Axisymmetric transient modelling of a suction caisson in dense sand

Benjamin Cerfontaine; Séverine Levasseur; Frédéric Collin; Robert Charlier; Ronald B.J. Brinkgreve

Axisymmetric transient modelling of a suction caisson in dense sand

Benjamin Cerfontaine
, Séverine Levasseur
, Frédéric Collin
, Robert Charlier
, Ronald B.J. Brinkgreve

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	Numerical Methods in Geotechnical Engineering
Editors	Michael A. Hicks, Ronald B. J. Brinkgreve, Alexander Rohe
Publisher	CRC Press
Pages	1243-1248
Number of pages	6
ISBN (Print)	9781138001466
Publication status	Published - 29 May 2014

Keywords

Offshore geotechnics
Cyclic modelling
Suction caisson

Access to Document

http://hdl.handle.net/2268/169497

Cite this

@inproceedings{3c6a97570dfe46a9bc6527c383aab32a,

title = "Axisymmetric transient modelling of a suction caisson in dense sand",

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{\textquoteright}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 {\textquotedblleft}stuck{\textquotedblright} to the inner soil. However higher amplitude might lead to a total unplugging.",

keywords = "Offshore geotechnics, Cyclic modelling, Suction caisson",

author = "Benjamin Cerfontaine and S{\'e}verine Levasseur and Fr{\'e}d{\'e}ric Collin and Robert Charlier and Brinkgreve, \{Ronald B.J.\}",

note = "{\textcopyright} 2017 CRC Press, Taylor \& Francis Group, an Informa Group company.",

year = "2014",

month = may,

day = "29",

language = "English",

isbn = "9781138001466",

pages = "1243--1248",

editor = "Hicks, \{Michael A.\} and Brinkgreve, \{Ronald B. J.\} and Alexander Rohe",

booktitle = "Numerical Methods in Geotechnical Engineering",

publisher = "CRC Press",

}

Axisymmetric transient modelling of a suction caisson in dense sand. / Cerfontaine, Benjamin; Levasseur, Séverine; Collin, Frédéric et al.
Numerical Methods in Geotechnical Engineering. ed. / Michael A. Hicks; Ronald B. J. Brinkgreve; Alexander Rohe. CRC Press, 2014. p. 1243-1248.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Axisymmetric transient modelling of a suction caisson in dense sand

AU - Cerfontaine, Benjamin

AU - Levasseur, Séverine

AU - Collin, Frédéric

AU - Charlier, Robert

AU - Brinkgreve, Ronald B.J.

PY - 2014/5/29

Y1 - 2014/5/29

N2 - 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.

AB - 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.

KW - Offshore geotechnics

KW - Cyclic modelling

KW - Suction caisson

M3 - Conference contribution

SN - 9781138001466

SP - 1243

EP - 1248

BT - Numerical Methods in Geotechnical Engineering

A2 - Hicks, Michael A.

A2 - Brinkgreve, Ronald B. J.

A2 - Rohe, Alexander

PB - CRC Press

ER -

Axisymmetric transient modelling of a suction caisson in dense sand

Abstract

Keywords

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