2020 • In Chen, Airong; Ruan, Xin; Frangopol, Dan M. (Eds.) Life-Cycle Civil Engineering: Innovation, Theory and Practice: Proceedings of the 7th International Symposium on Life-Cycle Civil Engineering (IALCCE 2020), October 27-30, 2020, Shanghai, China
[en] Offshore Wind Turbine (OWT) support structures are subjected to harsh deterioration mechanisms
due to the combined action of wind loading, sea induced load actions and corrosive environment. Fatigue failure becomes a key failure mode for offshore wind structures, as they experience considerable number of stress cycles (more than 10 million cycles per year). Fatigue failure can be assessed through fatigue assessment approaches. However, such assessments possess various uncertainties which may be quantified and updated through findings from in-service inspections. Since, offshore maintenance actions incur significant costs, an optimal maintenance strategy which balances the maintenance efforts against the risk of failure is desired. Based on pre-posterior decision theory, a risk-informed maintenance optimization can be performed to define the optimal
maintenance strategy and support the decision maker(s).Within the risk maintenance optimization scheme, the probabilistic deterioration model is updated based on the inspection outcomes. Several fracture mechanics models have been used in the literature to estimate the deterioration of the structure containing flaws. Although, a through-thickness failure criterion is commonly used in the literature as the failure criteria, a Failure Assessment Diagram (FAD) approach has been receiving increasingly attention, as well. This investigation examines the effect of the selected fracture mechanics models and failure criteria on the optimal maintenance strategy.
Moreover, the obtained maintenance strategies corresponding to different fracture mechanics models are compared for a tubular joint case study structure.
Research Center/Unit :
Architecture navale et systèmes de transports ANAST
Disciplines :
Civil engineering
Author, co-author :
Hlaing, Nandar ; Université de Liège - ULiège > Département ArGEnCo > Constructions hydrauliques et navales
Morato Dominguez, Pablo Gabriel ; Université de Liège - ULiège > Département ArGEnCo > ANAST (Systèmes de transport et constructions navales)
Rigo, Philippe ; Université de Liège - ULiège > Département ArGEnCo > Constructions hydrauliques et navales
Amirafshari, Peyman; University of Strathclyde > Department of Naval Architecture
Kolios, Athanasios; University of Strathclyde > Department of Naval Architecture
Nielsen, Jannie S.; Aalborg University > Department of the Built Environment
Language :
English
Title :
The effect of failure criteria on risk-based inspection planning of offshore wind support structures
Publication date :
27 October 2020
Event name :
The Seventh International Symposium on Life-cycle Civil Engineering, IALCCE2020,
Event organizer :
Tonji University
Event place :
Shanghai, China
Event date :
27-10-2020 to 30-10-2020
Audience :
International
Main work title :
Life-Cycle Civil Engineering: Innovation, Theory and Practice: Proceedings of the 7th International Symposium on Life-Cycle Civil Engineering (IALCCE 2020), October 27-30, 2020, Shanghai, China
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