Abstract
It is important to estimate the ultimate strength of U-shaped steel girders before the concrete slabs hardening under construction. Therefore, it is necessary to grasp the feature of the ultimate strength of U-shaped steel girders. However, only few experimental studies have so far been made at the ultimate strength of U-shaped steel girders. The purpose of this study is to investigate the characteristic of the bending strength of U-shaped steel girders by experiments. Furthermore, the method of evaluating the bending strength of U-shaped steel girders is developed by extending the previous method for I-shaped steel girders and the validity of the proposed method is confirmed by comparison with experimental results.