Des poutres en bois lamellé-agrafé à l’aide de bifaces comme alternative au bois lamellé collé

Details

Supervisors

Latteur, Pierre

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil des constructions

Abstract

enThe glued wooden structural elements are high-performance and aesthetically pleasing. However, for countries and individuals with limited means and tight timing, they prove to be uncompetitive. The aim of this work is to analyse the behaviour of reconstituted beams in which the wooden slats are assembled using double-sided metal connectors. This study will discuss the feasibility of this solution mainly from a performance point of view. The analysis of this new type of beams will be done via the experimental study of the sliding module "Kser", value which are not referenced in Eurocode 5 for the type of connector used. Once this value has been determined, an analytical theoretical study will be carried out. On one hand, according to the Gamma method described in Appendix B of Eurocode 5 for beams composed of three blades. On the other hand, according to the Kreuzinger model for beams composed of more than three blades. Finally, using a numerical model, it will be possible to compare the results obtained experimentally, analytically and numerically. The overall deflection of the beam, as well as the normal and the tangential stresses appearing in the reconstructed beams will be studied. The first results obtained show that the resistance of these beams seems to meet the imposed criteria, while their deformations seem excessive, of the order of three times those of homologous solid wood beams. This study is not sufficient to decide whether or not this solution could replace, in some cases, glued laminated wood beams. Further work will have to focus mainly on the geometry and nature of the double-sided connectors that hold the blades together.