Buckling/Plastic Collapse Strength of Wide Rectangular Plate under Combined Pressure and Thrust〔含討論〕

概要

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A series of elastic/elastoplastic large deflection analyses is performed to clarify buckling/plastic collapse behaviour of a wide rectangular plate as a part of ship bottom plating subjected to combined lateral pressure and transverse thrust. A continuous plating with and without stiffeners is analysed to examine the influences of plate continuity and stiffeners on its buckling/plastic collapse behaviour. Firstly, influence of loading sequence of pressure and thrust loads is examined. The difference between the results of analysis using double bay and triple bay models is also examined for the case of stiffened plate with angle-bar stiffeners. Then, based on the results of elastic large deflection analyses, a semi-empirical formula is derived to evaluate the elastic buckling strength of a wide rectangular plate subjected to combined lateral pressure and transverse thrust considering the influence of plate continuity and stiffeners. At the end, the influences of pattern and magnitude of initial deflection as well as stiffeners on the ultimate strength of a wide rectangular plate are discussed through elastoplastic large deflection analyses on continuous plating with and without stiffeners.
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