Large strain static and dynamic semisaturated soil behaviour

Meroi, Emilio; Schrefler, Bernhard A.; Zienkiewicz, O. C.

doi:10.1002/nag.1610190203

Cited by 89 publications

(65 citation statements)

References 37 publications

(8 reference statements)

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“…The solid pressure p s is given as [26] where the Bishop parameter of each fluid phase (solid surface fraction in contact with the phase) has been taken equal to its own degree of saturation. The last governing equation of the model is the linear momentum balance of the solid phase expressed in rate form [28] as where the interaction between the solid and the three fluid phases is accounted for through the effective stress principle, Eq. (13).…”

Section: Model Parametersmentioning

confidence: 99%

The role of cell lysis and matrix deposition in tumor growth modeling

Santagiuliana

Stigliano

Mascheroni

et al. 2015

Adv. Model. and Simul. in Eng. Sci.

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Section: Model Parametersmentioning

confidence: 99%

The role of cell lysis and matrix deposition in tumor growth modeling

Santagiuliana

Stigliano

Mascheroni

et al. 2015

Adv. Model. and Simul. in Eng. Sci.

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“…tre. The void ratio, which is updated and stored at each integration point, can then be expressed as [25,29] …”

Section: Void Ratio and Conductivity/permeability Updatesmentioning

confidence: 99%

Numerical simulation of elasto-plastic electro-osmosis consolidation at large strain

Yuan

Hicks

2015

Acta Geotech.

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In this paper, a numerical solution for the electro-osmosis consolidation of clay in multi-dimensional domains at large strains is presented, with the coupling of the soil mechanical behaviour, pore water transport and electrical fields being considered. In particular, the Modified Cam Clay model is employed to describe the elastoplastic behaviour of clay, and some empirical expressions are used to consider the nonlinear variation of the hydraulic and electrical conductivities of the soil mass during the consolidation processes. The implementation of the theoretical model in a finite element code allows for analysis of the evolution of the transient response of the clay subjected to electro-osmosis treatment. The proposed model is verified via comparison with data from a large strain electroosmosis laboratory test, to demonstrate its accuracy and effectiveness. Various numerical examples are also investigated to study the deformation characteristics and timedependent evolution of the excess pore pressure. Finally, a well-documented field application of electro-osmosis is simulated to provide further verification. The results show that the numerical solution is effective in predicting the nonlinear behaviour of clay during electro-osmosis consolidation.

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“…Biot's theory for solid-fluid interaction (Biot, 1941;Zienkiewicz et al, 1999) is becoming increasingly popular as the theoretical basis for the dynamic analysis of geotechnical structures (e.g. Arulanandan & Scott, 1993;Meroi et al, 1995;Dewoolkar et al, 2001;Ghosh & Madabhushi, 2003;Burke et al, 2004;Dakoulas & Gazetas, 2005;Liu & Song, 2005;Madabhushi & Zeng, 2007).…”

Section: Introductionmentioning

confidence: 99%

Fully coupled dynamic analysis of an earth dam

Elia¹,

Amorosi²,

Chan³

et al. 2011

Géotechnique

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The paper studies the seismic behaviour of an existing homogeneous earth dam using a fully coupled finiteelement effective stress approach in conjunction with a recently developed multi-surface, elasto-plastic constitutive model for structured soils. The model is calibrated using laboratory test results for the embankment material and the foundation soils. The initial state variables (stress, hardening parameters) are determined by simulating a simplified geological history of the foundation soil, dam construction stages and reservoir impounding, prior to the application of the earthquake shaking at the bedrock level. The paper critically reviews the role of the constitutive model parameters, the hysteretic damping introduced by the model and the additional viscous damping parameters in the accumulation of permanent displacements and in the development and subsequent dissipation of excess pore water pressures due to the seismic loading. The analyses, carried out with reference to a set of earthquake records related to different return periods, show that the overall behaviour of the system in terms of displacements is characterised by a more enhanced deformation pattern of the downstream slope as compared with the upstream one. The large plastic strains accumulation induced throughout the shaking is followed by the development of excess pore water pressures inside the dam and the foundation deposit. Nonetheless, the results are indicative of a satisfactory dynamic performance of the dam, even when subjected to severe seismic loading conditions. KEYWORDS: constitutive relations; dams; dynamics; earthquakes; embankments La présente communication étudie le comportement sismique d'un barrage en terre homogène en utilisant d'une méthode entièrement couplée aux éléments finis avec le concept des contraintes effectives, conjointement avec un modèle constitutif élasto-plastique multi-surfaces pour sols structurés récemment développé. On calibre le modèle en utilisant les résultats d'essais en laboratoire pour le matériau du remblai et les sols de fondation. La détermination des variables d'état (contrainte, paramètres d'écrouissage) s'effectue en simulant l'histoire géologique simplifiée du sol de fondation, les étapes de la construction du barrage, et la retenue du bassin, préala-blement à l'application des secousses sismiques au niveau de la roche mère. La communication procède à un examen critique du rôle des paramètres du modèle constitutif, de l'amortissement hystérétique introduit par le modèle, et des paramètres additionnels d'amortissement visqueux dans l'accumulation de déplacements permanents, et dans la formation et la dissipation ultérieure des pressions interstitielles dues aux charges sismiques. Les analyses, effectuées relativement à un ensemble d'enregistrements de tremblements de terre portant sur différentes périodes de retour, indiquent que le comportement gén-éral du système sur le plan des déplacements est caractérisé par une tendance de déformation renforcée de la pente en aval, par rapport à la pen...

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Large strain static and dynamic semisaturated soil behaviour

Cited by 89 publications

References 37 publications

The role of cell lysis and matrix deposition in tumor growth modeling

The role of cell lysis and matrix deposition in tumor growth modeling

Numerical simulation of elasto-plastic electro-osmosis consolidation at large strain

Fully coupled dynamic analysis of an earth dam

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