Cormack Professor of Civil Engineering
Comments on use of the Barcelona Basic Model for unsaturated soils
Article first published online: 11 NOV 2002
Copyright © 2002 John Wiley & Sons, Ltd.
International Journal for Numerical and Analytical Methods in Geomechanics
Volume 26, Issue 15, pages 1561–1571, 25 December 2002
How to Cite
Wheeler, S. J., Gallipoli, D. and Karstunen, M. (2002), Comments on use of the Barcelona Basic Model for unsaturated soils. Int. J. Numer. Anal. Meth. Geomech., 26: 1561–1571. doi: 10.1002/nag.259
- Issue published online: 11 NOV 2002
- Article first published online: 11 NOV 2002
- Manuscript Revised: 30 AUG 2002
- Manuscript Received: 30 NOV 2001
The paper discusses some aspects of the Barcelona Basic Model (BBM), which is one of the most widely used elasto-plastic models for unsaturated soils. In addition to modelling those unsaturated soils where the collapse potential increases with increasing net stress (as envisaged by the original authors), the BBM can also be used to model soils where the collapse potential decreases with increasing net stress, by selecting suitable values for the model parameters r and pc. A practical procedure is suggested for selecting a value for the important model parameter pc from laboratory test data. Problems with use of the BBM are discussed, including the difficulty of correctly matching the locations of the normal compression lines for different values of suction and the possibility of non-convexity of the yield curve. Copyright © 2002 John Wiley & Sons, Ltd.