Design of Large-Scale Prestressing Bucket Foundation for Offshore Wind Turbines

• Published in: Transactions of Tianjin University Vol. 18; no. 2; pp. 79 - 84
• Main Author: 练继建 丁红岩 张浦阳 于瑞
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 01.04.2012; School of Civil Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China%School of Civil Engineering, Tianjin University, Tianjin 300072, China; State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin 300072, China%School of Civil Engineering, Tianjin University, Tianjin 300072, China; State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin 300072, China
• Subjects: Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Science; 主拉应力; 桶形基础; 海上; 设计; 过渡结构; 预应力钢绞线; 风力发电机组; 风力涡轮机; offshore wind power; large-scale prestressing bucket foundation; arc transition; structural design
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-012-1661-5

The key in the force transmission between the tower and the foundation for offshore wind turbines is to transfer the large moment and horizontal loads. The finite element model of a large-scale prestressing bucket founda- tion for offshore wind turbines is set up and the structural characteristics of the arc transition structure of the founda- tion are analyzed for 40--60 channels （20--30 rows） arranged with prestressing steel strand under the same ultimate load and boundary conditions. The mechanical characteristics of the key parts of the foundation structures are illus- trated by the peak of the principal tensile stress, the peak of the principal compressive stress and the distribution areas where the principal tensile stress is larger than 2.00 MPa. It can be concluded that the maximum principal tensile stress of the arc transition decreases with the increasing number of channels, and the amplitude does not change signifi- cantly; the maximum principal compressive stress increases with the increasing number of channels and the amplitude changes significantly; however, for the distribution areas where the principal tensile stress is larger than 2.00 MPa, with different channel numbers, the phenomenon is not obvious. Furthermore, the principal tensile stress at the top of the foundation beams fluctuantly increases with the increasing number of channels and for the top cover of the bucket, the principal tensile stress decreases with the increasing number of channels.