JP6941486B2 - Reinforced concrete beam reinforcement structure - Google Patents

Description

The present invention relates to a reinforcing structure of a reinforced concrete beam.

Patent Document 1 discloses a technique relating to a reinforcing structure in which a reinforcing plate is attached to a member to be reinforced to reinforce it. In this prior art, a steel plate having a notch corresponding to an opening on the side surface of the beam is attached to the side surface of the beam with an adhesive.

Japanese Unexamined Patent Publication No. 2005-83047

The structure in which a steel plate with an insertion hole through which equipment such as piping is inserted is joined to the side surface of the beam to reinforce it is to cut the equipment such as piping and join the steel plate when the equipment such as piping is installed. There is a need.

Even when a pipe or the like is inserted through a through hole, the steel plate of Patent Document 1 can be joined to the side surface of the beam by cutting while avoiding equipment such as the pipe to reinforce the steel plate. However, the reinforcing strength of the steel plate having the notch formed is small.

In view of the above facts, an object of the present invention is to improve the reinforcing strength of a steel plate without cutting the equipment such as piping even when the equipment such as piping inserts a beam made of reinforced concrete.

In the first aspect , a beam having a through hole and a plurality of steel plates having a notch formed on one side are superposed and joined to the beam, and the notch surrounds the through hole. It is a reinforcing structure of a beam including a reinforcing plate material forming an insertion hole.

In the reinforcing structure of the first aspect, by stacking a plurality of steel plates having a notch portion open on one side, an insertion hole surrounding the through hole of the beam is formed at the notch portion. Therefore, even if the pipe or the like is inserted through the through hole, the reinforcing plate material can be joined to the beam by inserting the pipe or the like into the cut portion of the steel plate from the outside of the equipment such as the pipe.

Further, by stacking the steel plates so that the open ends of the cut portions do not overlap, the reinforcing strength is effectively improved.

Therefore, even when equipment such as piping inserts a beam, it is possible to reinforce with a reinforcing plate material without cutting the piping or the like, and the reinforcing strength is improved.

The second aspect is the reinforcing structure of the beam according to claim 1, wherein the reinforcing plate members are provided on both side surfaces of the beam and are connected and joined by through bolts penetrating the beam.

In the reinforcing structure of the second aspect, the reinforcing plate members are provided on both side surfaces of the beam, and are connected and joined by through bolts penetrating the beam. Therefore, the reinforcing strength of the reinforcing plate material is improved.

A third aspect is the beam reinforcing structure according to claim 1 or 2, wherein the insertion hole is oval.

In the reinforcing structure of the third aspect, since the insertion hole is oval, a plurality of pipes and other equipment can be inserted into the insertion hole.

According to the present invention, even when equipment such as piping inserts a beam made of reinforced concrete, it is possible to reinforce the equipment such as piping with a reinforcing plate material without cutting the equipment, and it is possible to improve the reinforcing strength. can.

It is a perspective view of the beam through which the pipe to which the reinforcing structure of the beam of one embodiment is applied is inserted. (A) is a front view of a beam reinforced with the reinforcing plate material of one embodiment, and (B) and (C) are front views of two steel plates constituting the reinforcing plate material. FIG. 3 is a cross-sectional view taken along the line 3-3 of FIG. 2 (A). (A) is a front view of a beam reinforced with a reinforcing plate material of the first modified example, and (B) and (C) are front views of two steel plates constituting the reinforcing plate material. FIG. 3 is a cross-sectional view taken along the line 5-5 of FIG. 3 (A). (A) is a front view of a beam reinforced with a reinforcing plate material of the second modified example, and (B) and (C) are front views of two steel plates constituting the reinforcing plate material. 6 is a cross-sectional view taken along the line 7-7 of FIG. 6 (A). (A) is a front view of the reinforcing plate material of the third modification, (B) is a front view of one steel plate constituting the reinforcing plate material, and (C) is a front view of the other steel plate constituting the reinforcing plate material. Is. (A) is a front view of the reinforcing plate material of the fourth modified example, and (B) and (C) are front views of two steel plates constituting the reinforcing plate material.

<Embodiment>
A beam reinforcing structure according to an embodiment of the present invention will be described. The two orthogonal directions in the horizontal direction are the X direction and the Y direction, and the vertical direction is the Z direction. Further, the X direction is indicated by an arrow X, the Y direction is indicated by an arrow Y, and the Z direction is indicated by an arrow Z.

(structure)
First, the overall structure of the beam reinforcing structure of the present embodiment will be described.

As shown in FIGS. 1, 2 (A) and 3, the reinforced concrete beam 10 is formed with through holes 14 that open on the left and right side surfaces 12. A pipe 20 as an example of equipment is inserted through the through hole 14.

A plurality of reinforcing plate members 50 in which two steel plates 52 are overlapped are joined to both side surfaces 12 of the beam 10. Each steel plate 52 is formed with a U-shaped notch 54 that opens on each of the left and right sides in the drawing.

As shown in FIGS. 1, 2 (B) and 2 (C), the open portion of the cut portion 54 is an open end 54A, the terminal portion is a tip portion 54B, and one side on which the open end 54A is formed is a side. The side portion 56 is used. The two steel plates 52 have the same shape, only the orientation at the time of joining is different.

As shown in FIG. 2A, the tip portion is formed by superimposing the two steel plates 52 constituting the reinforcing plate member 50 with the side portions 56 on which the open end 54A is formed facing each other in the X direction (left-right direction). The 54Bs overlap each other to form an insertion hole 60 that surrounds the through hole 14 on the side surface 12 of the beam 10.

As shown in FIG. 3, in the present embodiment, reinforcing plate members 50 (steel plates 52) are provided on both side surfaces 12 of the beam 10, and are connected and joined by through bolts 62 penetrating the beam 10 (FIGS. 1 and 3). See also FIG. 2 (A)).

As shown in FIGS. 1 and 3, the through bolt 62 is inserted into the bolt hole 18 penetrating the beam 10. In the present embodiment, the bolt hole 18 is filled with the grout material after the through bolt 62 is inserted, but the bolt hole 18 may not be filled.

As shown in FIG. 3, a grout 64 is filled between the side surface 12 of the beam 10 and the reinforcing plate member 50 (steel plate 52). In this embodiment, high-strength non-shrink grout is filled.

(Construction method)
Next, an example of the construction method will be described.

In the present embodiment, as shown in FIG. 1, the existing pipe 20 is inserted into the through hole 14 of the existing beam 10. A reinforcing plate material 50 (steel plate 52) is joined to the existing beam 10 through which the pipe 20 is inserted to reinforce it.

Specifically, as shown by arrows F, the two steel plates 52 are inserted into the notch 54 from the open end 54A from the outside in the radial direction, and the two steel plates are overlapped (see also FIG. 2).

Then, the grout 64 is filled between the side surface 12 of the beam 10 and the reinforcing plate member 50 (steel plate 52), and the glautes 64 are connected and joined by a through bolt 62.

[Action and effect]
Next, the operation and effect of this embodiment will be described.

By superimposing two steel plates 52 having a U-shaped cut portion 54 having an open end 54 A on the side portion 56, the tip portions 54B of the cut portion 54 overlap each other, and the side surface 12 of the beam 10 An insertion hole 60 is formed so as to surround the through hole 14. Therefore, even if the pipe 20 is inserted through the through hole 14, the reinforcing plate material 50 (steel plate 52) is joined to the side surface 12 of the beam 10 by inserting the pipe 20 into the cut portion 54 of the steel plate 52 from the radial outside of the pipe 20. Can be done.

Further, by stacking the steel plates 52 so that the open ends 54A of the cut portion 54 do not overlap, the reinforcing strength is effectively improved.

From another point of view, when viewed from the side surface 12 side (Y direction) of the beam 10, a plurality of (two in this embodiment) steel plates 52 reinforce the periphery of the through hole 14. That is, there is no portion (unreinforced portion) only on the constant surface around the through hole 14.

Therefore, even when the pipe 20 inserts the beam 10, it is possible to reinforce the pipe 20 with the reinforcing plate material 50 in which the insertion hole 60 is formed without cutting the pipe 20, and the reinforcing strength is improved.

Further, in the present embodiment, the reinforcing plate members 50 are provided on both side surfaces 12 of the beam 10, and are connected and joined by through bolts 62 penetrating the beam 10. Therefore, the reinforcing strength is improved as compared with the case where the reinforcing plate material 50 is joined only to one side surface 12.

<Modification example>
Next, a modified example of this embodiment will be described. The same members as those in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted or simplified.

[First modification]
Next, the reinforcing structure of the beam of the first modified example will be described.

As shown in FIG. 4A, the reinforced concrete beam 10 is formed with an oval through hole 114 having an opening in the side surface 12 in the X direction as a longitudinal direction. The "oval" referred to here is a so-called track shape composed of two parallel lines (or substantially parallel lines) of equal length and two semicircles (or substantially semicircles). A plurality of pipes 20 (four in this modification) are inserted in the oval through hole 114 side by side in the X direction.

As shown in FIG. 5, a reinforcing plate member 150 on which two steel plates 152 are overlapped is joined to both side surfaces 12 of the beam 10.

As shown in FIGS. 4 (A), 4 (B) and 4 (C), each steel plate 152 is formed with a U-shaped notch 154 that is open on each of the left and right sides in the drawing. .. As shown in FIGS. 4B and 4C, the open portion of the cut portion 154 is the open end 154A, the terminal portion is the tip portion 154B, the intermediate portion is the intermediate portion 154C, and the open end 154A. One side on which is formed is referred to as a side portion 156. The two steel plates 152 have the same shape, only the orientation at the time of joining is different.

As shown in FIG. 4 (A), the two steel plates 152 constituting the reinforcing plate material 150 are overlapped with the side portions 156 having the open end 154A formed so as to face each other in the X direction (left-right direction) to form the tip portion. The 154Bs and the intermediate portion 154C overlap each other to form an oval-shaped insertion hole 160 that surrounds the oval-shaped through hole 114 on the side surface 12 of the beam 10.

As shown in FIG. 5, reinforcing plate members 150 (steel plates 152) are provided on both side surfaces 12 of the beam 10, and are connected and joined by through bolts 62 penetrating the beam 10 (see also FIG. 4A). .. The through bolt 62 is inserted into a bolt hole 18 that penetrates the beam 10.

Further, a grout (high-strength non-shrinkage grout) 64 is filled between the side surface 12 of the beam 10 and the reinforcing plate member 150 (steel plate 152).

Then, in this modification, by forming the oval-shaped insertion hole 160 in this way, it is possible to insert a plurality of pipes 20 side by side.

[Second modification]
Next, the reinforcing structure of the beam of the second modified example will be described.

As shown in FIG. 6A, the reinforced concrete beam 10 is formed with a through hole 14 that opens to the side surface 12. A pipe 20 is inserted through the through hole 14.

As shown in FIG. 7, a reinforcing plate material 250 in which two steel plates 252 and 253 are superposed is joined to both side surfaces 12 of the beam 10. In the present embodiment, the thickness of the outer steel plate 253 is thicker than the thickness of the inner steel plate 252 (on the beam 10 side). Further, as shown in FIGS. 6 (A), 6 (B) and 6 (C), the vertical length of the steel plate 253 is shorter than the vertical length of the steel plate 252.

As shown in FIGS. 6A and 6B, one of the steel plates 252 is formed with a U-shaped notch 254 that opens to one upper side in the drawing. As shown in FIGS. 6A and 6C, the other steel plate 253 is formed with a U-shaped notch 255 that opens to one lower side in the drawing.

As shown in FIG. 6B, the open portion of the cut portion 254 in one of the steel plates 252 is an open end 254A, the terminal portion is a tip portion 254B, and one side on which the open end 254A is formed is a side portion 256. do. As shown in FIG. 6C, the open portion of the cut portion 255 in the other steel plate 253 is the open end 255A, the terminal portion is the tip portion 255B, and the side on which the open end 255A is formed is the side portion 257. do.

As shown in FIG. 6A, the two steel plates 252 and the steel plate 253 constituting the reinforcing plate material 250 are arranged in the Z direction with the side portion 256 on which the open end 254A is formed and the side portion 257 on which the open end 255A is formed. By superimposing them so as to face each other (in the vertical direction), the tip portion 254B and the tip portion 255B overlap each other, and an insertion hole 60 surrounding the through hole 14 on the side surface 12 of the beam 10 is formed.

As shown in FIG. 7, reinforcing plate members 250 (steel plates 252 and 253) are provided on both side surfaces 12 of the beam 10, and are connected and joined by through bolts 62 penetrating the beam 10 (also in FIG. 6A). reference). The through bolt 62 is inserted into a bolt hole 18 that penetrates the beam 10.

Further, a grout (high-strength non-shrinkage grout) 64 is filled between the side surface 12 of the beam 10 and the reinforcing plate member 250 (steel plate 252, 253).

The two steel plates 252 and 253 are inserted into the cut portions 254 and 255 from the open ends 254A and 255A, respectively, and the pipe 20 is inserted from the Z direction (vertical direction and radial outside), and the two steel plates are overlapped.

[Third variant]
Next, the reinforcing structure of the beam of the third modified example will be described.

As shown in FIG. 8 (A), the reinforcing plate material 350 is composed of two steel plates 352 (FIG. 8 (B)) and a steel plate 353 (FIG. 8 (C)).

As shown in FIGS. 8A and 8B, one of the steel plates 352 is formed with a U-shaped notch 354 having an open end 354A on the lower side 356 in the drawing. .. The terminal portion of the cut portion 354 is referred to as the tip portion 354B.

As shown in FIGS. 8A and 8C, the other steel plate 353 is formed with a U-shaped cut portion 355 having an open end 355A on the right side portion 357 in the drawing. The terminal portion of the cut portion 355 is referred to as the tip portion 355B.

As shown in FIG. 8A, the two steel plates 352 and the steel plate 353 constituting the reinforcing plate material 350 are formed by a side portion 356 formed with an open end 354A and a side portion 357 formed with an open end 355A. By superimposing them so as to be adjacent to each other, the tip portion 354B and the tip portion 355B overlap each other, and a substantially circular insertion hole 360 is formed.

Although not shown, the through holes on the side surface 12 of the beam 10 are formed by superimposing the two steel plates 352 and 353 constituting the reinforcing plate material 350, as in the above-described embodiment, the first modification and the second modification. An insertion hole 360 is formed that surrounds 14 (see FIG. 1 and the like).

Also in this modified example, reinforcing plate members 350 are provided on both side surfaces 12 (see FIG. 1 and the like) of the beam 10, and are connected and joined by through bolts 62 (see FIG. 1 and the like) penetrating the beam 10. The through bolt 62 is inserted into a bolt hole 18 that penetrates the beam 10 (see FIG. 1 and the like). Further, a grout (high-strength non-shrinkage grout) 64 (see FIG. 3 etc.) is filled between the side surface 12 of the beam 10 (see FIG. 3 etc.) and the reinforcing plate member 350.

In this modification, one steel plate 352 inserts the pipe 20 (see FIG. 1 and the like) into the cut portion 354 from the open end 354A from the Z direction (vertical direction), and the other steel plate 353 is inserted from the open end 355A. Insert the pipe 20 (see FIG. 1 and the like) into the notch 355 from the X direction (left-right direction) and superimpose the two sheets.

[Fourth variant]
Next, the reinforcing structure of the beam of the fourth modified example will be described.

As shown in FIG. 9A, the reinforcing plate material 450 is composed of two steel plates 452 (FIGS. 9B and 9C).

As shown in FIGS. 9B and 9C, the two steel plates 452 are formed with a cut portion 454 having an open end 454A on each of the left and right side portions 456 in the drawing. The tip portion 454B of the cut portion 454 is bent in the vertical direction. The two steel plates 452 have the same shape, only the orientation at the time of joining is different.

As shown in FIG. 9A, the two steel plates 452 constituting the reinforcing plate material 450 are overlapped with the side portions 456 having the open end 454A formed so as to face each other in the left-right direction, so that the tip portions 454B overlap each other. , The insertion hole 60 is formed.

Although not shown, as in the above-described embodiment, the first modification and the second modification, the through holes 14 (through holes 14) on the side surface 12 of the beam 10 are formed by superimposing the two steel plates 452 constituting the reinforcing plate material 450. An insertion hole 60 is formed so as to surround the circumference (see FIG. 1 and the like).

Also in this modified example, reinforcing plate members 450 are provided on both side surfaces 12 (see FIG. 1 and the like) of the beam 10, and are connected and joined by through bolts 62 (see FIG. 1 and the like) penetrating the beam 10. The through bolt 62 is inserted into a bolt hole 18 that penetrates the beam 10 (see FIG. 1 and the like). Further, a grout (high-strength non-shrinkage grout) 64 (see FIG. 3 and the like) is filled between the side surface 12 of the beam 10 (see FIG. 3 and the like) and the reinforcing plate material 450.

In this modified example, in the steel plate 452, the pipe 20 (see FIG. 1 and the like) is inserted into the cut portion 454 from the open end 454A from the X direction (horizontal direction, radial outside), and then in the Z direction (vertical direction). ) And overlap the two.

<Others>
The present invention is not limited to the above embodiment.

For example, in the above embodiment and the modified example, the pipe 20 is inserted through the through hole 14, but the through hole 14 is not limited to this, even if equipment other than the pipe 20, for example, wiring is inserted through the through hole 14. good.

Further, for example, in the above-described embodiment and the modified example, all the reinforcing plate members are provided on both side surfaces 12 of the beam 10, and are connected and joined by through bolts 62, but the present invention is not limited to this. For example, a reinforcing plate material may be joined to either side surface 12. Further, the reinforcing plate material may be joined with an adhesive or the like.

Further, for example, in both the above-described embodiment and the modified example, the beam 10 is joined to the left and right side surfaces 12, but if through holes are opened in the upper and lower side surfaces, the reinforcing plate material may be joined to the upper and lower side surfaces. good.

Further, for example, in the above-described embodiment and the modified example, the reinforcing plate material has a structure in which two steel plates are superposed, but the present invention is not limited to this. It may have a structure in which three or more steel plates are superposed.

In short, it may be a reinforcing plate material in which a plurality of steel plates having a cut portion formed on one side are superposed and joined to the beam to form an insertion hole surrounding the through hole at the cut portion. From another point of view, it is sufficient that the circumference of the through hole is reinforced by a plurality of steel plates when viewed from the side surface side of the beam. That is, it is sufficient that there is no portion (unreinforced portion) only on the constant surface around the through hole.

Further, it can be carried out in various embodiments without departing from the gist of the present invention.

10 Beam 14 Through hole 52 Steel plate 54 Cut part 50 Reinforcing plate material 60 Insertion hole 62 Through bolt 114 Through hole 150 Reinforcing plate material 152 Steel plate 154 Cut part 160 Insertion hole 250 Reinforcing plate material 252 Steel plate 254 Cut part 350 Reinforcing plate material 352 Steel plate 354 Cut part 355 Cut part 360 Insertion hole 450 Reinforcing plate material 452 Steel plate 454 Cut part

Claims (5)

A reinforced concrete beam with a rectangular cross section and a through hole that opens on the side,
With the piping or wiring inserted through the through hole,
A plurality of steel plates having a notch formed on one side are superposed and joined to the side surface of the beam, and the notch is inserted into the pipe or the wiring and surrounds the pipe or the wiring. Reinforcing plate material that forms the insertion hole and
Reinforcing structure reinforced concrete beams with a. The reinforcing plate members are provided on the side surfaces on both sides of the beam, and are connected and joined by through bolts penetrating the beam.
Reinforced structure of a reinforced concrete beam according to claim 1. The insertion hole is a track-shaped oval composed of two parallel lines or substantially parallel lines of equal length and two semicircles or substantially semicircles.
A plurality of the pipes or the wirings are inserted side by side in the oval insertion hole.
The reinforced concrete beam reinforcing structure according to claim 1 or 2. A grout is filled between the reinforcing plate material and the side surface of the beam.
The reinforced concrete beam reinforcing structure according to any one of claims 1 to 3. The reinforcing plate material is composed of two rectangular steel plates having a U-shaped notch formed on one side.
The reinforced concrete beam reinforcing structure according to any one of claims 1 to 4.

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