Extreme value predictions and critical wave episodes for marine structures by FORM

The aim of the present article is to advocate for a very effective stochastic procedure, based on the First Order Reliability Method (FORM), for extreme value predictions related to wave-induced loads. Three different applications are illustrated. The first deals with a jack-up rig where second-order stochastic waves are included in the analysis. The second application is parametric roll motions of ships. Finally, the motion of a TLP floating foundation for an offshore wind turbine is analysed taking into account large motions.