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<p>Due to the simplicity of fabrication, transportation, and installation, monopiles are considered the most efficient foundation type to support Offshore Wind Turbines (OWTs). Because of the harsh environmental loadings affecting the OWTs, monopiles with large dimensions are required. This creates difficulties in the fabrication, transportation, and installation processes and hence minimizes the monopile advantages. Thus, an improvement of the monopile shape is required to facilitate these processes. In this regard, several studies focused on the development of Hybrid Monopiles (HMs) as efficient alternatives to Ordinary Monopiles (OMs). These studies have compared the behavior of HMs to highlight their efficiency with respect to the OMs. However, these studies performed arbitrary comparisons and did not follow a specific aspect in the comparison (e.g., same cost, behavior, etc.). Arbitrary comparisons could potentially result in an incorrect decision about the efficiency of these foundations. The essential objective of the present study is twofold (i) assessing the efficiency of HMs proposed in the literature compared to the OMs conserving the same steel volume for all compared foundation types and (ii) developing an innovative hybrid monopile shape that can enhance its behavior. The efficiency of the proposed hybrid monopile (PHM) with respect to the OMs and the HMs existing in literature was studied and analyzed. To achieve these objectives, an experimental 1&#xa0;g model is used. The experimental results have shown that the PHM is considerably efficient compared to the OMs and HMs found in the literature.</p>

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Experimental Study on Hybrid Monopile Performance in Sand Under Monotonic and Cyclic Lateral Loads

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • Ashraf Ahmed,
  • Manar Naser,
  • Kamal Hafez

摘要

Due to the simplicity of fabrication, transportation, and installation, monopiles are considered the most efficient foundation type to support Offshore Wind Turbines (OWTs). Because of the harsh environmental loadings affecting the OWTs, monopiles with large dimensions are required. This creates difficulties in the fabrication, transportation, and installation processes and hence minimizes the monopile advantages. Thus, an improvement of the monopile shape is required to facilitate these processes. In this regard, several studies focused on the development of Hybrid Monopiles (HMs) as efficient alternatives to Ordinary Monopiles (OMs). These studies have compared the behavior of HMs to highlight their efficiency with respect to the OMs. However, these studies performed arbitrary comparisons and did not follow a specific aspect in the comparison (e.g., same cost, behavior, etc.). Arbitrary comparisons could potentially result in an incorrect decision about the efficiency of these foundations. The essential objective of the present study is twofold (i) assessing the efficiency of HMs proposed in the literature compared to the OMs conserving the same steel volume for all compared foundation types and (ii) developing an innovative hybrid monopile shape that can enhance its behavior. The efficiency of the proposed hybrid monopile (PHM) with respect to the OMs and the HMs existing in literature was studied and analyzed. To achieve these objectives, an experimental 1 g model is used. The experimental results have shown that the PHM is considerably efficient compared to the OMs and HMs found in the literature.