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Feasibility study of a steel-UHPFRC hybrid tower for offshore wind turbines
In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258
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| Trefwoord |
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| Author keywords |
Offshore wind turbine; UHPFRC; Hybrid tower; Fatigue life prediction; Ultimate resistance |
| Auteurs | | Top |
- Chen, C.
- Shen, X.
- Zhou, Z.
- Hua, X.
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| Abstract |
A steel-ultra high performance fibre reinforced composites (steel-UHPFRC) hybrid tubular tower structure (>= 100m) is proposed and its feasibility to support an offshore wind turbine (OWT) with a 10 MW rotor is investigated in this paper. The hybrid tower combines a reinforced UHPFRC tube at the bottom and a steel tube at the top. Two numerical models are established to calculate the ultimate and fatigue loads for the hybrid tower and a standard steel tube tower as a reference. A simplified method is proposed to estimate the ultimate strength of the reinforced UHPFRC tube section, while a method based on the S-N curves is used to check its fatigue strength. It is found that the hybrid tower can satisfy design requirements and has a much longer fatigue life compared to the reference steel tower. Furthermore, the total material cost of the hybrid tower is found to be only 58% of that of the reference steel tower, while the masses of these two towers are kept close. |
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