JP5190651B2 - Wall reinforcement structure - Google Patents

Description

  The present invention relates to a wall reinforcing structure for restraining displacement of a wall in an out-of-plane direction during an earthquake or the like.

In recent years, modern buildings with historical value have been required to be preserved in the original state as much as possible. This type of modern building is often made of multi-layered bricks, especially when the intermediate floor is a wooden floor, when an out-of-plane force is applied to the wall due to an earthquake or the like, the wall is moved out-of-plane. Displacement causes the floor to fall off, resulting in the possibility of the wall collapsing. For this reason, at the time of storage, reinforcement is performed so as to restrain displacement of the wall in the out-of-plane direction.
As a structure to reinforce such a wall, there is a method such as replacing the floor of the intermediate floor with a steel frame, but if it is a plaster ceiling or a hollow type that generates a lot of construction waste, its original There are problems such as loss of design.

Further, for example, in Patent Document 1, a plurality of holes are excavated so as to intersect at the center part in the thickness direction of the brick wall, and a reinforcing bar is inserted after filling these holes with a primer, and an entrance of the hole is made into a brick. A reinforcing structure is shown which is corrected by powder. This reinforcing structure eliminates the need to remove existing brick walls and floors, so there is little generation of construction waste, and it increases the rigidity of the brick walls themselves, so the floor design is not impaired. At the same time, the appearance of the brick wall can be kept almost original.
JP 7-217225 A

  However, in the case of the reinforcing structure shown in Patent Document 1, the strength is ensured by the reinforcing bars inserted in the brick wall, so that the strength cannot be obtained unless the reinforcing bars are long, and such a long reinforcing bar is used. Normally, only one is not sufficient, and it is necessary to embed a plurality. For this reason, there is a problem that the equipment for excavating such a long hole in the wall is increased in size and the workability for excavating a plurality of holes is poor.

  An object of the present invention is to provide a wall reinforcing structure that minimizes the appearance of ceilings and walls, minimizes the generation of construction waste, and is excellent in workability.

The reinforcing structure of the present invention is along a floor installed in a range surrounded by a front wall located when a building is viewed from the front and each side wall arranged so as to be substantially orthogonal to both ends of the front wall. A plurality of fixing anchors for fixing the flat braces to the front wall and the side walls, and edges of the fixing braces fixed to the front walls and the side walls. A sheet-like or plate-like reinforcing member made of reinforcing fibers laid between the reinforcing member , the reinforcing member is arranged in a fiber direction connecting the front wall and the side walls, and the fixing anchor The anchor end portion formed by bundling a plurality of reinforcing fibers is fixedly inserted into the front wall and the holes of the side walls, and the fixing fiber is fanned out from the anchor end portion. The reinforcing member is on the surface Are wearing, the floor is a laminated structure of a plurality of floorboards, said reinforcing member is characterized in that provided between the floorboards.

  In this reinforcing structure, although the design of the surface on the side where the reinforcing member is provided is slightly impaired, the surface on the side where the reinforcing member is not provided can be maintained as the original. In addition, since a part of the floor or wall is not replaced, the generation of construction waste can be minimized. In this case, the flat brace can be installed by fixing the anchoring anchor to the wall and laying the reinforcing member along the floor, and the work is also easy. It should be noted that the workability is further improved when a flat brace is constructed on the upper surface of the floor. In that case, the originality of the ceiling design is maintained.

In addition, with this structure, the hole formed in the wall may be as large as necessary to insert and fix the anchor end of the anchor anchor, and the anchor end is fixed to the wall. A flat brace can be installed by a simple operation of adhering a reinforcing member to the fixing portion spread in a fan shape, and the workability is good.

Further, by sandwiching the reinforcing member between the plurality of floor boards, the appearance of the upper surface of the floor is less likely to be impaired.
Further, the reinforcing fiber is any one of carbon fiber, aramid fiber, and glass fiber.

  According to the wall reinforcing structure of the present invention, the originality of the ceiling and the wall is maintained except for the portion where the reinforcing member is provided, and it is not necessary to replace the floor and the wall, so there is little generation of construction waste and excellent workability. .

Hereinafter, embodiments of the reinforcing structure of the present invention will be described based on the drawings.
In the building 1 shown in FIGS. 1 and 2, the floors 4 on the intermediate floor of the section surrounded by the brick walls 2 and 3, in the illustrated example, the floors 4 on the first floor and the second floor are wooden floors, and support this floor 4. The reinforcing structure of the present invention is applied to the brick walls 2 and 3 that are present. In FIG. 2, 2FL indicates the floor surface position on the second floor, similarly, 1FL indicates the floor surface position on the first floor, B1FL indicates the floor surface position on the first basement floor, and GL indicates the ground position. Reference numeral 5 denotes a girder made of reinforced concrete, and reference numerals 6 to 9 denote openings such as windows provided on the brick wall (a front wall described later) 2.

In the brick walls 2 and 3 shown in FIG. 1, a wall facing the outer surface (right side in FIG. 1) is a front wall 2, and walls on both sides orthogonal to the front wall 2 are side walls 3. In this embodiment, since the front wall 2 may collapse, it shall be reinforced.
That is, a flat brace 11 along the floor 4 is provided on the upper surface of the floor 4 in a range surrounded by the front wall 2 and the front half of the side walls 3 connected to the front wall 2.

The flat brace 11 includes a plurality of fixing anchors 12 for fixing the flat braces 11 to the brick walls 2 and 3, and a sheet-like reinforcing member that is installed between the brick walls 2 and 3 with the edges fixed by the fixing anchors 12. 13.
As shown in FIG. 4, the fixing anchor 12 is formed by bundling a plurality of fiber strands and forming a fan-shaped fixing portion 14 at one end and a rod-shaped anchor end 15 at the other end. It is set as the structure. Each fiber strand is bundled with 12000 to 24000 strands of reinforcing fiber such as carbon fiber, aramid fiber, glass fiber, etc., having a thickness of several μm, and a bundling agent (sizing agent) such as an epoxy resin and a bundle. It is formed into a string shape with a thickness of about 1 mm to 3 mm using a thread. Then, a plurality of the fiber strands are gathered, one end from the central portion is used as a fixing portion 14, and the other end is bundled and a strand binding material is wound to form a rod-like anchor end 15. It is a thing. The fixing unit 14 is in a state where the fiber strands are not bundled, and is spread in a fan shape when used.

  A plurality of holes 16 are formed in the front half portions of the front wall 2 and the side walls 3 from the inner surface of the front wall 2 and the side walls 3 in the thickness direction of the walls 2, 3. When the end portions 15 are respectively inserted and the holes 16 are filled with an adhesive or the like, the anchoring anchor 12 is fixed in a state where the anchor end portions 15 are embedded in the walls 2 and 3. ing. In this case, a plurality of holes 16 are formed at intervals so as to be arranged along the floor 4, and the fan-shaped fixing portions 14 of the fixing anchors 12 are formed in the front wall 2 and the side walls 3. It arrange | positions so that it may become parallel to the surface of the floor 4 toward the inner side from a surrounding surface.

On the other hand, the reinforcing member 13 is formed by arranging the fiber strands made of reinforcing fibers such as carbon fiber, aramid fiber, and glass fiber in one direction, impregnating and curing the epoxy resin, and forming the sheet into a sheet shape. In contrast, a reinforcing effect can be obtained. The reinforcing member 13 is spread along the surface of the floor 4, and the edge thereof is bonded to the fixing portion 14 that is spread out in a fan shape of the fixing anchor 12. In the illustrated example, the two-layer reinforcing member 13 is bonded to the fixing anchor 12 with the fiber directions being substantially orthogonal. As indicated by the oblique lines in FIG. 1, the fiber direction of the reinforcing member 13 is a direction connecting the front wall 2 and each side wall 3, that is, in a direction of 45 ° with respect to the front wall 2 and both reinforcements. The fiber directions of the reinforcing members 13 are arranged so as to be orthogonal to each other between the members 13.
The floor 4 has a structure in which two floor boards 22 are laminated on a plurality of joists 21, and the reinforcing member 13 and the anchor 12 are disposed between the floor boards 22. Has been.
A steel beam 23 is disposed in a direction perpendicular to the front wall 2.

Next, a construction method for reinforcing an existing building will be described.
First, as shown by a two-dot chain line in FIG. 3, one of the two floor boards 22 of the floor 4 is peeled off, and the finishing material 24 provided inside the walls 2 and 3 is left in place. A plurality of holes 16 for fixing the fixing anchor 12 to the brick walls 2 and 3 are formed along the surface of the floor plate 22. These holes 16 are formed so as to be close to the surface of the floor plate 22 and slightly inclined downward in the depth direction as shown in the figure.

Next, the anchor ends 15 of the anchoring anchor 12 are inserted into the holes 16 one by one, and the anchor ends 15 are fixed in the holes 16 by filling the holes 16 with an adhesive. Then, the fixing portions 14 protruding from the holes 16 in the fixing anchors 12 are respectively fanned along the floor plate 22 on the floor plate 22, and the reinforcing member 13 is placed on the floor plate 22. While applying tension in the surface direction, the edge portion is fixed to the fixing portion 14 spread in a fan shape with an adhesive. In this case, the two reinforcing members 13 are laid so that the fiber direction of the reinforcing member 13 is at an angle of 45 ° with respect to the front wall 2 and is orthogonal to each other.
Finally, another floor plate 22 is placed on the reinforcing member 13.

In the structure thus constructed, the front wall 2 is integrally connected to the both side walls 3 by the flat brace 11, and accordingly, is laid between the front wall 2 and the both side walls 3. The floor 4 and the joists 21 are also integrated with both walls 2 and 3, and as a result, the front wall 2 is strongly reinforced.
Next, a case where an external force is applied due to an earthquake or the like in this reinforcing structure will be described. When an external force is exerted outward on the front wall 2 due to this earthquake, both sides of the front wall 2 are supported by orthogonal brick walls 3, so that the vicinity of the center of the front wall 2 is shown in FIG. ) To deform outwardly as indicated by the arrow (A). Since the front wall 2 is integrally connected to both side walls 3 by both reinforcing members 13 installed in a 45 ° direction, the reinforcing member 13 has an arrow ( As shown in (b), when a resistance force is generated in the 45 ° direction and the side walls 3 are pulled by the reinforcing member 13, an arrow (4) between the side walls 3 and the joists 21 The resistance shown in c) acts. As a result, the walls 2 and 3 and the floor 4 are integrated into the flat brace 11 in a rigid structure, and the front wall 2 can be firmly held against the external force indicated by the arrow (A).
In addition, when an external force is applied to deform the front wall 2 inward as shown by an arrow (d) in FIG. 5B, the beam 23 has resistance as shown by an arrow (e). At the same time, as shown by an arrow (f) in the reinforcing member 13, resistance to tension is generated, and deformation of the front wall 2 inward can be prevented.

Thus, by providing the flat brace 11 integrally between the front wall 2 and the side walls 3, even if any external force in the front-rear direction acts on the front wall 2, the front wall 2 causes the flat brace 11 to It is firmly integrated with the both side walls 3 and the floor board 4 through, and as a result, the deformation and collapse of the front wall 2 can be prevented, and consequently the collapse of the building itself having the brick walls 2 and 3 can be prevented. It is.
In addition, the existing building is not destroyed or deformed except that a relatively small diameter hole 16 sufficient to fix the anchor end 15 of the anchor anchor 12 to the brick walls 2 and 3 is generated, and almost no construction waste is generated. In addition, since the flat brace 11 is also covered with the floor plate 22, the design of the existing building can be maintained almost as it is.

In addition, in the reinforcement structure of this invention, it is not restrained by the structure of the said embodiment, In the range which does not deviate from the meaning of this invention, another structure can be employ | adopted.
For example, the reinforcing member and fixing anchor used in the above embodiment are not limited to the above-described carbon fiber, aramid fiber, glass fiber, etc., and other materials can be adopted. As long as the fiber direction can exert a reinforcing effect in a desired direction, there is no question of vertical, horizontal, diagonal, or the like. In addition, a carbon fiber or the like made into a sheet form as a woven fabric may be used as the reinforcing member, or a carbon fiber prepreg whose fiber directions are substantially orthogonal to each other may be laminated into a sheet form. Furthermore, it is good also as a reinforcement member using a steel plate, FRP (fiber reinforced plastic), etc. instead of a sheet | seat. In the above embodiment, two reinforcing members are stacked, but the number of stacked members is not limited.

  Moreover, in the said embodiment, although the example which applied the reinforcement structure which concerns on this invention with respect to the brick wall was shown, it is not restricted to this, Even in the building of a reinforced concrete structure, in the surface of the slab of a earthquake-resistant wall leg part When the strength is insufficient and the shearing force borne by the seismic wall cannot be transmitted to the adjacent frame, the slab shear strength can be increased and improved by applying the reinforcing structure of the present invention. In addition, it can be applied regardless of whether the building is newly established or existing.

It is a cross-sectional view which shows one Embodiment of the reinforcement structure of this invention, and has shown the cross section which follows the AA line of FIG. It is the front view seen from the right side of FIG. It is the longitudinal cross-sectional view which expanded the connection part of the wall and plane brace in the said one Embodiment. FIG. 4 is a transverse sectional view taken along the plane brace of FIG. 3. FIG. 2 is a cross-sectional view similar to FIG. 1 illustrating a mechanism for transmitting a force to a flat brace when an external force such as an earthquake is applied, and shows (a) and (b) by changing the direction of the external force.

Explanation of symbols

1 Building 2 Front wall (brick wall)
3 Side walls (brick walls)
4 Floor 5 Girder 6-9 Opening 11 Flat Brace 12 Anchor Anchor 13 Reinforcing Member 14 Anchoring Part 15 Anchor End 16 Hole 21 joist 22 Floor Plate 23 Beam 24 Finishing Material

Claims (2)

Planar braces are provided along the floor installed in the area surrounded by the front wall located when the building is viewed from the front and the side walls arranged so as to be substantially orthogonal to both ends of the front wall. The flat brace comprises a plurality of fixing anchors for fixing the flat brace to the front wall and the side walls, and an edge portion fixed by the fixing anchors and reinforced between the front wall and the side walls. It is composed of a sheet-like or plate-like reinforcing member made of fiber ,
The reinforcing member is arranged in a fiber direction connecting between the front wall and the side walls,
The anchor anchor has an anchor end portion formed by bundling a plurality of reinforcing fibers fixed in an inserted state in the holes of the front wall and the side walls, and the reinforcing fibers are fanned out from the anchor end portion. The reinforcing member is bonded to the surface of the fixing unit,
The floor is a laminated structure of a plurality of floor boards, and the reinforcing member is provided between the floor boards . The wall reinforcing structure according to claim 1 , wherein the reinforcing fiber is any one of carbon fiber, aramid fiber, and glass fiber .

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