A multi-body approach to solid dynamics is presented. The numerical method implemented is a
discrete element method (d.e.m.) specifically intended for the analysis of masonry structures. Contacts
between different blocks are treated using interacting forces. Contact forces are modelled using penalty method
for the normal component and an elasto-plastic behaviour for the shear. The model considers 3 different
types of damping. A first quantitative validation phase is presented together with possible future developments.
