Integration of Transverse Isotropy in the Instantaneous Behaviour of Geomaterials with Application to Numerical Modelling of Underground Structures

The paper deals with the integration of structural anisotropy in a pre-existing constitutive law for rocks, dedicated to the numerical modelling of underground structures. On the basis of bibliographic study, two approaches were selected and applied to a simple constitutive law to begin with, namely...

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Veröffentlicht in:Geotechnical and geological engineering Jg. 38; H. 5; S. 4917 - 4938
Hauptverfasser: Djouadi, Inès, Giot, Richard, Raude, Simon, Cuvilliez, Sam, Laigle, François, Fernandes, Roméo
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Cham Springer International Publishing 01.10.2020
Springer Nature B.V
Springer Verlag
Schlagworte:
Anisotropy
Civil Engineering
Computer Science
Earth and Environmental Science
Earth Sciences
Engineering Sciences
Fabrics
Finite element method
Geomaterials
Geotechnical Engineering & Applied Earth Sciences
Géotechnique
Hydrogeology
Integration
Isotropy
Mathematical analysis
Mathematical models
Modeling and Simulation
Modelling
Original Paper
Tensors
Terrestrial Pollution
Underground structures
Waste Management/Waste Technology
Transverse isotropy
Fabric tensor
Weakness plane
Numerical modelling
Geomaterial
ISSN:0960-3182, 1573-1529
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Zusammenfassung:The paper deals with the integration of structural anisotropy in a pre-existing constitutive law for rocks, dedicated to the numerical modelling of underground structures. On the basis of bibliographic study, two approaches were selected and applied to a simple constitutive law to begin with, namely the Drucker–Prager model. The two appraoches considered are the fabric tensor approach and the weakness plane approach. Both approaches are described, the equations are provided and the resulting anisotropic models are implemented in the open source finite element software (Code_Aster in EDF R&D code général pour l’étude du comportement mécanique des structures diffusé sous licence GNU GPL, 2017). The models are then applied to the simplified numerical modelling of an underground facility and the main results are provided. The main advantages and drawbacks of both approaches are highlighted. The main findings of this work is that the fabric tensor approach is the most fitted for the material considered for the future prospects. The future prospects are the integration of anisotropy in a much more complex isotropic model being developed by EDF research team for application to geomaterials.
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ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-020-01336-z