Prefabricated steel-concrete combination T beam with corrugated steel web and construction method

Abstract

The invention discloses a prefabricated steel-concrete combination T beam with a corrugated steel web and a construction method. A plurality of prefabricated steel-concrete combination T beam section units (4) formed by combination of H-shaped wave-shaped steel web steel beams (1) and concrete bridge face plates (3) are included. Adjacent combination T beam section units (4) form a whole through a longitudinal connecting section (5) and a beam end wet joint horizontal beam (11). The advantages of a traditional steel-concrete combination beam structure with a flat steel plate are achieved, the stability of the web and be improved, influence of concrete shrinkage and creep is avoided, meanwhile, the shortcoming of a current construction method of the steel-concrete combination beam can be effectively overcome, and the prefabricated steel-concrete combination T beam has the advantages of being convenient to convey, easy to assemble, small in site welding amount, small in concrete placing amount, high in construction speed, small in influence on ground traffic and the like.

Description

technical field [0001] The invention belongs to the technical field of bridges for highways and urban roads, and mainly relates to a prefabricated steel-concrete composite T-beam using corrugated steel webs and a construction method. Background technique [0002] The I-shaped fully welded steel girder is light in weight and has a large bearing capacity. The composite beam composed of the concrete bridge deck is widely used in highways and urban bridges. However, the web of this I-shaped steel girder has long been made of flat steel plates. The welding between flat steel plates is relatively simple; the disadvantage is that the welding residual stress of flat steel plates is large, more stiffeners are needed to improve the stability of the web, the prestressing efficiency is low, and the shrinkage and creep of the concrete bridge deck will cause additional damage to the steel girders. With additional stress, the concrete at the fulcrum position is easy to crack. [0003] At ...

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Problems solved by technology

[0002] The I-shaped fully welded steel girder is light in weight and has a large bearing capacity. The composite beam composed of the concrete bridge deck is widely used in highways and urban bridges. However, the web of this I-shaped steel girder has long been made of flat steel plates. The welding between flat steel plates is relatively simple; the disadvantage is that the welding residual stress of flat steel plates is large, more stiffeners are needed to improve the stability of the web, the prestressing efficiency is low, and the shrinkage and creep of the concrete bridge deck will cause additional damage to the steel girders. Additional stress, the concrete at the fulcrum position is easy to crack

[0003] At present, there are two main construction methods for steel-concrete composite beams. One is the whole hole frame method, which has the advantage of fast construction speed. The disadvantage is that the beam length is between 25m and 40m, and the transportation is difficult. Stability problems are prone to occur during the erection process, and there are few practical applications; the other is the full-house support method, which is to erect scaffolding for support at certain intervals to form an operating platform, and then install steel beams on the supports and perform welding. Then pour the concrete roof. The advantage of this method is that it does not require large-scale hoisting equipment, and small sections of steel beams are welded and matched on the brackets, which solves the problem of long beam transportation. The disadvantages are that the construction period is long, the amount of welding on site is large, and the full range of brackets affects ground traffic and traffic. Surroundings

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