Steel-concrete composite beam adopting corrugated steel web and construction method thereof

Abstract

The invention discloses a steel-concrete composite beam adopting a corrugated steel web, which relates to a corrugated steel web composite beam capable of being applicable to highway bridges and railway bridges. The beam comprises a top flange concrete composite plate, a corrugated steel web plate, a top flange steel plate, a box beam bottom plate and male pin connecting pieces, wherein the top flange comprises a precast concrete slab and a cast-in-place concrete layer; and the top flange concrete composite plate is connected with the top flange steel plate into a whole through the male pin connecting pieces welded on the top flange steel plate. By adopting the structure, the problems that the site workload and the construction difficulty for casting a bottom flange concrete slab of a traditional corrugated steel web composite beam are large, the construction quality is difficult to guarantee and the like are overcome on the premise that the quantity of steel is hardly increased, meanwhile, the tensile property of the steel plate is fully played, the bearing capacity, the rigidity and the cracking resistance of the structure are improved, and the durability of the structure is improved, therefore, the corrugated steel web composite beam has the advantages of simple structure, reasonable stress, quick and convenient construction, and good technical and economic benefits.

Description

technical field [0001] The invention relates to a steel-concrete laminated slab composite beam which can be applied to road bridges and railway bridges and adopts corrugated steel webs, and belongs to the technical field of bridge structures. Background technique [0002] Traditional corrugated steel web composite box girder, such as figure 1 As shown, it consists of the upper flange concrete slab (14), the lower flange concrete slab (15) and two corrugated steel webs (1), the corrugated steel webs of each leg and the upper flange steel plate (3) and the lower The steel plate (2) at the bottom of the flange is transported to the construction site for installation and positioning after being welded in the factory. When the lower flange concrete slab is poured, it is necessary to set up a full house scaffolding on site to support the formwork. There are problems such as on-site operation and construction difficulty. At the same time, the joint of the lower flange concrete sla...

AI Technical Summary

Problems solved by technology

When the lower flange concrete slab is poured, it is necessary to set up a full house scaffolding on site to support the formwork. There are problems such as on-site operation and construction difficulty. At the same time, the joint of the lower flange concrete slab and the lower flange steel plate is limited due to the narrow pouring space. Difficult to guarantee, affecting the mechanical performance of the joint

On the other hand, the lower flange concrete slab is suspended under the corrugated steel web through the stud connector (5), which is prone to premature cracking under the action of positive bending moment, thereby reducing the bearing capacity and stiffness of the structure and affecting the durability of the structure

These problems have caused certain difficulties to the popularization and application of this type of structure.

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