A computational investigation of the effects of both-sides general corrosion on the buckling/plastic collapse behaviour and strength of stiffened plates |
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Authors: | Mohammad Reza Khedmati Zorareh Hadj Mohammad Esmaeil Nouri Karim Moradidohezari |
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Institution: | (1) Faculty of Marine Technology, Amirkabir University of Technology, 15914 Tehran, Iran |
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Abstract: | This paper presents the results of an investigation into the post-buckling behaviour and ultimate strength of imperfect corroded
stiffened steel plates used in ships and other marine-related structures. A series of elastic–plastic large deflection finite
element analyses is performed on stiffened steel plates suffering general corrosion wastage with random distribution. General
corrosion is introduced into the finite element models using a random thickness surface model. The effects of corroded stiffened
plate parameters on the post-buckling and ultimate strengths are evaluated in detail. The stiffeners of different symmetrical
or unsymmetrical cross-sections are introduced into the models for analysis. Some distinctions are explored and highlighted
between the behaviours of steel plates suffering general corrosion in unstiffened and stiffened cases. Finally, a proposal
is given in order to simulate the average stress–average strain relationship of stiffened steel plates having both-surface
general corrosion wastage. |
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