期刊
MARINE GEORESOURCES & GEOTECHNOLOGY
卷 37, 期 1, 页码 1-13出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/1064119X.2018.1424971
关键词
Accumulative deformation; bucket foundation; cyclic loading; frequency domain analysis; hysteretic curve
资金
- National Natural Science Foundation of China [51679163, 51779171]
- Innovation Method Fund of China [2016IM030100]
- Tianjin Municipal Natural Science Foundation [17JCYBJC22000]
As an appropriate type of foundation for offshore wind turbines (OWTs), wide-shallow composite bucket foundation (WSCBF) is cost-competitive, and it has a unique and special substructure that comprises seven internal rooms arranged in a honeycomb-like structure. In this study, the cyclic behavior of WSCBF for OWTs embedded in saturated clay was investigated using a large-scale model subjected to lateral cyclic loading. The responses of foundation under constant- and various-amplitude cyclic loadings were recorded in terms of displacements, rotations, and bending moments. The variations in stiffness and damping were obtained, and a collaborative bearing mechanical model between the bucket and soil was considered, which was beneficial for improving the stiffness of the whole structure. Accumulative deformation was found to have little effect on the bearing capacity of the foundation. Dynamic analysis in frequency domain was further performed on both moment and rotation data, and the complex, frequency-dependent impedance was also studied.
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