Physical and analytical modelling of geosynthetic strip pull-out behaviour

Abdelouhab, Abdelkader; Dias, Daniel; Freitag, Nicolas

doi:10.1016/j.geotexmem.2009.09.018

Cited by 60 publications

(26 citation statements)

References 23 publications

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“…While reinforcement bars elastic properties are well known (from [10], [21], see Table 4), connection pieces are actually softer than reinforcement [34], which must be taken into account in the numerical model. …”

Section: Reinforcement Modelmentioning

confidence: 99%

“…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%

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

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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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Section: Reinforcement Modelmentioning

confidence: 99%

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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“…Performance data on MSE walls are required in many cases and can be obtained by field instrumentation, centrifuge tests, and full-scale physical modeling. Nevertheless, field monitoring and experimental tests are costly and time-consuming [4]. As an alternative, computer-based numerical modeling can be used for the design, parametric studies, and forensic investigation of MSE walls [5].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of MSE Wall with different Soil Properties and Reinforcement Length

Hulagabali¹

2018

IJRASET

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The Mechanically Stabilised Earth (MSE) retaining wall is used as an alternative designed structure for conventional cast-in-place concrete type walls and gravity walls. The MSE wall behaves as a coherent block considered as flexible, which can sustain loading types and deformations due to the interaction between the backfill and the inclusion materials. The construction of MSE walls is cost effective, requires less site preparation, and is technically more feasible. MSE wall behaviour highly depends upon type of reinforcement and backfill used in the system. However, use of backfill with high fine content and poor drainage behavior can cause excessive wall movement or even failure. In the present study, MSE wall was modelled using finite element numerical tool PLAXIS 2D, to study the effect of backfill and reinforcement on MSE wall behaviour. Wall deformations were analysed by varying soil parameters such as, soil friction angle and unit weight soil of retained and foundation soil. It was observed that, as the friction angle of the foundation soil increased, wall deformations were reduced. Also, it was seen that, length of the reinforcements has significant effect on wall deformations. Deformations were reduced as the length of reinforcements increased.

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“…Les études expérimentales présentent l'inconvénient du coût, du temps de conception et de réalisation. Elles sont généralement axées sur la définition de nouveaux paramètres de modélisation ou de dimensionnement dus à l'utilisation de nouveaux éléments de renforcements, de nouveaux panneaux de revêtement et autres (Won et Kim, 2007;Yoo et Kim, 2008;Leshchinsky, 2009;Abdelouhab et al, 2009). Les études analytiques se limitent à définir de nouveaux modèles d'ancrage pour de nouveaux types de renforcement (Bourdeau, 1990;Ling et al, 1992;Sobhi et Wu, 1996;Dias et al, 1998;Gurung et al, 1999;Koerner, 2001;Abdelouhab et al, 2009).…”

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“…Elles sont généralement axées sur la définition de nouveaux paramètres de modélisation ou de dimensionnement dus à l'utilisation de nouveaux éléments de renforcements, de nouveaux panneaux de revêtement et autres (Won et Kim, 2007;Yoo et Kim, 2008;Leshchinsky, 2009;Abdelouhab et al, 2009). Les études analytiques se limitent à définir de nouveaux modèles d'ancrage pour de nouveaux types de renforcement (Bourdeau, 1990;Ling et al, 1992;Sobhi et Wu, 1996;Dias et al, 1998;Gurung et al, 1999;Koerner, 2001;Abdelouhab et al, 2009). Par contre, la modélisation numérique permet d'analyser la stabilité, la déformation et l'influence de plusieurs paramètres en tout point du modèle dans un temps raisonnable (Ho et Rowe, 1994;Ling et Leshchinsky, 2003;Hatami et Bathurst, 2005Skinner et Rowe, 2005;Al Hattamleh et Muhunthan, 2006;Bergado et Teerawattanasuk, 2008;Dias et Abdelouhab, 2010).…”

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Modélisation numérique bidimensionnelle de murs en Terre Armée

Abdelouhab

Dias

Freitag³

2012

European Journal of Environmental and Civil Engineering

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Coulomb 3 -20 av. A. Einstein -69621 Villeurbanne cedex; b LTHE Université Joseph-Fourier, UMR 5564 BP 53, 38041 Grenoble cedex; c Terre Armée internationale 1 bis, rue du PetitClamart, 78140 Vélizy-Villacoublay, FranceAfin de s'affranchir de nouvelles étapes dans l'optimisation des méthodes de conception des murs en Terre Armée, une modélisation numérique précise est mise en oeuvre. Cette approche utilise des paramètres déterminés à partir d'études expérimentales. Un mur en Terre Armée est modélisé et étudié de deux points de vue: l'état limite de service "ELS" et l'état limite ultime "ELU". La construction du mur est simulée en plusieurs étapes et les paramètres d'interface sol/armature sont déduits des essais d'extraction. Une étude paramétrique est mise en place et permet de mettre en évidence l'influence de plusieurs paramètres. Les résultats de cette modélisation montre que l'utilisation de bandes géosynthé-tiques deux fois plus larges que les armatures métalliques conduit à plus de déforma-tion du mur, mais également à un facteur de sécurité plus élevé. Une étude paramétrique portant sur les paramètres géomécaniques a permis de mettre en évi-dence les paramètres les plus importants pour la modélisation de ce type de murs qui sont: l'angle de frottement et la cohésion du sol, la raideur de cisaillement à l'interface et le module élastique de l'armature. Il est également montré que pour la construction du mur qui implique des conditions de chargement statique, le modèle CJS2 qui tient compte de la non-linéarité du sol et de la dilatance avant la rupture induit des forces de tractions légèrement supérieures par rapport aux modèles de type Mohr Coulomb et Duncan-Chang.In order to make new steps in the optimisation of the design method of the Mechanically Stabilized Earth (MSE) wall, accurate numerical modeling was carried out using experimental parameters. A reference MSE wall is modeled from two points of view: serviceability limit state "SLS" and ultimate limit state "ULS". The construction of the wall is simulated in several stages and the soil/interface parameters are back analysed from pullout tests. An extensive parametric study is set up and permits to highlight the influence of several parameters. The modeling results show that the use of geosynthetic straps twice as wide than metallic strips induces more deformation of the wall but a higher safety factor. To design theses walls the important parameters are: the soil friction, the cohesion, the interface shear stiffness and the strip elastic modulus. It is also shown that for wall construction that involves static loading conditions, the CJS2 model which takes into account of the soil non-linearity and dilatancy before failure induces slightly higher strip tensile forces than Mohr Coulomb and modified Duncan-Chang models.

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Physical and analytical modelling of geosynthetic strip pull-out behaviour

Cited by 60 publications

References 23 publications

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

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

Behaviour of MSE Wall with different Soil Properties and Reinforcement Length

Modélisation numérique bidimensionnelle de murs en Terre Armée

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