@inproceedings{3431aca9828b4edf8674d928f1ab0f68,
title = "Relating the Stiffness of Load-Transfer Functions for Monopile Foundations to Elastic Soil Modulus",
abstract = "Estimating the stiffness of large diameter monopiles used to support offshore wind turbines is an important step in the design process. This is generally done using load-transfer functions in the form of independent (Winkler) springs to represent the relationship between the net soil resistance at any depth adjacent to a pile (p) and the lateral deflection of the pile at the same depth (y). Recent studies for monopiles, which have low length to diameter ratios and high moment loading, have led to recommendations for additional moment-rotational, or m-θ, springs distributed along the shaft of the monopile, as well as base lateral and rotational springs. A significant challenge in applying these new recommendations is to relate the load-transfer functions to conventional soil properties. A simple {\textquoteleft}Step 0′ design approach has derived relationships between the initial stiffness values of the load-transfer functions and the elastic modulus of the soil at a given depth. In this paper, the accuracy of these relationships is examined for a more complex, layered soil profile that includes realistic but abrupt changes in soil modulus. It shown that once a soil modulus profile is established, a reasonably accurate estimate of the stiffness of a monopile can be obtained, sufficient for initial design calculations, without the need for more onerous 3D FEA.",
keywords = "Design, lateral stiffness, load transfer, monopiles, offshore wind",
author = "James Doherty and Mark Randolph and Xiao Wan",
note = "Publisher Copyright: Copyright {\textcopyright} 2023 by ASME.; ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2023 ; Conference date: 11-06-2023 Through 16-06-2023",
year = "2023",
month = sep,
day = "22",
doi = "10.1115/OMAE2023-106589",
language = "English",
series = "Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE",
publisher = "ASME International",
booktitle = "ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering",
address = "United States",
}