Vibration prevention structure

Abstract

To realize details in consideration of a design while appropriately suppressing floor vibration of a hanging slab, in a vibration prevention structure that prevents vibration of a hanging beam and the hanging slab supported by the hanging beam by connecting the hanging beam hanging outward from an outer column between upper and lower floors by a vibration preventing material.SOLUTION: A vibration prevention structure prevents vibration of a hanging beam 4A and a hanging slab supported by the hanging beam 4A by connecting the hanging beam 4A hanging outward from an outer column between upper and lower floors by a vibration prevention material 10, wherein the vibration prevention material 10 is embedded inside a mullion material 22 in a curtain wall 20 located outside the outer column.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a vibration prevention structure in which a spring beam that protrudes outward from an outer column is connected between upper and lower floors by vibration prevention materials to prevent vibration of the spring beam and the spring slab supported by the spring beam. [Background technology]

[0002] Patent Document 1 (see particularly paragraph 0007, Figures 11, 12, etc.) discloses a configuration in which an internal mullion Ma erected at the end of a balcony has its upper and lower ends connected to the balcony ceiling 3 on the upper floor and the balcony floor 1 on the lower floor by L-shaped brackets 2, thereby functioning as a reinforcing material (vibration prevention material) that reinforces the balconies on each floor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3170569 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, the mullion materials that support curtain walls are mullions that separate exterior materials such as glass, and therefore need to have looseness in the joints with the framework to absorb construction errors. However, as in Patent Document 1, when the mullion materials themselves are used as structural materials such as the reinforcement materials (vibration prevention materials), application becomes difficult because they need to be joined with welding or high-strength bolts to avoid looseness. In addition, if vibration prevention materials are used to connect frameworks, there is a concern that the vibration prevention materials may be placed in positions that are not appropriate from a design perspective. In light of this situation, the main objective of the present invention is to provide a technology for a vibration prevention structure in which a protruding beam that protrudes outward from an exterior column is connected between upper and lower floors with vibration prevention material to prevent vibration of the protruding beam and the protruding slab supported by the protruding beam, which can realize details that take design into consideration while appropriately suppressing floor vibration of the protruding slab. [Means for solving the problem]

[0005] The first characteristic configuration of the present invention is a vibration prevention structure in which a spring beam protruding outward from an outer column is connected between upper and lower floors by a vibration prevention material to prevent vibration of the spring beam and the spring slab supported by the spring beam, The vibration-proofing material is embedded inside the marion material of the curtain wall located outside the exterior columns.

[0006] According to this configuration, instead of using the mullion material itself, which is a mullion that separates exterior materials such as glass at the opening of the curtain wall located outside the exterior columns, as the vibration isolating material, the cantilever beams are firmly connected between the upper and lower floors by the vibration isolating material provided separately from the mullion material, and vibration of the cantilever beams and cantilever slabs can be appropriately prevented. For this reason, the mullion material can be provided with looseness at the joints to the framework to absorb construction errors. And because the vibration isolating material is embedded inside the mullion material, it is possible to prevent the vibration isolating material from being placed in a position that is not appropriate from the design point of view. Therefore, according to the present invention, in a vibration prevention structure in which the spring beams that protrude outward from the exterior columns are connected between the upper and lower floors with vibration prevention materials to prevent vibration of the spring beams and the spring slabs supported by the spring beams, it is possible to realize details that take design into consideration while appropriately suppressing floor vibrations of the spring beams and the spring slabs.

[0007] The second characteristic configuration of the present invention is that the protruding slab is a two-way protruding slab that protrudes in a first horizontal direction and a second horizontal direction intersecting the first horizontal direction, The feature is that the protruding beam is an oblique protruding beam that protrudes from the corner post in an oblique direction that is a combination of the first horizontal direction and the second horizontal direction.

[0008] According to this configuration, for a two-way pop-up slab that pops out in two directions, the first horizontal direction and the second horizontal direction, a diagonal pop-up beam that pops out in the diagonal direction from the corner column is provided and supported by the diagonal pop-up beam, and the diagonal pop-up beam is connected between the upper and lower floors by vibration prevention material, thereby making it possible to appropriately prevent vibration of the diagonal pop-up beam and the two-way pop-up slab supported by the diagonal pop-up beam.

[0009] A third characteristic feature of the present invention is that one of the upper and lower ends of the vibration-isolating material is joined to the protruding beam by a bolt, and the other is joined to the protruding beam by welding.

[0010] According to this configuration, one of the upper and lower ends of the vibration isolating material is joined to the spring beam by a bolt, so that it is possible to appropriately absorb construction errors of the marion material in which the vibration isolating material is built. Meanwhile, the other of the upper and lower ends of the vibration isolating material is joined to the spring beam by welding, so that the end of the vibration isolating material is firmly fixed to the spring beam, and vibration of the spring beam can be appropriately suppressed. Furthermore, by joining the lower end of the vibration isolating material to the lower protruding beam by welding, the welding work at the joint can be carried out easily while facing downward.

[0011] A fourth characteristic feature of the present invention is that the vibration isolating material is made of solid steel.

[0012] According to this configuration, by using solid steel material capable of withstanding both tensile and compressive forces as the vibration isolation material connecting the protruding beams between the upper and lower floors, the vibration isolation material between them can provide an anti-vibration effect for both the upper and lower protruding beams. [Brief description of the drawings]

[0013] [Figure 1] A plan view of a protruding slab portion of a building in which the vibration prevention structure of this embodiment is adopted. [Diagram 2] An enlarged plan view of the corner of the curtain wall of the building shown in Figure 1. [Diagram 3] Enlarged plan view of the diagonal protruding beam [Figure 4] An elevation view taken along arrow a in FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vibration prevention structure according to the present invention will be described with reference to the drawings. As shown in Figure 1, the vibration prevention structure of this embodiment (hereinafter referred to as "this vibration prevention structure") is adopted in a building having a cantilever slab 8 supported by a cantilever beam 4 that protrudes outward from an exterior column 1, as a structure for preventing vibration of the cantilever beam 4 and the cantilever slab 8.

[0015] Furthermore, in this embodiment, the cantilever slab 8 is configured as a two-way cantilever slab 8 that cantilevers in the first horizontal direction X and the second horizontal direction Y that perpendicularly intersects the first horizontal direction X. As the cantilever beam 4, in addition to the first cantilever beam 4X that cantilevers from the outer column 1 in the first horizontal direction X and the second cantilever beam 4Y that cantilevers from the outer column 1 in the second horizontal direction Y, a diagonal cantilever beam 4A that cantilevers from the corner column 2 of the outer column 1 in a diagonal direction (hereinafter sometimes referred to as "cantilever direction A") that is a combination of the first horizontal direction X and the second horizontal direction Y is provided. In addition, a balcony 26 supported by the cantilever beam 4 is provided outside the cantilever slab 8. As shown in Figures 1 and 4, this vibration prevention structure is configured to prevent vibration of the diagonal spring beam 4A and the two-way spring slab 8 supported by the diagonal spring beam 4A by connecting the tip end 4a in the spring direction A of the diagonal spring beam 4A, which springs out from the corner column 2 in a diagonal direction, with vibration prevention material 10 between the upper and lower floors.

[0016] This vibration prevention structure employs a configuration that allows for the realization of design-conscious details while appropriately suppressing floor vibrations of the protruding slab 8, and the configuration is explained below. A building equipped with this vibration prevention structure has a curtain wall 20 located outside the exterior columns 1. The curtain wall 20 is constructed by lining up multiple marion materials at regular intervals between the cantilever slabs 8 of the upper and lower floors, and fitting exterior materials into the openings between adjacent marion materials.

[0017] As shown in FIG. 2, the mullion material 22 installed at the outer corner of the corner column 2 is configured in an arrowhead shape having a corner mullion 23 in which two mutually orthogonal glass sheets 21 are fitted as an exterior material, and a back mullion 24 provided along the inside of the corner mullion 23. The vibration prevention material 10 that connects the tip 4a (see FIG. 4) of the diagonal spring beam 4A between the upper and lower floors is inserted inside the mullion material 22 in the curtain wall 20. More specifically, the corner mullion 23 and the back mullion 24 are made of hollow aluminum extrusions formed by extruding an aluminum alloy, and the vibration prevention material 10 is installed inside the internal space of the back mullion 24. With this configuration, the mullion material 22 itself does not function as a vibration prevention material, but the vibration prevention material 10 provided separately from the mullion material 22 appropriately prevents the vibration of the diagonal spring beam 4A and the two-way spring slab 8. Therefore, for the mullion material 22, looseness can be provided at the joints with the protruding slabs 8 of the upper and lower floors to absorb construction errors. On the other hand, the vibration prevention material 10 is hidden inside the back mullion 24, so deterioration of the design due to exposure to the outside is avoided.

[0018] 2, a positioning plate 25 is provided inside the back mullion 24, with the front surface of the vibration isolating material 10 abutting along the protruding direction A of the vibration isolating material 10. This makes it possible to easily install the vibration isolating material 10 inside the back mullion 24 by abutting the front surface against the positioning plate 25.

[0019] The vibration isolating material 10 is made of solid steel material in the shape of a rod extending in the vertical direction and having a horizontal cross section that is rectangular with a long side parallel to the projection direction A and a short side perpendicular thereto. With this configuration, as shown in Fig. 4, the solid steel material used as the vibration isolating material 10 that connects the tip portions 4a of the projection beams 4A between the upper and lower floors can withstand both tensile and compressive forces, so that the vibration isolating material 10 stretched between the upper and lower projection beams 4A provides a good vibration prevention effect. In order to prevent the vibration isolator 10 from bearing a long-term load, it is desirable to install the vibration isolator 10 after the construction of the building's framework has been completed.

[0020] The method of joining the upper and lower ends of the vibration isolators 10 to the diagonal spring beams 4A on the upper and lower floors in the installation work of the vibration isolators 10 will be described in detail below with reference to Figs. The spring beam 4A is composed of an H-shaped steel having an upper flange 4b ​​and a lower flange 4c, and a connecting member 6 having a T-shaped cross section and an upper flange 6a that is embedded in the spring slab 8 and exposed on the upper surface of the spring slab 8 is welded to the upper surface of the upper flange 4b ​​at the tip 4a of the spring beam 4A. In addition, the lower flange 4c of the spring beam 4A is welded to a plate to make it wider than the upper flange 4b ​​in order to secure a connection portion for the bolt 14 described later.

[0021] The upper end of the vibration isolator 10 is joined to the tip 4a of the upper spring beam 4A by a bolt 14. That is, the upper end of the vibration isolator 10 is provided with an upper end vertical plate 12 welded to the side of the vibration isolator 10 in a vertical position, and an upper end horizontal plate 13 welded to the upper surface of the upper end vertical plate 12 in a horizontal position. The upper end horizontal plate 13 is joined to the lower flange 4c of the spring beam 4A by a bolt 14. In order to allow the joint position of the bolt 14 on the lower flange 4c to be shifted, the diameter of the bolt insertion hole formed in the lower flange 4c has a sufficient clearance with respect to the diameter of the bolt 14. In addition, a high-strength bolt is used as the bolt 14, and in order to compensate for the clearance of the bolt insertion hole formed in the lower flange 4c, a washer is interposed between the bolt 14 and the bolt insertion hole, and the washer is welded to the lower flange 4c. On the other hand, the lower end of the vibration isolator 10 is joined to the tip 4a of the lower protruding beam 4A by a welded portion 16. That is, a lower end vertical plate 15 is provided at the lower end of the vibration isolator 10 and welded to the side of the vibration isolator 10 in a vertical position. This lower end vertical plate 15 is then joined by a welded portion 16 to the upper flange 6a of the joining member 6 joined to the protruding beam 4A.

[0022] In this way, when the upper end of the vibration isolator 10 is joined to the tip 4a of the sprung beam 4A by the bolt 14, the play of the bolt 14 can adequately absorb the construction error of the marion material 22 (see FIG. 2) in which the vibration isolator 10 is built. On the other hand, when the lower end of the vibration isolator 10 is joined to the tip 4a of the diagonal sprung beam 4A by the welded portion 16, the lower end of the vibration isolator 10 is firmly fixed to the tip 4a of the diagonal sprung beam 4A, and the vibration of the diagonal sprung beam 4A is appropriately suppressed. Furthermore, since the lower end of the vibration isolator 10 is joined to the lower diagonal sprung beam 4A by the welded portion 16, the welding work at the welded portion 16 can be easily performed facing downward.

[0023] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied alone, but may also be applied in combination with the configurations of other embodiments.

[0024] (1) In the above embodiment, the vibration-proof material 10 inserted inside the marion material 22 of the protruding corner portion connects the diagonal spring beam 4A protruding diagonally (protruding direction A) from the corner column 2 between the upper and lower floors to prevent vibration of the diagonal spring beam 4A and the two-way spring slab 8 supported by the diagonal spring beam 4A. However, the marion material into which the vibration-proof material 10 is inserted may be a marion material arranged between exterior materials provided on the same surface, rather than a marion material of the protruding corner portion, and the vibration-proof material inserted inside the marion material may connect the spring beam protruding in one direction from the exterior column to prevent vibration of the spring beam and the spring slab protruding in one direction supported by the spring beam.

[0025] (2) In the above embodiment, the vibration isolating material 10 is provided inside the back mullion 24 of the marion material 22. However, the installation position of the vibration isolating material 10 inside the marion material 22 may be changed as appropriate.

[0026] (3) In the above embodiment, the upper end of the vibration prevention material 10 is joined to the upper protruding beam 4A by a bolt 14, and the lower end of the vibration prevention material 10 is joined to the lower protruding beam 4A by a weld 16. However, the method of joining the upper and lower ends of the vibration prevention material 10 to the upper and lower protruding beams 4A may be changed as appropriate.

[0027] (4) In the above embodiment, the upper and lower ends of the vibration isolating material 10 are joined to the tip 4a of the spring beam 4A. However, the joining points of the upper and lower ends of the vibration isolating material 10 to the spring beam 4A may be changed as appropriate.

[0028] (5) In the above embodiment, the vibration isolating member 10 is made of solid steel. However, the vibration isolating member may be made of another material, such as a steel pipe. [Explanation of symbols]

[0029] 2 Corner pillar (outer pillar) 4A Cantilever beam 8. Projecting Slab 10 Anti-vibration material 14 Volts 16 Welding 20. Curtain Wall 22 Mullion wood A. Jumping direction (diagonal) X 1st horizontal direction Y 2nd horizontal direction

Claims

1. A vibration prevention structure in which a spring beam projecting outward from an outer column is connected between upper and lower floors by a vibration prevention material to prevent vibration of the spring beam and the spring slab supported by the spring beam, A vibration prevention structure in which the vibration prevention material is inserted inside the marion material of the curtain wall located outside the exterior columns.

2. The protruding slab is a two-way protruding slab that protrudes in a first horizontal direction and a second horizontal direction intersecting the first horizontal direction, 2. The vibration prevention structure according to claim 1, wherein the protruding beam is an oblique protruding beam protruding from a corner post in an oblique direction that is a combination of the first horizontal direction and the second horizontal direction.

3. 3. The vibration prevention structure according to claim 1, wherein one of the upper and lower ends of the vibration prevention material is joined to the protruding beam by a bolt, and the other is joined to the protruding beam by welding.

4. 4. The vibration prevention structure according to claim 1, wherein the vibration prevention material is made of solid steel.

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