Structure of alternative folding flange type steel plate shear key and construction method thereof

Abstract

Provided are a structure of an alternative folding flange type steel plate shear key and a construction method thereof. The steel plate shear key includes a ribbed plate which has semicircular holes,trapezoidal flange plates alternatively folding, and semicircular end plates. The semicircular hole is internally provided with a horizontal through rebar. A vertical bending rebar is arranged among the flange plates. An upper concrete panel is poured on a steel beam top plate, and the upper concrete panel completely covers the steel plate shear key. The construction method comprises the followingsteps: cutting and forming steel plates used in the shear key, alternatively folding the trapezoidal flange plates and the end plates, welding the ribbed plate integrally with the steel beam top plate, placing the horizontal through rebars and the vertical bending rebar, binding the structure using a reinforcing mesh, pouring the upper concrete panel and normally maintaining to set time, dismounting a formwork. The alternative folding flange type steel plate shear key is welded integrally with a steel beam, cooperative work of upper concrete and a lower steel beam is realized. The structure is advantaged by simple structure, convenient and fast construction, and little steel material waste, and is beneficial for popularization and application of a steel-concrete combined bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and steel-concrete composite structures, and in particular relates to a structure and a construction method of an alternately folded flange-shaped steel plate shear key. Background technique [0002] The steel-concrete composite structure uses steel and concrete as the main building materials, and works together through bonding, mechanical occlusion, and connectors to give full play to the advantages of the properties of the two materials. In steel-concrete composite bridges, the shear key is the key to ensure the cooperation between steel and concrete, which not only bears the shear force of the joint surface of steel and concrete, but also bears the pulling force. There are various forms of shear keys, which can be divided into two types according to the deformation capacity: flexible shear keys (mainly studs) and rigid shear keys (mainly perforated steel plates). Existing shear key ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a structure and construction method of an alternately turned flange-type steel plate shear key, which overcomes the shortcomings of the traditional shear key in the background technology, and the shear key ensures that the steel beam and concrete The space between the flanges has sufficient shear strength, and the structure of the alternately folded flanges improves the pull-out performance between the steel beam and the concrete. It is difficult to penetrate the round hole from the side, and it has the advantages of simple structure, convenient and quick construction, and less waste of steel

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