Journal
MARINE STRUCTURES
Volume 18, Issue 5-6, Pages 383-410Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.marstruc.2005.08.004
Keywords
ultimate strength; continuous stiffened panel; transverse thrust; lateral pressure; design formula; plate/stiffener interaction
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A simplified method to estimate the ultimate strength of a continuous plate, typical in ship bottom plating, subjected to combined transverse thrust and lateral pressure is developed. A series of elastic/elastoplastic large deflection finite element analysis (FEA) of a continuous plate supported along the lines of longitudinal stiffeners and transverse frames is performed. Attention is focused on the effect of a continuity of plating on its buckling and ultimate strengths, while the previous studies are mainly concerned with an isolated plate. Based on the FEA results, a set of formulae has been derived for the estimation of the ultimate strength of a continuous plate under combined transverse thrust and lateral pressure. An increase of elastic buckling strength and a change in the collapse mode from a simply supported mode to a clamped mode are considered as an effect of a continuity of plating. It has been proven from a comparison with FEA that the proposed formulae give very accurate predictions of the ultimate strength. (c) 2005 Elsevier Ltd. All rights reserved.
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