PREFABRICATED TRUSS-EMBEDDED COMPOSITE BEAM
World Intellectual Property Organization Patent
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Abstract
The present invention relates to a composite beam in which a prefabricated truss is embedded in concrete and, more specifically, to a composite beam in which a prefabricated truss functions as a truss beam bearing concrete weight and construction load when concrete is in a liquid state before being cured, and the prefabricated truss functions as a main structural member along with the concrete after the concrete is cured. The prefabricated truss-embedded composite beam having a sheathing board attached thereto, according to an appropriate embodiment of the present invention, comprises: a prefabricated truss; a sheathing board; and concrete. The prefabricated truss comprises: a lower chord which is configured in a plate shape with a fixed thickness, and to which screw rods having threads formed on both ends or the whole section thereof are coupled at certain intervals along the longitudinal direction so as to protrude in the width direction; a pair of foldable web members which are configured in a zigzag shape by connecting ends of multiple flat steel bars, and have lower ends coupled to both ends of the width direction of the lower chord after the screw rods coupled to the lower chord penetrate through holes formed on joints of the flat steel bars and D-cones are externally coupled; and a pair of upper chords which are configured so as to comprise a vertical plate having coupling holes perforated therein at certain intervals along the longitudinal direction, and a horizontal plate configured on the upper end of the vertical plate, and which are coupled to the pair of foldable web members after the screw rods penetrate the coupling holes of the vertical plate and the upper through holes of the foldable web member and the D-cones are externally coupled. The sheathing board is configured so as to accommodate the prefabricated truss within the cross section thereof and to have a U-shaped cross section with an opened upper surface, and is fixed to the prefabricated truss after bolt holes are perforated at positions corresponding to the D-cones coupled to the upper chord and the lower chord of the prefabricated truss and bolts are externally coupled to the D-cones through the bolt holes. The concrete is integrated with the prefabricated truss by being placed within the cross section of the sheathing board. The sheathing board is removed by loosening the bolts after the concrete is cured.

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