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Design Optimization of Conical Concrete Support Structure for Offshore Wind Turbine

Author

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  • Hyun-Gi Kim

    (Department of Energy Plant Engineering, Catholic Kwandong University, Gangnung 25601, Korea)

  • Bum-Joon Kim

    (Department of Civil and Environmental System Engineering, Konkuk University, Seoul 05029, Korea)

Abstract

Various types of support structures for offshore wind turbine have been developed, and concrete structures have attracted attention due to many advantages. Although many studies have been conducted on the design of the existing steel structures, information and research on the design of concrete support structures are insufficient. Therefore, in this paper, a structural analysis model of conical concrete support structure (CCSS) is established and design optimization is presented. A detailed performance evaluation and the design of prestressed concrete were performed under the marine conditions of Phase 1 test site of southwest offshore wind project in Korea. The fluid–soil–structure interaction (FSI) was applied using the added mass method and soil spring model to represent the effects of water and soil. With the result of quasi-static analysis, a post-tensioning design was implemented by applying prestressing steel, and CCSS showed sufficient rigidity. From the natural frequency analysis, CCSS has a dynamic structural stability, and, in response spectrum and time-history analyses, the CCSS was safe enough under the earthquake loads. The methods and conclusions of this study can provide a theoretical reference for the structural analysis and design of concrete support structures for offshore wind turbines.

Suggested Citation

  • Hyun-Gi Kim & Bum-Joon Kim, 2020. "Design Optimization of Conical Concrete Support Structure for Offshore Wind Turbine," Energies, MDPI, vol. 13(18), pages 1-21, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4876-:d:415086
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    References listed on IDEAS

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    1. Yue Zhao & Jijian Lian & Chong Lian & Xiaofeng Dong & Haijun Wang & Chunxi Liu & Qi Jiang & Pengwen Wang, 2019. "Stochastic Dynamic Analysis of an Offshore Wind Turbine Structure by the Path Integration Method," Energies, MDPI, vol. 12(16), pages 1-18, August.
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    Cited by:

    1. Weimin Chen & Shuangxi Guo & Yilun Li & Yijun Shen, 2021. "Impacts of Mooring-Lines Hysteresis on Dynamic Response of Spar Floating Wind Turbine," Energies, MDPI, vol. 14(8), pages 1-13, April.
    2. Grzegorz Ludwik Golewski, 2021. "The Beneficial Effect of the Addition of Fly Ash on Reduction of the Size of Microcracks in the ITZ of Concrete Composites under Dynamic Loading," Energies, MDPI, vol. 14(3), pages 1-14, January.

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