ポスト形式橋脚を有する鋼鉄道橋の地震時挙動に関する基礎的検討 Fundamental examination of earthquake-behavior of steel railway bridge with pillar form piers

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.