Investigation of the load-bearing capacity of suction caissons used for offshore wind turbines

Bagheri, Pouyan; Son, Su Won; Kim, Jin Man

doi:10.1016/j.apor.2017.07.002

Cited by 30 publications

(14 citation statements)

References 17 publications

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“…Park et al [112] proposed a series of equations for calculating the bearing capacity of bucket foundations in sand, and recommended combined shape-depth factors for calculating the shaft bearing capacity of a bucket foundation. Bagheri et al [113] recently carried out an analysis of offshore wind turbine bucket foundations, and investigated the bearing behaviour of the bucket and the response of soil supporting the bucket in dense and medium dense sandy soils subjected to static horizontal loading.…”

Section: Capacity Of Bucket Foundations Under Monotonic Loadingmentioning

confidence: 99%

Foundations of offshore wind turbines: A review

et al. 2019

Renewable and Sustainable Energy Reviews

354

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Offshore wind is a source of clean, renewable energy of great potential value to the power industry in the context of a low carbon society. Rapid development of offshore wind energy depends on a good understanding of technical issues related to offshore wind turbines, which is spurring ongoing research and development programmes. Foundations of offshore wind turbines present one of the main challenges in offshore wind turbine design. This paper reviews the present state of knowledge concerning geotechnical and structural issues affecting foundation types under consideration for the support structures of offshore wind turbines, and provides recommendations for future research and development.

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Section: Capacity Of Bucket Foundations Under Monotonic Loadingmentioning

confidence: 99%

Foundations of offshore wind turbines: A review

et al. 2019

Renewable and Sustainable Energy Reviews

354

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“…The finite element method (FEM) can be used as an effective instrument to deal with various complex geotechnical engineering problems, and it can be used to evaluate the bearing capacity of the bucket foundations under different loads [25]. A three-dimensional finite element method for the bearing capacity behavior of CBF is established by using the universal finite element analysis software ABAQUS [26], as shown in Figure 3.…”

Section: Finite Element Modelmentioning

confidence: 99%

“…The skirt was made of 12 mm thick steel plate. The soil consisted of very dense fine sand with a unit weight of 19.5 kN/m 3 [25,27]. Figure 4 illustrates the comparison between the test results of the moment-rotation curve, with the predicted result obtained from the numerical analysis by ABAQUS.…”

Section: Validation Of the Modelmentioning

confidence: 99%

Bearing Capacity Characteristics of Composite Bucket Foundation Under Torque Loading

Zhang

et al. 2019

Energies

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The composite bucket foundation for offshore wind turbine bears the vertical load from not only the superstructure and the horizontal load, caused by wind and wave, but also from the torque load caused by rotating structures, such as blades. Based on layered soil foundation, the influence of the skirt height, the friction coefficient between soil and bucket foundation and the diameter of the bucket foundation on the stress of the bucket skirt under the torque load are studied in this paper. Moreover, the envelope curves of the bearing capacity of H–T and V–H–T are obtained by the fixed displacement ratio loading method. The bearing capacity characteristics of composite bucket foundation under different loading combinations are analyzed. The results show that: (1) The effect of inside soil on the bucket skirt is greater than that of the outside soil; (2) when composite loads are applied, the torque-bearing capacity decreases slowly with the increase of horizontal force, and when the horizontal force increases to a certain value, the value of the torque decreases significantly; and (3) the shape of the H–T failure envelope of the bucket foundation has no obvious change, vertical load have less effect on horizontal and torque load.

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“…An average penetration depth was considered for estimation of equivalent modulus of elasticity. The modulus of elasticity(E), 210GPa and Poisson'sratio (ν), 0.3 were used as the steel properties [48].…”

Section: Validation Of Finite Element Modelling Against Large-scale F...mentioning

confidence: 99%

Investigating the monotonic behaviour of hybrid tripod suction bucket foundations for offshore wind towers in sand

Faizi

Faramarzi

Dirar

et al. 2019

Applied Ocean Research

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Existing tripod suction bucket foundations, utilised for offshore wind turbines, are required to resist significant lateral loads and overturning moments generated by wind and currents. This paper presents an innovative type of tripod bucket foundation, 'hybrid tripod bucket foundation', for foundations of offshore wind turbines, which has the ability to provide a larger overturning capacity compared with conventional tripod buckets. The proposed foundation consists of a conventional tripod bucket combined with three large circular mats attached to each bucket. A series of experiments were conducted on small-scale models of the proposed foundation subjected to overturning moment under 1g conditions in loose sand. Different circular mat diameter sizes with various bucket spacings were considered and the results were compared with conventional tripod bucket foundation. Finite element models of the proposed foundation were developed and validated using experimental results and were used to conduct a parametric study to understand the behaviour of the hybrid tripod bucket foundation. The results showed that there is a significant increase in overturning capacity provided by the novel foundation. The results of this work can significantly improve lowering the costs associated with installation of foundations to support offshore wind turbines.

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Investigation of the load-bearing capacity of suction caissons used for offshore wind turbines

Cited by 30 publications

References 17 publications

Foundations of offshore wind turbines: A review

Foundations of offshore wind turbines: A review

Bearing Capacity Characteristics of Composite Bucket Foundation Under Torque Loading

Investigating the monotonic behaviour of hybrid tripod suction bucket foundations for offshore wind towers in sand

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