Following recent large-scale earthquakes, plastic deformation and buckling have been observed at the bearings of steel bridges. It is important to evaluate the vertical and horizontal load-carrying capacity after seismic events. In this study, in order to grasp the load-carrying capacity of the steel I-girder bridge, the load-displacement relationship caused by horizontal and live loads, and events occurring in bearings were investigated by using FE model. As a result, the damage events occurring in the members under each load were clearly identified. Furthermore, considering the point at which residual deformation increases sharply, the state in which the effective column section of all girder bearings undergo full-section yielding could potentially be defined as limit state 2 for each load direction.
