Print Email Facebook Twitter Impact of scour on lateral resistance of wind turbine monopiles Title Impact of scour on lateral resistance of wind turbine monopiles: An experimental study Author Li, Q. (TU Delft Geo-engineering) Askarinejad, A. (TU Delft Geo-engineering) Gavin, Kenneth (TU Delft Geo-engineering) Date 2021 Abstract The majority of offshore wind structures are supported on large-diameter, rigid monopile foundations. These piles may be subjected to scour due to the waves and currents that causes a loss of soil support and consequently decreases the pile capacity and system stiffness. The results of numerical models suggest that the shape of the scour hole affects the magnitude of pile capacity loss; however, there is a dearth of experimental test data that quantify this effect. This paper presents a series of centrifuge model tests on an instrumented model pile that investigates the effects of scour-hole geometry on the response of a laterally loaded pile embedded in sand. The pile instrumentation allowed load–displacement and p–y (soil reaction – displacement) curves to be derived. Three scour geometries (global, local wide, and local narrow) and three scour depths (1D, 1.5D, and 2D; where D is pile diameter) were modelled. For all three scour types, pile moment capacity decreased almost linearly with increase of scour depth. Simple empirical relations were proposed to evaluate the detrimental influence of scour on the pile moment capacity. A new method has been developed to allow designers to quantify the effect of scour-hole shape and severity of scour on the pile response. Subject Centrifuge modellingMoment capacityOffshore wind monopilesP–y curvesScourScour-hole shapes To reference this document use: http://resolver.tudelft.nl/uuid:258d47a7-1b62-49c8-acc2-05e0faa46fc0 DOI https://doi.org/10.1139/cgj-2020-0219 Embargo date 2021-06-07 ISSN 0008-3674 Source Canadian Geotechnical Journal, 58 (11), 1770-1782 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 Q. Li, A. Askarinejad, Kenneth Gavin Files PDF cgj_2020_0219.pdf 6.94 MB Close viewer /islandora/object/uuid%3A258d47a7-1b62-49c8-acc2-05e0faa46fc0/datastream/OBJ/view