Impact failure analysis of concrete check dam by distinct element method

Abstract

This paper presents an impact response analysis for the collision behavior of concrete check dams by using a distinct element method (DEM). The object of this study is to provide the fundamental data for the impact resistant design of concrete check dam under huge stones in the debris flow. At first a concrete check dam sleeve is modeled into circle rigid elements with a spring and a dashpot. The impact response and failure of a model test was simulated by the DEM. Then, the effect of impact absorbing energy is examined for a sand bag on a model of the concrete check dam sleeve. Finally, the damage of actual concrete check dam under debris flow has been simulated by changing the loading condition. It is found that the DEM can simulate well the impact model test in a small scale and the actual damage profile in the case of the loading condition in which a huge stone, dynamic water pressure and the earth pressure are applied.