Abstract
The paper addresses the problem of the influence of randomly distributed corrosion wastage on the collapse strength and behaviour of unstiffened/stiffened steel plates in longitudinal compression. A series of elastic-plastic large deflection finite element analyses is performed on both-sides randomly corroded steel plates and stiffened plates. The effects of general corrosion are introduced into the finite element models using a novel random thickness surface model. Buckling strength, post-buckling behaviour, ultimate strength and post-ultimate behaviour of the models are investigated as results of both-sides random corrosion.
Highlights
Plates and stiffened plates are the most important load-carrying elements in thin-walled structures, such as ships and offshore platforms
This paper presents the results of an investigation into the post-buckling behaviour and ultimate strength of imperfect corroded steel plates and stiffened plates used in ship and other related marine structures
6 CONCLUSIONS A series of nonlinear elastic-plastic finite element analyses has been performed on the plates and stiffened plates in different conditions of un-corroded and randomly corroded
Summary
Plates and stiffened plates are the most important load-carrying elements in thin-walled structures, such as ships and offshore platforms. Strength of plate and stiffened plate elements is crucial for the overall structural capacity of the whole structure. As a result of interactions between metallic structures of ships and offshore platforms with the maritime environment, corrosion happens. Corrosion has a harmful consequence from the view point of safety and can lead to thickness penetration, fatigue cracks, brittle fracture and unstable failure. These failures can imply a risk of loss of human lives and a risk of polluting the environment depending on the types of ships and offshore platforms
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