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Sanavia, Lorenzo (2008) Numerical modelling of a slope stability test by means of porous media mechanics. [Preprint]

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Abstract (english)

This work presents a finite element analysis of the initiation of a slope failure in a small-scale laboratory test due to pore pressure variation. To this aim, a fully coupled multiphase model for saturated/partially saturated solid porous materials based on porous media mechanics is used. The slope is described as a three-phase deforming porous continuum where heat, water and gas flow are taken into account. The gas phase is modelled as an ideal gas composed of dry air and water vapour. Phase changes of water, heat transfer through conduction and convection and latent heat transfer are considered. The independent variables are: solid displacements, capillary pressure, gas pressure and temperature. The effective stress state is limited by Drucker-Prager yield surface for the sake of simplicity. Small strains and quasi-static loading conditions are assumed. It is shown that the multiphase modelling is able to capture the main experimental observations such as the local failure zone at the onset of slope failure and the outflow appeared in that zone. It also allows to understand the triggering mechanisms of the failure zone.


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EPrint type:Preprint
Anno di Pubblicazione:19 April 2008
More information:Articolo EC1258 accettato dalla rivista Engineering Computations: International Journal for Computer-Aided Engineering and Software di Emerald Group Publishing Limited. ISSN: 0264-4401
Key Words:Poromechanics, Multiphase porous material, Thermo-Hydro-Mechanical modelling, Initiation of landslides, Finite element modelling, Coupled problems.
Settori scientifico-disciplinari MIUR:Area 08 - Ingegneria civile e Architettura > ICAR/08 Scienza delle costruzioni
Struttura di riferimento:Dipartimenti > pre 2012 - Dipartimento di Costruzioni e Trasporti
Codice ID:1131
Depositato il:08 Aug 2008
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