Aligned fiber reinforcement panel for wood members

B - Operations – Transporting – 32 – B

Patent

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B32B 5/08 (2006.01) B27N 3/06 (2006.01) B29C 37/00 (2006.01) B29C 59/00 (2006.01) B29C 70/02 (2006.01) B29C 70/08 (2006.01) B29C 70/16 (2006.01) B29C 70/52 (2006.01) B29C 70/54 (2006.01) B29C 70/64 (2006.01) B32B 5/12 (2006.01) B32B 21/08 (2006.01) B32B 21/10 (2006.01) D04H 1/00 (2006.01) D04H 3/02 (2006.01) D04H 5/04 (2006.01) D04H 5/08 (2006.01) E04C 3/12 (2006.01) E04C 3/17 (2006.01) E04C 3/18 (2006.01) E04C 5/07 (2006.01)

Patent

CA 2156417

A reinforcing panel (22) and process for making the same for use in reinforcing wood structural members uncluding laminated beams, wood I-beams, and trusses. The reinforcing panel is comprised of a plurality of synthetic fibers (24) that are arranged parallel to one another and aligned with the longitudinal direction of the panel, and accordingly the wood structure. The panel has substantially no transverse fibers. The fibers are maintained in position by a resin encasement (26) that completely encloses the fibers with the exception of some fibers that are closest to the surface. The surface of the reinforcing panel is treated so that those fibers (28) closest to the surface of the panel are caused to "hair up" so that the reinforcing panel may be used with nonepoxy adhesives which are commonly used in the laminated beam industry, such as resorcinal. The reinforcing panel of the present invention is fabricated by an improved pultrusion process which uses no mandrels, or woven mats and which provides for a selectable back pressure so that the fibers of the reinforcement panel are maintained in a state of tension during the resin cure, thereby: maintaining the parallel arrangement of the fibers, maintaining the longitudinal alignment of the fibers, and setting the initial strain of the fibers to decrease the initial deflection of a wood structure that is reinforced with the reinforcing panel of the present invention.

Panneau de renfort (22) et procédé de réalisation de ce panneau, destiné au renfort d'éléments structurels en bois tels que des poutres stratifiées, des poutres en bois à section en H ou des arbalétriers. Le panneau de renfort est constitué d'une série de fibres synthétiques (24) disposées parallèlement les unes aux autres, dans le sens longitudinal du panneau, conformément à la structure du bois. Le panneau ne comporte pas essentiellement de fibres transversales. Les fibres sont maintenues en place par un enrobage de résine (26) qui les enferme totalement, à l'exception de quelques unes qui sont les plus proches de la surface. La surface du panneau de renfort est traitée pour que les fibres (28) les plus proches de cette surface subissent un effilage superficiel permettant de mettre en oeuvre le panneau de renfort avec des colles non époxydes utilisées couramment dans l'industrie de la stratification des pièces de charpente, comme le résorcinol. Le panneau de renfort visé par l'invention est réalisé selon un procédé de pultrusion amélioré ne mettant en oeuvre ni mandrin ni tapis tissé et permettant d'assurer une retenue modulable, de manière à maintenir les fibres du panneau de renfort dans un état de tension pendant que la résine durcie, ce qui contribue à maintenir la disposition parallèle des fibres, maintenir l'alignement des fibres dans le sens de la longueur et déterminer la contrainte intiale des fibres de manière à diminuer la déflection initiale de la structure en bois renforcée par le panneau de renfort.

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