CUED Publications database

Effects of soil fabric on behaviors of granular soils: Microscopic modeling

Yimsiri, S and Soga, K (2011) Effects of soil fabric on behaviors of granular soils: Microscopic modeling. Computers and Geotechnics, 38. pp. 861-874. ISSN 0266-352X

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Abstract

The effects of initial soil fabric on behaviors of granular soils are investigated by using Distinct Element Method (DEM) numerical simulation. Soil specimens are represented by an assembly of non-uniform sized spheres with different initial contact normal distributions. Isotropically consolidated triaxial compression loading and extension unloading in both undrained and drained conditions are simulated for vertically- and horizontally-sheared specimens. The numerical simulation results are compared qualitatively with the published experimental data and the effects of initial soil fabric on resulting soil behaviors are discussed, including the effects of specimen reconstitution methods, effects of large preshearing, and anisotropic characteristics in undrained and drained conditions. The effects of initial soil fabric and mode of shearing on the quasi-steady state line are also investigated. The numerical simulation results can systematically explain that the observed experimental behaviors of granular soils are due principally to their conditions of the initial soil fabric. This outcome provides insights into the observed phenomena in microscopic view. © 2011 Elsevier Ltd.

Item Type: Article
Uncontrolled Keywords: Anisotropy DEM simulation Drained Quasi-steady state Soil fabric Undrained
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:43
Last Modified: 15 Dec 2014 06:45
DOI: 10.1016/j.compgeo.2011.06.006