抄録
The mechanical behavior of a particle assembly is described based on Cundall's Distinct Element Method (DEM) which uses an explicit numerical scheme. The DEM is a numerical technique specifically designed to solve problems where continuity cannot be ensured throughout the analysis. We used this method to study the flow mechanism of dry rock avalanches which frequently take place following strong earthquakes. On the basis of the results obtained from a numerical simulation, we conclude 1) that the largest pieces of rock float up to the surface of the flow and 2) that they become concentrated at the front of the flow.
