Low groove-type steel and concrete composite beam

Abstract

The invention provides a low groove-type steel and concrete composite beam. The composite beam comprises at least two T-shaped steel beams and a bridge deck slab arranged on the T-shaped steel beams and perpendicularly connected with webs of the T-shaped steel beams, wherein the steel wing edges of every two adjacent T-shaped steel beams are connected, the ends of the webs of the T-shaped steel beams are of tooth structures, and the tooth structures are located in the bridge deck slab.

Description

Technical field [0001] The present disclosure relates to the field of beam bridges, in particular to a low-height channel-shaped steel-concrete composite beam. Background technique [0002] Steel-concrete composite beam refers to a beam bridge formed by combining exposed steel beams or steel truss beams with reinforced concrete bridge decks through connectors (shear keys). Common steel-concrete composite beams are composed of I-shaped steel beams and reinforced concrete slabs. For bridges with relatively large spans and wide decks, steel-concrete composite beams with box sections are mostly used. The principle of the steel-concrete composite beam used as the main steel beam of the steel truss beam is similar to the steel-concrete composite beam of the I-beam and box-shaped steel beams, but in terms of structural performance, it has greater spanning capacity and greater overall rigidity than the first two types. , Long-span highway bridges and medium-span human bridges. Connect...

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Problems solved by technology

[0003] For the cross-sections of the above-mentioned various composite beams, the upper flange of the steel beam in the mid-span area is located in the compression area in the case of pure bending, which cannot give full play to the characteristics of the steel. From an economical point of view, it is not as good as all the concrete structures.

Connectors, as the key stress-bearing components that make steel beams and concrete bridge decks a whole, need to be welded to steel beams, whether it is welding shear studs or steel connectors, the direct connection between the welds between connectors and steel girders The quality affects the stress and safety of the structure, so special welding procedure qualification tests are required, and a certain proportion of destructive tests are also required after welding, such as shear nail welding procedure qualification and post-weld bending (hammer bending 30° welding seams without cracks) tests, etc., will consume a certain amount of manpower and material resources, and may also prolong the construction progress

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