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Honeycomb beam

A technology of honeycomb beams and webs, applied in the direction of joists, girders, trusses, etc., to achieve the effects of uniform stress distribution, simple alignment of welding surfaces, and reduction of maximum stress values

Pending Publication Date: 2018-02-02
重庆固捷钢结构有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a honeycomb beam that can easily align the welding surface, prevent shrinkage and deformation during welding, and have a more uniform stress distribution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cellular beam such as Figure 1~2 As shown, it includes a web 1, a first flange 2 and a second flange 3, the web 1 is divided into a first web 11 and a second web 12 by a cutting line, the first web 11 and the first The flange 2 is connected, and the second web 12 is connected with the second flange 3. The first web 11 and the second web 12 are divided into a pier 4 with a wider web and a pier 4 with a narrower web by the cutting line. The bridge part 5 , the junction of the pier part 4 and the bridge part 5 is the bridge toe 8 . The cutting line bends at the center of the corresponding position between the pier portion 4 of the first web 11 and the bridge portion 5 of the second web 12 to form a raised portion 6 extending from the first web 11 to the second web 12 and The recessed part 7 on the second web 12 correspondingly cooperates with the raised part 6 , and the cutting line bends at the center of the corresponding position between the bridge part 5 of the firs...

Embodiment 2

[0027] On the basis of the solution in Embodiment 1, the raised portion 6 is divided into a terminal head 61 and a convex neck 62 , and the maximum width of the terminal head 61 is slightly larger than the width of the convex neck 62 .

[0028] Since the biggest problem in the manufacturing process of honeycomb beams is deformation, there are many factors that cause deformation, such as the quality problems of H-shaped steel itself, deformation caused by transportation, deformation caused by welding stress, etc. Among them, the deformation caused by welding stress The deformation is the most serious. The so-called welding stress is the stress generated by the components due to cutting and welding. The inhomogeneous temperature field in the cutting and welding process and the local plastic deformation caused by it and the organization with different specific volumes are the root causes of welding stress and deformation. There are six main forms of honeycomb beam welding deforma...

Embodiment 3

[0034] On the basis of any one of embodiment 1 or 2, such as Figure 5-6 As shown, the junction of the cutting line between the pier 4 and the bridge 5 on the web 1 (that is, the position of the bridge toe 8) adopts an arc segment for a smooth transition. Here, "pier portion and bridge portion" refer to adjacent pier portions and bridge portions on the same web (ie, the first web or the second web).

[0035] Since the maximum normal stress of the honeycomb beam appears at the bridge toe, in order to prevent the fatigue life of the bridge toe from being reduced due to stress concentration, this embodiment adopts an arc segment transition at the bridge toe when designing the cutting line, which is different from the traditional folding Compared with the line segment, it can effectively reduce the maximum stress value and stress concentration at the bridge toe, and the stress distribution is more uniform.

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Abstract

The invention discloses a honeycomb beam. The honeycomb beam comprises a first flange, a second flange and a web plate. The web plate is divided into a first web plate and a second web plate by a cutting line. The first web plate is connected with the first flange. The second web plate is connected with the second flange. The first web plate and the second web plate each are divided into a pier part and a bridge part by cutting lines. The cutting lines are bent at the centers of the corresponding positions of the pier part of the first web plate and the bridge part of the second web plate to form a convex part of the first web plate extending out of the second web plate and a concave part correspondingly matched with the convex part on the second web plate. The cutting lines are bent at the centers of the corresponding positions of the bridge part of the first web plate and the pier part of the second web plate to form a convex part of the first web plate extending out of the second web plate and a concave part correspondingly matched with the convex part on the second web plate. The sizes and shapes of the convex parts are the same. The honeycomb beam can be aligned with the welding surface very easily to prevent shrinkage deformation during welding, and stress distribution is more uniform.

Description

technical field [0001] The invention belongs to the technical field of building steel structures, and in particular relates to a honeycomb beam. Background technique [0002] The honeycomb beam is a new type of beam formed by cutting the H-shaped steel web according to a certain broken line or arc line and then changing the position and re-welding. The ratio of the section height of the honeycomb beam to the section design H of the original H-shaped steel is the expansion ratio. Generally between 1.2-1.7. Since the section moment of inertia and resistance moment are increased after expansion, the stiffness and strength of the beam are significantly improved. The beam can bear a larger load when the beam itself is lightened, and it can be applied to a larger span, saving steel and transportation. The installation cost has considerable economic value. The holes in the honeycomb beam web are both beautiful and convenient for laying pipelines, which can reduce the height of th...

Claims

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Application Information

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IPC IPC(8): E04C3/08
CPCE04C3/083E04C3/086
Inventor 万琴
Owner 重庆固捷钢结构有限公司
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