The application of piles as foundations for offshore wind turbines yields new requirements for the design. Wind and waves induce a cyclic lateral loading on the pile which changes direction corresponding to the meteorological conditions. Cyclic lateral loading on piles results in accumulated displacements, depending on the cyclic load level and load characteristics. The deformation can increase significantly due to a varying loading direction. Under such loading conditions the pile can drift sideways even if the loading is symmetric. Wings attached to the pile shortly below the seabed have been known to reduce deformations on laterally loaded piles as they locally enlarge the diameter on which the soil resistance is activated. They also change the cross-section of the pile from a circular shape to a star-shape. This might reduce the drifting of the pile. A series of large-scale in-situ tests has been carried out in order to identify the effects of changing loading direction as well as the applicability of winged piles to reduce deformations. Two tubular steel piles (one of them equipped with wings) have been installed and subjected to high-cyclic lateral loading from varying directions. In this paper the in-situ tests and their results are presented.
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ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
June 9–14, 2013
Nantes, France
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5540-9
PROCEEDINGS PAPER
Laterally Loaded Piles With Wings: In Situ Testing With Cyclic Loading From Varying Directions
Christina Rudolph,
Christina Rudolph
Hamburg University of Technology, Hamburg, Germany
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Jürgen Grabe
Jürgen Grabe
Hamburg University of Technology, Hamburg, Germany
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Christina Rudolph
Hamburg University of Technology, Hamburg, Germany
Jürgen Grabe
Hamburg University of Technology, Hamburg, Germany
Paper No:
OMAE2013-10026, V006T10A002; 7 pages
Published Online:
November 26, 2013
Citation
Rudolph, C, & Grabe, J. "Laterally Loaded Piles With Wings: In Situ Testing With Cyclic Loading From Varying Directions." Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. Volume 6: Polar and Arctic Sciences and Technology; Offshore Geotechnics; Petroleum Technology Symposium. Nantes, France. June 9–14, 2013. V006T10A002. ASME. https://doi.org/10.1115/OMAE2013-10026
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