Localized Corrosion Damage Study and Strengthening Strategies on Orthogonal Concrete Filled Steel Tubular Column

Concrete-filled steel tubular (CFST) columns are widely used in the construction industry due to their high strength and durability. However, localized corrosion can significantly reduce the structural integrity of these columns, leading to potential safety hazards. This project aims to investigate the localized surface corrosion damage on ‘L’ shaped orthogonal CFST columns and propose effective strengthening strategies using ANSYS software. The behavior of L-shaped CFST columns under axial loading due to influence of various parameters such as Degrees of Volume loss (DoV), corrosion position and corrosion location are studied. The worst-performed model during axial loading is identified. As an effective strengthening scheme to overcome the damage according to severity, Fiber Reinforced Polymer (FRP) wrapping technique is used. Carbon Fiber Reinforced Polymer (CFRP), Glass Fiber Reinforced Polymer (GFRP), Aramid Fiber Reinforced Polymer (AFRP), and Basalt Fiber Reinforced Polymer (BFRP) are the FRPs used. A study to find out which fiber will help to regain more strength and how many layers of wrapping are needed for the same is done. The findings of this project will contribute to the development of effective strategies for mitigating the effects of localized corrosion in CFST columns and enhancing their structural performance.