JP7256035B2 - Beam reinforcement structure and beam reinforcement method using beam reinforcement fittings - Google Patents

Description

The present invention relates to a beam reinforcing structure, a beam reinforcing method, and a beam reinforcing metal fitting manufacturing method using a beam reinforcing metal fitting for reinforcing a beam having through-holes in a building structure.

Conventionally, through-holes are sometimes formed in beams of building structures for the passage of pipes and wiring. In this case, the through holes reduce the bending resistance of the beam. In order to prevent this deterioration of the bending strength of the beams, beam reinforcing metal fittings are attached to the beams to reinforce the beams.

As such a beam reinforcing metal fitting, for example, there is a beam reinforcing metal fitting which is a ring-shaped member and is joined to a through hole formed in a beam (for example, Patent Document 1).

JP 2009-167615 A

However, if an attempt is made to ensure the bending strength of the beam only with the ring-shaped beam reinforcing metal fittings as in Patent Document 1, a large beam reinforcing metal fitting may be required. If the size of the beam reinforcing metal fitting is increased, the weight of the metal fitting will increase, resulting in poor handleability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a beam reinforcing structure, a beam reinforcing method, and a method of manufacturing a beam reinforcing metal fitting that can efficiently reinforce a beam.

In order to achieve the above object, a first invention is a beam reinforcing structure using a beam reinforcing metal fitting, comprising: a beam having a through hole formed in a web; and a periphery or edge of the through hole, A pair of first beam reinforcing metal fittings fixed facing each other in the vertical direction perpendicular to the longitudinal direction of the beam, and a pair of second beam reinforcing metal fittings fixed near the flanges of the beams above and below the first beam reinforcing metal fittings. , wherein the first beam reinforcing metal fitting and the second beam reinforcing metal fitting are formed by dividing a cylindrical beam reinforcing metal fitting material in the circumferential direction. It is a reinforcing structure.

It is desirable that the length of the second beam reinforcing metal fitting is equal to or less than the length of the first beam reinforcing metal fitting.

According to the first invention, since the through-hole efficiently reinforces the portion where the strength is the lowest, a large-sized beam reinforcing metal fitting is not required. More specifically, the first and second beam reinforcing fittings are used together to reinforce the center of the through-hole, which has the smallest cross-sectional area in the cross section perpendicular to the longitudinal direction of the beam. As compared with the reinforcement by only the ring-shaped beam reinforcing metal fittings, the beam reinforcing metal fittings can be efficiently reinforced, and the total weight of the beam reinforcing metal fittings can be reduced. Further, since the first beam reinforcing metal fitting and the second beam reinforcing metal fitting are formed by dividing the tubular beam reinforcing metal fitting material in the circumferential direction, the manufacturability is good.

In addition, in the beam reinforcing structure of the first invention, the part that is not reinforced by the beam reinforcing metal fitting around or at the edge of the through hole (corresponding to the missing part obtained by cutting out the second beam reinforcing metal fitting from the tubular beam reinforcing metal fitting material) However, by appropriately setting the length of the second beam reinforcing bracket and the length of the first beam reinforcing bracket, the bending stress applied to the beam can be distributed to these weak parts in a well-balanced manner. be able to. For example, by making the length of the second beam reinforcing metal fitting equal to or less than the length of the first beam reinforcing metal fitting, it is possible to efficiently achieve both the reinforcing effect and the stress dispersing effect.

A second invention is a beam reinforcing method using beam reinforcing metal fittings, in which a tubular beam reinforcing metal fitting material is divided in the circumferential direction to form at least a pair of first beam reinforcing metal fittings and a pair of second beams. Reinforcing metal fittings are formed, and the pair of first beam reinforcing metal fittings are fixed around or at the edges of through holes formed in the web of the beam so as to face each other in the vertical direction perpendicular to the longitudinal direction of the beam. and fixing a pair of said second beam reinforcing metal fittings in the vicinity of flanges of respective beams above and below said first beam reinforcing metal fittings.

According to the second invention, the productivity of the beam reinforcing metal fitting is improved by dividing the tubular beam reinforcing metal fitting material in the circumferential direction to form the first beam reinforcing metal fitting and the second beam reinforcing metal fitting. be able to. In addition, it is possible to efficiently reinforce the portion of the periphery or edge of the through-hole that most needs to be reinforced by using both the first beam reinforcing metal fitting and the second beam reinforcing metal fitting.

According to the present invention, it is possible to provide a beam reinforcing structure, a beam reinforcing method, and a method of manufacturing a beam reinforcing metal fitting that can efficiently reinforce a beam.

The perspective view which shows the beam reinforcement metal fitting 1. FIG. FIG. 2 is a plan view of a beam reinforcing metal fitting material 7; It is a perspective view which shows the beam reinforcement structure 10, (a) is a figure which shows a back side, (b) is a figure which shows a front side. (a) is a front view showing the beam reinforcing structure 10, and (b) is a sectional view taken along line AA of (a). The figure which shows the other fixing structure of the beam reinforcement metal fittings 1. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a beam reinforcing metal fitting 1 according to this embodiment. The beam reinforcing metal fittings 1 are members made of metal such as steel or stainless steel. Become. A beam reinforcing metal fitting 1 is a member for reinforcing a beam having through holes formed in a web.

The beam reinforcing metal fitting 1a is composed of an arc-shaped body portion 3a and a flange portion 5a. The beam reinforcing metal fitting 1b is composed of an arc-shaped body portion 3b and a flange portion 5b. The flange portions 5a and 5b are arranged on one side in the axial direction of the body portions 3a and 3b. The inner diameters of the main body portions 3a, 3b and the flange portions 5a, 5b are substantially the same, and no irregularities are formed on the inner peripheral surfaces. The flange portions 5a and 5b have a larger outer diameter than the body portions 3a and 3b.

Next, a method for manufacturing the beam reinforcing metal fitting 1 will be described. FIG. 2 is a plan view of the beam reinforcing metal fitting material 7. FIG. The beam reinforcing metal fitting material 7 is a cylindrical member, and the body portions 3a, 3b and the flange portions 5a, 5b shown in FIG. 1 are integrally manufactured. The inner diameter of the beam reinforcing metal fitting material 7 is substantially the same as the outer diameter of the pipe hole through which the pipe or the like passes.

The beam reinforcing metal fitting 1 is manufactured by dividing the beam reinforcing metal fitting material 7 in the circumferential direction. The beam reinforcing metal fitting material 7 is divided into four pieces in the circumferential direction, two of which become the beam reinforcing metal fittings 1a and the remaining two become the beam reinforcing metal fittings 1b. That is, the beam reinforcing metal fitting material 7 is divided in the circumferential direction to form a pair of beam reinforcing metal fittings 1a and a pair of beam reinforcing metal fittings 1b.

At this time, it is desirable that the length of the arc portion of the beam reinforcing metal fitting 1b is equal to or less than the length of the arc portion of the beam reinforcing metal fitting 1a. In particular, it is desirable that the sum of the lengths X of the arc portions of the pair of beam reinforcing metal fittings 1b is 1/10 to 1/2 of the length of the entire circumference of the beam reinforcing metal fitting material 7.

Next, the beam reinforcing structure 10 using the beam reinforcing metal fittings 1 will be described. 3(a) is a perspective view of the beam reinforcing structure 10 viewed from the rear surface 15b side of the web 15, and FIG. 3(b) is a perspective view of the beam reinforcing structure 10 viewed from the front surface 15a side of the web 15. be. 4(a) is a front view of the beam reinforcing structure 10, and FIG. 4(b) is a sectional view taken along the line AA of FIG. 4(a).

The beam 11 is H steel with flanges 13 above and below the web 15 . The web 15 is formed with a through hole 17 for passing a pipe or the like. When the through-hole 17 is formed, the bending strength of the portion in the vertical direction perpendicular to the longitudinal direction of the beam 11, which is around or at the edge of the through-hole 17, is the lowest. The beam reinforcing structure 10 reinforces this portion using the beam reinforcing metal fittings 1 .

A pair of beam reinforcing metal fittings 1 a of the beam reinforcing metal fittings 1 are fixed around or at the edge of the through hole 17 so as to face each other in the vertical direction perpendicular to the longitudinal direction of the beam 11 . The main body portion 3a of the beam reinforcing metal fitting 1a is inserted into the through hole 17, and the flange portion 5a contacts the front surface 15a side of the web 15 near the edge portion of the through hole 17. As shown in FIG. As a result, even if there is a burr on the edge of the through hole 17, it can be hidden by the beam reinforcing metal fitting 1a.

The beam reinforcing metal fitting 1a is joined to the web 15 by welding. In this embodiment, the arc portion on the outer peripheral side of the flange portion 5a is welded to the web 15 over the entire length. That is, the welded portion 19a is formed between the arc portion on the outer peripheral side of the flange portion 5a and the front surface 15a of the web 15. As shown in FIG.

A pair of beam reinforcing metal fittings 1b of the beam reinforcing metal fittings 1 are fixed near the upper flange 13 of the upper beam reinforcing metal fitting 1a and near the lower flange 13 of the lower beam reinforcing metal fitting 1a. The beam reinforcing metal fitting 1b is arranged so that the through hole 17 side becomes the concave side of the arc. The beam reinforcing metal fitting 1 b has a flange portion 5 b that contacts the front surface 15 a of the web 15 and a body portion 3 b that protrudes in the direction opposite to the through hole 17 . That is, the main body portion 3a of the beam reinforcing metal fitting 1a and the main body portion 3b of the beam reinforcing metal fitting 1b are arranged in opposite directions.

The beam reinforcing metal fitting 1b is joined to the web 15 by welding. In this embodiment, the arc portion on the inner peripheral side of the flange portion 5b and both side portions are welded to the web 15 over the entire length. That is, the welded portions 19b are formed between the inner arc portion and both side portions of the flange portion 5b and the front surface 15a of the web 15 . Note that the flange portion 5b and the flange 13 may also be welded.

Next, a beam reinforcement method using the beam reinforcement fitting 1 (construction method of the beam reinforcement structure 10) will be described. First, the cylindrical beam reinforcing metal fitting material 7 shown in FIG. 2 is divided in the circumferential direction to form a pair of beam reinforcing metal fittings 1a and a pair of beam reinforcing metal fittings 1b.

Next, the beam 11 is temporarily placed on the ground so that the front surface 15a side of the web 15 faces upward, and the main body portion 3a of the beam reinforcing metal fitting 1a is inserted into the through hole 17 from the front surface 15a side of the web 15 of the beam 11. At this time, the flange portion 5 a of the beam reinforcing metal fitting 1 a has an outer diameter larger than that of the through hole 17 provided in the beam 11 . Further, the body portion 3 a has an outer diameter smaller than the diameter of the through hole 17 provided in the beam 11 . Therefore, by inserting the outer periphery of the body portion 3 a along the through hole 17 , the flange portion 5 a can be brought into contact with the web 15 . That is, when inserting the beam reinforcing metal fitting 1a into the through hole 17, the flange portion 5a is used for positioning in the axial direction.

After the position of the beam reinforcing metal fitting 1a is determined, the beam reinforcing metal fitting 1a is temporarily fixed to the web 15 by a clamp (not shown). A welded portion 19a is formed between the front surface 15a side of the web 15 and the outer peripheral side arc portion of the flange portion 5a and the front surface 15a of the web 15 to fix the beam reinforcing metal fitting 1a to the web 15. Welding is performed, for example, by shielded arc welding.

Next, the flange portion 5b of the beam reinforcing metal fitting 1b is brought into contact with the front face 15a side of the web 15 in the vicinity of the upper and lower flanges 13 of the beam reinforcing metal fitting 1a for positioning. A welded portion 19b is formed between the inner circular arc portion and both side portions and the front surface 15a of the web 15 to fix the beam reinforcing metal fitting 1b to the web 15 .

The beam reinforcing metal fitting 1a may be welded from the rear surface 15b side of the web 15 instead of from the front surface 15a side. 5A and 5B are diagrams showing another fixing structure of the beam reinforcing metal fitting 1. FIG. In this case, first, the beam 11 is temporarily placed on the ground so that the back surface 15b of the web 15 faces upward, and the beam reinforcing metal fitting 1a is inserted into the through hole from the back surface 15b side of the web 15 of the beam 11, and the flange portion is 5a is brought into contact with the web 15 and positioned. A welded portion 19a is formed between the web 15 and the arc portion extending from the back surface 15b side of the web 15 to the outer peripheral side of the main body portion 3a, and the beam reinforcing metal fitting 1a is fixed to the web 15. As shown in FIG.

Further, the flange portion 5b of the beam reinforcing metal fitting 1b is brought into contact with the rear surface 15b side of the web 15 near the upper and lower flanges 13 of the beam reinforcing metal fitting 1a for positioning. Then, welded portions 19b are formed between the back surface 15b side of the web 15 and the inner peripheral side arc portion and both side portions of the flange portion 5b and the back surface 15b of the web 15 to fix the beam reinforcing metal fitting 1b to the web 15. .

The beam reinforcing metal fitting 1a may have a tapered outer peripheral surface of the body portion 3a as shown in FIG. For example, by forming a tapered shape on the outer peripheral portion of the body portion 3a so that the outer diameter gradually decreases from the flange portion 5a side toward the tip side, it can be used as a groove for welding. In this case, the welded portion 19 a is formed between the main body portion 3 a and the inner surface of the through hole 17 .

In the examples shown in FIGS. 4 and 5, the beam reinforcing metal fittings 1a and 1b are welded from the same side of the web 15, but one can be welded from the front 15a side of the web 15 and the other can be welded from the back 15b side. good. However, by welding from the same side, the beam reinforcing metal fitting 1 can be welded without reversing the beam 11, which facilitates the work. In the example shown in FIGS. 4 and 5, the flange portion 5b of the beam reinforcing metal fitting 1b is brought into contact with the web 15, but the body portion 3b may be brought into contact with the web 15. FIG.

As described above, the beam reinforcing structure 10 can be obtained. The beam reinforcing metal fitting 1 can improve the bending strength of the beam 11 in the vicinity of the through hole 17 .

As described above, according to the present embodiment, the beam reinforcing metal fittings 1a and the beam reinforcing metal fittings 1b are formed by dividing the tubular beam reinforcing metal fitting material 7 in the circumferential direction, so the productivity is excellent. In addition, since the through-hole 17 is provided, the portion that requires the most reinforcement is reinforced by using both the beam reinforcing metal fitting 1a and the beam reinforcing metal fitting 1b. , the beam can be reinforced efficiently, and the total weight of the beam reinforcing metal fitting 1 can be reduced.

According to the present embodiment, the portion corresponding to the missing portion obtained by cutting out the beam reinforcing metal fitting 1b from the beam reinforcing metal fitting material 7 in the perimeter or edge of the through hole 17 can be the weak portion. By appropriately setting the length of the beam reinforcing metal fitting 1a, the bending stress applied to the beam can be distributed to these weak portions in a well-balanced manner.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not influenced by the above-described embodiments. It is obvious that a person skilled in the art can conceive various modifications or modifications within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. be understood to belong to

For example, in the present embodiment, the first and second beam reinforcing metal fittings are composed of the body portion and the flange portion, but the flange portion may not be provided. That is, the first and second beam reinforcing metal fittings may be composed only of the main body portion. In this case, by dividing the cylindrical beam reinforcing metal fitting material in the circumferential direction and also in the axial direction, one beam reinforcing metal fitting material is divided into at least one pair of first beam reinforcing metal fittings and at least one pair of second beams. You can manufacture reinforcing metal fittings.

Moreover, the beam reinforcing metal fitting material is not limited to a cylindrical shape. When the through-hole is rectangular, a square tubular beam reinforcing metal fitting material may be divided to form a pair of first beam reinforcing metal fittings and a pair of second beam reinforcing metal fittings.

1, 1a, 1b... Beam reinforcing metal fittings 3a, 3b... Body parts 5a, 5b... Flange parts 7... Beam reinforcing metal fitting materials 9... Cutting parts 10... Beam reinforcing structure 11... .

Claims (3)

A beam reinforcing structure using a beam reinforcing metal fitting,
a beam having through holes formed in the web;
a pair of first beam reinforcing metal fittings fixed facing each other in the vertical direction perpendicular to the longitudinal direction of the beam around or at the edge of the through hole;
a pair of second beam reinforcing brackets fixed near the flanges of the upper and lower beams of the first beam reinforcing bracket;
and
A beam reinforcing structure, wherein the first beam reinforcing metal fitting and the second beam reinforcing metal fitting are formed by dividing a tubular beam reinforcing metal fitting material in a circumferential direction. 2. The beam reinforcing structure according to claim 1, wherein the length of said second beam reinforcing metal fitting is equal to or less than the length of said first beam reinforcing metal fitting. A beam reinforcing method using a beam reinforcing metal fitting,
dividing a tubular beam reinforcing metal fitting material in the circumferential direction to form at least a pair of first beam reinforcing metal fittings and a pair of second beam reinforcing metal fittings;
A pair of the first beam reinforcing metal fittings are fixed around or at the edge of a through hole formed in the web of the beam so as to face each other in the vertical direction perpendicular to the longitudinal direction of the beam, and the first beam A beam reinforcing method comprising fixing a pair of said second beam reinforcing metal fittings near flanges of respective beams above and below said reinforcing metal fittings.

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