APPLICATION OF MICROMECHANICS MODEL TO STUDY ANISOTROPY OF SOILS AT SMALL STRAINS

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概要

• 論文の詳細を見る

• A micromechanics model is used to analyse the stiffness anisotropy of soils at small strains. Five material constants for a cross-anisotropic elastic material are related to micromechanics variables such as fabric anisotropy, contact stiffness, particle radius, and the number of contacts in a given volume of particulate assembly. The analytical results from the model are compared with the published experimental data on small-strain stiffness anisotropy in order to estimate typical soil fabric conditions of sands and clays. The relationship between the small-strain shear modulus obtained from triaxial tests and shear tests is examined using the micromechanics model. The analysis shows that, when a soil is stiffer in the horizontal direction, the shear modulus evaluated from the conventional triaxial drained tests underestimates G_<vh> and G_<vh>. The opposite is true when a soil is stiffer in the vertical direction. When a soil is sheared in undrained condition, the measured shear modulus is closer to G_<vh> than G_<vh>, especially when the soil is stiffer in the horizontal direction. The effect of soil anisotropy on the stiffness measured from different stress paths in triaxial condition is investigated.

• 社団法人地盤工学会の論文
• 2002-10-15

著者

• 曽我 健一

  Lecturer in Engineering, University of Cambridge, UK.

• SOGA K.

  Senior Lecturer, Engineering Department, Cambridge University

• Soga Kenichi

  University Of Cambridge

• Soga K.

  Senior Lecturer Engineering Department Cambridge University

• 曽我 健一

  Senior Lecturer, Engineering Department, Cambridge University

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