Analysis of stress concentration factor of corroded steel member under fatigue load versus time

This study focuses on analyzing the fatigue behavior of corroded steel structures. Accordingly, the accelerated corrosion experiments on steel structure working with concrete were conducted in the laboratory. Due to the increasing number of corrosion cycles to analyze the corrosion change process over time. The obtained corrosion specimens were taken out to conduct the fatigue behavior. The crack formation and propagation leading to fatigue damage combined with corrosion is very complex. This study proposed a method to determine the stress concentration factor Kt by the finite element method. Based on that, the optimal size, element mesh, and number of layers on the FEM model were also specifically presented. The confidence curve was proposed to design the fatigue life (S-N) of corroded steel plate in contact with concrete in terms of effective thickness. The results from this study will add useful knowledge to the design and maintenance of steel structures in practice.