JP4417296B2 - Beam reinforcement bracket and beam reinforcement structure - Google Patents

Description

  The present invention relates to a beam reinforcing bracket for reinforcing a through hole of a steel beam.

H-shaped steel, I-shaped steel, etc. are widely used as beams for building structures. In such beams, pipes such as air-conditioning equipment and water supply / drainage equipment provided inside the building structure are used. A through-hole may be formed.
At that time, in order to prevent a decrease in strength due to the formation of the through hole, a reinforcing metal fitting may be attached to the through hole.

As the reinforcing metal fittings, those having a plate-like shape are mainly used. Specifically, as in the conventional example of the beam reinforcing metal fitting shown in FIG. 12, a hole 87 having substantially the same diameter as the through hole 85 of the beam 83 is formed in the steel plate 81 or the like, and this is provided around the through hole 85 by welding or the like. ing. The following are known as such reinforcing metal fittings.
(Non-Patent Document 1).
Supervised by the Ministry of Construction Administration Department, Construction Steel Design Standards and Commentary (1998 Edition), Public Building Association, 1998, p. 136-138.

  However, such a beam-reinforcing metal fitting has a problem that the yield of the material is low and the cost is high because the steel plate in the hole portion cut out during production is wasted.

  The present invention has been made in view of such problems, and an object thereof is to provide a beam reinforcing bracket that can be manufactured at a low cost with a high material yield.

In order to achieve the above-described object, the present invention provides a plate-shaped beam reinforcing bracket provided around a through-hole provided in a steel beam to reinforce the steel beam, wherein a trapezoidal recess is formed on one side. A beam reinforcing bracket characterized by forming a substantially hexagonal hole made of two plate-shaped members .
The beam reinforcing bracket forms one or a plurality of substantially hexagonal holes.
The plate-like member may be formed by cutting a plate material into a continuous trapezoidal wave shape and further cutting the trapezoidal peak portion.
The two plate-like members may be divided and attached to the beam, or may be integrally molded and attached to the beam.
The beam reinforcing bracket may be attached to the beam by welding, or may be attached to the beam by bolt joining.
The beam reinforcing structure reinforces a steel beam having a beam through-hole through which a pipe passes, and the beam reinforcing bracket has a substantially hexagonal through-hole composed of two plate-like members each having a trapezoidal recess. A beam reinforcing structure, wherein the substantially hexagonal through hole of the beam reinforcing metal fitting is welded and fixed to the steel beam at a position where the substantially hexagonal through hole circumscribes the beam through hole. It is.

  According to the present invention, it is possible to provide a beam reinforcing bracket for reinforcing a through hole of a steel beam that can be manufactured at a low cost with a high material yield.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view showing a beam reinforcing bracket 1 according to this embodiment, and FIG. 2 is a plan view of FIG.

As shown in FIG.1 and FIG.2, the beam reinforcement metal fitting 1 consists of plate-shaped members 3a and 3b.
The plate-like member 3a has a U-shape formed of a main body 7a and trapezoidal portions 9a and 11a provided on the main body 7a, and the plate-like member 3b is provided on the main body 7b and the trapezoidal portion 9b provided on the main body 7b. , 11b.

As for the plate-shaped member 3a and the plate-shaped member 3b, the trapezoid part 9a and the trapezoid part 9b are joined, and the trapezoid part 11a and the trapezoid part 11b are joined.
By joining in this way, a hexagonal through-hole 5 is formed at a substantially central portion of the beam reinforcing bracket 1.
The size of the through hole 5 is the same as or slightly larger than the size with which a through hole 15 provided in a beam 13 described later is circumscribed.
The angle 12 of the through-hole 5 is set in a range of approximately 70 to 140 degrees. However, when the angle is 120 degrees (regular hexagon), the material yield is the best, and when the angle is 90 degrees, the stress transmission efficiency is the most. Is good.

  The plate members 3a and 3b are made of steel or the like.

Next, a method for attaching the beam reinforcing bracket 1 to the beam 13 will be described.
3 is a plan view showing the beam 13, and FIG. 4 is a cross-sectional view taken along line AA of FIG.
5 is a plan view showing the beam 13 to which the beam reinforcing bracket 1 is attached, and FIG. 6 is a cross-sectional view taken along the line BB in FIG. Further, FIG. 7A is a diagram showing the beam 13 through the pipe 19, and FIG. 7B is a diagram showing a state of stress transmission between the beam 13 and the beam reinforcing bracket 1.

As shown in FIGS. 3 and 4, the beam 13 is provided with a through hole 15 through which piping and the like are passed.
When attaching the beam reinforcing bracket 1 to the beam 13, as shown in FIG. 5, the beam reinforcing bracket 1 is attached to a position where the through hole 15 of the beam 13 circumscribes the through hole 5 of the beam reinforcing bracket 1, and the periphery is welded. The beam 13 and the beam reinforcing bracket 1 are fixed to the welded portion by 17.
The plate-like members 3a, 3b may be attached to the beam 13 after being integrated by welding or the like, or may be attached to the beam 13 separately.

  As shown in FIG. 6, the beam reinforcing bracket 1 is attached to both surfaces of the beam 13, but may be attached to both surfaces in this way, or may be attached only to one surface.

  As shown in FIG. 7A, a pipe 19 such as an air conditioning facility or a water supply / drainage facility is passed through the through hole 15 reinforced by the beam reinforcing bracket 1 in this way.

  FIG. 7B shows a state of stress transmission around the through-hole to which the beam reinforcing bracket 1 is attached when stress (shearing force) is applied to the beam 13, and when the shearing force Q is applied, the beam It is transmitted along the through hole 5 of the reinforcing metal fitting 1 as the axial force of D1, D2, D3, D4. Therefore, the lack of proof stress due to the through-hole 15 of the beam can be reinforced by the beam reinforcing bracket 1.

  Here, a manufacturing method of the plate-like members 3a and 3b constituting the beam reinforcing bracket 1 will be described. FIG. 8 is a diagram showing a method for manufacturing the plate-like members 3a and 3b.

As shown in FIG. 8, the material of the plate-like members 3 a and 3 b is a long plate-like plate material 21.
The plate member 21 is cut into a trapezoidal wave shape in the longitudinal direction, and is cut perpendicularly to the longitudinal direction so as to divide the trapezoidal peaks 14a, 14b, 14c, whereby a plurality of plate-like members 3a, 3b, 3c, 3d are obtained. 3e, 3f are formed.
By cutting in this way, the plate material 21 can be used with a good yield, and the length to be cut is short, so the cost is reduced.

As described above, according to the first embodiment, the beam reinforcing bracket 1 forms the substantially hexagonal through hole 5, and the plurality of plate-like members 3a and 3b constituting the beam reinforcing bracket 1 are It is formed by cutting the plate material 21 into a trapezoidal wave shape in the longitudinal direction and cutting it perpendicularly to the longitudinal direction so as to divide the trapezoidal peaks.
Therefore, the beam reinforcing bracket 1 can be manufactured at a low cost with a good material yield.

  Next, a second embodiment will be described. FIG. 9 is a plan view showing the beam 13 to which the beam reinforcing brackets 31a and 31b are attached, and FIG. 10 is a cross-sectional view taken along line EE of FIG.

  In the second embodiment, the beam reinforcing brackets 31a and 31b are fixed to the beam 13 not by welding but by bolt joining.

As shown in FIGS. 9 and 10, a plurality of bolt through holes are formed in the beam reinforcing brackets 31 a and 31 b and correspond to the bolt through holes formed in the beam reinforcing bracket around the through holes 15 of the beam 13. Bolt through holes are opened at the positions.
The beam reinforcing brackets 31a and 31b and the beam 13 are attached by screwing bolts and nuts at corresponding bolt hole positions, and are fixed to the beam 13 by fastening the bolts and nuts.

  In addition, since the structure and manufacturing method of the beam reinforcement metal fittings 31a and 31b are the same as that of 1st Embodiment except opening a bolt through-hole, description is abbreviate | omitted.

  As described above, according to the second embodiment, the beam reinforcing brackets 31a and 31b form the substantially hexagonal through hole 5, and the same effects as those of the first embodiment can be obtained.

  Furthermore, according to the second embodiment, since the beam reinforcing bracket is joined to the beam 13 with a bolt and there is no welding work, there is no problem of distortion or warpage due to welding in the beam.

  Next, a third embodiment will be described. FIG. 11 is a plan view showing a beam reinforcing bracket 51 according to the third embodiment.

  The beam reinforcing bracket 51 according to the third embodiment is obtained by forming a plurality of through holes in the beam reinforcing bracket 1 according to the first embodiment.

As shown in FIG. 11, the beam reinforcing bracket 51 is composed of plate-like members 53a and 53b.
The plate member 53a includes a main body 57a and trapezoidal portions 59a, 61a, and 63a formed on the main body 57a, and the plate member 53b includes a main body 57b and trapezoidal portions 59b, 61b, and 63b provided on the main body 57b.

In the plate-like member 53a and the plate-like member 53b, a trapezoidal portion 59a and a trapezoidal portion 59b are joined, and a trapezoidal portion 61a and a trapezoidal portion 61b, and a trapezoidal portion 63a and a trapezoidal portion 63b are joined.
By joining in this way, two substantially hexagonal through holes 55a and 55b are formed in the beam reinforcing bracket 51.

  Thus, it is good also as a structure which provides two through-holes in the beam reinforcement metal fitting 51. FIG. The number of through holes may be three or more.

Further, in the third embodiment, the attachment method to the beam 13 has been described by attachment by welding as in the first embodiment. However, as in the second embodiment, the attachment method by bolt joining may be used. Good.
Since the manufacturing method and the attachment method are the same as those in the first embodiment or the second embodiment, description thereof is omitted.

  Thus, according to the third embodiment, the beam reinforcing bracket 51 is provided with hexagonal through holes 55a and 55b. Therefore, the same effects as those of the first embodiment are obtained.

  In addition, according to the third embodiment, since the beam reinforcing bracket can be integrally formed even when the interval between adjacent through holes is narrow, the beam reinforcing bracket can be attached without interference.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

The perspective view which shows the beam reinforcement metal fitting 1 Plan view of FIG. Plan view showing beam 13 AA sectional view of FIG. The top view which shows the beam 13 which attached the beam reinforcement metal fitting 1 BB sectional view of FIG. The figure which shows the beam 13 which let the piping 19 pass The figure which shows the state of the stress transmission of the beam 13 and the beam reinforcement metal fitting 1 The figure which shows the manufacturing method of plate-shaped member 3a, 3b The top view which shows the beam 13 which attached the beam reinforcement metal fittings 31a and 31b EE sectional view of FIG. Plan view showing beam reinforcing bracket 51 Conventional example of beam reinforcing bracket

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Beam reinforcement metal fitting 3a ......... Plate-shaped member 5 ......... Through hole 7a ......... Main body 9a ......... Trapezoid part 13 ......... Beam 15 ......... Through hole 17 ......... Welding part 19 ......... Piping 21 ......... Plate material 31a ... Beam reinforcement bracket 37a ... Bolt 51 ......... Beam reinforcement bracket

Claims (8)

A plate-shaped beam reinforcing bracket provided around a through-hole provided in a steel beam to reinforce the steel beam, and having a substantially hexagonal shape composed of two plate-shaped members each having a trapezoidal recess on one side . A beam reinforcing metal fitting characterized by forming a hole.   The beam reinforcing bracket according to claim 1, wherein the beam reinforcing bracket forms one or a plurality of substantially hexagonal holes. The plate-like member is cut in a wave of consecutive plate trapezoidal, further beam reinforcement according to any one of claims 1 to 2, characterized in that it is formed by cutting the trapezoidal ridges Hardware. The beam reinforcing bracket according to any one of claims 1 to 3 , wherein the two plate-like members are each divided and attached to the beam. The beam reinforcing bracket according to any one of claims 1 to 3 , wherein the two plate-like members are integrally formed and attached to the beam. The beam reinforcing bracket according to any one of claims 1 to 5 , wherein the beam reinforcing bracket is attached to the beam by welding. The beam reinforcing bracket according to any one of claims 1 to 5 , wherein the beam reinforcing bracket is attached to the beam by bolt joining. A beam reinforcing structure for reinforcing a steel beam having a beam through hole through which a pipe passes, wherein the beam reinforcing bracket has a substantially hexagonal through hole made of two plate-like members each having a trapezoidal concave portion. The beam reinforcing structure is characterized in that the periphery of the beam reinforcing bracket is welded and fixed to the steel beam at a position where the substantially hexagonal through hole of the beam reinforcing bracket circumscribes the beam through hole.

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