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A Discrete Element Method Centrifuge Model of Monopile under Cyclic Lateral Loads

Duan, N; Cheng, YP; (2016) A Discrete Element Method Centrifuge Model of Monopile under Cyclic Lateral Loads. International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering , 10 (2) pp. 189-194. Green open access

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Abstract

This paper presents the data of a series of two-dimensional Discrete Element Method (DEM) simulations of a large-diameter rigid monopile subjected to cyclic loading under a high gravitational force. At present, monopile foundations are widely used to support the tall and heavy wind turbines, which are also subjected to significant from wind and wave actions. A safe design must address issues such as rotations and changes in soil stiffness subject to these loadings conditions. Design guidance on the issue is limited, so are the availability of laboratory and field test data. The interpretation of these results in sand, such as the relation between loading and displacement, relies mainly on empirical correlations to pile properties. Regarding numerical models, most data from Finite Element Method (FEM) can be found. They are not comprehensive, and most of the FEM results are sensitive to input parameters. The micro scale behaviour could change the mechanism of the soil-structure interaction. A DEM model was used in this paper to study the cyclic lateral loads behaviour. A non-dimensional framework is presented and applied to interpret the simulation results. The DEM data compares well with various set of published experimental centrifuge model test data in terms of lateral deflection. The accumulated permanent pile lateral displacements induced by the cyclic lateral loads were found to be dependent on the characteristics of the applied cyclic load, such as the extent of the loading magnitudes and directions.

Type: Article
Title: A Discrete Element Method Centrifuge Model of Monopile under Cyclic Lateral Loads
Open access status: An open access version is available from UCL Discovery
Publisher version: http://www.waset.org/
Language: English
Additional information: Waset (World Academy of Science, Engineering and Technology) states all manuscripts submitted to World Academy of Science, Engineering and Technology are assumed to be submitted under the open access publishing model without any article processing and publication charges. Meaning the open access publishing model, papers are peer-reviewed in the normal way under scientific editorial control. When a paper is accepted for publication, published paper appears electronically and is freely available from website at no cost. Authors may also use their published .pdf's for any non-commercial use on their personal or non-commercial institution's website. In addition to this, they apply the Creative Commons Attribution (CC BY) license to works we publish. Under this license, authors agree to make articles legally available for reuse, without permission or fees, for virtually any purpose. Anyone may copy, distribute, or reuse these articles, as long as the author and original source are properly cited.
Keywords: Cyclic Loading, Discrete Element Method, Numerical modelling, sands
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1475138
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