Consequences of p-y Curve Selection for Monopile Design for Offshore Wind Turbines

Sørensen, Sph; Augustesen, AH; Leth, CT; Østergaard, MU; Møller, Mathias

doi:10.3723/osig17.1062

Cited by 2 publications

(2 citation statements)

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“…Tests were performed on sandblasted mild steel piles with properties summarized in Table 2. The small L=D ratio is representative of modern full-scale monopiles (Sørensen et al 2017;Schroeder et al 2015), whereas the large h=D ratio is expected to be representative of operational loading conditions (Richards 2019) and ensures a rotation-dominated response. The surface is classified as smooth on the basis of the normalized roughness R n (e.g., Hu and Pu 2004), in contrast to typically rough full-scale monopiles.…”

Section: Model Pile Loading and Instrumentationmentioning

confidence: 99%

“…Given that monopiles may be up to 8 m in diameter (Sørensen et al 2017), with the latest designs being even larger, it is neither practical nor economic to test monopiles at full scale. However, physical modeling-at 1g in the centrifuge and at large (but reduced) scale in the field-has been used extensively to explore the response of a monopile.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Stress Level on Response of Model Monopile to Cyclic Lateral Loading in Sand

Richards

Bransby

Byrne

et al. 2021

J. Geotech. Geoenviron. Eng.

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Section: Model Pile Loading and Instrumentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Stress Level on Response of Model Monopile to Cyclic Lateral Loading in Sand

Richards

Bransby

Byrne

et al. 2021

J. Geotech. Geoenviron. Eng.

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Monopile rotation under complex cyclic lateral loading in sand

2020

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Monopiles supporting offshore wind turbines experience combined moment and horizontal loading which is both cyclic and complex – continuously varying in amplitude, direction and frequency. The accumulation of rotation with cyclic loading (ratcheting) is a key concern for monopile designers and has been explored in previous experimental studies, where constant-amplitude cyclic tests have shown rotation to accumulate as a power-law with cycle number. This paper presents results from laboratory tests in dry sand, which explore the rotation response to constant and variable amplitude, unidirectional and multidirectional cyclic loading. The tests are designed to inform model development and provide insight into key issues relevant to monopile design. Unidirectional tests show behaviour consistent with previous studies and provide a basis for interpreting more complex tests; multidirectional tests provide new insight into the monopile response to multidirectional cyclic loading; and multi-amplitude storm tests highlight salient features of the response to realistic loading. Tests are conducted in both very loose and dense sand, where the behaviour is found to be qualitatively similar.

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Consequences of p-y Curve Selection for Monopile Design for Offshore Wind Turbines

Cited by 2 publications

References 0 publications

Effect of Stress Level on Response of Model Monopile to Cyclic Lateral Loading in Sand

Effect of Stress Level on Response of Model Monopile to Cyclic Lateral Loading in Sand

Monopile rotation under complex cyclic lateral loading in sand

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