Finite element modelling of winged suction caissons in clay under uniaxial and combined loading
Research output: Contribution to conference (unpublished) › Paper › peer-review
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Finite element modelling of winged suction caissons in clay under uniaxial and combined loading. / Darby, Laurence; Faramarzi, Asaad; Faizi, Koohyar; Mehravar, Moura; Harireche, Ouahid.
2019. Paper presented at 2nd International Conference on Natural Hazards and Infrastructure, Chania, Greece.Research output: Contribution to conference (unpublished) › Paper › peer-review
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T1 - Finite element modelling of winged suction caissons in clay under uniaxial and combined loading
AU - Darby, Laurence
AU - Faramarzi, Asaad
AU - Faizi, Koohyar
AU - Mehravar, Moura
AU - Harireche, Ouahid
PY - 2019/6/23
Y1 - 2019/6/23
N2 - Suction caisson foundations, also known as skirted foundations, have recently become a relatively popular solution to support offshore wind turbines. These foundations however, have limited capacity compared to monopiles, particularly when exposed to combined loads reflective of those imposed by offshore wind turbines. The situation may become worse with the introduction of hyper-tall wind turbines and the increasing intensity of storms, including the possibility of hurricanes, which will impose large torsional and overturning moments on the superstructure. This study proposes an innovative solution for foundations of offshore wind turbines in the form of a winged suction caisson which can enhance the torsional capacity of the foundation. In this research, finite element models of the proposed foundation are developed to study its performance in clay under torsional loading combined with horizontal and overturning loads. The results are presented graphically using failure envelopes. The results show a substantial improvement in the overall capacity of the foundation with the addition of wings under combined loading (at least over 40% increase) compared to a conventional suction caisson foundation.
AB - Suction caisson foundations, also known as skirted foundations, have recently become a relatively popular solution to support offshore wind turbines. These foundations however, have limited capacity compared to monopiles, particularly when exposed to combined loads reflective of those imposed by offshore wind turbines. The situation may become worse with the introduction of hyper-tall wind turbines and the increasing intensity of storms, including the possibility of hurricanes, which will impose large torsional and overturning moments on the superstructure. This study proposes an innovative solution for foundations of offshore wind turbines in the form of a winged suction caisson which can enhance the torsional capacity of the foundation. In this research, finite element models of the proposed foundation are developed to study its performance in clay under torsional loading combined with horizontal and overturning loads. The results are presented graphically using failure envelopes. The results show a substantial improvement in the overall capacity of the foundation with the addition of wings under combined loading (at least over 40% increase) compared to a conventional suction caisson foundation.
KW - suction caisson foundation
KW - offshore wind turbines
KW - undrained
KW - torsion
KW - combined loading
UR - https://iconhic.com/2019/
M3 - Paper
T2 - 2nd International Conference on Natural Hazards and Infrastructure
Y2 - 23 June 2019 through 26 June 2019
ER -