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Publications
Yeter, B., Garbatov, Y. and Guedes Soares, C. (2017), “System reliability of a jacket offshore wind turbine subjected to fatigue”, Progress in the Analysis and Design of Marine Structures, Guedes Soares, C. & Garbatov Y. (Eds.), Taylor & Francis Group, London, UK, pp. 939-950
Fatigue failure is an important issue for jacket offshore wind turbine support structures. The welded tubular joints are subjected to the high stress levels due to the existence of stress concentration, which effect is amplified as the environmental conditions become more severe. It is thereby necessary to adopt an adequate methodology to assess the safety of the jacket support structures. The present work evaluates the design of a jacket offshore wind turbine support structure by using probabilistic methods. The fatigue lives of the welded tubular joints are estimated by using the spectral fatigue damage approach. A new limit state function, defined based on the Dirlik (1985) probability density function and the S-N approach, is developed. The first order reliability method is applied to evaluate the fatigue reliability of each welded tubular joint. The system reliability of the jacket offshore wind turbine structure is estimated to account for the correlation between the welded tubular joints.
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