| Issue |
E3S Web of Conf.
Volume 382, 2023
8th International Conference on Unsaturated Soils (UNSAT 2023)
|
|
|---|---|---|
| Article Number | 15005 | |
| Number of page(s) | 6 | |
| Section | Physical, Numerical and Constitutive Modelling - Part II | |
| DOI | https://doi.org/10.1051/e3sconf/202338215005 | |
| Published online | 24 April 2023 | |
Finite element modelling of unsaturated soils using a modified version of the Barcelona Basic Model
1 Seequent, The Bentley Subsurface Company, Italy
2 Seequent, The Bentley Subsurface Company, The Netherlands
* Corresponding author: anita.laera@bentley.com
In this paper, unsaturated soil behaviour is numerically simulated using a modified version of the Barcelona Basic Model. The model has been implemented as a User-Defined Soil Model (UDSM) in the finite element code PLAXIS. Unlike the original formulation based on net stress ([1]), this model isformulated based on the well-known Bishop’s effective stress, with suction as an additional stress variable. Furthermore, a non-associated flow rule and the dependency on Lode’s angle proposed by [2] are incorporated. The Soil Water Characteristic Curve (SWCC) follows the Van Genuchten model ([3]). First, the simulation of laboratory tests along different stress paths and levels of suction are compared againstexperimental data. Then, an unsaturated soil embankment subject to a time-dependent precipitation is simulated by means of a fully coupled flow-deformation analysis. The results show the capability of the model to reproduce the main features of unsaturated soil behaviour both at material point level and inboundary value problems.
© The Authors, published by EDP Sciences, 2023
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