Prediction of the small strain behaviour of natural Pisa clay by means of the MIT-S1 constitutive model

Fortuna, S. and Whittle, A. J. (2009). Prediction of the small strain behaviour of natural Pisa clay by means of the MIT-S1 constitutive model. In: Hoe I. Ling, Andrew Smythe and Raimondo Betti, Poromechanics IV - Proceedings of the Fourth Biot Conference on Poromechanics. 4th Biot Conference on Poromechanics, New York, U.S.A., (1059-1064). June 8 - 10, 2009.


Author Fortuna, S.
Whittle, A. J.
Title of paper Prediction of the small strain behaviour of natural Pisa clay by means of the MIT-S1 constitutive model
Conference name 4th Biot Conference on Poromechanics
Conference location New York, U.S.A.
Conference dates June 8 - 10, 2009
Proceedings title Poromechanics IV - Proceedings of the Fourth Biot Conference on Poromechanics
Place of Publication Pennsylvania, U.S.A.
Publisher DEStech Publications
Publication Year 2009
Year available 2009
Sub-type Fully published paper
ISBN 978-1-60595-006-8
Editor Hoe I. Ling
Andrew Smythe
Raimondo Betti
Start page 1059
End page 1064
Total pages 6
Collection year 2010
Language eng
Abstract/Summary It is known that the deviatoric strains epsilon(s) experienced by most of the soil elements in the volume interacting with an excavation are likely to be smaller than about 0.1% [1]. Moreover, depending on their position in the ground during loading, different elements of soil can experience completely different stress paths, in both compression and extension [2]. Still, it can be approximately assumed that the majority of them will experience 'unloading' (Delta p' < 0). It has also been observed that soft clays show a highly non linear behaviour, at all levels of strains [2]. Therefore, it is important to assess the capability of a constitutive model in predicting the small strain behaviour of soft clays along the various stress paths directions expected in the field. This paper illustrates the capability of the advanced rate-independent constitutive model MIT-S1 in reproducing the small strain behaviour of the undisturbed high plasticity Pisa Clay along various drained and undrained triaxial stress paths. Results of predictions are shown in terms of the secant shear stiffness and fields of deviatoric strains. The analysis is completed with the prediction of the clay's behaviour along a drained true triaxial stress path in unloading.
Subjects E1
091402 Geomechanics and Resources Geotechnical Engineering
870304 Stone, Ceramics and Clay Materials
Q-Index Code E1
Q-Index Status Confirmed Code

 
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Created: Mon, 19 Apr 2010, 12:39:22 EST by Jeannette Watson on behalf of School of Civil Engineering