Steel truss web combined PC beam and construction method thereof

Abstract

The invention discloses a steel truss web combined PC beam, comprising a reinforced concrete top plate and a reinforce concrete base plate as well as at least two lines of base steels; wherein the reinforced concrete top plate and / or reinforced concrete base plate are / is provided with a tensioned prestressing reinforcement, the base steels are discontinuously arranged along the length direction of the beam and are anchored on the reinforced concrete base plate, one end of steel truss web is fixedly connected with the base steel, the other end thereof is fixedly connected with a top steel, the top steel is formed with at least two lines of steel truss webs which are discontinuously arranged along the length direction of the beam and are anchored on the reinforce concrete top plate, each line of steel truss web is fixedly connected with base steel and top steel, so as to be in a shape that a plurality of continuous 'V' shapes are combined. The invention also discloses a construction method of the steel truss web combined PC beam. The invention makes the best of the advantages and properties of reinforced concrete and steel, dead weight is lighter, rigidity of web is high, steel is saved to the utmost extent, construction process is simple, footboard framework support is saved, and appearance is beautiful, thus having obvious economic benefit and wide application in the field of bridge construction.

Description

technical field [0001] The invention relates to a steel web PC beam and a construction method thereof, in particular to a steel truss web composite PC beam and a construction method thereof. Background technique [0002] The known prestressed reinforced concrete beam, that is, PC beam, is suitable for occasions with a small span. When the span is too large, the load on the concrete and prestressed steel bars will largely come from the self-weight of the reinforced concrete. The truss-type steel beam is suitable for occasions with large spans due to its advantages in the ratio of strength to self-weight. However, due to the lack of material properties of the steel beam itself, including the lack of high temperature resistance, the strength of the steel is almost negligible when it exceeds 600 °C; it is easy to corrode, and corrosion will cause the strength of the product to decrease and the effective cross-sectional area to decrease. The annual cost of anti-corrosion treatme...

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Problems solved by technology

[0006] The above-mentioned patents are all based on the combination of the support of space steel truss and the reinforced concrete of the roof and bottom to form a box girder. Although the deficiencies of steel truss beams and ordinary prestressed reinforced concrete beams are solved, the top and bottom slabs still have edge bars and side beams. slab, while the reinforced concrete of the top slab and bottom slab still needs to be reinforced according to the structure at least, which still causes a large waste of steel, and the weight of the side slab concrete is also large

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