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Numerical analysis of lateral – Moment capacity of bucket foundations for offshore wind turbine in sand
journal contributionposted on 2023-06-14, 03:29 authored by L Cheng, Shah Neyamat UllahShah Neyamat Ullah, Y Hu, M Zhou, W Jiang
This paper reports the lateral – moment bearing capacity of bucket foundations under lateral loading in sand. The Modified Mohr-Coulomb (MMC) model is adopted to capture the hardening – softening behaviour in medium dense and dense sands within a finite element (FE) modelling framework. The FE model performance is assessed against available field test data as well as analytical solutions showing a relatively good agreement. A series of parametric study is conducted to investigate the effects of bucket aspect ratio, bucket diameter, load eccentricity, vertical load and relative density of sand on the lateral - moment bearing capacity of the bucket. Comparisons are drawn between the conventional Mohr-Coulomb (MC) model and the stress dependent MMC model highlighting the role of sand dilatancy in mobilising the lateral moment capacity. Based on the FE results, a simple stepwise calculation framework is proposed for two scenarios: (i) to predict the lateral - moment bearing capacity of the bucket if the bucket dimensions are known, and (ii) to design the bucket dimensions for a known required bucket capacity.
Number of Pages21
External Author AffiliationsSouth China University of Technology; South China Institute of Geotechnical Engineering; University of Western Australia