This paper investigates the bending performance and design applicability of I-girders with Steels for Bridge High Performance Structure 400 (SBHS400). Though SBHS400 can reduce the construction cost, the effect of its high yielding ratio on bending performance has not been fully investigated. In this study, maximum bending resistance and rotation capacity of SBHS400 girders were evaluated and compared to existing design curve and girders with a conventional material by experiments and finite element analyses. Parametric study was conducted with varying width-thickness ratios and strain hardening characteristics. It was clarified through this research that bending capacities of SBHS400 girders are almost same as with conventional steel girders and satisfy criterion of current AASHTO LRFD bridge design specifications and Japanese design specifications for highway bridges.
