Combined truss node structure, bridge and construction method

Abstract

The invention provides a combined truss node structure, a bridge and a construction method, and relates to the technical field of bridge engineering. According to the method, aiming at the problem that a combined node position of a steel web member and a concrete inner chord member at a node position is easy to damage at present, arrangement of shear keys in a node structure is reduced through an integrated node; wherein through hole structures reserved on the joints are combined with steel bars to connect a bridge steel bar framework structure on one hand, and a pin structure is formed by concrete filled with the through holes on the other hand, so that the connection strength of the joints and a bridge concrete main body structure is improved; The structure comprises an integrated node, wherein the node comprises a chord member and a web member of which the end part is butted with the chord member; the chord member is circumferentially coated with a concrete layer, and the chord member is connected with a shear nail embedded in the concrete layer; a plurality of first through holes perpendicular to the axial direction of the chord members are formed in the positions, connected with the chord members, of the chord members and the web members, and the first through holes are matched with first steel bars penetrating through the joints and embedded in the concrete layer; the chord member is also provided with a second through hole, wherein the axis of the second through hole is vertical to the axis of the first through hole.

Description

technical field [0001] The present disclosure relates to the technical field of bridge engineering, in particular to a composite truss node structure, a bridge and a construction method. Background technique [0002] The steel-concrete composite truss structure is a new type of long-span structure. The steel truss is under tension and the concrete is under compression. These two materials play their own advantages and cooperate perfectly, which improves the shortcomings of the traditional truss structure and can be better applied in large In the construction of highway or railway bridges with a large span, it saves the amount of steel while ensuring the bearing capacity with significant advantages, and improves the spanning capacity of the truss bridge. [0003] However, due to the differences in the stress and deformation properties of concrete and steel, the mechanical properties and stress state of the combined joints of steel web members and concrete inner chords are mor...

AI Technical Summary

Problems solved by technology

[0003] However, due to the difference in stress and deformation properties between concrete and steel, the mechanical properties and stress state of the combined joints of steel web members and concrete inner chords are more complicated, resulting in the gusset plate being easily damaged

At present, in order to maintain the mechanical performance of the structure, many shear keys are arranged in the joint structure of the steel-concrete truss, which makes it difficult to connect the steel web member and the concrete chord member of the roof and floor

At the same time, the assembly of more parts not only increases the workload of node structure processing, but also increases the difficulty of controlling the installation accuracy of the entire node, which pushes up the construction cost and affects the economic effect.

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