Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines

Koohyar Faizi; Asaad Faramarzi; Samir Dirar; David Chapman

doi:10.1007/978-3-319-99670-7_61

Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines

Koohyar Faizi, Asaad Faramarzi, Samir Dirar, David Chapman

University of Birmingham

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

1 Citation (Scopus)

Abstract

This paper presents the results of a series of numerical simulations predicting the performance of a novel hybrid suction caisson foundation used for offshore wind turbines under overturning moment. The proposed new winged foundation is a hybrid foundation system that utilises steel plate sections attached to a caisson shaft (also steel), to increase its overturning capacity. In this study, a numerical 3D finite-element model with an elasto-plastic soil constitutive model, is developed to simulate the soil-caisson interaction and evaluate the additional overturning capacity provided by the wings. Results indicate significant contribution of the wings to increases overturning capacity compared to a simple caisson foundation through changes in the failure mechanism. The increase in overturning resistance provided by placing wings on a caisson is illustrated by presenting the results for a suction caisson with aspect ratio (embedment length/diameter) of 1. The effect of shape and size of the wing on overturning capacity is investigated.

Original language	English
Title of host publication	Energy Geotechnics
Subtitle of host publication	SEG-2018
Editors	Alessio Ferrari, Lyesse Laloui
Publisher	Springer, Cham
Pages	495-501
Number of pages	7
Edition	1st
ISBN (Electronic)	9783319996707
ISBN (Print)	9783319996691, 9783030076221
DOIs	https://doi.org/10.1007/978-3-319-99670-7_61
Publication status	Published - 24 Aug 2018
Externally published	Yes
Event	International Symposium on Energy Geotechnics - EPFL, Lausanne, Switzerland Duration: 25 Sept 2018 → 28 Sept 2018 https://seg2018.epfl.ch/

Publication series

Name	Springer Series in Geomechanics and Geoengineering
Publisher	Springer
ISSN (Print)	1866-8755
ISSN (Electronic)	1866-8763

Conference

Conference	International Symposium on Energy Geotechnics
Abbreviated title	SEG 2018
Country/Territory	Switzerland
City	Lausanne
Period	25/09/18 → 28/09/18
Internet address	https://seg2018.epfl.ch/

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10.1007/978-3-319-99670-7_61Licence: Unspecified

Cite this

@inproceedings{dcfafb9fa603439db161a69281265063,

title = "Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines",

abstract = "This paper presents the results of a series of numerical simulations predicting the performance of a novel hybrid suction caisson foundation used for offshore wind turbines under overturning moment. The proposed new winged foundation is a hybrid foundation system that utilises steel plate sections attached to a caisson shaft (also steel), to increase its overturning capacity. In this study, a numerical 3D finite-element model with an elasto-plastic soil constitutive model, is developed to simulate the soil-caisson interaction and evaluate the additional overturning capacity provided by the wings. Results indicate significant contribution of the wings to increases overturning capacity compared to a simple caisson foundation through changes in the failure mechanism. The increase in overturning resistance provided by placing wings on a caisson is illustrated by presenting the results for a suction caisson with aspect ratio (embedment length/diameter) of 1. The effect of shape and size of the wing on overturning capacity is investigated.",

keywords = "Offshore Wind Turbines, Suction Caissons, Caisson Foundations, Moment-rotation Curve, Caisson Diameter",

author = "Koohyar Faizi and Asaad Faramarzi and Samir Dirar and David Chapman",

note = "Publisher Copyright: {\textcopyright} Springer Nature Switzerland AG 2019.; International Symposium on Energy Geotechnics, SEG 2018 ; Conference date: 25-09-2018 Through 28-09-2018",

year = "2018",

month = aug,

day = "24",

doi = "10.1007/978-3-319-99670-7\_61",

language = "English",

isbn = "9783319996691",

series = "Springer Series in Geomechanics and Geoengineering",

publisher = "Springer, Cham",

pages = "495--501",

editor = "Alessio Ferrari and Lyesse Laloui",

booktitle = "Energy Geotechnics",

address = "Switzerland",

edition = "1st",

url = "https://seg2018.epfl.ch/",

}

Faizi, K, Faramarzi, A, Dirar, S & Chapman, D 2018, Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines. in A Ferrari & L Laloui (eds), Energy Geotechnics: SEG-2018. 1st edn, Springer Series in Geomechanics and Geoengineering, Springer, Cham, pp. 495-501, International Symposium on Energy Geotechnics, Lausanne, Switzerland, 25/09/18. https://doi.org/10.1007/978-3-319-99670-7_61

Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines. / Faizi, Koohyar; Faramarzi, Asaad; Dirar, Samir et al.
Energy Geotechnics: SEG-2018. ed. / Alessio Ferrari; Lyesse Laloui. 1st. ed. Springer, Cham, 2018. p. 495-501 (Springer Series in Geomechanics and Geoengineering).

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

TY - GEN

T1 - Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines

AU - Faizi, Koohyar

AU - Faramarzi, Asaad

AU - Dirar, Samir

AU - Chapman, David

N1 - Publisher Copyright: © Springer Nature Switzerland AG 2019.

PY - 2018/8/24

Y1 - 2018/8/24

N2 - This paper presents the results of a series of numerical simulations predicting the performance of a novel hybrid suction caisson foundation used for offshore wind turbines under overturning moment. The proposed new winged foundation is a hybrid foundation system that utilises steel plate sections attached to a caisson shaft (also steel), to increase its overturning capacity. In this study, a numerical 3D finite-element model with an elasto-plastic soil constitutive model, is developed to simulate the soil-caisson interaction and evaluate the additional overturning capacity provided by the wings. Results indicate significant contribution of the wings to increases overturning capacity compared to a simple caisson foundation through changes in the failure mechanism. The increase in overturning resistance provided by placing wings on a caisson is illustrated by presenting the results for a suction caisson with aspect ratio (embedment length/diameter) of 1. The effect of shape and size of the wing on overturning capacity is investigated.

AB - This paper presents the results of a series of numerical simulations predicting the performance of a novel hybrid suction caisson foundation used for offshore wind turbines under overturning moment. The proposed new winged foundation is a hybrid foundation system that utilises steel plate sections attached to a caisson shaft (also steel), to increase its overturning capacity. In this study, a numerical 3D finite-element model with an elasto-plastic soil constitutive model, is developed to simulate the soil-caisson interaction and evaluate the additional overturning capacity provided by the wings. Results indicate significant contribution of the wings to increases overturning capacity compared to a simple caisson foundation through changes in the failure mechanism. The increase in overturning resistance provided by placing wings on a caisson is illustrated by presenting the results for a suction caisson with aspect ratio (embedment length/diameter) of 1. The effect of shape and size of the wing on overturning capacity is investigated.

KW - Offshore Wind Turbines

KW - Suction Caissons

KW - Caisson Foundations

KW - Moment-rotation Curve

KW - Caisson Diameter

UR - https://www.scopus.com/pages/publications/85053235828

U2 - 10.1007/978-3-319-99670-7_61

DO - 10.1007/978-3-319-99670-7_61

M3 - Conference contribution

AN - SCOPUS:85053235828

SN - 9783319996691

SN - 9783030076221

T3 - Springer Series in Geomechanics and Geoengineering

SP - 495

EP - 501

BT - Energy Geotechnics

A2 - Ferrari, Alessio

A2 - Laloui, Lyesse

PB - Springer, Cham

T2 - International Symposium on Energy Geotechnics

Y2 - 25 September 2018 through 28 September 2018

ER -

Finite Element Modelling of the Performance of Hybrid Foundation Systems for Offshore Wind Turbines

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