Recently, the risk of derailment accident caused by over-speed, earthquake and other reasons is concerned. For a bullet train, if derailment occurs, it brings about the unimaginable catastrophic accident. Thus, to prevent derailment accident of the bullet train is regarded as an important issue for the railway technology. As one of the effective measure, derailment stopper made of reinforced concrete is proposed. As it is difficult to evaluate the impact load under the collision between train and protective device, there are no design concepts for them against derailment accident. Therefore, this study aims at evaluating impact load by 3-dimensional non-linear FE analysis under the assumption of dynamic contact condition. From these calculations, impact load could be predicted, and failure possibility is estimated by analytical results.
