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Bearing Capacity Characteristics of Composite Bucket Foundation Under Torque Loading

Author

Listed:
  • Puyang Zhang

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

  • Yan’e Li

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

  • Yajun Lv

    (School of Architecture, North China University of Water Resources and Electric Power, Zhengzhou 450045, China)

  • Hongyan Ding

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

  • Conghuan Le

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
    State Key Laboratory of Coastal and Offshore Engineering, Dalian University of technology, Dalian 116023, China)

Abstract

The composite bucket foundation for offshore wind turbine bears the vertical load from not only the superstructure and the horizontal load, caused by wind and wave, but also from the torque load caused by rotating structures, such as blades. Based on layered soil foundation, the influence of the skirt height, the friction coefficient between soil and bucket foundation and the diameter of the bucket foundation on the stress of the bucket skirt under the torque load are studied in this paper. Moreover, the envelope curves of the bearing capacity of H–T and V–H–T are obtained by the fixed displacement ratio loading method. The bearing capacity characteristics of composite bucket foundation under different loading combinations are analyzed. The results show that: (1) The effect of inside soil on the bucket skirt is greater than that of the outside soil; (2) when composite loads are applied, the torque-bearing capacity decreases slowly with the increase of horizontal force, and when the horizontal force increases to a certain value, the value of the torque decreases significantly; and (3) the shape of the H–T failure envelope of the bucket foundation has no obvious change, vertical load have less effect on horizontal and torque load.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:13:p:2487-:d:243721
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    References listed on IDEAS

    as
    1. 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.
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    Cited by:

    1. Guo, Yaohua & Zhang, Puyang & Ding, Hongyan & Le, Conghuan, 2021. "Design and verification of the loading system and boundary conditions for wind turbine foundation model experiment," Renewable Energy, Elsevier, vol. 172(C), pages 16-33.
    2. Yangchun Han & Jiulong Cheng & Qiang Cui & Qianyun Dong & Wanting Song, 2020. "Uplift Bearing Capacity of Cone-Cylinder Foundation for Transmission Line in Frozen Soil Regions, Using Reduced-Scale Model Tests and Numerical Simulations," Energies, MDPI, vol. 13(8), pages 1-22, April.

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