Shear connecting piece for corrugated steel web-concrete combined box girder bridge structure

Abstract

The invention relates to a shear connecting piece for a corrugated steel web-concrete combined box girder bridge structure, and belongs to the field of bridge construction. In the shear connecting piece structure, a third limb plate and a fourth limb plate are welded to form a vertical plate, a first limb plate and a second limb plate are respectively and vertically welded to the middle positions of the left end face and the right end face of the vertical plate respectively, the first limb plate and the second limb plate are aligned left and right, the shear connection pieces are in a cross shape; the middle positions of the outer sides of the first limb plate, the second limb plate, the third limb plate and the fourth limb plate are respectively provided with an opening hole used for penetrating the steel bars. According to the cross-shaped shear connection piece structure, the transverse shear resistance is improved through the arrangement of the first and second limb plates, the longitudinal shearing resistance requirement is guaranteed by the third limb plate and the fourth limb plate, so that the shearing resistance and the applicability of the connecting part of the steel-concrete combined box girder bridge are met; in addition, the cross-shaped shear connector further has the advantages of being simple in structure, saving in materials, easy to weld and construct, small in welding amount and capable of saving manufacturing cost.

Description

technical field [0001] The invention belongs to the field of bridge construction and relates to a shear force connector for a corrugated steel web-concrete composite box girder bridge structure. Background technique [0002] In the bridge structure, the corrugated steel web-concrete composite box girder structure uses the corrugated steel plate as the web, and the steel web is connected with the concrete top and bottom plates. Collaboration between concrete elements. Therefore, in this steel-concrete composite structure, the shear connector is particularly important, which is directly related to the bearing capacity of the entire box girder structure. [0003] In the development process of shear connectors for box girder structures, in the early 1950s, spiral reinforcement and bending reinforcement connectors were mainly used, and later they were gradually replaced by stud connectors. In the 1980s, PBL connectors changed the dominant position of stud connectors. In recent ...

AI Technical Summary

Problems solved by technology

In the 1980s, PBL connectors changed the dominant position of stud connectors. In recent years, the structural forms of shear connectors have gradually diversified, such as inverted "L" shear connectors and "U" grooves that appeared abroad. Shear connectors, etc., but some steel shear connectors have problems such as excessive rigidity, high cost and difficult construction

The contact surface of the inverted "L"-shaped shear connector is too small, the bearing capacity is poor, and it is not easy to operate during welding, while the contact surface of the "U"-shaped groove shear connector is too large, the welding workload is large, the stiffness is too large, and it is easy to operate. brittle failure

[0004] From a mechanical point of view, the existing shear connectors mainly consider the longitudinal shear problem between the corrugated steel web and concrete in the box girder structure, because the web stiffness of the corrugated steel web-concrete composite box girder is far The stiffness of the web of the ordinary concrete box girder is much smaller than that of the ordinary concrete box girder, and the space effect is obvious, and the problem of transverse shear at the joint of the corrugated steel web-concrete composite box girder has not been considered in the traditional shear connectors

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