This paper reports on a measurement campaign in which the magnetomechanical response of steel monopile is recorded during installation with hydraulic impact hammer. By comparing impact-induced changes magnetic stray field structure to measured strain, this effect analysed for first time under dynamic loading conditions such large scale. It shown that displays an excellent correspondence strain ...

In this paper, the procedure for flaw acceptability assessment is examined through a case study of semi-elliptical surface crack in an offshore monopile as it grows till forms thickness crack. Using prescribed industrial standard (BS 7910), fracture ratio, Kr shown to increase monotonically with increasing depth. The load Lr, initially insensitive However, there rapid Lr when depth ratio exceed...

A monopile is the most conventional structure foundation for offshore wind turbines (OWTs) in world. However, Korean industry has mostly been using jacket type of foundation. The main reason current situation Korea that marine soil consists weak layers sand and clay. Thus, depth to be deep enough satisfy intended serviceability design requirement rotation limit at seabed; a concept alone might ...

The paper provides a critical appraisal of the events surrounding the unexpected settlement of large-diameter monopile foundations for offshore wind energy converters, and will detail experimentation that is to be undertaken to determine the extent of the wear failure mode in such structures. The potential for wear deterioration at the grout-steel interface has been caused by the lack of axial ...