Print Email Facebook Twitter Influence of Pile Diameter and Aspect Ratio on the Lateral Response of Monopiles in Sand with Different Relative Densities Title Influence of Pile Diameter and Aspect Ratio on the Lateral Response of Monopiles in Sand with Different Relative Densities Author Wang, H. (TU Delft Geo-engineering; Zhejiang University) Wang, Lizhong (Zhejiang University; Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province) Hong, Yi (Zhejiang University; Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province) Askarinejad, A. (TU Delft Geo-engineering) He, Ben (Power China Huadong Engineering Corporation Limited) Pan, Hualin (Zhejiang Province Energy Group Company Ltd) Date 2021 Abstract The large-diameter monopiles are the most preferred foundation used in offshore wind farms. However, the influence of pile diameter and aspect ratio on the lateral bearing behavior of monopiles in sand with different relative densities has not been systematically studied. This study presents a series of well-calibrated finite-element (FE) analyses using an advanced state dependent constitutive model. The FE model was first validated against the centrifuge tests on the large-diameter monopiles. Parametric studies were performed on rigid piles with different diameters (D = 4–10 m) and aspect ratios (L/D = 3–7.5) under a wide range of loading heights (e = 5–100 m) in sands with different relative densities (Dr = 40%, 65%, 80%). The API and PISA p-y models were systematically compared and evaluated against the FE simulation results. The numerical results revealed a rigid rotation failure mechanism of the rigid pile, which is independent of pile diameter and aspect ratio. The computed soil pressure coefficient (K = p/Dσ′ v) of different diameter piles at same rotation is a function of z/L (z is depth) rather than z/D. The force–moment diagrams at different deflections were quantified in sands of different relative density. Based on the observed pile–soil interaction mechanism, a simple design model was proposed to calculate the combined capacity of rigid piles. Subject 3D finite element analysisCombined capacityHypoplasticLarge diameterMonopileRigidSand To reference this document use: http://resolver.tudelft.nl/uuid:f420191f-52e0-4d7c-afc3-9d0f164319aa DOI https://doi.org/10.3390/jmse9060618 ISSN 2077-1312 Source Journal of Marine Science and Engineering, 9 (6), 1-22 Part of collection Institutional Repository Document type journal article Rights © 2021 H. Wang, Lizhong Wang, Yi Hong, A. Askarinejad, Ben He, Hualin Pan Files PDF jmse_09_00618_v2.pdf 7.04 MB Close viewer /islandora/object/uuid:f420191f-52e0-4d7c-afc3-9d0f164319aa/datastream/OBJ/view