Abstract
In this paper, as the basic study to analyze the deformation of “ballast”, a track component of ballasted track which is composed of crushed stone, regarding its part as an assemblage of coarse granular materials, the application method of discrete analysis treating the problem including discontinuous boundaries to cyclic deformation of coarse granular materials was discussed by simulating triaxial tests of railroad ballast with DDA (Discontinuous Deformation Analysis). As a result, it was revealed that some new guidelines for the application method of DDA were indicated, and also quasi-static performance of railroad ballast is discussed in terms of fabric transformation of particle alignment.
