Ductility improvement of adjustable pallet rack speed-lock connections: Experimental study

This paper presents seismic cantilever monotonic and cyclic tests of speed-lock (boltless) beam-to-upright connections adjustable pallet rack systems; the objective is to obtain bounds that are employed define loading protocol subsequent tests. The consist welding beam an intermediate end-plate (L-shaped) that, in its turn, linked upright through a hooked assembly. performed experiments investigate hysteretic behavior, as it contributes lateral strength, stiffness, ductility. More precisely, main this research propose new strengthened design weld beads geometric configuration. oriented for connection failure not arise weld, but shift expected increase ductility; sense, specimens with traditional novel designs tested. In most performed, results confirm leads more ductile modes; preliminary evaluations state ductility might be sufficient absorb input energy. On other hand, conducted according two protocols: one by following European regulations strategy proposed Prof. Castiglioni accounting influence gravity loads. Comparison between their shows approach demanding seems reproduce actual behavior racks better.