Journal
JOURNAL OF SHIP RESEARCH
Volume 55, Issue 4, Pages 289-300Publisher
SOC NAVAL ARCH MARINE ENG
DOI: 10.5957/JOSR.55.4.100042
Keywords
Design (general); shipbuilding; corrosion; ultimate strength
Categories
Funding
- European Union [TNE3- CT-2003-506141]
- Portuguese Foundation for Science and Technology (Fundacao para a Ciencia e Tecnologia - FCT) [SFRH /BD/ 46790 /2008]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/46790/2008] Funding Source: FCT
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This paper presents a corrosion-dependent analysis of the ultimate strength analysis of aged box girders based on experimental results. Three multispan corroded stiffened box girders subjected to four-point vertical load are analyzed, idealizing the behavior of midship sections of full ships. The specimens have three levels of corrosion. Two corrosion-dependent formulas for assessing the ultimate strength as well as the ultimate bending moment of corroded structures are proposed. Using a time-dependent corrosion growth model, equivalent time-dependent formulations are developed. The effect of corrosion degradation on the residual stresses during the service life is also analyzed, and a regression equation for predicting the remaining residual stresses along the service life is proposed. Finally, a corrosion-dependent moment curvature relationship has been developed accounting for the changes in geometrical characteristics and material properties of the tested box girders.
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