Reliability-based assessment of ship hull girder ultimate strength

Abstract A reliability-based approach is presented to investigate the effects of structural and load uncertainties on reliability estimation ship hull girders. Structural included randomness in material properties, geometric initial imperfections, corrosion behavior. Load statistical uncertainties, model environmental related nonlinearity. The girder ultimate strength was calculated using Smith’s method, probabilistic density function evaluated by employing Monte Carlo simulations. In estimation, still water bending moment wave-induced were a simplified formula International Association Classification Societies-Common Rules code then modified with parameters. index estimated first-order method considering operating time, duration alternate hold loading condition, severity rate. As result, sagging conditions dominated collapse mode. indexes obtained for observed cases, viability assessed accordingly.