座屈・耐荷力（柱）

[I-26] Buckling strength evaluation of corroded steel shapes under axial compressive force

*久積 和正¹、菅野 良一¹、冨永 知徳¹ (1. 日本製鉄)

Keywords:corrosion, steel shapes, coupled buckling, slenderness ratio, effective cross sectional area

Corrosion is one of the most serious threats to the sustainability of steel structures, especially for those exposed to the atmosphere and subjected to improper maintenance management. As corrosion-related problems and accidents have been frequently reported in recent years, the need for identifying the health condition of structures has increased. In this context, the axial compressive strength of corroded steel shapes is investigated with experiments and non-linear finite element analyses. As the results, a strength formula considering the interaction between global and local buckling is proposed, showing that it can reasonably be used for estimating the strengths of corroded shapes.