Multi-Physics Modelling Of The Consolidation Processes In Variably Saturated Elasto-Plastic Soils Due To High-Temperature

The aim of this paper is numerical analysis of the consolidation processes in soils due to high temperature. A fully coupled finite element model for non-isothermal elasto-plastic multiphase materials at high temperature is therefore developed in the framework of Porous media mechanics for fully coupled multi-phase porous media. The non-isothermal elasto-plastic consolidation processes of a Boom clay column due to a temperature rise of the top surface from 30 to 150 degrees C is studied in detail, in order to analyze the coupled thermo-hydro-mechanical behaviour of the material when the temperature is above the boiling value and water phase change develops inducing variably saturated conditions. The numerical results reveal a temperature increase over time in the column; desaturation starts from the top surface, triggered by a water vapor mass exchange with the ambient at a RH=95%. When the temperature reaches the boiling value, phase change for the liquid water occurs and desaturation proceed much faster, developing high capillary pressures and inducing plastic strains, swelling and a final settlement when reaching the steady state conditions.

Onate, E
Oliver, X
Huerta, A
Published in:
11Th World Congress On Computational Mechanics; 5Th European Conference On Computational Mechanics; 6Th European Conference On Computational Fluid Dynamics, Vols Ii - Iv, 3230-3239
Presented at:
11th World Congress on Computational Mechanics (WCCM) / 5th European Conference on Computational Mechanics (ECCM) / 6th European Conference on Computational Fluid Dynamics (ECFD), Barcelona, SPAIN, JUL 20-25, 2014
08034 Barcelona, Int Center Numerical Methods Engineering

 Record created 2015-05-29, last modified 2018-01-28

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