Method for manufacturing and welding wave web box type section beam and diaphragms

Abstract

The invention provides a method for manufacturing and welding a wave web box type section beam and diaphragms. According to the method, existing I-shaped wave web manufacture process and production equipment thereof are adopted, firstly, two I-shaped wave webs are formed through machining, and are connected through bevel butt welding of flat flange plates to form the wave web box type section beam; through a melting mouth electroslag welding method, stiffening ribs pre-welded on the I-shaped wave webs are connected to form the transverse diaphragms. The method is simple and convenient in technology, and strong in operability; as the existing I-shaped wave web manufacture method is integrated, the production cost is greatly reduced; for a web, the double wave can increase area of the web, so that the problem of insufficient shearing strength of the I-shaped wave webs caused by limited rolling capacities of wave webs is solved, and the section forms of the wave webs are enriched, an application range of the wave webs is expanded, and steel materials can be remarkably saved after the method is popularized and applied to beam structures with larger load.

Description

technical field [0001] The invention relates to a method for welding a corrugated web box-shaped section beam and a partition plate, and belongs to the technical field of structural engineering. technical background [0002] The corrugated web I-shaped member is an improved form of the ordinary flat web I-shaped member. It is composed of a roll-formed wave-shaped web and a flat flange plate through high-frequency continuous welding. As a new type of high-efficiency profile, the corrugated web I-shaped member has the following characteristics: (1) The corrugated web has extremely small compressive stiffness along the wave direction, hardly bears normal stress along the longitudinal direction of the member, and will not buckling occurs under a vertical load; (2) The shear local buckling load of the corrugated plate formed by rolling of the flat web is dozens of times higher than that of the original flat web; (3) The corrugated plate greatly improves the out-of-plane Rigidity...

AI Technical Summary

Problems solved by technology

Although there are relatively mature manufacturing methods for box-section beams with flat webs, they are not suitable for box-section beams with corrugated webs. The reasons are: (1) The web and flange of flat-web steel box girders are It is required to adopt full penetration groove or partial penetration groove welding connection, but the welding trajectory of corrugated web box girder is sinusoidal wave shape, it is difficult to process welding groove, and fillet weld connection is generally used; ( 2) In order to ensure the connection strength requirements, the corrugated web with a thickness exceeding 4mm should be connected with the flat flange through double-sided fillet welds. It will greatly increase the cost and workload, and it is difficult to guarantee the welding quality

In addition, in order to meet the stress and structural requirements, a corrugated web box section beam needs to be equipped with several diaphragms, and there is no reasonable processing technology for corrugated web box section beam diaphragms at present.

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