An Anisotropic Hardening Rule for Saturated Clays

Kumbhojkar, A. S.

doi:10.1007/978-94-011-3644-0_53

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…These models do not account for the strength anisotropy of the clay material. Kumbhojkar and Banerjee (1993) employed the plastic strains as a hardening parameter rather than the volumetric strain; however, the results did not match well with the experimental data. Furthermore, the model is complicated due to the large number of parameters required to define the yield surface.…”

Section: Introductionmentioning

confidence: 88%

Application of a multilaminate model to simulate the undrained response of structured clay to shield tunnelling

Dang

Meguid

2008

Can. Geotech. J.

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A constitutive model based on the multilaminate framework has been implemented into a finite element program to investigate the effect of soil structure on the ground response to tunnelling. The model takes into account the elastic unloading–reloading, inherent and induced anisotropy, destructuration, and bonding effects. The model is successfully calibrated and used to investigate the undrained response of structured sensitive clay in the construction of the Gatineau tunnel in Gatineau, Quebec. Numerical results were compared to the field measurements taken during tunnel construction. To improve the performance of the numerical model, an implicit integration algorithm is implemented and proven to be very effective when coupled with the multilaminate framework as compared to the conventional explicit integration methods. The effect of different soil parameters including bonding and anisotropy on the tunnelling induced displacements and lining stresses is also examined using a comprehensive parametric study. The results indicated that soil bonding and anisotropy have significant effects on the shape of the settlement trough as well as the magnitudes of surface displacements and lining stresses induced by tunnelling.

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Section: Introductionmentioning

confidence: 88%

Application of a multilaminate model to simulate the undrained response of structured clay to shield tunnelling

Dang

Meguid

2008

Can. Geotech. J.

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“…Frequently, the constitutive models for anisotropy are developed following elastoplasticity theory, where the deformation is decomposed into elastic and plastic parts (Ghaboussi and Monen 1984, Kumbhojkar and Banerjee 1993, Oda 1993, Duveau et al 1998, Kiyama and Hasegawa 1998, Pietruszczak and Pande 2001, Li and Dafalias 2004. Consequently, the effect of anisotropy on the elastic and plastic behaviour is treated separately.…”

Section: Introductionmentioning

confidence: 99%

Simple shear in sand with an anisotropic hypoplastic model

Osinov

2006

Geomechanics and Geoengineering

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The paper deals with the anisotropic extension of an inherently isotropic hypoplastic constitutive model. Inherent transverse isotropy is incorporated into the model with the help of an operator of anisotropy which is determined by the orientation of the bedding plane and three constitutive parameters. The approach is rather general and is not connected with any specific type of constitutive model. In the present study, two possible extensions of the hypoplastic equation are considered: the application of the anisotropy operator to the nonlinear part of the equation and to the whole equation. The two modifications are exemplified by numerical calculations of simple shear.

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An Anisotropic Hardening Rule for Saturated Clays

Cited by 2 publications

References 2 publications

Application of a multilaminate model to simulate the undrained response of structured clay to shield tunnelling

Application of a multilaminate model to simulate the undrained response of structured clay to shield tunnelling

Simple shear in sand with an anisotropic hypoplastic model

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