2023 Volume 79 Issue 12 Article ID: 23-00173
The stainless steels have high corrosion resistance than the structural carbon steels. The stainless steel structures can improve the maintenance performance. This paper proposes an evaluation method for interaction buckling strength of square hollow section columns made of Cr-Ni type stainless steels.
First, the numerical analysis model was created by changing the slenderness ratio parameter 𝜆 and width thickness ratio parameter R. Second, the relationship between load and displacement of the stainless steel columns was compared with the results for the carbon steel columns. Then, the deformation of these columns was investigated and classified into overall buckling, local buckling and interaction buckling for each column parameters. Finally, a strength evaluation method was proposed for the interaction buckling of stainless steel columns based on the strength curve for overall buckling, considering the reduction in local buckling strength. The proposed evaluation method can evaluate the interaction buckling of stainless steel columns in the range of 92% to 111%, and is more reasonable than previous design methods.
