, Volume 58, Issue 27, pp 3422-3429,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 31 Aug 2013

The input work expression and the thermodynamics-based modelling framework for unsaturated expansive soils with double porosity

Abstract

In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water and adsorbed water on the soil behaviour, as well as between the deformations of micro- and macrostructure. According to the derived input work expression and the work-energy-dissipation relations for an open multiphase thermodynamic system, we establish a thermodynamics-based modelling framework for unsaturated expansive soils with double porosity.

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