In earthquake resistant design, strength and deformation capacity of beams is estimated by local buckling of the flange plate in comoressive side. However, many experimental reports represent that, in case of beams having scallops, brittle fracture is preceded to local buckling. In this study, we aim to grasp the effect of width-thickness ratio on deformation capacity of beams with scallops by bending tests. Moreover, it is referred that the range of the width-thickness ratio to which the deformation capacity decreases by applying the scallop is referred.
