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Axisymmetric transient modelling of a suction caisson in dense sand

Axisymmetric transient modelling of a suction caisson in dense sand
Axisymmetric transient modelling of a suction caisson in dense sand
Suction caisson are hollow cylinders open towards the bottom that are currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for offshore wind turbines in shallow water (Senders 2009). The Prevost model for cohesionless soils (Prevost 1985) is currently used for the modelling of their cyclic behaviour. It’s able to reproduce plastic deformation in both loading and unloading, contractancy of the soil and pore pressure build up as well. In this paper, a fully- coupled transient axisymmetric analysis of a suction caisson is carried out. A vertical pseudo-random loading is transformed into equivalent ones. Comparison of the permanent displacement accumulated shows a good agreement between them. The influence of the interface conditions is also addressed. For low tension amplitude applied to the caisson, it can be modelled as “stuck” to the inner soil. However higher amplitude might lead to a total unplugging.
Offshore geotechnics, Cyclic modelling, Suction caisson
CRC Press
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Levasseur, Séverine
f66c7e83-a6f2-4bfc-8b51-4f839b08bf14
Collin, Frédéric
27fa6a2d-f8e2-473f-a3b2-070eca6a9c3a
Charlier, Robert
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Brinkgreve, Ronald B.J.
16ede4eb-513f-4d6c-8c7b-9b26e2196e3c
Hicks, Michael A.
f22aa7ad-d758-4dd8-8a3d-312a487e3bde
Brinkgreve, Ronald B. J.
ea380905-5f5e-48d8-b794-a78c927217aa
Rohe, Alexander
4b207d5e-6cc1-4a9b-a13b-d860cf5084c9
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Levasseur, Séverine
f66c7e83-a6f2-4bfc-8b51-4f839b08bf14
Collin, Frédéric
27fa6a2d-f8e2-473f-a3b2-070eca6a9c3a
Charlier, Robert
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Brinkgreve, Ronald B.J.
16ede4eb-513f-4d6c-8c7b-9b26e2196e3c
Hicks, Michael A.
f22aa7ad-d758-4dd8-8a3d-312a487e3bde
Brinkgreve, Ronald B. J.
ea380905-5f5e-48d8-b794-a78c927217aa
Rohe, Alexander
4b207d5e-6cc1-4a9b-a13b-d860cf5084c9

Cerfontaine, Benjamin, Levasseur, Séverine, Collin, Frédéric, Charlier, Robert and Brinkgreve, Ronald B.J. (2014) Axisymmetric transient modelling of a suction caisson in dense sand. In, Hicks, Michael A., Brinkgreve, Ronald B. J. and Rohe, Alexander (eds.) Numerical Methods in Geotechnical Engineering: 2. CRC Press.

Record type: Book Section

Abstract

Suction caisson are hollow cylinders open towards the bottom that are currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for offshore wind turbines in shallow water (Senders 2009). The Prevost model for cohesionless soils (Prevost 1985) is currently used for the modelling of their cyclic behaviour. It’s able to reproduce plastic deformation in both loading and unloading, contractancy of the soil and pore pressure build up as well. In this paper, a fully- coupled transient axisymmetric analysis of a suction caisson is carried out. A vertical pseudo-random loading is transformed into equivalent ones. Comparison of the permanent displacement accumulated shows a good agreement between them. The influence of the interface conditions is also addressed. For low tension amplitude applied to the caisson, it can be modelled as “stuck” to the inner soil. However higher amplitude might lead to a total unplugging.

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More information

Published date: 29 May 2014
Additional Information: © 2017 CRC Press, Taylor & Francis Group, an Informa Group company.
Keywords: Offshore geotechnics, Cyclic modelling, Suction caisson

Identifiers

Local EPrints ID: 444219
URI: http://eprints.soton.ac.uk/id/eprint/444219
PURE UUID: 6b22c876-51a8-45a6-ae4e-c1f17d009a9f
ORCID for Benjamin Cerfontaine: ORCID iD orcid.org/0000-0002-4833-9412

Catalogue record

Date deposited: 01 Oct 2020 16:34
Last modified: 02 Oct 2020 01:53

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Contributors

Author: Séverine Levasseur
Author: Frédéric Collin
Author: Robert Charlier
Author: Ronald B.J. Brinkgreve
Editor: Michael A. Hicks
Editor: Ronald B. J. Brinkgreve
Editor: Alexander Rohe

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