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Study on the Bearing Mode and Force Transfer Path of Composite Bucket Foundations

Author

Listed:
  • Shaohua He

    (School of Civil Engineering, Tianjin University, Tianjin 300072, China)

  • Puyang Zhang

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
    School of Civil Engineering, Tianjin University, Tianjin 300072, China)

  • Hongyan Ding

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
    School of Civil Engineering, Tianjin University, Tianjin 300072, China)

Abstract

This paper elaborates on a new composite bucket foundation (CBF) structural system for offshore wind turbines. The proposed CBF consists of a special force transition section, a beam system structure upper steel bucket cover and a large-scale steel bucket with honeycomb structure rooms. It can be prefabricated onshore, self-floated on the sea and then towed to the appointed sea area before sinking to the sea soil under negative pressure. This is called the “one-step” installation technology. Arc- and line-type bucket foundations are calculated by both theory and the finite element method to discuss their force transfer paths and bearing modes. Owning to the special structural form, the transition section can effectively convert the huge load and bending moment into controllable tension and compressive stress, as well as adjust the structure balance. The bearing model and percentage of each part of the composite foundation under monotonous and ultimate load conditions are also calculated. Results indicate that the bearing mode of CBF is a typical top cover mode. In addition, the curvature impact of arc-type is studied and the results reveal that the structure type of the transition section is more important than the diameter ratio between the bottom transition section and the bucket.

Suggested Citation

  • Shaohua He & Puyang Zhang & Hongyan Ding, 2017. "Study on the Bearing Mode and Force Transfer Path of Composite Bucket Foundations," Energies, MDPI, vol. 10(7), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:1041-:d:105374
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    Citations

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    Cited by:

    1. Hongyan Ding & Zuntao Feng & Puyang Zhang & Conghuan Le & Yaohua Guo, 2020. "Floating Performance of a Composite Bucket Foundation with an Offshore Wind Tower during Transportation," Energies, MDPI, vol. 13(4), pages 1-19, February.
    2. Puyang Zhang & Yan’e Li & Yajun Lv & Hongyan Ding & Conghuan Le, 2019. "Bearing Capacity Characteristics of Composite Bucket Foundation Under Torque Loading," Energies, MDPI, vol. 12(13), pages 1-17, June.

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