Multi-flange steel beam butt joint dislocation welding structure

Abstract

The utility model provides a butt-joint staggered welding structure of a multi-flange steel beam, an outer contour formed by an upper flange, a middle flange and a lower flange of the multi-flange steel beam is in a parallelogram shape, and a web plate and the middle flange are equal in length; the structural forms of every two adjacent multi-flange steel beams are the same, at the butt joint position, web welding seams between webs penetrate through middle welding seams between the webs and middle flanges of the multi-flange steel beams on the two sides, upper welding seams between the short upper flanges and the webs and lower welding seams between the short lower flanges and the webs are located on the two sides of the web welding seams respectively, and the distance between the upper welding seams and the lower welding seams is equal to that between the web welding seams. And the web welding seams are connected through upper transition welding seams and lower transition welding seams, so that a staggered welding structure is formed. According to the utility model, the factory processing and manufacturing of the multi-flange steel beam and the guarantee of the welding seam quality of on-site splicing are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to a multi-flange steel beam butt-jointed staggered welding structure. Background Art

[0002] During the construction of bridges, many types of bridge cross-sections are formed. The cross-section plate thickness and span of bridge steel components are large, which brings welding technical problems to the splicing of components in factories and on-site. Traditional steel beam splicing has shortcomings such as large welding deformation, difficulty in correction, and stress concentration, especially on-site high-altitude steel beam splicing, which has hidden dangers in weld quality. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes a multi-flange steel beam butt-jointed staggered welding structure, which is beneficial to the factory processing and manufacturing of the multi-flange steel beam and the guarantee of the weld quality of on-site splicing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A multi-flange steel beam butt-jointed staggered welding structure, the structural features of which are:

[0006] It is composed of an upper flange, a middle flange, a lower flange and a web. The upper flange, the middle flange and the lower flange are of equal width, parallel to each other and arranged horizontally. The web is vertical and arranged in the middle between the upper flange and the lower flange along the width direction of the flange. The middle flange is arranged in the middle between the upper flange and the lower flange along the height direction. It is divided into two parts at the web and is formed by splicing the left flange plate and the right flange plate located on the left and right sides of the web. The outer contour formed by the upper flange, the middle flange and the lower flange is in the shape of a parallelogram, and the web is of equal length to the middle flange.

[0007] The structural form of two adjacent multi-flange steel beams is the same. At the butt joint, the webs are welded together by a penetration weld to form a vertical web weld. The multi-flange steel beam on the side with a shorter upper flange is welded together by a penetration weld between the upper flange and the corresponding web to form an upper weld. The multi-flange steel beam with a shorter lower flange is welded together by a penetration weld between the lower flange and the corresponding web to form a lower weld. At the web splicing, the web and the middle flanges of the multi-flange steel beams on both sides are welded together by a penetration weld to form a middle weld.

[0008] The web weld passes through the middle weld; with the web weld as the boundary, the upper weld and the lower weld are located on both sides of the web weld in the horizontal direction, and the horizontal spacing from the web weld is equal. The upper weld and the web weld are connected by the upper transition weld, and the lower weld and the web weld are connected by the lower transition weld.

[0009] The structural features of the utility model also lie in:

[0010] The multi-flange steel beam on the side with a longer upper flange is welded to the corresponding web by a through-weld method to form the upper transition weld; the multi-flange steel beam on the side with a longer lower flange is welded to the corresponding web by a through-weld method to form the lower transition weld.

[0011] The horizontal distance between the upper weld and the lower weld and the web weld is 150-200mm.

[0012] Weld arc starting plates are provided at both ends of the molten weld.

[0013] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0014] The utility model aims at the welding process of factory processing and on-site splicing of multi-flange steel beams for bridges. The splicing positions between the upper flanges and the lower flanges of two adjacent multi-flange steel beams are staggered along the length direction of the beam. At the same time, a web weld for vertical splicing between the webs is arranged, so that the web weld passes through the middle weld, is connected with the upper weld at the upper flange through the upper transition weld, and is connected with the lower weld at the lower flange through the lower transition weld, together forming a butt-jointed staggered welding structure. A new welding method is provided, which can effectively eliminate the quality problems of large welding heat elimination deformation and weld stress concentration in the process of thick plate welding, and provides a strong guarantee for the quality of welds processed and manufactured in the factory and on-site splicing of multi-flange steel beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the joint between two adjacent multi-flange steel beams;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of a single-section multi-flange steel beam.

[0017] In the figure, 1 is the upper flange; 2 is the middle flange; 21 is the left flange plate; 22 is the right flange plate; 3 is the lower flange; 4 is the web; 5 is the web weld; 6 is the upper weld; 7 is the lower weld; 8 is the middle weld; 9 is the upper transition weld; 10 is the lower transition weld; 11 is the weld arc starting plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Please refer to Figure 1 to Figure 2The multi-flange steel beam butt-jointed staggered welding structure of this embodiment is arranged as follows:

[0020] It is composed of an upper flange 1, an intermediate flange 2, a lower flange 3, and a web 4. The upper flange 1, the intermediate flange 2, and the lower flange 3 are of equal width, parallel to each other, and arranged horizontally. The web 4 is vertically arranged and arranged between the upper flange 1 and the lower flange 3 in the center along the flange width direction. The intermediate flange 2 is arranged between the upper flange 1 and the lower flange 3 in the center along the height direction. It is divided into two parts at the web 4 and is formed by splicing a left flange plate 21 and a right flange plate 22 located on the left and right sides of the web 4. The outer contour formed by the upper flange 1, the intermediate flange 2, and the lower flange 3 is in a parallelogram shape, and the web 4 is of equal length to the intermediate flange 2.

[0021] The structural form of two adjacent multi-flange steel beams is the same. At the butt joint, the webs 4 are welded together by a penetration weld to form a vertical web weld 5. The multi-flange steel beam on the side with a shorter upper flange 1 is welded together by a penetration weld between the upper flange 1 and the corresponding web 4 to form an upper weld 6. The multi-flange steel beam with a shorter lower flange 3 is welded together by a penetration weld between the lower flange 3 and the corresponding web 4 to form a lower weld 7. At the splicing of the webs 4, the webs 4 and the middle flanges 2 of the multi-flange steel beams on both sides are welded together by a penetration weld to form a middle weld 8.

[0022] The web weld 5 passes through the middle weld 8; with the web weld 5 as the boundary, the upper weld 6 and the lower weld 7 are located on both sides of the web weld 5 in the horizontal direction, and the horizontal spacing from the web weld 5 is equal. The upper weld 6 and the web weld 5 are connected by the upper transition weld 9, and the lower weld 7 and the web weld 5 are connected by the lower transition weld 10.

[0023] In the specific implementation, the corresponding structural settings also include:

[0024] The multi-flange steel beam on the side with the longer upper flange 1 is welded to the corresponding web 4 by a through-weld method to form an upper transition weld 9; the multi-flange steel beam on the side with the longer lower flange 3 is welded to the corresponding web 4 by a through-weld method to form a lower transition weld 10.

[0025] The horizontal spacing between the upper weld 6 and the lower weld 7 and the web weld 5 is 150-200 mm.

[0026] Weld arc starting plates 11 are provided at both ends of the molten weld.

[0027] In each section of the multi-flange steel beam, the upper flange 1 and the web 4, the middle flange 2 and the web 4, and the lower flange 3 and the web 4 are respectively connected by welding in the form of penetration welds.

[0028] Figure 2The structural form of the butt joint of two adjacent multi-flange steel beams is shown. It can be seen that since the outer contour formed by the upper flange 1, the middle flange 2, and the lower flange 3 is in the shape of a parallelogram, the web 4 is of equal length to the middle flange 2, and the outer dimensions of each multi-flange steel beam are the same, at the butt joint, the outer edges of the two multi-flange steel beams along the length direction can just fit together, and the upper flange 1 of the multi-flange steel beam on one side is short and the lower flange 3 is long, and the upper flange 1 of the multi-flange steel beam on the other side is long and the lower flange 3 is short, and the joint of the web 4 coincides with the joint of the middle flange 2, forming a butt joint staggered welding structure.

[0029] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-flange steel beam butt-jointed staggered welding structure, characterized by: It is composed of an upper flange, a middle flange, a lower flange and a web. The upper flange, the middle flange and the lower flange are of equal width, parallel to each other and arranged horizontally. The web is vertical and arranged in the middle between the upper flange and the lower flange along the width direction of the flange. The middle flange is arranged in the middle between the upper flange and the lower flange along the height direction. It is divided into two parts at the web and is formed by splicing the left flange plate and the right flange plate located on the left and right sides of the web. The outer contour formed by the upper flange, the middle flange and the lower flange is in the shape of a parallelogram, and the web is of equal length to the middle flange. The structural form of two adjacent multi-flange steel beams is the same. At the butt joint, the webs are welded together by a penetration weld to form a vertical web weld. The multi-flange steel beam on the side with a shorter upper flange is welded together by a penetration weld between the upper flange and the corresponding web to form an upper weld. The multi-flange steel beam with a shorter lower flange is welded together by a penetration weld between the lower flange and the corresponding web to form a lower weld. At the web splicing, the web and the middle flanges of the multi-flange steel beams on both sides are welded together by a penetration weld to form a middle weld. The web weld passes through the middle weld; with the web weld as the boundary, the upper weld and the lower weld are located on both sides of the web weld in the horizontal direction, and the horizontal spacing from the web weld is equal. The upper weld and the web weld are connected by the upper transition weld, and the lower weld and the web weld are connected by the lower transition weld.

2. The multi-flange steel beam butt-jointed staggered welding structure according to claim 1 is characterized in that: The multi-flange steel beam on the side with a longer upper flange is welded to the corresponding web by a through-weld method to form the upper transition weld; the multi-flange steel beam on the side with a longer lower flange is welded to the corresponding web by a through-weld method to form the lower transition weld.

3. The multi-flange steel beam butt-jointed staggered welding structure according to claim 1 is characterized in that: The horizontal distance between the upper weld and the lower weld and the web weld is 150-200mm.

4. The multi-flange steel beam butt-jointed staggered welding structure according to claim 1 is characterized in that: Weld arc starting plates are provided at both ends of the molten weld.

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