Buckling Behavior of Randomly Corroded Stiffened Steel Plates Using Gaussian Distribution Under Uniaxial Compression

This paper presents the results of an investigation into the post-buckling behaviour and ultimate strength of imperfect corroded steel plates used in ship and other marine-related structures. A series of elastic-plastic large deflection finite element analyses is performed on both-sides randomly corroded steel plates. The effects of general corrosion are introduced into the finite element models using a random thickness surface model considering Gaussian distribution with different standard deviation. The effects on plate compressive strength as a result of parametric variation of the corroded surface geometry are evaluated. A proposal on the effective thickness is concluded in order to estimate the ultimate strength and explore the post-buckling behaviour of randomly corroded steel plates under uniaxial compression.

Keywords: Buckling; Random Corrosion; Ultimate Strength; Stiffened Plate; FE Modelling