Caractérisation et modélisation numérique des poutres en Bois Massif Reconstitué (BMR) réalisées avec une essence locale feuillue

Abstract : Nowadays, adhesively reconstituted products made of beech timber appear to be of increasing interest for structural purposes due to its high strength/stiffness properties as compared to the most soft-wood species. Furthermore, beech timber is not recognized by most standards for structural uses and restricted to service class 1 and only the furniture, interior joinery and do-it-yourself sectors are still the major users. The French market shows great increasing imports of adhesively reconstituted structural products from Germany and Austria. Moreover, the use of local species, like beech, for the production of reconstituted structural elements could be better for the carbon balance, since it reduces import transportation. However, despite the high mechanical performance of beech timber, adhesively reconstituted products need to meet some requirements, such as the performance of finger-joints. This thesis presents experimental and numerical approaches to deal with the mechanical behaviour of adhesively reconstituted beech beams, for structural purposes. Two-layer and three-layer beams with or without finger-joints have been considered and successfully studied. In addition, a parametrical study has been undertaken to study the influence of several parameters on the mechanical resistance of finger-joints. We, finally, proposed an optimization of the finger-jointing geometry in order to increase the resistance of finger-joints
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van Dang Tran. Caractérisation et modélisation numérique des poutres en Bois Massif Reconstitué (BMR) réalisées avec une essence locale feuillue. Autre. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0187⟩. ⟨tel-01751138⟩

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