A Time-Dependent Bounding Surface Model for Anisotropic Cohesive Soils.

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  • Time-Dependent Bounding Surface Model f

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Abstract

A time-dependent model for anisotropic cohesive soils is presented, where an existing invisting elasto-plastic bounding surface model is recast into an elastoplastic-viscoplastic format. In addition, in order to accurately simulate the complete creep response of cohesive soils, including creep rupture, a microstructure-based damage law is presented and incorporated into the time-dependent model. The model is numerically implemented and simulations of undrained creep response for both isotropically and anisotropically consolidated soils are provided. The model predictions compared favorably with experimental results, and soil anisotropy has been found to have a significant effect on the undrained creep behavior of anisotropic cohesive soils. The damage law has demonstrated excellent potential for simulating the entire undrained creep response including rupture.

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