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

Chau, Truong Linh; Bourgeois, Emmanuel; Corfdir, Alain

doi:10.1002/nag.1095

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…With respect to the classical monophasic situation, the variational formulation (36) introduces two additional bilinear symmetric forms, corresponding to the last two terms of the left-hand side. Their numerical treatment does not rise specific difficulties and has been carried out before, for instance in (16), (17), (18) or (19).…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…The introduction of multiphase model allows to combine homogenization and the modelling of the interface [14,15]. This model has been successfully used for the simulation of various types of geotechnical structures under static loadings, such as piled raft foundations [16,17], MSE walls [18,19] and so on. More recently, the possibilities of the approach under dynamic loadings have been investigated by Nguyen et al [20].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

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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“…These advantages of the RE wall drew the attention of researchers on this topic, and at present, a substantial number of studies on this subject have been published. As of now, the behavior of RE walls and its component under static conditions are well known (Hatami and Bathurst, 2005;Abdelouhab et al, 2011;Chau et al, 2012;Koerner and Koerner, 2018). However, only a few studies have investigated the response of RE walls under high-speed train (HST) loading (Payeur et al, 2015;Chawla and Shahu, 2021).…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of reinforced earth walls with sustainable backfills subjected to railway loading

Mandloi

Hegde²

2022

Front. Built Environ.

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The concept of using Reinforced Earth (RE) walls for rail corridors is gaining popularity. As of now, very few nations have successfully adopted the RE walls for Railway infrastructure. These structures require good quality granular materials like sand for backfilling. However, due to the scarcity of good quality natural sand, research efforts are being made to look for cost effective alternatives to sand in backfill applications. The present study examines the possibilities of using the two sustainable materials, namely steel slag and construction and demolition waste (CDW), as backfills in RE walls subjected to harmonic train-induced load. In total, 63 separate full-scale numerical models of RE walls have been analyzed to understand the wall behavior with sustainable backfills subjected to different train speeds. The backfill materials were simulated with three different material models, namely, linear elastic, Mohr-Coulomb and Hardening Soil, for comparison. The results showed that the RE wall behavior is highly frequency-dependent. RE walls with steel slag and CDW backfills have shown 25% and 12% lesser deformations, respectively as compared to the sand backfill. Furthermore, reinforcement tensile forces in walls with sustainable backfills were found to be comparable to those of sand. The maximum deformation of the wall was observed when the fill materials were simulated with the Hardening Soil model. In overall, satisfactory performance of the RE wall was observed in the presence of sustainable backfill materials under Railway loading.

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“…On the other hand, several aspects of MSE behavior are well known from now, since this material was invented by Henri Vidal in 1963: either fundamental aspects like static analysis experimentations [9], pull-off tests [10] or more specific investigations like analyzing the impact of corrosion on steel strips of MSE wall [11]. From a numerical point of view, special attention has been paid to develop good practices in modeling MSE walls, using finite elements models (for example [12], [13]) or finite differences models [14] as well, under several static loading conditions, or to model pull-out tests.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of a Mechanically Stabilized Earth wall under harmonic loading: Experimental characterization and 3D finite elements model

Payeur

Corfdir

Bourgeois³

2015

Computers and Geotechnics

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Dynamic behavior of a Mechanically Stabilized Earth wall under harmonic loading: Experimental characterization and 3D finite elements model. Computers and Geotechnics, Elsevier, 2015, 65, pp.199 -211. 10.1016/j.compgeo.2014 Computers and Geotechnics, 65, 199-211. doi:10.1016/j.compgeo.2014.12.001 2 AbstractThis article presents an analysis of a full-scale experimental Mechanically Stabilized Earth (MSE) wall under harmonic loading. Experimental results are shown and discussed, and compared with 3D finite element simulations. The experimental results indicate that the embankment behavior is linear, and that the displacements of the wall, the tensile forces in the reinforcements, and the stresses in the backfill material are strongly frequency-dependent. The numerical analysis is performed in the time domain with Rayleigh damping and includes special modeling strategies to represent the facing, the ground-reinforcement interface and the overburden pressure. Experimental and numerical values are found to be in good agreement.3

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

Cited by 8 publications

References 17 publications

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

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

Performance evaluation of reinforced earth walls with sustainable backfills subjected to railway loading

Dynamic behavior of a Mechanically Stabilized Earth wall under harmonic loading: Experimental characterization and 3D finite elements model

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