Modified expression for the failure criterion of bucket foundations subjected to combined loading

Barari, Amin

doi:10.1139/cgj-2012-0308

Cited by 38 publications

(25 citation statements)

References 22 publications

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“…Panayides et al [22] developed the results of a numerical study into the bearing capacity and failure mechanisms of suction caissons founded in structured clays using an advanced soil constitutive model. Larsen et al [23] investigated the behavior of suction buckets with varying sizes, aspect ratios, and load paths under combined loads using the results of experimental studies on the saturated dense Aalborg University Sand. Foglia et al [24] formulated and validated a macro-element model for suction buckets against small-scale experimental results.…”

Section: Literature Reviewmentioning

confidence: 99%

Evaluation of behavior of bucket foundations under pure loading

Ghaseminejad

Rowshanzamir

2017

Scientia Iranica

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Abstract. O shore wind turbine as a green renewable resource can have important roles in changing energy structure. In this study, the results of three-dimensional nite-element analyses of the pure horizontal, vertical, and moment loading of bucket foundations in medium-dense sand are presented. Sensitivity analyses have been performed on di erent bucket diameters and length-to-diameter aspect ratios (L=D); the responses for pure horizontal, vertical, and moment loading have been compared with each other. To determine the pure horizontal, vertical, and moment-bearing capacities of the bucket foundation, di erent methods have been compared. Charts and functions derived from nite-element results and responses are presented as failure envelopes in M H plane. The results show that pure ultimate capacity of the bucket signi cantly depends on bucket geometry and aspect ratio.

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Section: Literature Reviewmentioning

confidence: 99%

Evaluation of behavior of bucket foundations under pure loading

Ghaseminejad

Rowshanzamir

2017

Scientia Iranica

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“…Recently, such structures have been developed extensively in Europe (e.g., see [27,2,[4][5][6][7]29,22,23,24,9,15,28]). Foundation concepts that are frequently used for offshore wind turbines include monopiles, jackets, and tension-leg floating substructures.…”

Section: Introductionmentioning

confidence: 99%

Deformation mechanisms for offshore monopile foundations accounting for cyclic mobility effects

Barari

Bagheri

Rouainia

et al. 2017

Soil Dynamics and Earthquake Engineering

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There has been a huge surge in the construction of marine facilities (e.g., wind turbines) in Europe, despite the many unknowns regarding their long-term performance. This paper presents a new framework for design strategy based on performance measures for cyclic horizontally loaded monopile foundations located in saturated and dry dense sand, by considering pile deformations and pore pressure accumulation effects. A three-dimensional finite element model was developed to investigate the behavior of large-diameter piles. The model accounts for nonlinear dynamic interactions in offshore platforms under harsh combined moment and horizontal environmental loads, with emphasis on the cyclic mobility of the surrounding cohesionless subsoil and associated shear.The maximum moment applied in the cyclic analyses is varied from 18% to 47% of the ultimate resistance. The considered data reflect behavior at the expected load amplitudes and cycle numbers during the service life of operation.For low numbers of load cycles (<1000 cycles), there were no differences between the power law and logarithmic approaches in terms of describing the accumulated deformations; however, for high numbers of cycles (<10,000 cycles), the logarithmic law was less suited to describe the accumulation response. Magnitude of cyclic loads was found to cause a linear increase in the accumulated rotation. The results from short-term and long-term dynamic response of monopiles indicate that few load cycles with higher load levels are the main concerns in accumulation of pile rotation rather than thousands of load cycles with low amplitudes.

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“…Due to the main features of high load capability Larsen et al, 2013;Liu et al, 2015;Zhu et al, 2011), self-float (Le et al, 2013) and nearly 20% lower cost than other types of foundations such as monopile and jacket-up, bucket foundation, as a novel foundation, has already been applied to offshore wind turbine. Additionally, to be a good alternative for conventional transportation and installation of offshore wind turbine, a dedicated vessel for bucket foundation is designed by evading the offshore assembly with the following stages: the onshore erection stage and the offshore integrated transportation and installation stages (see Fig.…”

Section: Introductionmentioning

confidence: 99%