Hinge joint reinforcement bar structure for concrete hollow slab bridge

Abstract

The invention belongs to the technical field of bridge structures, particularly relates to a hinge joint reinforcement bar structure for a concrete hollow slab bridge and mainly aims to provide a novel hinge joint reinforcement bar form of an assembled concrete slab bridge to solve the problems of insufficient anchoring length of a hinge joint tensile reinforcement bar in a hollow slab and a hinge joint by means of a novel reinforcement bar pin joint structure and to improve the tension resistance of the hinge joint. The hinge joint reinforcement bar structure for the concrete hollow slab bridge comprises hollow slab bodies and hollow slab reinforcement stirrups arranged in the hollow slab bodies, wherein a plurality of U-shaped hinge joint pin joint reinforcement bars are arranged between adjacent hollow slab bodies, a plurality of closed and annular hinge joint tensile reinforcement bars are arranged between each hinge joint pin joint reinforcement bar and each of the hollow slab reinforcement stirrups on two sides of the hinge joint pin joint reinforcement bar, and hollow slab longitudinal reinforcement bars and hinge joint longitudinal reinforcement bars are arranged between the inside of each hollow slab reinforcement stirrup and the corresponding hinge joint pin joint reinforcement bar. The construction is simple and convenient, the shear resistance and the bending resistance capability of the hinge joint connection position are effectively improved, and the service life of the bridge is prolonged.

Description

technical field [0001] The invention belongs to the technical field of bridge structures; in particular, it relates to a concrete hollow slab bridge hinge joint reinforcement structure. Background technique [0002] The prefabricated hollow slab bridge is convenient in construction, fast in construction speed, and low in cost. It is a bridge type commonly used in small and medium-span bridges in China; however, the upper structure of the hollow slab bridge is mainly composed of hollow slabs and hinge joints. It is an important component that works together as a whole; however, experiments and engineering practice have shown that the hinge joint is the first component to be damaged during the use of this type of bridge; The reinforcement has been improved many times; the mainstream form of reinforcement for the hinge joints of hollow slab bridges now is to prepare door-type steel bars at the bottom to resist the tensile force. The width of the joint is limited, and there is ...

AI Technical Summary

Problems solved by technology

[0004] The main purpose is to provide a new form of hinged steel bar for prefabricated concrete slab bridges, solve the problem of insufficient anchorage length of tensioned steel bars in the hollow slab and in the hinged joint through the new steel bar pin connection structure, and improve the hinged joint. Tensile resistance, improve the bearing capacity and service life of the hollow slab bridge structure

Images