Ultimate Strength of Thin-Walled Structures with General/Pitting Corrosion, Fatigue Cracks and Local Impacts

摘要

This paper is a summary of recent developments in the areas related to the ultimate strength limit state of damaged steel plate panels, undertaken by the authors. Localized/general corrosion, fatigue cracking and local dent typically found in aging marine structures are considered in this paper as types of damage. A series of collapse tests and nonlinear finite element analyses are carried out in the present study on steel-plated structures with general/pit corrosion, fatigue cracking or local denting, with varying the type, size or location of damage as well as geometric and material properties of the test structures. By a regression analysis of the tested and computed results, ultimate strength design formulae are derived in closed-form. The results and insights developed from the present study are summarized.