Design Optimization of Conical Concrete Support Structure for Offshore Wind Turbine

Hyun-Gi Kim and Bum-Joon Kim
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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

Energies, 2020, vol. 13, issue 18, 1-21

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.

Keywords: conical concrete support structure (CCSS); offshore wind turbine; fluid–soil–structure interaction (FSI); seismic analysis; prestressed concrete design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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