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Vertical transient loading of a suction caisson in dense sand

Vertical transient loading of a suction caisson in dense sand
Vertical transient loading of a suction caisson in dense sand
Suction caissons are hollow cylinders open towards the bottom 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 adapted for the modelling of their cyclic behaviour. It is 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. The monotonic partially drained behaviour of the caisson is firstly highlighted. Afterwards, pseudo-random and sinusoidal-equivalent storm signals are compared. Permanent displacements accumulated at the end of the storm show a good agreement between them but are slightly divergent, which indicates that the position of the extreme event might be a relevant issue.
Offshore Geotechnics, Cyclic modelling, Prevost model
CRC Press
Collin, Frédéric
27fa6a2d-f8e2-473f-a3b2-070eca6a9c3a
Charlier, Robert
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Oka, Fusao
abcdee1a-6757-4cbe-9f89-dbe9b19fa421
Murakami, Akira
d9984415-a7dd-4170-9108-3bc295122aa8
Uzuoka, Ryosuke
a1bbc53b-2d6d-47e4-a30c-28933e901bad
Kimoto, Sayuri
b2d8ac4d-6334-4982-8a86-c75147731285
Collin, Frédéric
27fa6a2d-f8e2-473f-a3b2-070eca6a9c3a
Charlier, Robert
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Oka, Fusao
abcdee1a-6757-4cbe-9f89-dbe9b19fa421
Murakami, Akira
d9984415-a7dd-4170-9108-3bc295122aa8
Uzuoka, Ryosuke
a1bbc53b-2d6d-47e4-a30c-28933e901bad
Kimoto, Sayuri
b2d8ac4d-6334-4982-8a86-c75147731285

Collin, Frédéric and Charlier, Robert (2015) Vertical transient loading of a suction caisson in dense sand. Cerfontaine, Benjamin, Oka, Fusao, Murakami, Akira, Uzuoka, Ryosuke and Kimoto, Sayuri (eds.) In 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014. CRC Press. 6 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Suction caissons are hollow cylinders open towards the bottom 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 adapted for the modelling of their cyclic behaviour. It is 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. The monotonic partially drained behaviour of the caisson is firstly highlighted. Afterwards, pseudo-random and sinusoidal-equivalent storm signals are compared. Permanent displacements accumulated at the end of the storm show a good agreement between them but are slightly divergent, which indicates that the position of the extreme event might be a relevant issue.

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More information

Published date: 2015
Keywords: Offshore Geotechnics, Cyclic modelling, Prevost model

Identifiers

Local EPrints ID: 444217
URI: http://eprints.soton.ac.uk/id/eprint/444217
PURE UUID: 32c117f1-bb7d-4f8c-84bb-16d6b435d800
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: Frédéric Collin
Author: Robert Charlier
Editor: Fusao Oka
Editor: Akira Murakami
Editor: Ryosuke Uzuoka
Editor: Sayuri Kimoto

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