抄録
Use of a recently developed lean duplex stainless steel JIS SUS821L1 contributes to reducing the life cycle cost of infrastructures due to its low material cost and relatively high corrosion resistance. This study aims to investigate initial imperfections and the ultimate strength of SUS821L1 welded stub-column with H-shaped sections experimentally. In order to supplement experimental data by numerical analysis including parametric studies, coupon test results and the measured residual stress data are compared to existing stress-strain model for stainless steels and predictive model for residual stresses, respectively. Based on experimental and numerical results, a formula predicting the ultimate strength of the column is proposed.
