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Energies 2017, 10(7), 1041; https://doi.org/10.3390/en10071041

Study on the Bearing Mode and Force Transfer Path of Composite Bucket Foundations

1
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
2
School of Civil Engineering, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
Academic Editor: Lance Manuel
Received: 13 June 2017 / Revised: 3 July 2017 / Accepted: 18 July 2017 / Published: 20 July 2017
(This article belongs to the Section Energy Sources)
Full-Text   |   PDF [5375 KB, uploaded 20 July 2017]   |  

Abstract

This paper elaborates on a new composite bucket foundation (CBF) structural system for offshore wind turbines. The proposed CBF consists of a special force transition section, a beam system structure upper steel bucket cover and a large-scale steel bucket with honeycomb structure rooms. It can be prefabricated onshore, self-floated on the sea and then towed to the appointed sea area before sinking to the sea soil under negative pressure. This is called the “one-step” installation technology. Arc- and line-type bucket foundations are calculated by both theory and the finite element method to discuss their force transfer paths and bearing modes. Owning to the special structural form, the transition section can effectively convert the huge load and bending moment into controllable tension and compressive stress, as well as adjust the structure balance. The bearing model and percentage of each part of the composite foundation under monotonous and ultimate load conditions are also calculated. Results indicate that the bearing mode of CBF is a typical top cover mode. In addition, the curvature impact of arc-type is studied and the results reveal that the structure type of the transition section is more important than the diameter ratio between the bottom transition section and the bucket. View Full-Text
Keywords: wind energy; composite bucket foundation; transfer segment; load transfer characteristic; bearing mechanism wind energy; composite bucket foundation; transfer segment; load transfer characteristic; bearing mechanism
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He, S.; Zhang, P.; Ding, H. Study on the Bearing Mode and Force Transfer Path of Composite Bucket Foundations. Energies 2017, 10, 1041.

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