Distorted Bounding Surface of Clay with Consideration of the Effect of Temperature on Shearing Response

Sang Inn Woo, Chan-Young Yune

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

Session: Posters

ABSTRACT: The present paper proposes a bounding surface to describe shearing response of clay depending on temperature. As temperature increases, normal consolidation line moves down in the plane of void ratio and mean effective stress. The critical state line, however, does not shifts as much as the normal consolidation line upon temperature change. Therefore, the critical state mean effective stress moves to the pre-consolidation pressure as temperature increases. To naturally capture this, the proposed bounding surface consists of two parts divided at the critical state mean effective stress. The bounding surface was calibrated for the soft Bangkok clay. Elemental simulations from the proposed model showed the model performance to capture the critical state (which is destination of clay upon shearing) without complex hardening and evolution rules compared to the experimental data.

RÉSUMÉ: Le présent article propose une surface limite pour décrire la réponse au cisaillement de l'argile en fonction de la température. À mesure que la température augmente, la ligne de consolidation normale descend dans le plan du taux de vide et de la contrainte effective moyenne. Cependant, la ligne d'état critique ne se déplace pas autant que la ligne de consolidation normale lors d'un changement de température. Par conséquent, la contrainte effective moyenne de l'état critique se déplace vers la pression de pré-consolidation à mesure que la température augmente. Pour capter naturellement cela, la surface de délimitation proposée est constituée de deux parties divisées à l'état critique, la contrainte effective moyenne. La surface de délimitation a été calibrée pour l'argile molle de Bangkok. Les simulations élémentaires du modèle proposé ont montré que le modèle permettait de capturer l'état critique (destination de l'argile lors du cisaillement) sans règles de durcissement et d'évolution complexes par rapport aux données expérimentales.

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Cite this article:
Sang Inn Woo; Chan-Young Yune (2019) Distorted Bounding Surface of Clay with Consideration of the Effect of Temperature on Shearing Response in GEO2019. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Geo2019Paper429,author = Sang Inn Woo; Chan-Young Yune,title = Distorted Bounding Surface of Clay with Consideration of the Effect of Temperature on Shearing Response,year = 2019}