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Publicações
Saad-Eldeen, S., Garbatov, Y. e Guedes Soares, C. (2015), “Residual strength of a severely damaged box-girder with non-uniform and inter-crystalline corrosion”, Analysis and Design of Marine Structures, Guedes Soares, C. & Shenoi R.A. (Eds.), Taylor & Francis, London, UK, pp. 521-531
The objective of this study is to analyse a severely damaged box-girder subjected to combined action of non-uniform and inter-crystalline corrosion. The inter-crystalline corrosion, due to the differences in the metal composition of the base and weld toe material, degrades the weld toe between the stiffeners and associated plates leading to a disintegration of structural components and a severe reduction of the strength. In addition, damages originating from dropping objects or collision may also contribute to the strength reduction. The present work investigates the effect of different damage scenarios leading to a symmetrical and asymmetrical stiffness reduction in the strength capacity of a severely corroded and damaged three-bay box girder. A series of static nonlinear finite element analyses are conducted. Different severities of the assumed damage scenarios are considered to identify both symmetric and asymmetric stiffness and strength reductions. The partial and entire damage of one ring-web-frame, transforming the box-girder from a three to two-bay structure is also studied. The effect of stiffness reduction on the moment-curvature relationships, failure modes, ultimate strength as well as the movement of the neutral axis are presented and discussed.
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