JP2024072658A - Suspension body reinforcement structure - Google Patents

Abstract

To suppress the shake of a suspension body at the time of earthquake while reducing the number of members.SOLUTION: A suspending body reinforcement structure includes: a suspension shelf 50 which has outer peripheral frames 56 arranged along an outer peripheral part of a structure 10, and is suspended on outer peripheral girders 22 and beams 42 through a plurality of suspension materials 60; vertical furring strips 70 which are mounted on the outer peripheral frames 56 and support an exterior material 72; and a pair of bracing materials 80 which extend obliquely downward toward both sides of side columns 20 from the beams 42 positioned on the indoor side of the side columns 20 of the structure 10, and are connected to the outer peripheral frames 56.SELECTED DRAWING: Figure 2

Description

The present invention relates to a hanging body reinforcement structure.

Suspended ceilings that are suspended from ceiling slabs, beams, and other structural members via suspension members are known (see, for example, Patent Document 1).

There is also a hanging shelf (grapevine shelf) that is suspended from the main body via a hanging member (see, for example, Patent Document 2).

JP 2020-165110 A JP 2014-105506 A

However, if a suspended object such as a suspended shelf or suspended ceiling is adjacent to the vertical furring strips supporting the exterior wall, there is a possibility that the vertical furring strips and the suspended object may interfere with each other during an earthquake.

One possible solution to this problem is to reinforce the hanging material and the hanging body with vertical and horizontal braces to suppress the swinging of the hanging body during an earthquake.

However, in this case, the number of components such as vertical braces and horizontal braces will increase.

Taking the above facts into consideration, the present invention aims to reduce the number of components while suppressing the swing of the hanging body during an earthquake.

The suspension body reinforcement structure described in claim 1 has a peripheral frame arranged along the periphery of the structure and includes a suspension body suspended from the main body via multiple suspension members, vertical furring strips attached to the peripheral frame and supporting the exterior material, and a pair of diagonal brace members extending diagonally downward from a beam or ceiling slab located on the interior side of the side columns of the structure, toward both sides of the side columns, and connected to the peripheral frame.

According to the hanging body reinforcement structure of claim 1, the hanging body is suspended from the main body via a plurality of hanging members. This hanging body has a peripheral frame that is arranged along the periphery of the structure. Vertical furring strips that support the exterior material are attached to the peripheral frame.

Here, a pair of diagonal brace members extend diagonally downward from the beams or ceiling slab located on the interior side of the side columns of the structure, toward both sides of the side columns, and are connected to the perimeter frame. By reinforcing the perimeter frame with this pair of diagonal brace members, it is possible to efficiently suppress horizontal vibration of the perimeter frame in two directions during an earthquake.

Therefore, in the present invention, the number of components can be reduced compared to a configuration in which the hanging body is reinforced by vertical and horizontal braces.

Furthermore, as mentioned above, vertical furring strips are attached to the outer peripheral frame of the hanging body. In other words, in this invention, the outer peripheral frame of the hanging body also functions as a vibration prevention material for the vertical furring strips. Therefore, in this invention, the vibration prevention material for the vertical furring strips can be omitted, further reducing the number of components.

The hanging body reinforcement structure described in claim 2 is the hanging body reinforcement structure described in claim 1, in which the lower end of the diagonal brace material is connected to the connection part between the outer peripheral frame and the hanging material.

According to the hanging body reinforcement structure of claim 2, the lower end of the diagonal brace material is connected to the connection between the outer peripheral frame and the hanging material. This makes it possible to efficiently suppress the horizontal vibration of the hanging material in two directions during an earthquake. Therefore, the vibration of the outer peripheral frame during an earthquake is further suppressed.

The hanging body reinforcement structure described in claim 3 is the hanging body reinforcement structure described in claim 1 or claim 2, in which the hanging body has an internal frame arranged in a direction intersecting the outer peripheral frame, and the lower end of the diagonal brace material is connected to the connection part between the outer peripheral frame and the internal frame.

According to the hanging body reinforcement structure of claim 3, the hanging body has an internal frame that extends in a direction intersecting with the outer peripheral frame. The lower end of the diagonal brace material is connected to the connection between the outer peripheral frame and the internal frame. This further suppresses the vibration of the outer peripheral frame during an earthquake.

As explained above, the present invention makes it possible to reduce the number of components while suppressing the swing of the hanging body during an earthquake.

1 is a plan cross-sectional view showing a certain floor of a structure to which a suspension body reinforcement structure according to one embodiment is applied. FIG. 2 is a cross-sectional plan view showing the hanging shelf of the structure shown in FIG. 1 . This is a cross-sectional view taken along line 3-3 in Figure 2. FIG. 4 is a cross-sectional view corresponding to FIG. 3 and showing a structure according to a comparative example.

Hereinafter, one embodiment will be described with reference to the drawings. Note that the arrow X direction and the arrow Y direction shown in each drawing indicate two horizontal directions that are perpendicular to each other.

(Structure)
1 shows a predetermined floor of a structure 10 according to this embodiment. The structure 10 includes a plurality of side columns 20 and a plurality of center columns 30. The side columns 20 are arranged at intervals on the outer periphery of the structure 10. Periphery girders 22 are installed between adjacent side columns 20. These side columns 20 and outer periphery girders 22 form a frame (periphery frame) that runs along the outer periphery of the structure 10.

Center posts 30 are arranged on the interior side of each side post 20. The center posts 30 are arranged at intervals in the arrangement direction of the side posts 20 (arrow Y direction). A girder 32 is installed between adjacent center posts 30. These center posts 30 and girders 32 form a frame.

The multiple center columns 30 face each of the multiple side columns 20. A girder 40 is installed between the opposing side columns 20 and center columns 30. The side columns 20, center columns 30, and girder 40 form a frame. In addition, multiple small beams 42 (see Figure 2) are installed between adjacent girder 40.

The girders 32, 40 and the small beams 42 support the ceiling slab 12 (see Figure 3). The ceiling slab 12, the girders 32, 40 and the small beams 42 are an example of a structure. The side columns 20, the center columns 30, the girders 32, 40 and the small beams 42 are, as an example, made of steel, but may be made of reinforced concrete or steel-reinforced concrete.

(Hanging shelf)
As shown in Fig. 2, a predetermined floor of the structure 10 is a large space floor such as a hall. A hanging shelf (grapevine shelf) 50 is provided on the upper part of the predetermined floor of the structure 10. The hanging shelf 50 is suspended from the above-mentioned outer perimeter girder 22, girders 32, 40, and minor beam 42 (see Fig. 1) via a plurality of suspension members 60. The hanging body reinforcement structure according to this embodiment is applied to the hanging shelf 50.

In this embodiment, the hanging material 60 is formed from an H-shaped steel. However, the hanging material 60 is not limited to an H-shaped steel, and may be, for example, other shaped steel, steel pipe, or a hanging bolt. The hanging shelf 50 is an example of a hanging body.

The hanging shelf 50 has multiple internal frames 52 and multiple outer peripheral frames 56. The multiple internal frames 52 and the multiple outer peripheral frames 56 are formed, for example, from square steel pipes. The multiple internal frames 52 are connected in a lattice shape in a plan view. The outer peripheral frames 56 are provided on the outer periphery of the internal frames 52 connected in this lattice shape.

Note that the hanging shelf 50 (internal frame 52 and peripheral frame 56) is omitted from Figure 1.

As shown in FIG. 3, a plurality of ceiling base members 54 are provided on the underside of the internal frame 52. As an example, the ceiling base members 54 are formed from C-shaped steel and are bridged between adjacent internal frames 52. A ceiling material (not shown) is attached to the ceiling base members 54.

In FIG. 2, the ceiling base material 54 is not shown. Also, the ceiling base material 54 can be omitted.

The outer perimeter frames 56 are arranged along the outer perimeter of the structure 10 (in the direction of the arrow Y in FIG. 2). The outer perimeter frames 56 are also arranged between adjacent side posts 20. In other words, the outer perimeter frames 56 are arranged on both sides of the side posts 20. Each outer perimeter frame 56 is not joined to the side posts 20, and is structurally separated from the side posts 20.

Multiple (two in this embodiment) internal frames 52 are connected to each outer perimeter frame 56. The multiple internal frames 52 are arranged on the indoor side of each outer perimeter frame 56 along a direction (arrow X direction) that intersects with the outer perimeter frame 56 (approximately perpendicular in this embodiment). In other words, the internal frames 52 extend from the outer perimeter frame 56 toward the indoor side. These internal frames 52 are arranged at intervals in the longitudinal direction of the outer perimeter frame 56 (arrow Y direction in Figure 2).

In this embodiment, as shown in FIG. 2, the internal frame 52 and the hanging members 60 are joined at a position that divides the outer peripheral frame 56 into approximately three equal parts. However, the number and arrangement of the internal frames 52 and the hanging members 60 can be changed as appropriate.

As shown in FIG. 3, one end of the inner frame 52 in the longitudinal direction is connected to the middle part of the outer peripheral frame 56 in the longitudinal direction. Specifically, a bracket 58 extending toward the inside of the room is provided at the connection part J between the outer peripheral frame 56 and the inner frame 52. One end of the inner frame 52 is connected to this bracket 58 with a bolt and a nut.

The connection J between the outer perimeter frame 56 and the internal frame 52 is suspended from the outer perimeter girder 22 via a suspension member 60. Specifically, the outer perimeter girder 22 is formed of an H-shaped steel. The outer perimeter girder 22 has an upper flange portion 22A and a lower flange portion 22B that face each other in the vertical direction, and a web portion 22C that connects the upper flange portion 22A and the lower flange portion 22B.

A bracket 58 extending upward is provided at the connection J between the outer frame 56 and the inner frame 52. The lower end of the hanging material 60 is connected to this bracket 58 with a bolt and a nut.

The upper end of the hanging member 60 is connected by a bolt and nut to a bracket 24 that extends downward from the underside of the lower flange portion 22B of the outer perimeter girder 22. The connection portion J between the outer perimeter frame 56 and the internal frame 52 is suspended and supported by this hanging member 60.

The longitudinal middle portion of the internal frame 52 is suspended from the small beam 42 via a hanging member 60. Specifically, the small beam 42 is formed of an H-shaped steel. The small beam 42 has an upper flange portion 42A and a lower flange portion 42B that face each other in the vertical direction, and a web portion 42C that connects the upper flange portion 42A and the lower flange portion 22B.

A bracket 53 extending upward is provided at the connection portion S between the internal frame 52 and the hanging material 60. The lower end of the hanging material 60 is connected to this bracket 53 with a bolt and a nut.

The upper end of the hanging member 60 is connected by a bolt and nut to a bracket 48 that extends downward from the underside of the lower flange portion 22B of the small beam 42. The middle portion of the internal frame 52 is suspended and supported by this hanging member 60.

(Vertical furring strip)
2, a plurality of vertical furring strips 70, which are base materials for exterior materials 72, are attached to the exterior side of the peripheral frame 56. The vertical furring strips 70 are formed of C-shaped steel, for example. The vertical furring strips 70 are arranged in the up-down direction and spaced apart in the longitudinal direction of the peripheral frame 56 (arrow Y direction).

As shown in FIG. 3, the vertical furring strips 70 are attached to the joint J between the outer frame 56 and the inner frame 52. Specifically, the vertical furring strips 70 are connected by bolts and nuts to brackets 59 that extend from the joint J between the outer frame 56 and the inner frame 52 to the outside of the room.

The vertical furring strips 70 are not limited to being attached to the connection J between the outer frame 56 and the internal frame 52, but may be attached to other parts of the outer frame 56. In this embodiment, as shown in FIG. 2, the vertical furring strips 70 are also arranged on the exterior side of the side posts 20. The vertical furring strips 70 are attached to brackets (not shown) that extend from the side posts 20 to the exterior side.

(Exterior materials)
An exterior material 72 is disposed on the outdoor side of the vertical furring strips 70. The exterior material 72 is formed of an exterior wall panel such as ALC. The exterior material 72 is attached to the outdoor side of the multiple vertical furring strips 70 with screws or the like (not shown), and is supported by the multiple vertical furring strips 70.

(Brace material)
2, a plurality of knee brace members 80 are provided on the outer periphery of the hanging shelf 50. The plurality of knee brace members 80 are reinforcing members (stiffening members) that suppress the swaying (deformation) of the outer periphery frames 56 that are respectively arranged on both sides of the side columns 20. Each knee brace member 80 is formed of, for example, H-shaped steel, C-shaped steel, steel pipe steel, etc., and is capable of bearing tensile and compressive forces.

A pair of diagonal brace members 80 extend diagonally downward from the joint between the main beam 40 and the small beam 42 located on the interior side of the side column 20 toward both sides of the side column 20 and are connected to the outer perimeter frames 56 located on both sides of the side column 20.

Specifically, as shown in FIG. 3, a gusset plate 44 that protrudes toward the side column 20 is provided at the joint (end) of the small beam 42 with the main beam 40. The gusset plate 44 is disposed between the upper flange portion 42A and the lower flange portion 42B of the small beam 42, and is joined to the upper flange portion 42A, the lower flange portion 42B, and the web portion 42C by welding or the like. The upper end of the diagonal brace material 80 is connected to the upper end of the gusset plate 44 by bolts and nuts.

Note that a reinforcing rib 46 is provided on the side of the small beam 42 opposite the gusset plate 44, but the reinforcing rib 46 can be omitted as appropriate. Also, the small beam 42 and the diagonal brace material 80 may be joined by welding or the like, rather than by bolts and nuts.

The lower end of the knee brace material 80 is connected to the connection J between the outer peripheral frame 56 and the internal frame 52. Specifically, a gusset plate 44 is provided at the connection J between the outer peripheral frame 56 and the internal frame 52. The lower end of the knee brace material 80 is connected to this gusset plate 44 with a bolt and a nut. As described above, the lower end of the hanging material 60 is connected to the connection J between the outer peripheral frame 56 and the internal frame 52.

(Action)
Next, the operation of this embodiment will be described.

First, a structure 100 according to a comparative example will be described. FIG. 4 shows a structure 100 according to a comparative example. In this structure 100, anti-sway materials (horizontal members) 102 are installed between adjacent side columns 20, and the anti-sway materials 102 support the vertical furring strips 70, thereby suppressing the vibration of the vertical furring strips 70.

Here, in the structure 100 according to the comparative example, the outer peripheral frame 112 of the hanging shelf 110 is arranged adjacent to the vertical furring strips 70. In this case, there is a possibility that the vertical furring strips 70 and the outer peripheral frame 112 may interfere with each other during an earthquake. As a countermeasure to this, in the structure 100 according to the comparative example, the outer peripheral portion of the hanging shelf 110 is reinforced by a vertical brace 120 and a horizontal brace (not shown). This suppresses interference between the vertical furring strips 70 and the outer peripheral frame 112 during an earthquake.

However, in the structure 100 of the comparative example, the number of components such as the vertical braces 120 and horizontal braces increases. The vertical braces 120 are arranged on a vertical structural plane along the direction of the arrow X.

In contrast, the hanging shelf 50 of this embodiment has a peripheral frame 56 that is arranged along the outer periphery of the structure 10, as shown in FIG. 3. The peripheral frame 56 has vertical furring strips 70 attached thereto that support the exterior material 72.

The pair of diagonal brace members 80 extend diagonally downward from the joint between the main beam 40 and the minor beam 42 located on the interior side of the side column 20 of the structure 10, toward both sides of the side column 20, and are connected to the outer perimeter frame 56. The pair of diagonal brace members 80 reinforce the outer perimeter frame 56, so that the vibration of the outer perimeter frame 56 in two horizontal directions (the directions of the arrows X and Y) during an earthquake can be efficiently suppressed.

Therefore, in this embodiment, the number of components can be reduced compared to a configuration in which the hanging shelf 110 is reinforced by a vertical brace 120 and a horizontal brace, as in the structure 100 of the comparative example.

Furthermore, as described above, the vertical furring strips 70 are attached to the outer peripheral frame 56 of the hanging shelf 50. In other words, in this embodiment, the outer peripheral frame 56 of the hanging shelf 50 also functions as a vibration prevention material for the vertical furring strips 70. Therefore, in this embodiment, the vibration prevention material for the vertical furring strips 70 can be omitted, further reducing the number of components.

The lower end of the diagonal brace material 80 is connected to the connection part J between the outer frame 56 and the internal frame 52. This makes it possible to efficiently suppress the horizontal vibration of the hanging material 60 in two directions during an earthquake. Therefore, the vibration of the outer frame 56 during an earthquake is further suppressed.

The hanging shelf 50 further has an internal frame 52 that extends in a direction intersecting with the outer peripheral frame 56. The lower end of the diagonal brace material 80 is connected to the connection J between the outer peripheral frame 56 and the internal frame 52. This further suppresses the vibration of the outer peripheral frame 56 during an earthquake.

(Modification)
Next, a modification of the above embodiment will be described.

In the above embodiment, the lower end of the diagonal brace material 80 is connected to the connection part J between the outer peripheral frame 56 and the internal frame 52 of the hanging shelf 50. However, the lower end of the diagonal brace material 80 is not limited to the connection part J between the outer peripheral frame 56 and the internal frame 52, and may be connected to another part of the outer peripheral frame 56.

Similarly, in the above embodiment, the lower end of the diagonal brace material 80 is connected to the connection part J between the outer peripheral frame 56 and the internal frame 52 of the hanging shelf 50. However, the lower end of the diagonal brace material 80 is not limited to the connection part J between the outer peripheral frame 56 and the internal frame 52, and may be connected to another part of the outer peripheral frame 56.

In the above embodiment, the upper end of the diagonal brace material 80 is connected to the joint (end) of the minor beam 42 with the main beam 40. However, the upper end of the diagonal brace material 80 is not limited to the joint of the minor beam 42 with the main beam 40, and may be connected, for example, to the joint of the main beam 40 with the minor beam 42, another part of the main beam 40, or the ceiling slab 12 around the main beam 40.

In addition, in the above embodiment, the outer perimeter frame 56 is disposed between adjacent side posts 20. However, the outer perimeter frame 56 is not limited to being disposed between adjacent side posts 20, and may be disposed, for example, on the interior side of the side posts 20. In this case, the outer perimeter frame 56 may be continuous without being divided at the position of the side posts 20.

In addition, the hanging shelf 50 in the above embodiment may be covered with a ceiling material or a floor material. In addition, in the above embodiment, the hanging body is the hanging shelf 50. However, the hanging body is not limited to the hanging shelf 50, and may be a suspended ceiling.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and one embodiment and various modified examples may be used in appropriate combination, and the present invention may of course be embodied in various forms without departing from the spirit of the present invention.

10 Structure 20 Side column 12 Ceiling slab 50 Hanging shelf (hanging body)
52 Internal frame 56 Periphery frame 60 Hanging material 70 Vertical furring strip 72 Exterior material 80 Diagonal brace material J Connection part (connection part between the peripheral frame and the hanging material,
(Connection between the outer frame and the inner frame)

Claims (3)

A hanging body having an outer periphery frame arranged along the outer periphery of a structure and hung from a skeleton via a plurality of hanging members;
A vertical furring strip attached to the outer perimeter frame and supporting the exterior material;
A pair of diagonal brace members extending diagonally downward from a beam or ceiling slab located on the indoor side of the side column of the structure toward both sides of the side column and connected to the outer perimeter frame;
A suspension body reinforcement structure comprising: The lower end of the knee brace material is connected to the connection portion between the outer periphery frame and the hanging material.
The suspension structure according to claim 1 . The hanging body has an inner frame arranged along a direction intersecting the outer peripheral frame,
The lower end of the knee brace material is connected to the connection portion between the outer periphery frame and the inner frame.
The reinforcing structure for a suspender according to claim 1 or 2.