Structural Analysis and Design Method of Hybrid FRP-concrete-steel Prestressed Double-skin Wind Turbine Towers

Tao QI , Ran DENG , Yu XIANG , Rong-fu LI , Wei-dong JI , Xiu-wen WANG , Tao YU

Science Technology and Engineering ›› 2025, Vol. 25 ›› Issue (7) : 2886 -2896.

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Science Technology and Engineering ›› 2025, Vol. 25 ›› Issue (7) : 2886-2896 DOI: 10.12404/j.issn.1671-1815.2309727
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Structural Analysis and Design Method of Hybrid FRP-concrete-steel Prestressed Double-skin Wind Turbine Towers
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Abstract

China's offshore wind power sector is rapidly progressing with large-scale and efficient projects. To support large-capacity wind turbines, there is an increasing need for advanced tower structures that offer superior structural performance and economic efficiency. One such innovative solution is the hybrid fiber-reinforced composite materials (FRP)-concrete-steel prestressed double-skin wind turbine towers (PDSWTs) proposed by scholars at The Hong Kong Polytechnic University. PDSWTs boast excellent durability, high load-bearing capacity, and exceptional stability, resulting in the potential to reduce production and maintenance costs throughout the service life. A study on the analysis and design procedures of PDSWTs was presented using a tower that supports 12 MW offshore wind turbine as an example, based on the provisions in current design standards and finite element modelling. The results demonstrate that: the tower successfully meets the frequency requirements of wind turbine; the tower possesses high ultimate resistance under compression-bending, shear and torsional loadings of ultimate limit states; the strain, stress, crack width and tower deformation under serviceability limit states meet the requirements of current design standards; furthermore, a simplified method is proposed to check the fatigue resistance of steel and concrete in the tower sections. The result is expected to provide references for the design and application of PDSWTs.

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Offshore wind energy / tower / FRP / structural design

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Tao QI, Ran DENG, Yu XIANG, Rong-fu LI, Wei-dong JI, Xiu-wen WANG, Tao YU. Structural Analysis and Design Method of Hybrid FRP-concrete-steel Prestressed Double-skin Wind Turbine Towers. Science Technology and Engineering, 2025, 25(7): 2886-2896 DOI:10.12404/j.issn.1671-1815.2309727

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