Machaček, Jan ; Nitsch, Antonia ; Wichtmann, Torsten ; Grandas Tavera, Carlos Eduardo (2024)
Numerical Modelling of Expansive Geomaterials: Finite Element Formulation and Constitutive Models.
In: Computers and Geotechnics, 176
doi: 10.1016/j.compgeo.2024.106739
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The successful simulation of the behaviour of expansive soils using FEM strongly depends on the acting hydromechanical processes and their proper consideration. During swelling processes, part of the pore water is bound to the solid. However, the associated change of volume fractions in the porous medium and its contribution to the overall material behaviour is not accounted for in most numerical frameworks. In this paper, a numerical framework based on the Theory of Porous Media (TPM) and a three-dimensional hydro-mechanically coupled hypoplastic constitutive model for expansive soils are proposed. The TPM includes a distinct swelling water phase that does not participate in the flow through the pore space. A bidirectional mass transport enables the transition from free to swelling water during change in water content. By consistent balancing in the governing equations, the swelling induced reduction of hydraulic conductivity is directly accounted for. The performance of the proposed framework is demonstrated by back calculation of laboratory tests on different materials. Its capabilities to simulate complex loading paths in (un)saturated conditions with a single set of parameters are shown.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Machaček, Jan ; Nitsch, Antonia ; Wichtmann, Torsten ; Grandas Tavera, Carlos Eduardo |
| Art des Eintrags: | Bibliographie |
| Titel: | Numerical Modelling of Expansive Geomaterials: Finite Element Formulation and Constitutive Models |
| Sprache: | Englisch |
| Publikationsjahr: | 2024 |
| Ort: | Amsterdam |
| Verlag: | Elsevier BV |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Computers and Geotechnics |
| Jahrgang/Volume einer Zeitschrift: | 176 |
| Kollation: | 14 Seiten |
| DOI: | 10.1016/j.compgeo.2024.106739 |
| URL / URN: | https://www.sciencedirect.com/science/article/pii/S0266352X2... |
| Kurzbeschreibung (Abstract): | The successful simulation of the behaviour of expansive soils using FEM strongly depends on the acting hydromechanical processes and their proper consideration. During swelling processes, part of the pore water is bound to the solid. However, the associated change of volume fractions in the porous medium and its contribution to the overall material behaviour is not accounted for in most numerical frameworks. In this paper, a numerical framework based on the Theory of Porous Media (TPM) and a three-dimensional hydro-mechanically coupled hypoplastic constitutive model for expansive soils are proposed. The TPM includes a distinct swelling water phase that does not participate in the flow through the pore space. A bidirectional mass transport enables the transition from free to swelling water during change in water content. By consistent balancing in the governing equations, the swelling induced reduction of hydraulic conductivity is directly accounted for. The performance of the proposed framework is demonstrated by back calculation of laboratory tests on different materials. Its capabilities to simulate complex loading paths in (un)saturated conditions with a single set of parameters are shown. |
| Freie Schlagworte: | Expansive soils, Hypoplasticity, Swelling pressure, Swelling strain, Theory of porous media |
| ID-Nummer: | Artikel-ID: 106739 |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Geotechnik |
| Hinterlegungsdatum: | 18 Sep 2024 06:14 |
| Letzte Änderung: | 11 Okt 2024 07:06 |
| PPN: | 522171486 |
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