Double corrugated web plate steel box girder

Abstract

The invention belongs to the technical field of building materials and in particular relates to a double undulated web slab steel box girder. The cross-section fracture shape is composed of a middle web slab, an upper flange and a lower flange which are integrated, wherein the upper flange is parallel to the lower flange, a double web slab is vertically located between the upper flange and the lower flange, the double web slab is arranged symmetrically and takes a honeycomb structure, the web slab and the flange slabs adopt one side fillet weld to connect, the web slab is an undulated web slab whose length direction are periodically repeated evenly or unevenly, and the undulated cross section takes circular arc angle trapezoid and sinusoidal curve. The product can replace products such as normal welded box steel girders, hot rolled H-shaped steel, I-shaped steel and the like, has wider usage compared with the products, and can realize maximization and can be used in the special fields and special places including the building of bridges with large spans, the manufacture of ships and the like.

Description

technical field [0001] The invention belongs to the technical field of building profiles, in particular to a double corrugated web steel box girder. Background technique [0002] Similar building structural components that can be used in similar fields include hot-rolled I-beams, hot-rolled H-beams, hot-rolled square steel pipes, welded H-beams, welded box girders, and corrugated web H-beams. [0003] Among them, hot-rolled I-beams, hot-rolled H-beams, hot-rolled square steel pipes, welded H-beams, etc. use flat steel plates as flat webs, and the flat steel plate itself has poor stability, so its shear bearing capacity is low, so It is necessary to increase the thickness of the web to obtain a higher bearing capacity, resulting in an excessive amount of steel used for the web, resulting in waste of steel. [0004] The welded steel box girder is welded by four steel plates, two of which are used as the web, placed in parallel, and the two flange plates are perpendicular to t...

AI Technical Summary

Problems solved by technology

However, since its section is still open, the lateral deformation capacity and overall torsional resistance of the component have not been significantly improved.

[0007] my country's current steel structure code (GB50017-2003) has strict regulations on the web height-thickness ratio of welded H-shaped steel and welded steel box girders. When it exceeds a certain limit, certain methods such as welding stiffeners must be used to strengthen the web , which will increase the processing workload, and the welding process will also cause adverse effects such as stress concentration, and it is difficult to realize automatic production

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