IBS2 - Poutrelles en bois - Solidité, économie, polyvalence
IBS1 - Humidité et bâtiments à ossature bois
L'évolution historique des limites de taille des bâtiments dans le code national du bâtiment du Canada
Guide de référence pour les immeubles de taille moyenne en Ontario
Exemple de conception d'ouvertures dans un diaphragme en bois
Exemple de conception d'un diaphragme en bois sur des murs de cisaillement en CMU armé
Exemple de conception d'un diaphragme en bois à l'aide de la méthode de l'enveloppe
Flexibilité du diaphragme
Diaphragms are essential to transfer lateral forces in the plane of the diaphragms to supporting shear walls underneath. As the distribution of lateral force to shear walls is dependent on the relative stiffness/flexibility of diaphragm to the shear walls, it is critical to know the stiffness of both diaphragm and shear walls, so that appropriate lateral force applied on shear walls can be assigned. In design, diaphragms can be treated as flexible, rigid or semi-rigid. For a diaphragm that is designated as flexible, the in-plane forces can be assumed to be distributed to the shear walls according to the tributary areas associated with each shear wall. For a diaphragm that is designated as rigid, the loads are assumed to be distributed according to the relative stiffness of the shear walls, with consideration of additional shear force due to torsion for seismic design. In reality, diaphragm is neither purely flexible nor completely rigid, and is more realistically to be treated as semi-rigid. In this case, computer analysis using either plate or diagonal strut elements can be used and the load deflection properties of the diaphragm will result in force distribution somewhere between the flexible and rigid models. However, alternatively envelope approach which takes the highest forces from rigid and flexible assumptions can be used as a conservative estimation in lieu of computer analysis
