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Publicações
Yeter, B., Tekgoz, M. Garbatov, Y. and Guedes Soares, C. (2019), “Fragility analysis of ageing monopile owt structure subjected to seismic loads”, 4th Workshop and Symposium on Safety and Integrity Management of Operations in Harsh Environments: Risk, Reliability and Resilience (CRISE4), 15-17 July, St. John's, Newfoundland, Canada, p. 1-9
The present work aims to analyze the fragility of a 5MW monopile offshore wind turbine structure subjected to seismic activities accounting for soil interactions and time-variant structural degradation. The structure is subjected to different ground motions with different intensity. The nonlinear full-transient dynamic structural analysis is performed based on the finite element method, and the nonlinear monopile structural response during the seismic activity is discussed. Finally, the fragility curves associated with the serviceability limit state design and the ultimate strength limit state are developed.
The loads induced as a result of seismic activities may jeopardise the serviceability of the offshore wind turbine, or may even lead the structure to reach the ultimate collapse strength. The maximum load carrying capacity of a support structure can be estimated by performing a structural assessment which accounts for the nonlinear effects arising from the material and geometry. The present work aims to analyse the fragility of a 5MW monopile offshore wind turbine structure subjected to seismic activities accounting for soil interactions and time-variant structural degradation. The structure is subjected to different ground motions with different intensity. The nonlinear full-transient dynamic structural analysis is performed based on the finite element method, and the nonlinear monopile structural response during the seismic activity is discussed. Finally, the fragility curves associated with the damaged and collapsed limit state are developed.
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