Novel distributed small hole groove of steel-concrete composite beam prefabricated bridge deck slab

Abstract

The invention discloses a novel distributed small-hole groove of a steel-concrete composite beam prefabricated bridge deck slab, which structurally comprises a prefabricated bridge deck slab, small-hole grooves, shear nails, epoxy mortar and rubber strips, the small-hole grooves in the prefabricated bridge deck slab are arranged at equal intervals in the bridge length direction, and a row of shear nails are arranged in the small-hole grooves; the bridge deck and the steel beams are tightly attached by arranging rubber strips and epoxy mortar, after shear nails are clamped into small hole grooves of the bridge deck, high-performance shrinkage-compensating concrete is poured into the small hole grooves so that the bridge deck and the steel beams can be permanently combined to form the composite beams, and the small hole grooves are suitable for prefabricated bridge deck steel-concrete composite beam bridges with any bridge span and any bridge width. The small hole grooves of the cluster enable the shear nails to be arranged at equal intervals in the longitudinal bridge direction, shear force transmission is even and continuous, theoretical distribution of longitudinal horizontal shear force of the composite beam is better met, then the small hole groove prefabricated bridge deck slab of the cluster is manufactured in a prefabrication factory, the prefabricated slab is a small component, prefabrication and installation are convenient, and construction quality is controllable.

Description

technical field [0001] The invention relates to the technical field of bridge design, in particular to a new type of distributed small hole groove for a steel-concrete composite beam prefabricated bridge deck. Background technique [0002] Distributed small hole slots are the general structure of Japanese composite girder bridges. Japanese composite girder bridges have advanced technology and reasonable structure. The distributed small hole slots introduced are suitable for prefabricated bridge deck steel-concrete composites with any bridge span and any bridge width. In the beam bridge, the distributed small hole slots make the shear nails arranged at equal intervals along the longitudinal bridge direction, and the shear force is transmitted evenly and continuously, which is more in line with the theoretical distribution of the longitudinal and horizontal shear force of the composite beam. Secondly, the distributed small hole slots prefabricated the bridge deck Completed in ...

AI Technical Summary

Problems solved by technology

[0003] However, there are the following deficiencies in the existing technology: At present, the prefabricated bridge decks of steel-concrete composite beams in China are mainly in the form of large-spaced holes and grooves, and the shear nails are arranged in groups of nails. The spacing is between 1.2 and 1.5m. This layout corresponds to relatively large holes in the bridge deck. A prefabricated slab generally only has two rows of large holes, and there are multiple rows of shear nails in each large hole. The advantage of this structure is that the construction is relatively It is simple, and the holes are reserved for easy operation. The disadvantage is that the arrangement of shear studs is discontinuous, which does not match the theoretical force transmission.

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