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Publications
Garbatov, Y. and Guedes Soares, C. (2007), “Reliability of Aged Ship Structures”, Condition Assessment of Aged Structures, Paik, J. K. and Melchers, R. E. (Eds.), Woodhead Publishing Ltd., Cambridge, England, pp. 253-286
The chapter presents recently developed method for the reliability assessment of ship hulls subjected to the degrading effect of corrosion and of fatigue. The model allows for the existence of multiple cracks both in the stiffeners and in the plating and it models the crack growth process. The effect of corrosion is presented as time dependent. The long-term stress range acting on the elements is defined as a function of the local pressure of the internal cargo and outside water combined with the hull girder bending stresses, which is due to combined horizontal and vertical bending moments. The effect of corrosion and fatigue deterioration on the section modulus is accounted for and it is used as the reference variable to measure the reliability of the ship hull against collapse. The effect of maintenance actions is modelled as a stochastic process and different repair policies are also discussed.
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