A New Fixed Offshore Wind Turbine Foundation and its in-situ Responses to Winds and Waves in East China Sea

摘要

We introduce a new fixed structure supporting offshore wind turbines, which is used in Donghai Bridge windfarm, East China Sea. It is a high-rise-pile-cap foundation. This foundation serves as an in-situ test model for a new type of structure to support offshore wind turbines. In order to monitor the behavior of the new structure, we installed stress/strain monitoring instruments on four steel piles and in the cap, and clinometers on the tower. In-situ measurements of wind speed and direction, stresses of the piles and the cap and inclination of the tower are obtained, based on which we analyzed the dependence of the stresses of the piles and the cap on winds and waves, and the variation of the tower inclination with winds. Particularly, we captured the behavior of the new structure in the case of typhoon Haikui.