Wineglass-shaped section steel-concrete composite beam and construction method thereof

Abstract

The invention discloses a wineglass-shaped section steel-concrete composite beam which comprises an I-shaped section steel beam. Two upper webs and two end plates in the vertical direction are weldedto the edges of the periphery around an upper flange of the I-shaped section steel beam correspondingly; an open steel box is jointly composed of the two upper webs, the two end plates and the upper surface of the upper flange; and a plurality of PBL stiffening ribs are arranged on the inner surfaces of the two upper webs and the upper surface of the upper flange in the longitudinal direction, then a plurality of pulling rods are used for cross-pulling the PBL stiffening ribs of the two upper webs at certain distances and intervals, and the open steel box is filled with concrete. The inventionfurther discloses a construction method of the wineglass-shaped section steel-concrete composite beam. Compared with a reinforced concrete beam, the self-weight of the wineglass-shaped section steel-concrete composite beam is decreased by 50% or above; compared with a traditional steel-concrete composite beam, concrete pouring is convenient, and the wineglass-shaped section steel-concrete composite beam can adapt to the larger span; and compared with the I-shaped section steel beam, the wineglass-shaped section steel-concrete composite beam is more reasonable in force bearing performance andbetter in comprehensive economic performance.

Description

technical field [0001] The invention relates to a steel-concrete composite beam, in particular to a steel-concrete composite beam with a wineglass-shaped cross section and a construction method, belonging to the technical field of construction. Background technique [0002] Composite structures are currently one of the hotspots in the field of civil engineering research. The most basic work to study composite structures is to study composite components. Steel-concrete composite beams are one of the composite components that are widely used and relatively mature in research. The steel-concrete composite beam described here is composed of a concrete slab and a steel beam connected by shear connectors, so that the concrete slab is mainly subjected to compression and the steel beam is mainly subjected to tension, giving full play to the advantages of the two materials. [0003] Traditional steel-concrete composite beams are mainly composed of reinforced concrete wing plates, I-s...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that there are too many shear connectors in the traditional steel-concrete composite beam, which increases the construction cost, slips at the interface between steel and concrete, lifts up vertically, and has poor lateral stability. The torsional capacity of ordinary I-shaped cross-section steel beams is poor, and the flanges and webs in the compression zone are prone to instability.

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