Multi-layer concrete slab composite beam with shear stud group and design method of shear stud

Abstract

The invention discloses a multilayer concrete slab combination beam with a shear concrete stud cluster and a shear concrete stud design method and relates to the field of bridge engineering building construction. The multilayer concrete slab combination beam with the shear concrete stud cluster comprises at least two layers of concrete slabs arranged in a stacked manner, and at least one steel beam. Each steel beam comprises a top flange supporting the bottom of the corresponding concrete slab. Meanwhile, the shear concrete stud cluster comprises multiple sets of shear concrete studs, the concrete slab on each layer is provided with one set of shear concrete studs, each shear concrete stud comprises a stud head and a stud body, the stud heads of the shear concrete studs in the same set are all embedded in the concrete slab of the corresponding layer, the stud bodies of the shear concrete studs in each set are all connected to the corresponding top flange, and the structures of the shear concrete studs in the same set are the same. The distance between the stud heads of the shear concrete studs in each set and the bottom face of the corresponding concrete slab where the stud heads are embedded is smaller than 2 / 3 of the thickness of the corresponding concrete slab. By the adoption of the multilayer concrete slab combination beam, the key problem about stress of a double-layer or multilayer concrete slab combination beam is solved.

Description

technical field [0001] The invention relates to the field of bridge engineering construction, in particular to a multi-layer concrete slab composite beam with a shear nail group and a design method for the shear nail. Background technique [0002] The steel-concrete composite beam is a structure composed of steel beams and reinforced concrete slabs through shear studs. For conventional steel-concrete composite beams, the bridge deck is prefabricated as a whole, and combined after the overall prefabrication is adopted. Due to the limitation of hoisting weight, the bridge deck and steel girders are hoisted separately, which increases the number of hoistings and increases the workload of on-site construction. The risks of water pollution, air pollution and solid waste pollution have been seriously affected by urban traffic. [0003] Due to the continuous increase of traffic volume and heavy vehicles, coupled with the impact of the environment, the conventional steel-concrete c...

AI Technical Summary

Problems solved by technology

For conventional steel-concrete composite beams, the bridge deck is prefabricated as a whole, and combined after the overall prefabrication is adopted. Due to the limitation of hoisting weight, the bridge deck and steel girders are hoisted separately, which increases the number of hoistings and increases the workload of on-site construction. Risks of water pollution, air pollution and solid waste pollution, seriously affecting urban traffic

[0003] Due to the continuous increase of traffic volume and heavy vehicles, coupled with the impact of the environment, the conventional steel-concrete composite beams have longitudinal cracking of reinforced concrete wing plates, transverse cracking of reinforced concrete bridge decks, partial cracking or corrosion of bridge decks, etc. Corrosion of steel beams and other problems seriously affect the service life of bridges

Moreover, when the steel-concrete composite girder deck is under the force of the transverse cantilever, the anti-lifting capacity cannot meet the force requirements, and the bridge deck constructed in advance is very easy to be lifted and damaged

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