Structure for hogging moment area of steel-concrete composite continuous beam bridge

Abstract

The invention belongs to the technical field of bridges. The invention discloses a structure for a hogging moment area of a steel-concrete composite continuous beam bridge. The structure comprises a first prefabricated main beam and a second prefabricated main beam, notches are formed in opposite end parts of the first prefabricated body main beam and the second prefabricated body main beam, so that the notches of the first prefabricated body main beam and the second prefabricated body main beam are spliced to form a T-shaped joint of a vertical groove body of which the upper part is a zigzagedge and the middle lower part is a zigzag edge; the first prefabricated main beam and the second prefabricated main beam are each composed of a beam body formed by welding steel plates, the beam plates comprise I-shaped steel, bridge decks and end partition plates, the tops of the I-shaped steel are connected with the bridge decks, the bridge decks are in a step shape, and the end partition plates are welded to the junctions of the I-shaped steel and cast-in-place wet joints. The hogging moment area structure is novel in structure, convenient to construct and high in applicability, so that the cracking of concrete joints of the bridge decks in the hogging moment area is prevented, and the structural durability is improved.

Description

technical field [0001] The invention belongs to the technical field of bridges, and in particular relates to a structure for the negative moment zone of a steel-concrete composite continuous beam bridge. Background technique [0002] Under the background that the Ministry of Transport proposed to make full use of the unique performance advantages of steel structure bridges to realize the transformation and upgrading of highway structures, the form of steel-concrete composite structure bridges has been widely adopted in various provinces and cities across the country, and road construction has been optimized and improved. It has a fast and convenient construction method, has a small building height and a light and beautiful structural shape, and has great competitiveness. [0003] For multi-span bridges, the use of continuous composite beams can further reduce the beam height and have better performance. However, in the negative moment region of the continuous composite beam...

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Problems solved by technology

[0005] Therefore, the present invention needs to solve the problem of unreasonable force in the negative moment region of the existing continuous composite beam, and provide a steel-concrete composite continuous beam that meets the force requirements of the negative moment region, has simple structure, convenient construction, and strong applicability. Construction of beam bridge negative moment zone

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