Check dam structures had been constructed in the upriver distinct in order to prevent the disaster by debris flow. Steel frame dam is one of these protective structures, and it is considered as the rational and economic due to its unique structural system. Steel frame dam is composed of the comparatively thin frame members and a number of local small gravels that filled in the frame casing. Although, these gravels and steel frames are expected to reinforce each other against the impact load, their impact behavior and dynamic strength have not been investigated. Thus, this paper presents an analytical approach on the dynamic strength of steel frame dam by one’s own improved 3-dimensional distinct element method.
