Dynamic effects of wave loads in analysis to check strength and fatigue for fixed steel Jacket structure

Abstract

The problems of analyses to check strength (ULS) and fatigue (FLS) are two paramount in the steps of designing the structure of the Fixed Steel Jacket structure. Currently, based on the principle of dynamic effects of wave loads are evaluated when the natural period of the structure −Tmax closes to the period of wave, the current standards (API, DNV, ISO, ABS, PTS,…) base on the natural period of structure −Tmax that provisions allowing the analysis by the Quasi-Static method or the Dynamic method. This article analyses and performs evaluating the dynamic effects of wave loads through analyses the structure of the Fixed Steel Jacket structure by the Quasi-Static method and Dynamic method in Ultimate Limit State and Fatigue Limit State for the Vietnamese continental shelf condition.