Combined beam containing perforated plate connectors and construction method of combined beam

Abstract

A combined beam containing perforated plate connectors comprises a reinforced concrete plate, steel beams and the perforated plate connectors, wherein upper-layer reinforcing steel bars and lower-layer reinforcing steel bars are arranged in the reinforced concrete plate; the horizontal positions of the lower-layer reinforcing steel bars are located and controlled by the hole pitch of the perforated plate connectors, and the vertical positions and protecting layer thickness of the lower-layer reinforcing steel bars are controlled by the height of the steel plate at the bottoms of slots; the horizontal positions of the upper-layer reinforcing steel bars are positioned and controlled by the hole pitch of the perforated plate connectors, and the vertical positions and protecting layer thickness of the upper-layer reinforcing steel bars are controlled by the distance from the tops of the perforated plate connectors to the upper surface of concrete. The perforated plate connectors are provided with boot-shaped slots. The invention further discloses a construction method of the combined beam. The combined beam has the advantages that the combined beam is convenient in construction, high in bearing capacity and good in fatigue performance, the complex procedure for welding studs or penetrating reinforcing steel bars into holes of traditional combined beams is omitted, the construction method is simplified, construction efficiency is improved, and construction cost is lowered.

Description

technical field [0001] The invention belongs to the field of bridge engineering and relates to a composite girder bridge, in particular to a composite girder bridge with a perforated plate connector. Background technique [0002] Composite girder bridge refers to a composite structure in which steel girder members and reinforced concrete are combined by connectors to form a composite section that works together. This structure has been increasingly widely used because it can effectively utilize the respective advantages of steel and concrete. [0003] The shear connectors of conventional composite beams are generally shaped steel, shear nails or conventional perforated plate connectors. Sectional steel connectors are less used at present. At present, shear nails and conventional perforated plate connectors are used more. The construction method of shear nails is relatively mature at present, and there are special construction machines. However, when there are many shear nai...

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