Residual compressive strength of inclined steel tubular members with local corrosion

• Residual compressive strength of inclined steel tubular members with local corrosion.
• Compressive loading test for inclined tubular member with local corrosion.
• Examining failure mode and compressive behaviors of inclined tubular member depending on local damage condition.
• Suggesting relationship between compressive strength and local corrosion condition.

In jacket-type offshore structures, corrosion damage affects the structural performance under compressive loading, which is created by the working and design loads of the main system. In this study, the effects of corrosion damage on the compressive structural behavior and strength of steel tubular members were investigated. Artificial corrosion damage was applied to the tubular specimens via mechanical processing and hand drilling to replicate the inclined nature of jacket-type offshore structures. The damage was applied to either half or all of the circumference of the specimens. The compressive failure modes of the artificially corroded tubular members were affected by the corrosion conditions. The compressive strengths were also affected by the level of corrosion. From the results of this study, the residual compressive strengths of corroded tubular steel members can be estimated based on the condition of the damaged sectional areas.