Open steel tube and reinforced-concrete combined girder bridge structure

Abstract

The invention discloses an open steel tube and reinforced-concrete combined girder bridge structure. The structure comprises a concrete bridge deck slab, opening steel tube connecting pieces and multiple steel girders, each steel girder is provided with multiple steel tube connecting pieces, the concrete bridge deck slab is used for being erected on the steel girders, and the concrete bridge deck slab is provided with concrete pouring grooves matched with the steel tube connecting pieces and used for pouring concrete. The open steel tube and reinforced-concrete combined girder bridge structure is simple in structure, reasonable in design and convenient to construct. The structure has the advantages that the opening steel tube connecting pieces are simple in structure, convenient to manufacture and rapid to construct; by means of the opening steel tube connecting pieces, connection strength of the steel girders and the concrete bridge deck slab is increased, bearing areas of the connecting pieces are increased, and compared with bolt / screw connecting pieces, stress concentration can be effectively reduced; meanwhile, a single opening steel tube connecting piece is high in shear capacity, under the same situation, compared with the bolt / screw connecting pieces, a small number of opening steel tube connecting pieces are arranged, construction space is effectively saved, and it is beneficial to play the combination role of the concrete bridge deck slab and the steel girders.

Description

technical field [0001] The invention relates to the field of steel-concrete composite structures in roads and bridges, in particular to a steel-concrete composite beam bridge structure with openings. Background technique [0002] The shear connector is a key component for combining the steel girder and the concrete bridge deck, and it is also a key component for ensuring the combination effect of the two materials. The application in engineering also requires that the shear connector should be easy to install, fast in construction and reasonable in cost. At present, a large number of widely used shear connectors are headed studs and perforated steel plates, and occasionally some side channel steel or bent steel bars can be seen as shear connectors. A disadvantage of conventional headed studs is the low load-carrying capacity of the individual shear connections. In order to realize the complete shear connection, a large number of shear connectors are required, and sometimes...

AI Technical Summary

Problems solved by technology

A disadvantage of common headed studs is the low capacity of the individual shear connections

In order to realize the complete shear connection, a large number of shear connectors are required, and sometimes all the studs cannot be set in the member due to the huge number, only a part of the shear connection can be formed, and the result will lead to the failure of the composite beam. The combination effect is reduced, and the bearing capacity and rigidity are reduced. In addition, the preparation process and construction process of the studs are also relatively complicated. Using a special portable welding gun

But often in actual engineering, the quality of shear connectors cannot be guaranteed

Finally, due to the excessive number of shear connectors, it will not only increase the difficulty of laying steel bars in the concrete slab, but also may cause the problem of "fighting" of components, which will bring inconvenience to the construction

The open-hole steel plate connector has good fatigue resistance, but the open-hole steel plate connector needs to wear reinforcement in the hole, and has high requirements for the density of the poured concrete, which brings great inconvenience to the construction

[0003] At present, the commonly used stud shear connectors have a low single bearing capacity. In order to give full play to the shear connection effect of the studs, the welding process requirements are relatively high, and most of them are equipped with porcelain collars.

At the same time, in practical engineering applications, there are often problems such as stud tilting, bending, member fighting and reduction of the number of studs, and the construction quality cannot be guaranteed.

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