The reliability analysis of multi-membered structural systems such as steel tubular offshore platforms has proved to be a challenging task, and one on which increasing interest is being focussed. The modelling of applied wave loading for such structures is reviewed herein, together with appropriate statistical models. For the structural analysis in reliability theory work, a single wave load system only has been most commonly considered. Real wave trains, however reach the various structural components at different times and this may have an effect on the sequence of most likely member failure. This can, in turn, affect the calculated probability of failure for the structure as a whole, as is demonstrated in the paper for a reasonably realistic but idealized offshore structure.
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