In structural systems manufactured using XLAM panels, connections are made using metal elements and cylindrical dowel type metal fasteners. Connections are so built both in the case of the link between the wall panels and the concrete slab and between wall and floor panels. In these systems the resistance to horizontal actions - wind and earthquake - is totally entrusted to the metal connector systems arranged in such a way as to absorb the horizontal forces and to prevent the uplift effects of the wall. Special connections are then used: angle brackets, to ensure the transfer of shear actions, and the so called "hold-down" adopted in order to counteract the tensile actions causing the rocking behavior of the wall. The global behaviour of the entire structure is directly influenced by strength and stiffness of metal elements; because of the high in-plane stiffness of the wooden panel, is therefore reasonable to consider as fundamental the contribution of the connector deformability on the global displacement of the wall. In this paper, an extensive experimental campaign on a large number of types of hold-down and angle bracket is presented.
Experimental investigation of the behaviour of different types of connections between the XLAM panels and the concrete slab
Acler, Ermanno;Piazza, Maurizio;Tomasi, Roberto;
2011-01-01
Abstract
In structural systems manufactured using XLAM panels, connections are made using metal elements and cylindrical dowel type metal fasteners. Connections are so built both in the case of the link between the wall panels and the concrete slab and between wall and floor panels. In these systems the resistance to horizontal actions - wind and earthquake - is totally entrusted to the metal connector systems arranged in such a way as to absorb the horizontal forces and to prevent the uplift effects of the wall. Special connections are then used: angle brackets, to ensure the transfer of shear actions, and the so called "hold-down" adopted in order to counteract the tensile actions causing the rocking behavior of the wall. The global behaviour of the entire structure is directly influenced by strength and stiffness of metal elements; because of the high in-plane stiffness of the wooden panel, is therefore reasonable to consider as fundamental the contribution of the connector deformability on the global displacement of the wall. In this paper, an extensive experimental campaign on a large number of types of hold-down and angle bracket is presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione