The impact performance of concrete-filled double-skin steel tubes under seawater corrosion: A review

The study of the impact resistance of concrete-filled double-skin steel tube structures in the ocean environment is essential to ensuring the safety and reliability of ocean engineering structures, and it can also promote technological progress and industrial development in related fields. Thus, this review focuses on the effect of seawater corrosion on the impact performance of concrete-filled double-skin steel tube structural members. The effects of seawater corrosion on the tensile, compressive, and hysteretic properties of steel are first summarized. Secondly, the corrosion test methods currently used in most tests, such as salt spray, immersion, and artificially accelerated corrosion, are reviewed. The research progress on the impact performance of concrete-filled doubleskin steel tube members, joints and corroded concrete-filled double-skin steel tube structures is then systematically summarized. Such members mainly absorb impact through overall bending deformation. The hollow ratio, boundary conditions and other factors strongly influence their impact performance. Corrosion of course weakens the impact properties. Recommendations for further study on the impact performance of seawater-corroded steel structures are provided.