Damping considerations for rocking block dynamics using the discrete element method

It is well established that unreinforced masonry (URM) buildings develop damage-forming collapse mechanisms during high-intensity earthquakes, with these exhibiting large rocking displacements before collapsing. The Discrete Element Method (DEM) of analysis can realistically capture phenomena involve movements elements, resulting in the technique being ideal for simulating URM building elements. Consequently, extensive research using DEM to analyse seismic response and components has recently been published. However, variety reported damping approaches have apparently led results successfully replicate physical observations underscores need consistent guidance related assignment factors. Rayleigh distribution model implemented software 3DEC was used study differences between mass proportional (MP) stiffness (SP) configurations. After reviewing be damped previous works where implemented, capabilities drawbacks time-efficient MP configuration were studied compared simulations SP damping. When considering numerical incorporated seemingly well-matched experimental tests, it found apparent robustness decisions pertaining adopted input parameters deceptive most cases. recommended all simulations, even though could satisfactory accuracy certain situations discussed herein. A pragmatic relationship both strategies proposed.