The robustness of the cathodic protection systems utilized for offshore wind monopile foundations depends on surface condition steel as well environmental conditions. This study investigated how preexisting biofouling and corrosion products vertical uncoated surfaces extending from intertidal zone to buried affected requirements when impressed current (ICCP) was applied under tidal comparative ...

The monopile foundations of offshore wind turbines in shallow waters are susceptible to be affected by tidal scour, which takes away the sand and soil around monopiles poses a serious threat safety turbines. To mitigate this issue, much effort has been made previously. However, all existing protective measures do not have added value other than scouring mitigation. In view this, new scour mitig...

Physical model tests were conducted to verify the stability of a conceptual scour protection design placed around monopiles in varying water depth and under combined wave current load. The performed 3D wave-current basin at Ludwig-Franzius-Institute, Leibniz University Hannover scale 1:35. As unique boundary condition compared previous studies, monopile was below mobile sand bed. Before waves c...

A simplified methodology is proposed for calculating the plastic collapse (limit) bending moment load of a pipe with circumferential flaw an emphasis on its application use in assessment cracked offshore wind turbine monopile using failure diagrams. The based theory net section (NSC) but differs from existing approaches that it does not need idealisation and categorisation crack before assessme...

Monopile foundations contain welding residual stresses and are widely used in industry to support offshore wind turbines (OWTs). The monopiles subjected hammering loads during installation cyclic operation, therefore the influence of stress redistribution as a result fatigue cycles must be evaluated these structures. existing empirical models predict presence loading conditions strongly depende...