Deflection-Based Bearing Capacity of Suction Caisson Foundations of Offshore Wind Turbines

Zhu, Bin; Zhang, Wenlong; Ying, Panpan; Chen, Yunmin

doi:10.1061/(asce)gt.1943-5606.0001107

Cited by 51 publications

(5 citation statements)

References 14 publications

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“…The envelope holding capacity of the caisson may be computed following (Supachawarote, et al, 2004) and (Randolph & Gourvenec, 2011) Readers are also referred to (Villalobos, 2006), (Zhu, et al, 2014), (Schakenda, et al, 2011) where other formulations are provided for the capacity of suction caissons in cohesive and cohesionless ground profiles. It is also important to note that the installation plays a critical role in the sizing of suction caissons.…”

Section: 524 Combination Of Caisson Horizontal Loadingmentioning

confidence: 99%

Concept design of jacket foundations for offshore wind turbines in 10 steps

Jalbi

Bhattacharya

2020

Soil Dynamics and Earthquake Engineering

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Section: 524 Combination Of Caisson Horizontal Loadingmentioning

confidence: 99%

Concept design of jacket foundations for offshore wind turbines in 10 steps

Jalbi

Bhattacharya

2020

Soil Dynamics and Earthquake Engineering

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“…A number of studies on caisson foundations were carried out to investigate the influence of the aspect ratio L/D, experimental (Cassidy et al, 2006;Houlsby et al, 2005;Ibsen et al, 2013Ibsen et al, , 2015Tran and Kim, 2017;Zhang et al, 2007;Zhu et al, 2014) and numerical (Cassidy et al, 2006;Cheng et al, 2016;Gerolymos et al, 2012;Li et al, 2015;Liu et al, 2014;Zafeirakos and Gerolymos, 2016). In these studies, the L was changed while D was kept constant (or vice versa) and therefore the contact surface area was different.…”

Section: Influence Of the Aspect Ratio L/d For The Same Soil-structurmentioning

confidence: 99%

Advanced numerical modelling of caisson foundations in sand to investigate the failure envelope in the H-M-V space

et al. 2019

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This paper focuses on the identification of the failure envelope of a caisson foundation in sand using an advanced critical state-based sand model (SIMSAND) and the Combined Lagrangian Smoothed Particle Hydrodynamics Method (CLSPH). The parameters of the SIMSAND constitutive model are first calibrated using triaxial tests on Baskarp sand. In order to validate the combined CLSPH-SIMSAND approach, a cone penetration test, model tests and a field test on a reduced scale caisson foundation are simulated. After full numerical validations with different scales from laboratory to in-situ conditions, a numerical parametrical study is then introduced considering different sand properties (density, friction angle, deformability, crushability) and caisson dimensions (soil-structure contact surface area, diameter-depth ratio) and complex combined loading paths to identify the failure envelope in the horizontal force (H), bending moment (M), vertical force (V) space. The influence of the caisson foundation contact surface area, aspect ratio and soil parameters are considered and quantified. Finally, an analytical formula is proposed for the 3D failure envelope in the H-M-V space.

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“…The bearing capacity of the single suction bucket foundations has been extensively studied in different soil types [15,[18][19][20], whereas only a few studies have examined the behaviour of tripod suction bucket foundations under lateral loading [21][22][23].…”

Section: Take Down Policymentioning

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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Deflection-Based Bearing Capacity of Suction Caisson Foundations of Offshore Wind Turbines

Cited by 51 publications

References 14 publications

Concept design of jacket foundations for offshore wind turbines in 10 steps

Concept design of jacket foundations for offshore wind turbines in 10 steps

Advanced numerical modelling of caisson foundations in sand to investigate the failure envelope in the H-M-V space

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

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