Modifying the NorSand soil model to improve static simple shear behaviour predictions

Vincent Castonguay, Jean-Marie Konrad

In the proceedings of GeoSt. John's 2019: 72nd Canadian Geotechnical Conference

Session: Numerical Modeling

ABSTRACT: The simple shear laboratory test is nowadays commonly used to investigate soil behaviour under plain strain conditions of deformation. This article focusses on behaviour predictions of such laboratory test using the NorSand soil model. Through the analysis of various test predictions under undrained static simple shear conditions, it is shown that the original isotropic NorSand model is unable to correctly predict contractive behaviour observed in laboratory test results. By implementing the anisotropic critical state theory within the model to develop a new anisotropic NorSand model, the authors were able to satisfactorily predict sand behaviour under simple shear conditions. Prediction results obtained using the anisotropic NorSand model are consistently in better agreement with laboratory data than when using the original isotropic model, especially for anisotropically consolidated simple shear tests.

RÉSUMÉ: est de nos jours couramment utilisé pour étudier le comportement des sols sous conditions de déformations planes. Cet article porte sur la prédiction du comportement loi de comportement NorSand. simple non drainé, il est montré que le modèle original NorSand isotrope est incapable de correctement prédire le comportement contractant observé dans les essais de laboratoire. anisotrope dans NorSand pour créer un nouveau modèle NorSand anisotrope, les auteurs sont parvenus à prédire de Les résultats de prédiction de comportement obtenus grâce au modèle NorSand anisotrope sont systématiquement plus près du comportement observé en laboratoire que ceux obtenus grâce au modèle original NorSand isotrope, spécialement pour les essais de cisaillement simple consolidés anisotropiquement.

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Cite this article:
Vincent Castonguay; Jean-Marie Konrad (2019) Modifying the NorSand soil model to improve static simple shear behaviour predictions in GEO2019. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Geo2019Paper484,author = Vincent Castonguay; Jean-Marie Konrad,title = Modifying the NorSand soil model to improve static simple shear behaviour predictions,year = 2019}