JP2007138449A - Beam through hole reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a beam through hole reinforcing structure which can efficiently transfer the stress of a beam to fittings even if the fittings are bolt-connected to the beam. <P>SOLUTION: According to the beam through hole reinforcing structure 1, the beam through hole reinforcing fittings 2, 31 cooperatively pinch a beam through hole 17, and the beam through hole reinforcing fittings 2, 31 are fastened to each other by a high-strength bolt inserted into a bolt insertion hole. Further a contact portion 39 of the beam through hole reinforcing fitting 31 makes contact with a tapered portion 5 of the beam through hole reinforcing fitting 2, and a tapered portion 35 makes contact with the rim 19 of the beam through hole 17. By bringing the contact portion 39 into contact with the tapered portion 5, a gap formed between the beam through hole reinforcing fitting 2 and the through hole 17 is filled, and by bringing the tapered portion 35 into contact with the contact portion 39, the beam through hole reinforcing structure 1 and the beam 11 are stuck to each other without a gap therebetween. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a beam through-hole reinforcing structure.

H-shaped steel, I-shaped steel, etc. are widely used as beams for building structures. In such beams, beam through-holes for passing piping provided inside the building structure are formed. There is.
At that time, in order to prevent a decrease in strength due to the formation of the beam through hole, a reinforcing metal fitting may be attached to the beam through hole.

  There are two methods for mounting the bracket: a method of integrating the bracket and the beam by welding, and a method of integrating the bracket and the beam by friction bonding using fastening means such as bolts, but the bracket and the beam are integrated. In many cases, welding is used.

On the other hand, since there are defects such as deformation of metal fittings and beams due to heat generated and the need for skill in mounting, bolt joining may be used, and the following are known (Patent Documents) 1).
JP 2003-232077 A

However, in the case of conventional bolted joints, it is difficult to completely integrate the beam and metal fitting by friction welding, and there is a gap between the beam through hole and the metal fitting, or between the bolt shaft and the bolt insertion hole peripheral surface. To do.
Therefore, when stress due to a load such as an earthquake acts on the beam, a slip occurs between the bracket and the beam, and the stress cannot be transmitted to the bracket until it is deformed by the gap, so the reinforcement effect of the bracket cannot be exhibited. There is a problem.
Therefore, the frictional force has to be increased by increasing the number of bolts, which increases costs and deteriorates work efficiency.

  This invention is made | formed in view of such a problem, The objective is to provide the beam through-hole reinforcement structure which can exhibit the reinforcement effect of a metal fitting even in the case of bolt joining.

  In order to achieve the above-mentioned object, a first invention is a reinforcing metal fitting for reinforcing a beam through hole formed in a steel beam web, the first metal fitting provided so as to sandwich the beam, and a first metal fitting. The first metal fitting is in a ring shape having a through hole in the substantially center, and is provided on the outer periphery of the ring main body, the outer periphery of the ring main body, and a flange portion thinner than the ring main body, and the ring main body And a taper portion provided between the flange portion and a fastening means insertion hole provided in the flange portion, through which the fastening means is inserted, wherein the second fitting is in a ring shape, A through hole that is larger than the inner circumference of the taper portion of the first metal fitting and smaller than the outer circumference; a substantially trapezoidal convex portion provided on the inner circumference side that contacts the taper portion of the first metal fitting; A fastening means insertion hole opposite to the fastening means insertion hole of the metal fitting. Beam through hole reinforcing bracket, characterized in Rukoto. It is.

  A second invention is a beam through-hole reinforcing structure that is provided around a beam through-hole formed in a steel beam web and reinforces the beam through-hole, and is provided so as to sandwich the beam. The ring body of the first metal fitting is inserted into the beam through-hole, and the convex portion of the second metal fitting is connected to the edge of the beam through-hole and the first metal fitting. Fastening by fastening means that pass through mutually opposing fastening means insertion holes provided in the first metal fitting, the second metal fitting, and the web of the beam so as to come into contact with the taper portion of the metal fitting. This is a beam through-hole reinforcing structure.

  A third invention is a ring-shaped reinforcing metal fitting provided around a beam through hole formed in a steel beam web and reinforcing the beam through hole, the ring main body, and a substantially center of the main body. A through-hole provided in a portion, a flange portion provided on an outer periphery of the ring body, thinner than the ring body, a tapered portion provided between the ring body and the flange portion, and the flange portion. The fastening means insertion hole through which the provided fastening means is inserted and a protrusion provided in the flange portion, the protrusion is inserted into the web of the beam, and the taper portion contacts the edge of the beam through hole This is a beam through-hole reinforcing metal fitting.

  A fourth invention is a beam through-hole reinforcing structure provided around a beam through-hole drilled in a steel beam web, which reinforces the beam through-hole, and includes a beam through-hole reinforcing bracket and the beam through-hole. A hole reinforcing bracket, and a fastening means provided in the web of the beam and passing through mutually opposing fastening means insertion holes. The beam through-hole reinforcing bracket is formed on a ring body and an outer periphery of the ring body. A flange portion provided; a taper portion provided between the ring body and the flange portion; and a protrusion provided on a surface of the flange portion that faces the web of the beam, the beam penetrating The hole reinforcing metal fitting is fastened by fastening means for inserting the ring main body through the beam through hole, and passing through mutually opposing fastening means insertion holes provided in the flange portion and the web of the beam, and the protrusion is The web of the beam is difficult A beam through hole reinforcing structure, characterized in that the serial tapered portion comes into contact with the edge of the beam through holes.

  According to the present invention, it is possible to provide a beam through-hole reinforcing structure capable of exerting the reinforcement effect of the metal fittings even in the case of bolt joining. Efficiency is improved.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a cross-sectional view showing a beam through-hole reinforcing metal fitting 2 as a first metal fitting constituting the beam through-hole reinforcing structure 1 according to the present embodiment, and FIG. 2 is a view in the direction of arrow A in FIG. FIG. 3 is a view in the direction of arrow B in FIG.

  4 is a cross-sectional view showing a beam through-hole reinforcing metal fitting 31 as a second metal fitting constituting the beam through-hole reinforcing structure 1 according to this embodiment, and FIG. 5 is a view in the direction of the arrow C in FIG. 6 and 6 are views in the direction of arrow D in FIG.

As shown in FIGS. 1 to 3, the beam through-hole reinforcing metal fitting 2 has a ring shape, and the ring body 3 is provided with a tapered portion 5.
Further, a flange portion 6 is provided on the outer periphery of the ring body 3, and bolt insertion holes 9 a, 9 b, 9 c, 9 d are provided on the flange portion 6.

  A through hole 7 is provided in the approximate center of the ring body 3 and the tapered portion 5.

  As shown in FIGS. 4 to 6, the beam through-hole reinforcing metal fitting 31 has a ring shape, and bolt insertion holes 39 a, 39 b, 39 c, 39 d are provided in the vicinity of the outer periphery of the ring main body 33. A through hole 37 is provided in the approximate center of the main body 33.

  In addition, a convex portion is provided on the inner peripheral side of the through hole 37, and the convex portion has a contact portion 39 that contacts the tapered portion 5 of the beam reinforcing bracket 1 and a tapered portion that contacts the edge portion 21 of the beam through hole 17. 35 is provided.

  Next, the structure of the beam through-hole reinforcing structure 1 using the beam through-hole reinforcing bracket 2 and the beam through-hole reinforcing bracket 31 will be described. FIG. 7 is a plan view showing the beam 11 before the beam through-hole reinforcing structure 1 is provided, and FIG. 8 is a cross-sectional view taken along line EE of FIG.

9 is a plan view showing the beam 11 provided with the beam through-hole reinforcing structure 1, and FIG. 10 is a rear view of FIG.
Further, FIG. 11 is a cross-sectional view taken along line FF in FIG. 9, and FIG. 12 is an enlarged cross-sectional view taken along line GG in FIG.
13 to 15 are modifications of the tapered portion 35 and the contact portion 39.

  As shown in FIGS. 7 and 8, the beam 11 is H-shaped steel having flanges 15 a and 15 b at both ends of the web 13, and the web 13 is provided with a beam through hole 17.

  As shown in FIGS. 9 to 11, the beam through-hole reinforcing structure 1 has a structure in which the beam through-hole reinforcing bracket 2 and the beam through-hole reinforcing bracket 31 sandwich the beam through-hole 17. 2 and the beam through-hole reinforcing metal fitting 31 are fastened to each other by high-strength bolts 19a, 19b, 19c, and 19d inserted through the bolt insertion holes.

Here, as shown in FIG. 12, the contact portion 39 of the beam through-hole reinforcing bracket 31 is in contact with the tapered portion 5 of the beam through-hole reinforcing bracket 2.
Further, the taper portion 35 of the beam through-hole reinforcing bracket 31 is in contact with the edge portion 21 of the through-hole 17.

  That is, the contact portion 39 is in contact with the tapered portion 5, thereby filling a gap generated between the beam through-hole reinforcing bracket 2 and the beam through-hole 17, and the tapered portion 35 is connected to the edge portion 21 of the beam through-hole 17. By making contact, the beam through-hole reinforcing structure 1 and the beam 11 are in close contact with each other without a gap.

  Therefore, the beam through-hole reinforcement structure 1 and the beam 11 can be brought into contact with each other without any gap even by bolt connection, and the reinforcing effect of the metal fittings can be exhibited.

  The shape of the taper portion 35 is not limited to the taper shape as long as the shape can contact the edge portion 21. For example, the R portion 35b is formed like a beam through-hole reinforcing metal fitting 31a shown in FIG. It may be provided instead.

  Further, the shape of the contact portion 39 may be anything as long as it is in contact with the taper portion 5, for example, a rectangular shape such as a contact portion 39a shown in FIG. 14, or a contact portion 39b shown in FIG. The shape may have a curved surface.

  Thus, according to the first embodiment, the beam through-hole reinforcing structure 1 has the beam through-hole reinforcing bracket 2 and the beam through-hole reinforcing bracket 31, and the contact portion 39 of the beam through-hole reinforcing bracket 31 has the beam The taper portion 5 of the through-hole reinforcing metal fitting 2 is in contact with the taper portion 35 of the beam through-hole reinforcing metal fitting 31 and the edge 21 of the beam through-hole 17 is in contact.

  Therefore, the beam through-hole reinforcing structure 1 and the beam 11 can be brought into close contact with each other even when bolted, and the stress applied to the beam 11 can be efficiently transmitted to the beam through-hole reinforcing structure 1.

Next, a second embodiment will be described. FIG. 16 is a cross-sectional view showing a beam through-hole reinforcing metal fitting 42 as a metal fitting forming the beam through-hole reinforcing structure 41 according to the second embodiment, and FIG. 17 is a view taken in the direction of the arrow H in FIG. FIG. 18 is a view taken in the direction of the arrow I in FIG.
In addition, the same number is attached | subjected to the element which fulfill | performs the function similar to the beam through-hole reinforcement metal fitting 2 which concerns on 1st Embodiment, and description is abbreviate | omitted.

  In the second embodiment, only the beam through-hole reinforcing bracket 42 in which the projections 43 are provided on the beam through-hole reinforcing bracket 2 is used as the bracket that forms the beam through-hole reinforcing structure 41.

As shown in FIGS. 16 to 18, a flange portion 6 is provided in the vicinity of the outer periphery of the beam through-hole reinforcing bracket 42, and a protrusion 43 is provided on the flange portion 6.
As shown in FIG. 17, the shape of the protrusion 43 is a concentric blade-like protrusion.

Next, the structure of the beam through-hole reinforcing structure 41 will be described.
FIG. 19 is a cross-sectional view showing the beam 11 provided with the beam through-hole reinforcing structure 41, and FIG. 20 is an enlarged cross-sectional view in the vicinity of the high-strength bolt 19b. In addition, since the shape of the beam 11 is the same as that of the first embodiment, the description thereof is omitted.

  As shown in FIG. 19, the beam through-hole reinforcing bracket 42 is fastened to the beam 11 with a high-strength bolt, and a beam through-hole reinforcing structure 41 is formed with the beam through-hole reinforcing bracket 42 and the high-strength bolt.

Here, as shown in FIG. 20, the protrusion 43 of the beam through-hole reinforcing metal fitting 42 is not easily inserted into the web 13, and the tapered portion 5 is in contact with the edge 21 of the beam through-hole 17.
When the protrusion is inserted, the accuracy error of the beam through-hole 17 contacting the tapered portion 5 can be absorbed. In addition, the protrusions bite also has an effect of preventing the beam through-hole reinforcing bracket 42 from being displaced.
By adopting such a structure, the taper portion 5 of the beam through-hole reinforcing metal fitting 41 and the edge 21 of the beam through-hole 17 can be brought into contact with each other without any gap even when bolted, and the metal reinforcing effect is exhibited. can do.

Thus, according to the second embodiment, the beam through-hole reinforcing metal fitting 42 constituting the beam through-hole reinforcing structure 41 has the taper portion 5 and the protrusion 41, and the protrusion 43 is difficult to insert into the web 13 of the beam 11, The tapered portion 5 is in contact with the edge portion 21 of the through hole 17.
Accordingly, the same effects as those of the first embodiment are obtained.

  In addition, according to the second embodiment, the number of metal fittings constituting the beam through-hole reinforcing structure 41 is only one of the beam through-hole reinforcing metal fittings 42, which is more excellent in cost and workability.

  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.

  For example, in the first embodiment, the beam through-hole reinforcing metal fitting 31 is integrally formed, but may be divided into a plurality of parts.

Sectional view showing beam through-hole reinforcing bracket 2 1. A direction arrow view of FIG. B direction arrow view of FIG. Sectional drawing which shows through-hole reinforcement metal fitting 31 C direction arrow view of FIG. D direction arrow view of FIG. Plan view showing beam 11 CC sectional view of FIG. The top view which shows the beam 11 provided with the beam through-hole reinforcement structure 1 Back view of FIG. FF sectional view of FIG. GG enlarged sectional view of FIG. Modified examples of the taper portion 35 and the contact portion 39 Modified examples of the taper portion 35 and the contact portion 39 Modified examples of the taper portion 35 and the contact portion 39 Sectional drawing which shows beam through-hole reinforcement metal fittings 42 H direction arrow view of FIG. I direction arrow view of FIG. Sectional drawing which shows the beam 11 provided with the beam through-hole reinforcement structure 41 Enlarged sectional view around the high-strength bolt 19b

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Beam through-hole reinforcement structure 2 ......... Beam through-hole reinforcement metal fitting 3 ......... Ring main body 5 ......... Tapered part 7 ......... Through-hole 9a ......... Bolt insertion hole 11 ... …… Beam 13 ……… Web 15a …… Flange 17 ………… Beam through-hole 19a …… High-strength bolt 21 ………… Edge 31 ………… Beam through-hole reinforcing bracket 33 ………… Ring body 35 ………… Tapered portion 35a ...... R portion 37 ......... through hole 39 ......... contact portion 39a ... bolt insertion hole 40 ......... contact portion 40b ... contact portion 41 ......... beam through hole reinforcing structure 42 ......... beam Through-hole reinforcing bracket 43 ......... Protrusions

Claims (4)

Reinforcing metal fittings that reinforce a beam through-hole drilled in a steel beam web,
A first metal fitting and a second metal fitting provided to sandwich the beam;
The first metal fitting is in the shape of a ring having a through hole substantially in the center,
The ring body,
Provided on the outer periphery of the ring body, a flange portion thinner than the ring body,
A taper portion provided between the ring body and the flange portion;
A fastening means insertion hole provided in the flange portion, through which the fastening means is inserted;
Have
The second metal fitting is ring-shaped,
A through hole larger than the inner periphery of the tapered portion of the first metal fitting and smaller than the outer periphery;
A substantially trapezoidal convex portion provided on the inner peripheral side and in contact with the tapered portion of the first metal fitting;
A fastening means insertion hole facing the fastening means insertion hole of the first metal fitting;
A beam through-hole reinforcing metal fitting characterized by having. A beam through-hole reinforcing structure that is provided around a beam through-hole drilled in a steel beam web and reinforces the beam through-hole,
A first metal fitting and a second metal fitting provided to sandwich the beam;
The ring body of the first metal fitting is inserted into the beam through hole,
The second metal fitting, the second metal fitting, and the beam web so that the convex portion thereof contacts the edge of the beam through hole and the taper portion of the first metal fitting. A beam through-hole reinforcing structure characterized by being fastened by fastening means that are inserted in mutually opposing fastening means insertion holes. A ring-shaped reinforcing metal fitting provided around a beam through-hole drilled in a steel beam web and reinforcing the beam through-hole,
The ring body,
A through hole provided in a substantially central portion of the main body;
Provided on the outer periphery of the ring body, and a thinner flange portion than the ring body;
A taper portion provided between the ring body and the flange portion;
A fastening means insertion hole through which a fastening means provided in the flange portion is inserted;
A protrusion provided on the flange portion;
Consists of
The beam through-hole reinforcing metal fitting, wherein the projection is inserted into the web of the beam and the tapered portion contacts an edge of the beam through-hole. A beam through-hole reinforcing structure that is provided around a beam through-hole drilled in a steel beam web and reinforces the beam through-hole,
Beam through-hole reinforcing bracket,
Fastening means that is provided in the beam through-hole reinforcing metal fitting and the web of the beam, and that passes through fastening means insertion holes that face each other;
Consists of
The beam through-hole reinforcing bracket includes a ring body,
A flange portion provided on the outer periphery of the ring body;
A taper portion provided between the ring body and the flange portion;
A protrusion provided on a surface of the flange portion facing the web of the beam;
Have
The beam through-hole reinforcing bracket is fastened by fastening means through which the ring body is inserted into the beam through-hole and through mutually opposing fastening means insertion holes provided in the flange portion and the web of the beam, A beam through-hole reinforcing structure characterized in that a protrusion is inserted into the web of the beam and the tapered portion contacts an edge of the beam through-hole.

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