Many over-road steel railway bridges of the metropolitan area have pillar form piers. However, there are few examples of researches on the evaluation of earthquake-resistance of the steel railway bridges having the pillar form piers till now. In this paper, we report the result of the fundamental examination of earthquake-behavior by the dynamic analysis, with parameter of rotary stiffness of pivot bearing, the lower lateral bracing and presence of brace members between the pillar form piers.
