JP3909365B2 - Beam reinforcing bracket and beam through-hole reinforcement structure using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a beam reinforcing metal fitting that is fixed to a through hole formed in a beam constituting various building structures and reinforces the beam, and a beam through hole reinforcing structure using the same.
[0002]
[Prior art]
Many H-shaped steels and I-shaped steels are used as beams in building structures. In such a building structure, one or two or more through holes may be formed in the web portion of the beam in order to pass piping and wiring provided therein. In this case, as means for preventing the strength of the beam from being lowered, there are a reinforcing sleeve member (for example, see Patent Document 1) attached to the through hole, a reinforcing plate (for example, see Patent Document 2), and the like.
[0003]
Patent Document 1 describes a beam penetration sleeve 83 as shown in FIG. The beam penetration sleeve 83 is formed by integrally molding a sleeve main body 80 and a flange 81 positioned on the outer periphery of the sleeve main body 80 with a material that can be welded to the beam 82. The thickness of the sleeve main body 80 is as follows. At least the inner peripheral surface side is formed so as to gradually become thicker from both ends of the sleeve body 80 toward the intersection of the sleeve body 80 and the flange 81. With such a configuration, there is an effect that even if the pipe 84 is inserted from an oblique direction, the pipe 84 is not damaged by coming into contact with the end portion of the beam penetration sleeve 83.
[0004]
Patent Document 2 describes a through-hole reinforcing structure characterized in that a flat opening plate is joined to both surfaces of a beam web portion in which a through-hole is formed by high-strength bolting. As a result, it is possible to reinforce the beam through-hole with a reasonable cost and a small number of steel frame processing steps.
[0005]
[Patent Document 1]
Japanese Examined Patent Publication No. 4-63942 (page 1-2, Fig. 1)
[Patent Document 2]
Japanese Utility Model Publication No. 5-57149 (page 3-4, Fig. 1)
[0006]
[Problems to be solved by the invention]
However, since the beam penetration sleeve 83 described in Patent Document 1 is a cylindrical member slightly shorter than the width of the flange portion 85 of the beam 82, there is a limit to the amount of change in the inner diameter that can be formed by adjusting the wall thickness. There is also a limit to the insertion angle of the beam penetration sleeve 83. For this reason, the reinforcement member with a high freedom degree of attachment of the piping 84 is calculated | required.
[0007]
In addition, the through-hole reinforcing structure described in Patent Document 2 requires two opening plates, so the number of parts increases, and the two opening plates arranged on both sides of the web portion of the beam are bolted. There is a problem that positioning at the time of fastening is difficult.
[0008]
On the other hand, as represented by intelligent buildings in recent years, the facility functions of building structures have become more complex, and the building to be designed will function sufficiently in the future in terms of building plans and facilities. It is necessary to consider. For this reason, it is desirable that various pipes and wirings inside the building structure be aggregated in a column in the column-beam joint structure, in other words, in a region close to the joint end of the beam. There is a demand to form in a position close to the pillar.
[0009]
However, the end of the beam that is close to the column is called a plasticized region, and is a part that absorbs seismic energy and deforms greatly during a large earthquake. Since there is no reinforcing means that causes a significant decrease in strength and can compensate for this, installation of through holes in the plasticized region is generally avoided. Therefore, the actual situation is that a through hole must be formed in a part that is inconvenient from the surface of the piping and wiring, that is, a part away from the column, that is, a part away from the plasticizing region of the beam.
[0010]
Therefore, the problem to be solved by the present invention is to increase the degree of freedom of mounting the pipes to the through holes established in the beam and to reinforce the through holes of different sizes to the required strength while eliminating waste of materials. Another object of the present invention is to provide a beam reinforcing bracket capable of installing a through hole in a plasticized region close to a column beam joint and a beam through hole reinforcing structure using the beam reinforcing bracket.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the beam reinforcing bracket of the present invention is a ring-shaped beam reinforcing bracket whose outer peripheral portion is welded and fixed to the peripheral portion of a through-hole formed in the beam, and has an axial length thereof. A flange portion whose outer diameter is 0.5 times to 10.0 times the radial thickness and larger than the through hole is formed on one side of the outer peripheral portion in the axial direction .
[0012]
When an external force is applied to the beam, the stress generated in the peripheral portion of the through hole gradually decreases as it moves away from the web portion along the central axis of the through hole. Therefore, the shape of the beam reinforcing bracket is a ring shape, and its axial length is restricted to 0.5 to 10.0 times (more preferably 0.5 to 5.0 times) the radial thickness. By doing so, it is possible to reinforce to the required strength while eliminating waste of material even for through-holes of different sizes, and beam reinforcement brackets even if the pipe is inserted diagonally into the through-hole of the beam The degree of freedom of pipe installation is increased.
[0013]
In this case, the axial length is set to 0.5 times to 10.0 times the radial thickness. If the axial length is less than 0.5 times, the strength becomes insufficient. This is because if it is larger, the strength of the beam reinforcing bracket does not increase for the increase of the axial length, and the waste of material increases.
[0014]
Moreover, it is also possible to make the volume of the beam reinforcing metal fitting 1.0 to 3.0 times the volume of the space portion formed inside the through hole formed in the beam. Here, the volume of the space portion can be obtained by multiplying the opening area of the through hole by the thickness of the web portion.
[0015]
When the volume of the beam reinforcing metal fitting is 1.0 to 3.0 times the volume of the space portion is less than 1.0 times, a beam in which a through hole is not formed (hereinafter referred to as “non-hole beam”). This is because the strength becomes smaller than that of the non-hole portion of the beam and the quality becomes excessive, and the weight becomes too large. By setting it as such a structure, reinforcement with a predetermined intensity | strength is performed with respect to the through-hole from which a magnitude | size differs.
[0016]
Moreover, in the beam reinforcement metal fitting of this invention, the flange part whose outer diameter is larger than the said through-hole is formed in the single side | surface side of the axial direction of an outer peripheral part. The beam reinforcing bracket is fitted and attached from one side in the axial direction of the through hole. At this time, the beam reinforcing bracket is fitted until the flange portion of the beam reinforcing bracket contacts the beam web portion around the through hole. Directional positioning can be performed accurately.
[0017]
Further, it is possible to gradually reduce the diameter of the outer peripheral portion toward the other surface side in the axial direction. With this configuration, the work of fitting the beam reinforcing metal fitting into the through hole is facilitated, and the work time is shortened.
[0018]
On the other hand, the length from the minimum outer diameter portion of the outer peripheral portion to the outer periphery of the flange portion is less than or equal to half of the minimum outer diameter of the outer peripheral portion, and the axial length of the flange portion is set in the axial direction of the beam reinforcing bracket. It is desirable to make it half or less of the length. When the beam reinforcing bracket having such a structure is welded and joined to the through hole of the beam, the excellent reinforcing action can provide the same strength as a beam without a through hole, that is, a so-called non-hole beam. Through holes can be installed in the plasticized region close to the beam joint.
[0019]
Moreover, it is desirable that the inner diameter of the beam reinforcing bracket is 0.8 times or less of the beam formation. Here, the beam forming means the dimension in the gravity direction of the beam, for example, the dimension from one flange part surface to the other flange part surface in the case of a beam using H-shaped steel.
[0020]
In the case of the conventional beam through-hole sleeve, the maximum inner diameter of the through-hole that can be formed in the beam is about 0.5 times that of the beam, so it is necessary to provide a plurality of through-holes when there are many pipes and wires. However, by reducing the inner diameter of the beam reinforcement bracket to 0.8 times or less than that of the beam, the size of the holes for piping and wiring can be increased to 0.8 times that of the beam without reducing the strength of the beam. Therefore, it is not necessary to provide a plurality of through holes, and man-hours can be reduced. In addition, when the inner diameter of the beam reinforcing bracket exceeds 0.8 times that of the beam, the beam reinforcing function is deteriorated, so 0.8 times or less is preferable.
[0021]
It is also possible to form three or more positioning projections that directly contact the through hole on the outer peripheral portion. By setting it as such a structure, the center position can be match | combined by absorbing the difference | error of the shape of a through-hole and a beam reinforcement metal fitting.
[0022]
Next, the beam through-hole reinforcing structure of the present invention is formed by welding and fixing the outer peripheral portion of any of the above-mentioned beam reinforcing brackets to the peripheral portion of the through-hole formed in the beam constituting the column-beam joint structure. The distance from the joint between the column and the beam to the axis of the beam reinforcing bracket is set to be twice or less the beam formation.
[0023]
By adopting such a configuration, the through-hole formed in the beam for passing various piping and wiring inside the building structure can be arranged at a position close to the column of the column-beam joint structure. Therefore, it is possible to consolidate piping and wiring, which is convenient for building design, and the workability of piping and wiring is greatly improved.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
(First embodiment)
FIG. 1A is a side sectional view showing a use state of a beam reinforcing bracket according to the first embodiment of the present invention, and FIG. 1B is a side sectional view showing a through hole of a beam to which the beam reinforcing bracket is attached. FIG. 2 is a perspective view showing a usage state of the beam reinforcing bracket.
[0025]
As shown in FIG. 1, the beam reinforcing metal fitting 1 is fitted into a circular through hole 3 having a size of an inner diameter R formed on a beam 2 made of, for example, H-shaped steel, and an outer peripheral portion 4 is formed on the peripheral portion of the through hole 3. Is a ring-shaped reinforcing member fixed by welding. The outer diameter d1 of the beam reinforcing bracket 1 is a size that can be fitted into a circular space 6 having an inner diameter R formed inside the through-hole 3, and its axial length A is the web portion 2w of the beam 2. It is formed thicker than the thickness t1. Further, the inner diameter d2 of the beam reinforcing metal fitting 1 is large enough to allow the pipe 5 to be inserted therein, and is formed to be 0.8 times or less the beam height H which is the height of the beam 2 in the gravity direction. .
[0026]
The volume V1 of the space 6 that is the missing portion of the web 2w of the beam 2 is
V1 = R ² × π × t1 × 1/4
The volume V2 of the beam reinforcing bracket 1 is
V2 = (d1 ² −d2 ² ) × π × A × 1/4
Can be obtained. In the present embodiment, the volume V2 of the beam reinforcing bracket 1 is set to 1.0 to 3.0 times the volume V1 of the space 6. With this configuration, the strength of the beam 2 in which the through hole 3 is formed can be made equal to that of the non-hole beam.
[0027]
In addition, considering the fact that the length in the axial direction is increased as in the conventional beam penetration sleeve, there is little influence on the strength, so that the axial length A is set to the radial thickness B (where B = It is set to 0.5 times to 10.0 times (more preferably 0.5 times to 5.0 times) of (d1-d2) / 2). With this configuration, the required strength can be secured without changing the setting of the volume ratio between the volume V1 of the space 6 and the volume V2 of the beam reinforcing bracket 1, and the axial length of the beam reinforcing bracket 1 can be shortened. In addition, since the insertion angle of the pipe 5 passing through the inside of the beam reinforcing metal fitting 1 with respect to the beam 2 can be increased, the degree of freedom of attachment can be increased.
[0028]
As shown in FIG. 1 (a), the beam reinforcing bracket 1 is fixed by welding both end portions of the outer peripheral portion 4 in the axial direction to the peripheral portion of the through-hole 3 from the front side and the back side, respectively. . After the beam reinforcing metal fitting 1 is fixed by welding, as shown in FIG. 2, a pipe 5 or the like can be inserted into the inside thereof.
[0029]
(Second Embodiment)
FIG. 3 is a side sectional view showing a usage state of the beam reinforcing metal fitting according to the second embodiment of the present invention. The beam reinforcing bracket 7 is formed by forming a flange portion 8 having an outer diameter larger than that of the through hole 3 formed in the beam 2 on one axial side of the outer peripheral portion 4 of the beam reinforcing bracket 1 described above. After the outer peripheral portion 9 of the beam reinforcing bracket 7 is fitted into the through-hole 3 from one side of the web portion 2w of the beam 2 (left side in FIG. 3), the flange portion 8 is brought into contact with the web portion 2w of the beam 2. The outer peripheral portion 9 and the outer peripheral portion of the flange portion 8 are fixed by welding to the front surface side and the back surface side of the web portion 2w of the beam 2, respectively. By providing such a flange portion 8, the axial positioning can be reliably performed without an installation tool.
[0030]
(Third embodiment)
4 is a front view showing a beam reinforcing bracket according to a third embodiment of the present invention, FIG. 5 is a sectional view taken along line XX in FIG. 4, and FIG. 6 is a use state of the beam reinforcing bracket shown in FIG. FIG.
[0031]
As shown in FIGS. 4 and 5, in the beam reinforcing bracket 10, a flange portion 13 is provided on one axial side of the outer peripheral portion 12, and the outer peripheral portion 12 is connected to the other surface side in the axial direction (flange portion 13. The taper shape is gradually reduced in diameter toward the surface side having no surface. Here, when the dimensions of each part of the beam reinforcing bracket 10 are represented by reference numerals as shown in FIG. 5, the volume V2 of the beam reinforcing bracket 10 is:
V2 = (πT / 3) × [(Q / 2) ² + {(Q / 2) × (d3 / 2)} + (d3 / 2) ² ] + (S / 2) ² πF− (d2 / 2 ) ² πA. Further, as shown in FIG. 6, the volume V1 of the space 6 (not shown) of the through hole 3 formed in the web portion 2w of the beam 2 is the same as that calculated based on FIG.
V1 = R ² × π × t1 × 1/4
Can be obtained.
[0032]
In the present embodiment, the volume V2 of the beam reinforcing bracket 10 welded to the through hole 3 of the beam 2 is set to 1.0 to 3.0 times the volume V1 of the space portion 6, and the inner diameter d2 of the beam reinforcing bracket 10 is set. Is set to 0.8 times or less of the beam formation H of the beam 2. Furthermore, in the beam reinforcing bracket 10, the length C from the minimum outer diameter portion 12a of the outer peripheral portion 12 to the outer periphery of the flange portion 13 is less than or equal to half the minimum outer diameter d3 of the outer peripheral portion 12 (more preferably 1/4 or less). In addition, the axial length F of the flange portion 13 is set to be equal to or less than half of the axial length A of the beam reinforcing bracket 10. With such a configuration, the strength of the beam 2 in which the through hole 3 is formed can be made equal to that of the non-hole beam.
[0033]
As shown in FIG. 6, in the welded portion W between the through hole 3 formed in the web portion 2 w of the beam 2 and the beam reinforcing bracket 10, the outer peripheral portion 12 of the beam reinforcing bracket 10 extends to the inner edge portion 3 a of the through hole 3. It is firmly fixed by penetration welding. In addition, since the outer peripheral portion 12 of the beam reinforcing bracket 10 is gradually reduced in diameter toward the surface without the flange portion 13, the outer peripheral portion 12 of the beam reinforcing bracket 10 is inserted into the through hole 3. As a result of the outer peripheral portion 12 being inclined with respect to the inner edge portion 3a of the through hole 3, the outer peripheral portion 12 functions as a welding groove, so that the weldability is improved and the occurrence of poor welding can be avoided. .
[0034]
(Fourth embodiment)
7 is a front view showing a beam reinforcing bracket according to a fourth embodiment of the present invention, FIG. 8 is a cross-sectional view taken along line YY in FIG. 7, and FIG. 9 is a use state of the beam reinforcing bracket shown in FIG. FIG.
[0035]
As shown in FIGS. 7 and 8, in the beam reinforcing bracket 20, the flange portion 13 is provided on one axial side of the outer peripheral portion 12, and the outer peripheral portion 12 is gradually moved toward the other axial side. The taper shape is reduced in diameter. In addition, the positioning protrusions 11 that are in direct contact with the inner edge portion 3a of the through hole 3 of the beam 2 are equally arranged at three positions on the outer peripheral portion 12 every 120 degrees.
[0036]
By providing such a positioning protrusion 11, even if there is a geometric error between the inner edge 3a of the through-hole 3 of the beam 2 and the outer periphery 12 of the beam reinforcing bracket 20, the center position can be easily and accurately. As a result, the mounting accuracy can be improved to improve the quality, and the working time can be shortened.
[0037]
Further, since the outer peripheral portion 12 has a shape that gradually decreases in diameter toward the surface without the flange portion 13, the outer peripheral portion 12 of the beam reinforcing metal fitting 20 is fitted into the through hole 3 as shown in FIG. 9. As a result, the outer peripheral portion 12 is inclined with respect to the inner edge portion 3a of the through hole 3. As a result, the outer peripheral portion 12 functions as a welding groove, so that weldability is improved and occurrence of poor welding is avoided. be able to.
[0038]
Furthermore, in the beam reinforcing bracket 20, the length C from the minimum outer diameter portion 12a of the outer peripheral portion 12 to the outer periphery of the flange portion 13 is less than or equal to half the minimum outer diameter d3 of the outer peripheral portion 12 (more preferably 1/4 or less). In addition, the axial length F of the flange portion 13 is set to be less than or equal to half the axial length A of the beam reinforcing bracket 20. Further, the inner diameter d2 of the beam reinforcing bracket 20 is set to be 0.8 times or less the beam formation H of the beam 2. As shown in FIG. 9, when the beam reinforcing metal fitting 20 having such a configuration is fitted into the through hole 3 of the beam 2 and the outer peripheral portion 12 and the inner edge portion 3a of the through hole 3 are welded to each other, excellent reinforcing action is obtained. The same strength as a non-hole beam in which the through hole 3 is not formed is obtained.
[0039]
Here, with reference to FIG. 10, the beam through-hole reinforcement structure constructed | assembled using the beam reinforcement metal fitting 10 shown in FIG. 4 etc. which were mentioned above is demonstrated. As shown in FIG. 10, a column beam connection structure is formed in which four horizontal beams 2 are bonded to one vertical column 14 at intervals of 90 degrees from four directions. A beam reinforcing metal fitting 10 is welded and joined in a state shown in FIG. 6 to a through hole 3 formed in two beams 2 arranged so as to form a straight line.
[0040]
In the beam through-hole reinforcing structure shown in FIG. 10, the distance 17 from the joint 16 between the column 14 and each beam 2 to the axis 10 c of the beam reinforcing bracket 10 is set to be not more than twice the beam formation H of the beam 2. . In this way, by reinforcing with the beam reinforcing metal fitting 10, the through hole 3 can be arranged at a position close to the column 14, so that the piping and wiring can be consolidated. This is convenient for building design and greatly improves the workability of various pipes and wiring when building a building structure.
[0041]
In general, a region from the joint 16 between the beam 3 and the column 14 to a position separated by a distance twice as long as the beam formation H is referred to as a plasticized region 15 and is usually a region where the formation of the through hole 3 is avoided. However, since the strength reduction of the beam 2 is suppressed by welding the beam reinforcing metal fitting 10 to the peripheral portion of the through hole 3, and the strength equivalent to that of the non-hole beam is obtained, the plasticized region 15 is also penetrated. The hole 3 can be formed.
[0042]
The reason why the beam reinforcing bracket 10 having the above-described configuration exhibits an excellent beam reinforcing action is partially unknown, but the shape of the beam reinforcing bracket 10, the dimensional ratio of each part, the volume ratio, etc. are described above. By setting the beam reinforcing bracket 10 to the through-hole 3 of the beam 2, the out-of-plane rigidity of the web portion 2w of the beam 2 is increased and the web portion 2w when an external force is applied to the beam 2 is set. It is presumed that the out-of-plane deformation is prevented.
[0043]
Further, by making the axial length A of the beam reinforcing bracket 10 equal to or less than 10.0 times the radial thickness B, the material of the beam 2 can be reduced and the weight of the beam 2 can be reduced. It is also possible to increase the degree of freedom of installation.
[0044]
10 shows the beam through-hole reinforcing structure formed by using the beam reinforcing bracket 10, but the same beam through-hole reinforcing structure can be obtained by using the other beam reinforcing brackets 1, 7, and 20 described above. In any case, the same effects as those obtained when the beam reinforcing metal fitting 10 is used can be obtained.
[0045]
【The invention's effect】
The following effects can be achieved by the present invention.
[0046]
(1) The shape of the beam reinforcing bracket is a ring shape, and the axial length thereof is 0.5 to 10.0 times (more preferably 0.5 to 5.0 times) the radial thickness. By doing this, it is possible to reinforce to the required strength while eliminating material waste even for through holes of different sizes, and even if the pipe is inserted diagonally into the through hole, it will contact the beam reinforcing bracket It is possible to increase the degree of freedom of installation of piping and the like.
[0047]
(2) By setting the volume of the beam reinforcing bracket to 1.0 to 3.0 times the volume of the space formed inside the through hole formed in the beam, However, the reinforcement is performed with the necessary strength, and the weight can be prevented from becoming too large.
[0048]
(3) By forming a flange portion having an outer diameter larger than that of the through hole on one side of the outer peripheral portion in the axial direction, the axial positioning can be performed accurately and quickly.
[0049]
(4) By gradually reducing the diameter of the outer peripheral portion toward the other surface side in the axial direction, the work of fitting the beam reinforcing bracket into the through hole can be facilitated and the work time can be shortened.
[0050]
(5) The length from the minimum outer diameter portion of the outer peripheral portion to the outer periphery of the flange portion is less than half of the minimum outer diameter of the outer peripheral portion, and the axial length of the flange portion is the axial length of the beam reinforcing bracket. By making it less than half the length, it exerts excellent reinforcing action when welded to the through hole of the beam, and the same strength as a non-hole beam can be obtained, so the through hole in the plasticized region close to the column beam joint Can be installed.
[0051]
(6) By increasing the inner diameter of the beam reinforcement bracket to 0.8 times or less of the beam formation, the size of the beam through-hole is increased to 0.8 times that of the beam formation without causing a reduction in the strength of the beam. Therefore, it is not necessary to provide a plurality of through holes, and man-hours can be reduced.
[0052]
(7) By forming three or more positioning protrusions that directly contact the inner edge of the through hole of the beam on the outer periphery, the center position can be adjusted by absorbing errors in the shape of the through hole and the beam reinforcing bracket. For this reason, profitability is increased, quality is improved, and work time can be shortened.
[0053]
(8) In a beam through-hole reinforcing structure formed by welding the beam reinforcing metal fitting of any one of (1) to (7) above to a through-hole of a beam constituting the column-beam connecting structure, the column and the beam are joined By setting the distance from the center of the beam reinforcement bracket to less than twice that of the beam, it is possible to place through-holes at positions close to the pillars, so that piping and wiring can be consolidated. It is convenient in the design of objects, and the workability of wiring and piping is greatly improved.
[Brief description of the drawings]
FIG. 1 (a) is a side sectional view showing a use state of a beam reinforcing bracket according to a first embodiment of the present invention, and FIG. 1 (b) is a side showing a vicinity of a through hole of a beam to which the beam reinforcing bracket is attached. It is sectional drawing.
FIG. 2 is a perspective view showing a usage state of the beam reinforcing metal fitting shown in FIG.
FIG. 3 is a side sectional view showing a usage state of a beam reinforcing metal fitting according to a second embodiment of the present invention.
FIG. 4 is a front view showing a beam reinforcing bracket according to a third embodiment of the present invention.
5 is a cross-sectional view taken along line XX in FIG.
6 is a side sectional view showing a usage state of the beam reinforcing bracket shown in FIG. 4;
FIG. 7 is a front view showing a beam reinforcing bracket according to a fourth embodiment of the present invention.
FIG. 8 is a cross-sectional view taken along line YY in FIG.
FIG. 9 is a side sectional view showing a usage state of the beam reinforcing bracket shown in FIG. 7;
10 is a perspective view showing a beam through-hole reinforcing structure constructed using the beam reinforcing metal fitting shown in FIG. 4. FIG.
FIG. 11 is a side sectional view showing a beam penetration sleeve according to the prior art.
[Explanation of symbols]
1, 7, 10, 20 Beam reinforcing bracket 2 Beam 2w Web portion 3 Through hole 3a Inner edge portion 4 Outer peripheral portion 5 Pipe 6 Space portion 8, 13 Flange portion 9 Outer peripheral portion 10c Axis 11 Positioning projection portion 12 Outer peripheral portion 12a Minimum outside Diameter 14 Column 15 Plasticized region 16 Joint 17 Distance d2 Inner diameter H of beam reinforcing bracket Beam forming W Welded portion

Claims (7)

A ring-shaped beam reinforcing bracket whose outer peripheral portion is welded and fixed to the peripheral portion of a through-hole formed in the beam, the axial length of which is 0.5 times to 10.0 times the radial thickness The beam reinforcing bracket is characterized in that a flange portion having an outer diameter larger than that of the through hole is formed on one side of the outer peripheral portion in the axial direction .   2. The beam reinforcing bracket according to claim 1, wherein a volume of the beam reinforcing bracket is 1.0 to 3.0 times a volume of a space portion formed inside the through hole formed with the beam. . The beam reinforcing bracket according to claim 1 or 2 , wherein the diameter of the outer peripheral portion is gradually reduced toward the other surface side in the axial direction. The length from the minimum outer diameter portion of the outer peripheral portion to the outer periphery of the flange portion is equal to or less than half of the minimum outer diameter of the outer peripheral portion, and the axial length of the flange portion is the axial length of the beam reinforcing bracket. The beam reinforcing bracket according to any one of claims 1 to 3, wherein the beam reinforcing bracket is set to a half or less. The beam reinforcing bracket according to any one of claims 1 to 4 , wherein an inner diameter of the beam reinforcing bracket is set to be 0.8 times or less of a beam formation of the beam. The beam reinforcing bracket according to any one of claims 1 to 5 , wherein three or more positioning protrusions that directly contact an inner edge of the through hole are formed on the outer peripheral portion. A beam through-hole reinforcing structure formed by welding and fixing the outer peripheral portion of the beam reinforcing metal fitting according to any one of claims 1 to 6 to a peripheral portion of a through-hole formed in a beam constituting a column beam connection structure. A beam through-hole reinforcing structure characterized in that a distance from a joint position between the column and the beam to an axis center of the beam reinforcing bracket is set to be twice or less of a beam formation of the beam.

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