Friction dissipative devices for cladding panels in precast buildings: an experimental investigation

This study focuses on the design and experimental assessment of the behaviour of friction dampers to be used along the edges of cladding panels in precast r/c buildings. The concept and design of such devices is based on a no-slip requirement under wind and moderate earthquake loadings, while allowing large displacements and consequent significant energy dissipation due to friction for higher intensity earthquakes. Elements were custom-built by assembling, through bolted connections, of steel profiles, in case with interposed brass plates, to obtain a more stable response under cyclic loadings. An experimental investigation has been performed in order to characterize the behaviour of these devices under cyclic loadings, including the displacement rate effect. The work is intended as prodromal to a wider assessment of the seismic behaviour of precast r/c structures with friction damping panel-edge connections.