Experimental Study on Torsion Resistance of Foundation Ring Land-Based Wind Power Expanded Foundation Scale Model

Abstract

In this paper, an experimental torsion resistance-loading system for wind power extended foundation scale models is taken as the research object, and four 1:3 scale model specimens of the foundation ring are tested. The transmission mechanism of torque load in the extended foundation was analyzed, and the proportion of each part bearing the torque load was calculated. Test results showed that when the torque load was small, the torque load transmitted from the upper part was mainly borne by the sidewall adhesion force, as well as the top radial reinforcement. In contrast, the torque load was gradually borne by the anchor flange of the foundation ring in the case of a large torque load. At the middle and late stages of torque loading, the top radial reinforcement of the foundation shared about 20% of the torque load, while the bottom flange of the foundation ring shared about 80%. The torque load is most sensitive to changes in the size of the bottom flange but not sensitive to those in the embedded depth of the foundation ring or in the strength of the foundation concrete.

Predicting the Displacement Variation of Rehabilitated Foundation of Onshore Wind Turbines Using Machine Learning Models

“…Given these challenges concerning wind turbine foundations, research on the mechanisms of foundation damage and rehabilitation techniques for damaged foundations has attracted growing attention from scholars. Guo et al [5] discovered that torque load is most sensitive to changes in bottom flange size but less responsive to variations in the buried depth of the foundation ring or the strength of the foundation concrete. Velarde et al [6] investigated the sensitivity of fatigue load for a 5 MW offshore wind turbine installed on a gravity base with respect to major structural, geotechnical, and marine parameters.…”