests
In this study, to examine the effect of the fabric anisotropy on elastic moduli (shear and Young's moduli), the bender element, cyclic and monotonic triaxial tests were performed on reconstituted clay specimens with different fabric characteristics. The specimens with the angle between the axial direction of the triaxial specimen and the bedding direction of 0 and 90 degrees were cut from the pre-consolidated clay block. These specimens were isotropically consolidated under several kinds of confining pressures. The shear wave velocities in three different directions (VH, HH, HV-wave) were measured by bender element tests, and the stiffness under wide ranges of strain levels up to failure were measured by cyclic and monotonic triaxial tests. Test results showed that: 1) the shear modulus obtained from the shear wave for propagating and vibrating horizontal to the bedding plane is higher than the others two kinds of moduli, (2) the horizontal Young's modulus at small strain is also higher than the vertical one, and 3) the anisotropy of the elastic modulus of clay is larger than that with sand, but becomes lower with the increase in strain level and consolidation stress.
Anisotropic Stress-Strain Behavior at Small Strains of Clay by Triaxial and Bender Element Tests
In this study, to examine the effect of the fabric anisotropy on elastic moduli (shear and Young's moduli), the bender element, cyclic and monotonic triaxial tests were performed on reconstituted clay specimens with different fabric characteristics. The specimens with the angle between the axial direction of the triaxial specimen and the bedding direction of 0 and 90 degrees were cut from the pre-consolidated clay block. These specimens were isotropically consolidated under several kinds of confining pressures. The shear wave velocities in three different directions (VH, HH, HV-wave) were measured by bender element tests, and the stiffness under wide ranges of strain levels up to failure were measured by cyclic and monotonic triaxial tests. Test results showed that: 1) the shear modulus obtained from the shear wave for propagating and vibrating horizontal to the bedding plane is higher than the others two kinds of moduli, (2) the horizontal Young's modulus at small strain is also higher than the vertical one, and 3) the anisotropy of the elastic modulus of clay is larger than that with sand, but becomes lower with the increase in strain level and consolidation stress.
Anisotropic Stress-Strain Behavior at Small Strains of Clay by Triaxial and Bender Element Tests
Yamashita, Satoshi (author) / Hori, Tomohito (author) / Suzuki, Teruyuki (author)
Second Japan-U.S. Workshop on Testing, Modeling, and Simulation in Geomechanics ; 2005 ; Kyoto, Japan
Geomechanics II ; 44-57
2006-08-28
Conference paper
Electronic Resource
English
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