Numerical Study on the Effect of Coarse-Aggregate Morphology on Shear Performance

摘要

The effect of coarse-aggregate morphology on shear performance was investigated by the discrete element modeling in this paper. An algorithm was developed first to compact aggregates without the need to know the void content. This algorithm uses four steps (aggregate generation, gravity compaction, wall accelerated compaction, and wall uniform compaction) to compact a coarse-aggregate sample. The triaxial shear test was then simulated to evaluate the shear performance of coarse aggregates. Effects of the aggregate angularity, surface texture, flat and elongated ratio, and flat and elongated particle content on the shear performance of coarse aggregates were finally studied based on the results of the triaxial shear test.