Method to construct the prestressed composite beam structure...

Details Method to construct the prestressed composite beam structure... Method to construct the prestressed composite beam structure...

E - Fixed Constructions

04

C

E04C 3/294 (2006.01) E04B 5/43 (2006.01) E04C 3/26 (2006.01)

Patent

CA 2134644

A prestressed composite beam structure from which the expansion joints, which were inevitably used in the conventional prestressed composite beam structure can be removed so that the structural and functional problems owing to the expansion joints can be solved and the span of beans can be lengthened, and construction materials can be considerably saved. The construction method in which the composite beams can be Dade into divided short beams in order to overcome the difficulties of transportation and handling in cases where the length of the prestressed composite beam is long. After the preflexion loads have been applied to the beam which was profiled in reverse to the sag curve of the continuous beam structure, concrete is cast and cured on the flange, and then the preflexion is removed. The problems of the negative moment on the connection between the beams is solved by lifing or lowering the support. For quick and easy assembling with the prestressed slab, the composite bean has shear key grooves and a reinforcing beam.

Structure de poutre composite précontrainte dont on peut supprimer les joints de dilatation qui étaient inévitablement utilisés dans la structure des poutres composites précontraintes conventionnelles, de sorte qu'on peut résoudre les problèmes structurels et fonctionnels liés aux joints de dilatation, allonger la portée des poutres et épargner considérablement en matériaux de construction. La méthode de construction permet de diviser les poutres composites en poutres plus petites dans le but de régler les problèmes de transport et de manutention dans les cas où la poutre composite précontrainte est de grande longueur. Une fois qu'on a appliqué les charges de préflexion à la poutre qui a été profilée à l'inverse de la courbe de flambage de la poutre à structure continue, le béton est coulé et soumis à la cure sur la semelle, puis on supprime la préflexion. On résoud les problèmes de moment négatif dans le joint entre les poutres en soulevant ou en abaissant le support. Pour un assemblage rapide et facile avec la dalle précontrainte, la poutre composite a des clés de cisaillement et une poutre de renfort.

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