座屈・耐荷力（柱）

[I-20] Fundamental research on difference in cyclic-elasto-plastic properties between two SM570 steels

Masanao Honda¹, *Hiroshi Tamura¹, Hiroshi Katsuchi¹, Jiaqi Wang¹, Shinya Kanda², Yuji Migitaka³, Natsumi Takeshima⁴ (1. Yokohama National University, 2. Metropolitan Expressway, 3. Technology Center of Metropolitan Expressway, 4. IHI Infrastructure Systems)

Keywords:SM570, cyclic-elasto-plastic properties, production lot, strain hardening