Recent Advanced Constitutive Models for Liquefaction and Cyclic Softening Analysis

Mohammad Zarrabi, Samuel Yniesta

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

Session: Liquefaction and Seismic Slope Stability

ABSTRACT: Five bounding surface constitutive models within the critical state framework are discussed in this study. The selected models are either developed to study the potential of liquefaction or cyclic softening. The studied sand constitutive models are DM04 and PM4SAND while clay constitutive models are SANICLAY-B, SANICLAY-H, and PM4SILT. First, the main features and differences of the models are highlighted, then the performance of each model is compared by a set of undrained cyclic direct shear test simulations. Finally, the merits and limitations of each model are briefly discussed. All selected models have shown to have high abilities in predicting cyclic response of soils in terms of stress path, hysteretic loops, and pore water pressure generation. However, each model has shown limitations that the user should be aware of when using such models.

RÉSUMÉ: La présente étude traite de cinq modèles constitutifs de surfaces limites dans le cadre des états critiques. Les modèles sélectionnés sont déamollissement cyclique. Les modèles constitutifs de sable étudiés sont DM04 et PM4SAND, tandis que les modèles constitutifs d'argile sont SANICLAY-B, SANICLAY-H et PM4SILT. , les principales caractéristiques et différences des modèles sont surlignés, puis les performances de chaque modèle sont comparées par un ensemble de simulations d'essais de cisaillement direct cyclique non drainé. Enfin, on discute brièvement des avantages et des inconvénients de chaque modèle. Tous les modèles sélectionnés ont montré de grandes capacités de prédiction de la réponse cyclique des sols en termes de chemin de contraints, de boucles hystérétiques et de génération de pression interstitielle. Cependant, chaque modèle a montré des limites que l'utilisateur devrait connaître lorsqu'il utilise de tels modèles.

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Cite this article:
Mohammad Zarrabi; Samuel Yniesta (2019) Recent Advanced Constitutive Models for Liquefaction and Cyclic Softening Analysis in GEO2019. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Geo2019Paper301,author = Mohammad Zarrabi; Samuel Yniesta,title = Recent Advanced Constitutive Models for Liquefaction and Cyclic Softening Analysis,year = 2019}