| Compared with onshore wind power, offshore wind power has a broader development prospect, while the existing offshore wind power foundation still exists the imbalance between the bearing capacity and construction cost. For this reason, based on the existing gravity foundation and tripod foundation, this paper proposes a new framed gravity structure, the gravity tripod. This foundation solves the shortcomings of traditional gravity foundation which requires large consumption of concrete and large cost of foundation preparation, and simplifies the complex construction and building process of the tripod bucket foundation while retaining the advantage of relying on overall structural stiffness to resist overturning loading. FE analysis are carried out using the commercial software Abaqus to simulate the evolution of the failure mechanism of this foundation in homogeneous and inhomogeneous clay under vertical, horizontal and moment loading, focusing on the contribution of the frame structure to enhance the anti-overturning capacity, and based on the existing research results on the uniaxial bearing capacity of circular surface foundations and tripod bucket foundations, a simplified method for the uniaxial undrained bearing capacity of the gravity tripod foundation is proposed, which provides theoretical support and technical basis for its wide application. In addition, the gravity tripod founadtion is extended from a planar foundation to a bucket-shaped foundation with skirts, and the influence of burial depth on bearing capacity is comparatively analyzed, which opens up new possibilities for its input into engineering practice. |
