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Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides
The choice of a pure cohesive or a pure frictional viscoplastic model to represent the rheological behaviour of a flowslide is of paramount importance in order to obtain accurate results for real cases. The principal goal of the present work is to clarify the influence of the type of viscous model—p...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458986/ https://www.ncbi.nlm.nih.gov/pubmed/28772924 http://dx.doi.org/10.3390/ma10050562 |
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author | Dutto, Paola Stickle, Miguel Martin Pastor, Manuel Manzanal, Diego Yague, Angel Moussavi Tayyebi, Saeid Lin, Chuan Elizalde, Maria Dolores |
author_facet | Dutto, Paola Stickle, Miguel Martin Pastor, Manuel Manzanal, Diego Yague, Angel Moussavi Tayyebi, Saeid Lin, Chuan Elizalde, Maria Dolores |
author_sort | Dutto, Paola |
collection | PubMed |
description | The choice of a pure cohesive or a pure frictional viscoplastic model to represent the rheological behaviour of a flowslide is of paramount importance in order to obtain accurate results for real cases. The principal goal of the present work is to clarify the influence of the type of viscous model—pure cohesive versus pure frictional—with the numerical reproduction of two different real flowslides that occurred in 1966: the Aberfan flowslide and the Gypsum tailings impoundment flowslide. In the present work, a depth-integrated model based on the [Formula: see text] Biot–Zienkiewicz formulation, enhanced with a diffusion-like equation to account for the pore pressure evolution within the soil mass, is applied to both 1966 cases. For the Aberfan flowslide, a frictional viscous model based on Perzyna viscoplasticity is considered, while a pure cohesive viscous model (Bingham model) is considered for the case of the Gypsum flowslide. The numerical approach followed is the SPH method, which has been enriched by adding a 1D finite difference grid to each SPH node in order to improve the description of the pore water evolution in the propagating mixture. The results obtained by the performed simulations are in agreement with the documentation obtained through the UK National Archive (Aberfan flowslide) and the International Commission of large Dams (Gypsum flowslide). |
format | Online Article Text |
id | pubmed-5458986 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54589862017-07-28 Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides Dutto, Paola Stickle, Miguel Martin Pastor, Manuel Manzanal, Diego Yague, Angel Moussavi Tayyebi, Saeid Lin, Chuan Elizalde, Maria Dolores Materials (Basel) Article The choice of a pure cohesive or a pure frictional viscoplastic model to represent the rheological behaviour of a flowslide is of paramount importance in order to obtain accurate results for real cases. The principal goal of the present work is to clarify the influence of the type of viscous model—pure cohesive versus pure frictional—with the numerical reproduction of two different real flowslides that occurred in 1966: the Aberfan flowslide and the Gypsum tailings impoundment flowslide. In the present work, a depth-integrated model based on the [Formula: see text] Biot–Zienkiewicz formulation, enhanced with a diffusion-like equation to account for the pore pressure evolution within the soil mass, is applied to both 1966 cases. For the Aberfan flowslide, a frictional viscous model based on Perzyna viscoplasticity is considered, while a pure cohesive viscous model (Bingham model) is considered for the case of the Gypsum flowslide. The numerical approach followed is the SPH method, which has been enriched by adding a 1D finite difference grid to each SPH node in order to improve the description of the pore water evolution in the propagating mixture. The results obtained by the performed simulations are in agreement with the documentation obtained through the UK National Archive (Aberfan flowslide) and the International Commission of large Dams (Gypsum flowslide). MDPI 2017-05-20 /pmc/articles/PMC5458986/ /pubmed/28772924 http://dx.doi.org/10.3390/ma10050562 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dutto, Paola Stickle, Miguel Martin Pastor, Manuel Manzanal, Diego Yague, Angel Moussavi Tayyebi, Saeid Lin, Chuan Elizalde, Maria Dolores Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides |
title | Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides |
title_full | Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides |
title_fullStr | Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides |
title_full_unstemmed | Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides |
title_short | Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides |
title_sort | modelling of fluidised geomaterials: the case of the aberfan and the gypsum tailings impoundment flowslides |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458986/ https://www.ncbi.nlm.nih.gov/pubmed/28772924 http://dx.doi.org/10.3390/ma10050562 |
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