Experimental and numerical study of the behavior of a reinforced-earth wall subjected to a local load

Bourgeois, Emmanuel; Soyez, Laurent; Kouby, Alain Le

doi:10.1016/j.compgeo.2011.02.017

Cited by 36 publications

(21 citation statements)

References 11 publications

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“…This analytical derivation was used as a basis for the choice of the value of c I and led to the adoption, in all the simulations presented here, of a unique value c I = 40 MPa/m. This value is similar to that used by Bourgeois et al [7] to discuss the behavior of an experimental wall (with a height of 3.5 m, which is significantly smaller than that of the wall discussed in the present work). Parametric studies (not detailed here) were carried out to investigate the influence of c I : results showed that, for large enough values of c I , the predicted behavior of the wall tends to be independent of this parameter.…”

Section: Use Of a Multiphase Approach To Account For The Ground-stripsupporting

confidence: 89%

Finite element analysis of the effect of corrosion on the behavior of reinforced earth walls

Chau

Bourgeois

Corfdir

2011

Num Anal Meth Geomechanics

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A simple model for the corrosion-induced loss of stiffness and strength of the steel strips of earth-reinforced walls was introduced in a finite element simulation of the long-term behavior of the wall, in which the backfill-strips interactions are taken into account by means of a generalized homogenization procedure (called a multiphase model). The results show an initial phase of slow displacements induced by the loss of stiffness, followed after a few decades by a steep acceleration of the displacements, leading to wall failure. The influences of the parameter controlling corrosion, the backfill cohesion and the heterogeneity of the corrosion process are discussed. Results are used to discuss a strategy for reinforced earth wall surveillance. Copyright

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Section: Use Of a Multiphase Approach To Account For The Ground-stripsupporting

confidence: 89%

Finite element analysis of the effect of corrosion on the behavior of reinforced earth walls

Chau

Bourgeois

Corfdir

2011

Num Anal Meth Geomechanics

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“…However, when the wall movement is restricted or is less than the magnitude necessary to reach the limit condition, the mobilised earth pressures become greater than that of the limit state (Matsuzawa & Hazarika, 1996). Numerous experimental investigations (Bourgeois, Soyez, & Le Kouby, 2011;Chen & Chiu, 2008;Tejchman, 2011) have reported that the earth pressure is not only associated with the mode of wall movement but also with the magnitude developed. However, the earth pressure calculation still needs further development to take account of wall movement.…”

Section: Introductionmentioning

confidence: 95%

Active earth pressure of retaining wall considering wall movement

Lin

2014

European Journal of Environmental and Civil Engineering

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The coulomb's limit equilibrium theory is employed for the active earth pressure calculation of retaining wall considering translational wall movement. It is considered that the earth pressure against the back of the wall is due to the thrust exerted by a wedge of soil between the wall and a plane passing through the heel of the wall. The soil-wall friction angle and internal soil friction angle are obtained via the simulation of the unloading triaxial test. The basic equations are established by considering the force equilibrium of a partial soil wedge. The lateral earth pressure coefficient is achieved through the moment equilibrium of the whole soil wedge. Comparisons illustrating the accuracy of the proposed approach are made with solutions available in the literature.

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“…For the backfill material, we have tested two values of the Young's modulus. The first one corresponds to 'typical' values of the modulus of a railway backfill, obtained on a full-scale experimental MSE wall [38,49]. The second value corresponds to a less stiff material, in which the shear wave velocity is lower, which is why it is referred to as a 'slow backfill material' in the following.…”

Section: Materials Parametersmentioning

confidence: 99%

Numerical simulation of the response of a reinforced wall to a high speed train passage

Corfdir

Bourgeois²,

Payeur

2017

Int. J. Numer. Anal. Meth. Geomech.

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The dynamic response of a mechanically stabilized earth wall to the passing of a high-speed train is modelled using the finite element method. A three-dimensional analysis is carried out, using a specific framework that allows performing the analysis with a moderate computational effort. In the first place, a so-called multiphase approach is used to take into account the reinforcing strips. The moving load is taken into account by performing the calculation in a mobile referential using the properties of symmetry of the train cars and a simplifying assumption of periodicity for the whole train. We also assume a steady state. A partial validation of the approach is obtained by means of a comparison with an analytical solution. The quick increase in displacements induced by the train passing when the speed comes close to the celerity of Rayleigh waves clearly appears in the results. The vertical displacements, vertical stresses in the backfill,tensile forces in the strips and the influence of the stiffness of the soil are discussed.La réponse dynamique d'un mur en sol renforcé au passage d'un train à grande vitesse est modélisée par éléments finis. Une analyse tridimensionnelle est effectuée, dans un cadre spécifique qui permet de faire le calcul pour un cout de calcul acceptable : d'une part, on utilise le modèle multiphasique pour prendre en compte les armatures ; d'autre part, on prend en compte le déplacement de la charge en effectuant le calcul dans un référentiel mobile ; enfin on tire parti des propriétés de symétrie des voitures et on fait une hypothèse simplificatrice de périodicité du train. On fait de plus l'hypothèse que l'on a atteint un régime permanent. Une validation partielle est obtenue par comparaison avec une solution analytique. L'augmentation des déplacements induits par le passage du train lorsque sa vitesse s'approche de la célérité des ondes de Rayleigh apparait clairement dans les résultats. Les déplacements verticaux, les contraintes verticales dans le remblai, les efforts de traction dans les armatures et l'influence de la raideur du remblai sont discutées

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Experimental and numerical study of the behavior of a reinforced-earth wall subjected to a local load

Cited by 36 publications

References 11 publications

Finite element analysis of the effect of corrosion on the behavior of reinforced earth walls

Finite element analysis of the effect of corrosion on the behavior of reinforced earth walls

Active earth pressure of retaining wall considering wall movement

Numerical simulation of the response of a reinforced wall to a high speed train passage

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