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Assembling and welding technique for box shape steel structure girder

A technology for structural beams and section steel, applied to truss structures, joists, girders, etc., can solve the problems of large down-deflection deformation and large down-deflection deformation, and achieve the effect of small welding error and high quality

Inactive Publication Date: 2009-07-01
JIANGXI COPPER CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0017] (2) Weld A weld seam. At this time, the rigidity of the member is relatively large, but it will cause a large downward deflection deformation (see figure 2 );
[0028] For a specific component, the position of the neutral axis determines the direction and amount of deformation after welding. The position of the neutral axis of the above three processes when welding the A weld is as follows: figure 2 As shown, it is located in the load-bearing direction of the A weld and is far away from the A weld, so the deflection deformation is relatively large

Method used

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  • Assembling and welding technique for box shape steel structure girder
  • Assembling and welding technique for box shape steel structure girder
  • Assembling and welding technique for box shape steel structure girder

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Embodiment Construction

[0045] control figure 1 , Figure 4 As can be seen, the welding process of the present invention is as follows:

[0046] (1) Assemble the upper flange 1 and the long and short ribs 4 and 5, and weld the A weld seam. At this time, because the ribs 4 and 5 are not longitudinal members, the center of the member section is at the center of the upper flange 1, and the weld seam A is above the center of the section, so there is an upward arching deformation after welding, but the deformation value is not large;

[0047] (2), assembly web 2, 3;

[0048] (3), put down the component welding C weld;

[0049] (4), turn over, weld the B weld seam, there is no downward deflection after welding;

[0050] (5), assemble and weld the lower wing plate 6, and close the box girder.

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Abstract

The invention provides a welding process for box type steel structure beam, including assembling a upper wing board 1 and a long and a short reinforcing plate 4, 5, welding a welding line A, assembling ventral boards 2, 3, laying members and welding a welding line C, turning over, welding a welding line B, assembling and welding a lower wing board 6, enclosing the box type beam. The process is in accordance with technical requirement of steel structure beam, without downwarping generated after welding, but with slightly upwarping.

Description

technical field [0001] The invention relates to an assembly and welding process of a box-shaped steel structure beam, belonging to the technical field of assembly and welding of load-bearing steel structure beams. Background technique [0002] People call the box-shaped beam a box-shaped beam. This kind of steel structure beam is widely used. The main technical requirement is that the beam body must have a certain degree of camber after welding, and no downward deflection is allowed. However, most of the welds are arranged on the top of the box girder (there are large and small ribs welded on the upper flange), so the beam body is prone to downward deflection after welding. To solve this problem, in addition to using the anti-deformation method (that is, cutting the web into a shape with an arch), it is more critical to choose a reasonable assembly welding sequence. There are mainly three kinds of assembly welding process methods currently used: [0003] The first process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/04
Inventor 黄初皓
Owner JIANGXI COPPER CORP
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