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Small strain stiffness within logarithmic contractancy model for structured anisotropic clay

Abstract: Stiffness of soils in the small strain region is high and it decays nonlinearly with increasing shear strains or with mobilization of shear stresses. However, the commonly used critical state based constitutive models use a simple elastic formulation at small strains that falls short in the prediction of the small strain nonlinearity and anisotropy. This paper proposes a simple way for rendering the existing constitutive models with the capability to capture the small strain behaviour of soils. This is illustrated by proposing a new model for structured anisotropic clay extending an existing model that uses the framework of logarithmic contractancy called ESCLAY1S. The proposed model is implemented into a Finite Element program as a user-defined soil model. The model predictions are compared with experimental data for various clays. Furthermore, the effect of nonlinearity is investigated for an excavation in soft clay.

Otras comunicaciones del congreso o articulos relacionados con autores/as de la Universidad de Cantabria

 Congreso: Nordic Geotechnical Meeting (18th : 2021 : Helsinki, Finland)

Editorial: IOP Publishing Ltd.

 Fecha de publicación: 01/01/2021

Nº de páginas: 10

Tipo de publicación: Comunicación a Congreso

 DOI: 10.1088/1755-1315/710/1/012042

ISSN: 1757-8981,1757-899X

Autores/as

SIVASITHAMPARAM, N.

D´IGNAZIO, M.

TSEGAYE, A B

MADSHUS, C.