The fatigue limit state is the governing limit state for the structural dimensions in several parts of offshore structures, and in particular anticipated deep water structures. Prediction of the fatigue life of tubular joints and other welded connections is subjected to a large uncertainty arising from uncertainties in the computation of the environmental forces, the global and local response analysis of the structure and the fatigue strength and damage accumulation. Reliability methods provide the tools for efficient and accurate uncertainty analysis. Nominal failure probabilities are computed which allow a comparison between reliability levels for different elements or different designs and different types of failure. Important sources of uncertainties are determined and at the same time, the sensitivity of the reliability to various design parameters is determined. This paper also provides some practical experience of uncertainty modeling relevant for prediction of fatigue life and the models are applied in reliability of an example jacket structure.
Probabilistic fatigue analysis of offshore structures
Analyse der wahrscheinlichen Dauerfestigkeit von Offshore-Strukturen
Fatigue of Welded Constructions, Int. Conf. ; Apr ; 359-370
1988
12 Seiten, 3 Bilder, 2 Tabellen, 23 Quellen
Aufsatz (Konferenz)
Englisch
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