Large Scale Experimental Study of the Scour Protection Damage Around a Monopile Foundation Under Combined Wave and Current Conditions

Wu, Minghao; Vos, Leen De; Chavez, Carlos Emilio Arboleda; Stratigaki, Vicky; Fazeres-Ferradosa, Tiago; Rosa-Santos, Paulo; Taveira-Pinto, Francisco; Troch, Peter

doi:10.3390/jmse8060417

Cited by 25 publications

(11 citation statements)

References 35 publications

(83 reference statements)

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“…Two test groups, TG1 and TG2, are applied in the study. The target conditions of the two test groups are, respectively, scaled down from the selected large scale test cases, Test 10B and Test 13B, from the PROTEUS (Protection of offshore wind turbine monopiles against scouring) project testing campaign performed in the Fast Flow Facility in HRWallingford [20,22]. Firstly, the measurement effects are quantified by performing repeated measurements of the same damage profile of the armour layer.…”

Section: Descriptionmentioning

confidence: 99%

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Quantification of Measurement and Model Effects in Monopile Foundation Scour Protection Experiments

Vos

Chavez

et al. 2021

JMSE

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The present work introduces an analysis of the measurement and model effects that exist in monopile scour protection experiments with repeated small scale tests. The damage erosion is calculated using the three dimensional global damage number S3D and subarea damage number S3D,i. Results show that the standard deviation of the global damage number σ(S3D)=0.257 and is approximately 20% of the mean S3D, and the standard deviation of the subarea damage number σ(S3D,i)=0.42 which can be up to 33% of the mean S3D. The irreproducible maximum wave height, chaotic flow field and non-repeatable armour layer construction are regarded as the main reasons for the occurrence of strong model effects. The measurement effects are limited to σ(S3D)=0.039 and σ(S3D,i)=0.083, which are minor compared to the model effects.

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Section: Descriptionmentioning

confidence: 99%

“…De Vos et al (2001,2002) [15,16] propose empirical formulas to estimate the erosion of the scour protection layer from both static and dynamic perspectives via a 1:50 laboratory scale model test. Other relevant works are seen in [17][18][19][20][21][22]. Failure modes (2) and (3) are addressed in [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Quantification of Measurement and Model Effects in Monopile Foundation Scour Protection Experiments

Vos

Chavez

et al. 2021

JMSE

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“…The size, thickness, and extent of the rock scour protection are designed considering the following failure mechanisms [10]: (1) shear failure (external stability), ( 2) winnowing (internal stability [11]), and (3) edge scour. The stability of the rock scour protection is usually evaluated by means of a set of physical experiments at a reduced scale (i.e., [12] or [13]).…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Dynamic Rock Scour Protection in Morphodynamic Environments for Offshore Wind Jackets

et al. 2021

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Bottom-fixed offshore wind turbines are generally built on continental-shelf sections that are morphodynamically active due to their shallow depths and severe wave and current conditions. Such sites are commonly protected against scour to prevent the loss of structural stability. Scour protection can be designed using static or dynamic solutions. Designing dynamic protection requires experimental validation, especially for singular or unconventional structures. This article presents an experimental method for the laboratory analysis of scour protection for jacket foundations placed at morphodynamically active sites. The test campaign was conducted within the project East Anglia ONE (UK) as part of the asset owner studies and aimed to evaluate operation and maintenance (O&M) aspects, independent of the contractor’s original design assessments. The physical experiments explored morphodynamic changes on the sea bottom and their importance to scour protection, as well as the importance of the history of the wave loads to the deformation of the rock scour protection. This was explored by repeating different cumulative tests, including a succession of randomly ordered sea states (Return Period (RP) 1-10-20-50 years). The experimental results show that the deformation of the rock sour protection was the greatest when the most energetic sea states occurred at the beginning of the experimental test campaign. The maximum deformation was at 5D50 when the first test was also the most energetic, while it was at 3D50 when not included as the first test, yielding a 40% reduction in the scour protection deformation.

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“…Taveira-Pinto et al [15] integrated management and planning of CPLP's coastal zones. Wu et al [16] presented a series of large-scale wave flume experiments on the scour protection damage around a monopile under combined waves and current conditions with model scales of 1:16.67 and 1:8.33.…”

Section: Introductionmentioning

confidence: 99%

A Predictive Model for Estimating Damage from Wind Waves during Coastal Storms

Choo

Chun

Jeon

et al. 2021

Water

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In recent years, climate abnormalities have been observed globally. Consequently, the scale and size of natural disasters, such as typhoons, wind wave, heavy snow, downpours, and storms, have increased. However, compared to other disasters, predicting the timing, location and severity of damages associated with typhoons and other extreme wind wave events is difficult. Accurately predicting the damage extent can reduce the damage scale by facilitating a speedy response. Therefore, in this study, a model to estimate the cost of damages associated with wind waves and their impacts during coastal storms was developed for the Republic of Korea. The history of wind wave and typhoon damages for coastal areas in Korea was collected from the disaster annual report (1991–2020), and the damage cost was converted such that it reflected the inflation rate as in 2020. Furthermore, data on ocean meteorological factors were collected for the events of wind wave and typhoon damages. Using logistic and linear regression, a wind wave damage prediction model reflecting the coastal regional characteristics based on 74 regions nationwide was developed. This prediction model enabled damage forecasting and can be utilized for improving the law and policy in disaster management.

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Large Scale Experimental Study of the Scour Protection Damage Around a Monopile Foundation Under Combined Wave and Current Conditions

Cited by 25 publications

References 35 publications

Quantification of Measurement and Model Effects in Monopile Foundation Scour Protection Experiments

Quantification of Measurement and Model Effects in Monopile Foundation Scour Protection Experiments

Experimental Evaluation of Dynamic Rock Scour Protection in Morphodynamic Environments for Offshore Wind Jackets

A Predictive Model for Estimating Damage from Wind Waves during Coastal Storms

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