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Spatial Distribution Functions of Strength Parameters for Simulation of Strength Anisotropy in Transversely Isotropic Rock
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  • Journal title : Tunnel and Underground Space
  • Volume 26, Issue 2,  2016, pp.100-109
  • Publisher : Korean Society for Rock Mechanics
  • DOI : 10.7474/TUS.2016.26.2.100
 Title & Authors
Spatial Distribution Functions of Strength Parameters for Simulation of Strength Anisotropy in Transversely Isotropic Rock
Lee, Youn-Kyou;
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 Abstract
This study suggests three spatial distribution functions of strength parameters, which can be adopted in the derivation of failure conditions for transversely isotropic rocks. All three proposed functions, which are the oblate spheroidal function, the exponential function, and the function based on the directional projection of the strength parameter tensor, consist of two model parameters. With assumption that the cohesion and friction angle can be described by the proposed distribution functions, the transversely isotropic Mohr-Coulomb criterion is formulated and used as a failure condition in the simulation of the conventional triaxial tests. The simulation results confirm that the failure criteria incorporating the proposed distribution functions could reproduce the general trend in the variations of the axial stress at failure and the directions of failure planes with varying inclination of the weankness planes and confining pressure. Among three distribution functions, the function based on the directional projection of the strength parameter tensor yields the highest axial strength, while the axial strength estimated by the oblate spheroidal distribution function is the lowest.
 Keywords
Transversely isotropy;Failure criteria;Cohesion;Friction angle;Direction of failure plane;
 Language
Korean
 Cited by
 References
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