Undrained instability of very loose Hostun sand in triaxial compression and extension. Part 2: theoretical analysis using an elastoplasticity model
✍ Scribed by Ph. Dubujet; T. Doanh
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 166 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1082-5010
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✦ Synopsis
The characteristics of the loss of stability associated with the initiation of the static liquefaction phenomenon is obtained using the CJS model within the elastoplasticity framework. This model is based on the characteristic line concept. The determining factors involved in the prediction of this phenomenon and in the modelling process are identified. The importance of the elastic components is highlighted, in particular its non-linearity. The possibilities and the limits of the proposed model to describe the undrained behaviour of very loose sand are examined, taking into consideration the effects of the more or less complex stress history. Finally, the conditions leading to the appearance of the uniqueness domain are indicated. The findings of this theoretical study rely entirely on the experimental data presented in a companion paper, with emphasis on the triaxial tests on anisotropically consolidated samples.