Fatigue Strength Curve for Tubular Joints of Offshore Structures under Dynamic Loading

Offshore structures are subjected to dynamic environmental loads (wave and wind loads). A stress-life fatigue strength curve is proposed for tubular joints which in the splash zone area of offshore jacket structures. The Det Norske Veritas (DNV) standards given design T-curve air modified with environment-dependent parameters obtain this curve. Validity done by comparing lives experimental tested seawater under different loading conditions. assessment a case study joint performed using Nominal stress ranges members, connected joint, obtained analysis structure. Stress concentration factors utilized nominal stresses hot spot ranges. Fatigue calculated compared conventional approach. Hence applicability significance discussed.