Improvement of a hypoplastic model to predict clay behaviour under undrained conditions |
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Authors: | David Ma?ín Ivo Herle |
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Institution: | 1. Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Charles University, Albertov 6, 12843, Prague 2, Czech Republic 2. Institute of Geotechnical Engineering, Technische Universit?t Dresden, 01062, Dresden, Germany
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Abstract: | A shortcoming of the hypoplastic model for clays proposed by the first author is an incorrect prediction of the initial portion
of the undrained stress path, particularly for tests on normally consolidated soils at isotropic stress states. A conceptually
simple modification of this model, which overcomes this drawback, is proposed in the contribution. The modified model is applicable
to both normally consolidated and overconsolidated soils and predicts the same swept-out-memory states (i.e., normal compression
lines) as the original model. At anisotropic stress states and at higher overconsolidation ratios the modified model yields
predictions similar to the original model. |
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Keywords: | Clay Hypoplasticity Non-linearity Response envelopes Undrained stress path |
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