Experimental Development of the Relationship for Large-Diameter Offshore Monopiles in Sands: Centrifuge Tests
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 1
Abstract
The validity of using the existing numerical methods [American Petroleum Institute (API) and Reese methods] for the design of offshore wind turbines’ large-diameter monopiles in sands is questionable, as many researchers have raised concerns related to the diameter effects in models. This study presents the development of experimental relationships for large-diameter monopiles in dense sands based on results from centrifuge tests exhibiting a softer monopile behavior than those proposed by the API and Reese methods. The effect of socketing the tip of a pile in rock bearing layers was also investigated. The initial gradients of the relationships in dense sand layers were shown to become significantly stiffer as the depth reaches the much stiffer and stronger rock-bearing layer. The lateral load-displacement curves obtained based on the developed experimental relationships were found to be well matched with the measured lateral load-displacement curves; therefore, it was concluded that the developed experimental relationships reasonably predict the lateral responses of large-diameter monopiles.
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Acknowledgments
This work was supported by the Incheon National University Research in 2014.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 7, 2014
Accepted: May 28, 2015
Published online: Jul 10, 2015
Discussion open until: Dec 10, 2015
Published in print: Jan 1, 2016
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