Non-welding connector steel-concrete composite girder and construction method thereof

Abstract

The invention discloses a non-welding connector steel-concrete composite girder and a construction method thereof. The steel-concrete composite girder comprises multiple bridge segments, and each bridge segment comprises a steel girder structure, a steel mesh mechanism and a UHPC bridge deck arranged on the steel girder structure, wherein the steel girder structure comprises a base plate, a top plate and a web; the steel mesh mechanisms are arranged on the upper sides and the lower sides of the steel girder top plates and connected through vertical reinforcements penetrating through the steelgirder top plates, and the steel girder top plates, the steel mesh mechanisms and the vertical reinforcements are all wrapped by the UHPC bridge decks. The construction method for the construction process of each bridge segment comprises the following steps of 1, steel girder structure installation; 2, steel mesh mechanism installation; 3, UHPC bridge deck formation; 4, all construction process performing by repeating the steps from first to third multiple times. Accordingly, by means of the vertical reinforcements, shearing force between the bridge decks and the steel girder top plates is transmitted, people do not need to weld shearing force connectors to the top plates, construction is simplified, and environmental protection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a steel-concrete composite beam without welded connectors and a construction method thereof. Background technique [0002] Steel girder is a high-performance building material with high tensile and compressive strength. The compressive strength of concrete is much greater than its tensile strength, and its cost is lower than that of steel girder. Steel-concrete composite girders are equipped with concrete bridge decks on top of steel girders. , the concrete bridge deck and the steel girder are connected together by shear members to bear the force together. In the same section, the concrete bridge deck is under compression and the steel girder is under tension, which can give full play to the material properties of concrete and steel girder, and the mechanical properties are better. [0003] The traditional composite beam connects the concrete bridge deck ...

AI Technical Summary

Problems solved by technology

The number of shear parts is large, the welding workload is heavy, the quality is often difficult to guarantee, and it is not conducive to environmental protection

[0004] In traditional steel-concrete composite bridges, the bridge deck is made of ordinary concrete, whose material strength is much lower than that of steel, resulting in a thicker concrete bridge deck, which increases the weight of the structure; traditional concrete has coarse aggregate, which has poor fluidity, and the bridge deck cannot be made In order to improve the durability of the steel girder, the steel girder is wrapped in a structural form; the traditional steel-concrete composite girder deck is located on the upper surface of the steel girder roof, and the shear member transmits shear force between the top of the steel girder and the bottom of the concrete bridge deck. Uneven compression of concrete bridge decks

Images