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http://dx.doi.org/10.7843/kgs.2011.27.11.055

Constitutive Model for Unsaturated Soils Based on the Effective Stress  

Shin, Ho-Sung (Dept. of Civil and Environmental Engineering, University of Ulsan)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.11, 2011 , pp. 55-69 More about this Journal
Abstract
The importance of unsaturated state in various geo-engineering problems has led to the advance of mechanical constitutive model emulating behavior of unsaturated soils in response to thermo-hydro-mechanical loading. Elasto-plastic mechanical constitutive model for unsaturated soil is formulated based on Bishop's effective stress. Effective stress and temperature are main variables in constitutive equation, and incremental formulation of constitutive relationship is derived to compute stress update and stiffness tensor. Numerical simulations involving coupled THM processes are conducted to discuss numerical stability and applicability of developed constitutive model: one-dimensional test, tri-axial compression test, and clay-buffering at high level radioactive waste disposal. Numerical results demonstrated that developed model can predict very complex behavior of coupled THM phenomena and is applicable to geo-engineering problems under various environmental conditions, as well as interpret typical behavior of unsaturated soils.
Keywords
Constitutive model; Effective stress; THM coupling; Unsaturated soils;
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Times Cited By KSCI : 1  (Citation Analysis)
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