Influence of orientation and number of layers on the elastic response and failure modes on CLT floors: modeling and parameter studies

Lorenzo Franzoni (1, 2) , Arthur Lebée (2) , Florent Lyon (1) , Gilles Forêt (2)

1 CSTB - Centre Scientifique et Technique du Bâtiment
2 navier umr 8205 - Laboratoire Navier

In the present paper, the bending behavior of Cross Laminated Timber panels is investigated by means of the linear elastic exact solution from Pagano (1970; 1969). The resulting stresses are the input for a wood failure criterion , which can point out the first-crack load and the respective dominant failure mode. Heterogeneous layers are mod-eled as equivalent and homogeneous layers. This simplified and deterministic modeling gives results in good agreement with a reference experimental test. A comparison is made with respect to the panel's global stiffness and failure stages within the apparent elastic stage. Finally, parameter studies are carried out, in order to quantify CLT limitations and advantages. The effect of varying properties like the panel's slenderness, orientation of transverse layers and number of layers for a fixed total thickness are investigated.

Domaines: Structures; Matériaux composites et construction; Eco-conception

Lorenzo Franzoni, Arthur Lebée, Florent Lyon, Gilles Forêt. Influence of orientation and number of layers on the elastic response and failure modes on CLT floors: modeling and parameter studies. European Journal of Wood and Wood Products, 2016, ⟨10.1007/s00107-016-1038-x⟩. ⟨hal-01306593⟩