Time-dependent reliability assessment of ship structures under progressive and shock deteriorations

• Published in: Reliability engineering & system safety Vol. 173; pp. 116 - 128
• Main Authors: Liu, Yan, Frangopol, Dan M.
• Format: Journal Article
• Language: English
• Published: Barking Elsevier Ltd 01.05.2018; Elsevier BV
• Subjects: Corrosion; Cumulative-time failure probability; Deterioration; Failure modes; Hazard assessment; Hazards; Lateral pressure; Multi-hazard; Performance degradation; Permanent set; Probability; Reliability; Reliability analysis; Reliability engineering; Safety margins; Service life assessment; Ships; Shock; Structural reliability; Time dependence; Cumulative-time failure probability; Structural reliability; Multi-hazard; Permanent set; Corrosion
• ISSN: 0951-8320; 1879-0836
• DOI: 10.1016/j.ress.2018.01.009

•Lifetime reliability of structure under multiple hazards is analyzed using point-in-time and cumulative-time approaches.•Progressive and shock type deteriorations are included in lifetime structural performance deterioration model.•Safety and serviceability margins are adopted for structural failure analysis.•Proposed framework is applied to a structural component of a ship structure. The aim of this paper is to provide a rational reliability assessment of ship structures under multiple hazards during their lifetime. These hazards cause both progressive and shock deteriorations of structural performance. Time-dependent estimation of structural reliability must consider multiple failure modes. In this paper, the safety margins under progressive and shock hazards are evaluated separately for the associated failure modes. Considering the cumulative effect of multiple hazards during the lifetime, probabilistic structural deterioration process is represented by using cumulative-time approach. To present the multi-hazard analysis, corrosion and extreme lateral pressure are adopted as progressive and shock type hazards, respectively. Failure modes of buckling and permanent set are considered for safety and serviceability of a ship structure component. Side shell plating structure in a tanker is used to illustrate the evaluation of lifetime structural performance deterioration in multi-hazard environment.