American Society of Civil Engineers


Cap Plasticity Model for Thawing Soil


by Sally Shoop, P.E., A.M.ASCE, (Research Civil Engineer, U.S. Army Corps of Engineer, Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755) and Rosa Affleck, A.M.ASCE, (Research Civil Engineer, U.S. Army Corps of Engineer, Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755)

pp. 1-11, (doi:  http://dx.doi.org/10.1061/40786(165)8)

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Document type: Conference Proceeding Paper
Part of: Calibration of Constitutive Models
Abstract: A material model for soft, wet soil was generated to simulate the deformation behavior of thawing soil under vehicle loading on paved and unpaved roads. The soil modeled, a frost-susceptible fine sand called Lebanon Sand, was subjected to a full suite of saturated and unsaturated triaxial testing duplicating conditions experienced during large-scale freeze—thaw testing. Material parameters were generated for a capped Drucker—Prager plasticity model with hardening. These were calibrated in triaxial test simulations using the commercial finite element code ABAQUS. The material model was then implemented in several three-dimensional finite element simulations for validation and robustness.


ASCE Subject Headings:
Freeze and thaw
Plasticity
Soil deformation