JP2020090812A - Vibration control structure - Google Patents

Abstract

To provide a vibration control structure capable of sufficiently obtaining a damping effect of a vibration damper.SOLUTION: A vibration control structure 10 has a base 16, a beam column frame 14 vertically arranged from the base 16, a wall body 24 vertically arranged from the base 16 and separated from the beam column frame 14, a wall side bracket 26 provided on the top of the wall body 24, embedded into the wall body 24 on the lower side, and projected upwardly from the top surface on the top side of the wall body 24, a vibration damper 30 coupled to the wall side bracket 26 at one end and coupled to the beam column frame 14 at the other end, and controls relative displacement of the wall body 24 and the beam column frame 14, and diagonal members 44L,R embedded into the wall body 24, coupled to the base 16 at one end, adjacent or coupled to the wall side bracket 26 at the other end, and bearing tensile force to transmit, to the base 16, shearing force of the wall side bracket 26 associated with the relative displacement of the wall side bracket 26 and the base 16.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vibration damping structure.

In order to reduce the shaking of the building during an earthquake, etc., a vibration damper may be placed between the frame of the building, that is, the column-beam structure and the wall to suppress the shaking of the column-beam structure (for example, a patent Reference 1).
In order to sufficiently exert the vibration damping effect of such a vibration damper, the vibration damper sufficiently deforms (expands and contracts) when the column-beam frame structure and the wall body are relatively displaced to absorb vibration energy. There is a need.
When the column-beam frame structure and the wall are relatively displaced, the wall may be pushed back and deformed by the reaction force received from the vibration damper.
As a result, the vibration damper may not be sufficiently deformed, and the vibration energy may not be sufficiently absorbed. In addition, it is necessary to construct a mechanism that transmits the reaction force of the vibration damper to the lower structure.

JP-A-9-170353

In view of the above facts, the present invention is to provide a vibration damping structure in which the vibration damping effect of the vibration damping damper is sufficiently obtained and the reaction force of the vibration damping damper is efficiently transmitted to the lower structure.

The damping structure according to claim 1, wherein a lower structure, a post beam frame erected from the lower structure, a pedestal erected from the lower structure and separated from the post beam frame, A receiving member which is provided on an upper portion of the pedestal, a lower side of which is embedded in the pedestal and an upper side of which is projected upward from an upper surface of the pedestal, and one end of which is connected to the receiving member and the other end of which is connected to the post beam frame. A damping damper that suppresses relative displacement between the receiving member and the post beam frame, and is embedded in the pedestal, one end is connected to the lower structure, the other end is adjacent to or connected to the receiving member, A diagonal member that bears tension and directly transmits the shearing force of the pedestal accompanying the relative displacement of the receiving member and the lower structure to the lower structure.

In the vibration damping structure according to claim 1, for example, when the column-beam frame is swayed due to an earthquake, a strong wind, or the like, and a relative displacement occurs between the lower structure and the column-beam frame, the vibration damper releases vibration energy. Absorb and suppress the relative displacement. As a result, the sway of the column-beam structure is reduced.

When the vibration damper suppresses the relative displacement, the pedestal connected to the vibration damper via the receiving member receives a reaction force from the vibration damper via the receiving member. When the pedestal has low rigidity, the pedestal may be deformed by receiving a reaction force from the vibration damper.

Here, if the pedestal to which the vibration damper is attached is deformed, the input to the vibration damper is reduced and a large damping force cannot be obtained.
In the vibration damping structure according to the first aspect, the pedestal is constructed of a reinforced concrete wall to suppress shear deformation. Further, since the diagonal member whose one end is connected to the lower structure and the other end is close to or connected to the receiving member is embedded in the pedestal, the diagonal member bears the tension when the column-frame structure shakes. Then, the reaction force from the vibration damper is directly transmitted to the lower structure.
As a result, the load (horizontal load due to earthquake, strong wind, etc.) can be efficiently transmitted to the vibration damper, and the damping force can be reliably obtained in the vibration damper.

According to a second aspect of the present invention, in the vibration damping structure according to the first aspect, the direction of the relative displacement is an in-plane direction of the pedestal, and the receiving member is arranged at the center of the pedestal. The diagonal member embedded in the pedestal is opposite to a first diagonal member portion inclined from the receiving member toward the lower structure, and a first diagonal member portion extending from the receiving member toward the lower structure. And a second diagonal member inclined in the direction.

In the vibration damping structure according to claim 2, when the column-beam frame structure is relatively displaced with respect to the lower structure, the first diagonal member portion or the second diagonal member portion inclined in a direction opposite to the displacement bears the tension. , Directly to the lower structure.

According to a third aspect of the present invention, in the vibration control structure according to the first or second aspect, a stopper that limits relative displacement between the pedestal and the column beam frame is provided on the pedestal or the column beam frame. Has been.

In the vibration damping structure according to the third aspect, the stopper limits the relative displacement between the pedestal and the beam structure. As a result, damage to the vibration damper can be prevented.

As described above, according to the damping structure of the present invention, the damping effect of the damping damper can be sufficiently obtained.

It is a front view showing a damping structure concerning a 1st embodiment of the present invention. (A) is a top view showing the vicinity of a vibration damper of a vibration control structure, (B) is a horizontal cross-sectional view showing the vicinity of the upper end of the wall, and (C) is a vertical cross-sectional view of the vicinity of the upper end of the wall. Is. (A) is a perspective view showing a receiving member, and (B) is a side view showing the receiving member. It is a front view which shows the damping structure which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the receiving member of the damping structure which concerns on 2nd Embodiment. It is a front view which shows the damping structure which concerns on the 3rd Embodiment of this invention.

[First Embodiment]
Hereinafter, the vibration damping structure 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the vibration damping structure 10 according to the present embodiment is applied to, for example, a beam structure 14 of a structure 12 such as a building.

As shown in FIG. 1, a structure 12 is a steel-framed building that is supported by a reinforced concrete foundation 16 as a lower structure and has a pillar-beam frame structure 14 composed of a plurality of pillars 18 and beams 20. It is a thing. An opening 22 surrounded by a pillar 18 and a beam 20 is provided on the upper side of the foundation 16.

A wall body 24 made of a reinforced concrete as a pedestal is erected on the foundation 16 in the opening 22. The lower end portion of the vertical reinforcing bars 24A arranged in the vertical direction of the wall 24 is embedded and fixed in the foundation 16, and the horizontal reinforcing bars 24C are arranged so as to intersect the vertical reinforcing bars 24A. Thereby, the wall body 24 is integrated with the foundation 16. More specifically, the lower end portion of the vertical reinforcing bar 24A is integrated with the foundation 16.
Around the wall 24, gaps S are provided between the left and right columns 18 forming the beam-column structure 14 and between the upper beam 20.

A wall side bracket 26 as a receiving member is provided in the widthwise center of the upper portion of the wall body 24. A frame-side bracket 28 is provided on the column 18 on the left side of the column-beam frame structure 14 in the drawing.

As shown in FIG. 1 and FIG. 2A, a vibration damper 30 is horizontally arranged between the wall-side bracket 26 of the wall body 24 and the frame-side bracket 28 of the beam 20 of the pillar 18. One end of the vibration damping damper 30 is connected to the wall side bracket 26 using a fastening member such as a bolt and a nut, and the other end of the vibration damping damper 30 is connected to the frame side bracket 28 using a fastening member such as a bolt and a nut. ing.

Although the oil damper is used as the vibration damper 30 in the present embodiment, a known damper other than the oil damper may be used, and for example, a friction damper may be used. In short, as will be described later, the structure of the vibration damper 30 does not matter as long as it can expand and contract (deform) during an earthquake to absorb energy and exert a vibration damping effect.

As shown in FIGS. 3A and 3B, the wall-side bracket 26 projects upward from the upper end of the wall body 24, and the projection 26</b>A to which the vibration damping damper 30 is attached and the steel embedded in the wall body 24. And a buried portion 26B made of the same.

The projecting portion 26A is made of horizontally arranged H steel, a damper mounting member 32 made of a steel plate is joined to one end by welding or the like, and a reinforcing plate 33 made of a steel plate is welded to the other end. Are joined together. The damper mounting member 32 is formed with a bolt hole 34 used when mounting the vibration damping damper 30.

A reinforcing rib 36 made of a steel plate arranged horizontally is joined to the web 26Aa of the protruding portion 26A by welding or the like, and one end of the reinforcing rib 36 is joined to the damper mounting member 32 by welding or the like.

The embedded portion 26B is provided along the longitudinal direction of the protruding portion 26A, and includes a vertical wall portion 38 made of a steel plate that extends downward from the widthwise center of the lower flange 26Ab of the protruding portion 26A. The upper end of the vertical wall portion 38 is joined to the lower surface of the lower flange 26Ab of the protrusion 26A by welding or the like.

To both ends of the vertical wall portion 38, end flanges 40 made of steel plates arranged at right angles to the vertical wall portion 38 are joined by welding or the like. Further, a plurality of ribs 42 made of steel plates arranged at right angles to the vertical wall portion 38 are joined to both side surfaces of the vertical wall portion 38 by welding or the like. The upper ends of the end flange 40 and the rib 42 are joined to the lower flange 26Ab of the protrusion 26A by welding or the like.

As shown in FIGS. 1 and 2B and 2C, diagonal members 44L and 44R are embedded in the wall 24. For the diagonal members 44L and 44R, it is desirable to use a reinforcing bar having a higher tensile strength than the reinforcing bar 24A of the wall 24.

As shown in FIG. 1, the diagonal member 44</b>L arranged on the left side of the wall-side bracket 26 is parallel to the side portion of the embedded portion 26</b>B of the wall-side bracket 26 and when the wall 24 is viewed from the front, 26B and a horizontal portion 44Lh linearly extending in the width direction of the wall 24, and a horizontal portion 44Lh that is inclined from one end on the left side of the drawing to the lower left of the drawing and linearly extends toward the foundation 16. It is configured to include an extending diagonal member 44Ls. A hook portion 43 is formed on the lower end side of the diagonal member portion 44Ls, and the hook portion 43 is embedded inside the foundation 16 and fixed to the concrete of the foundation 16. The diagonal member 44Ls may be joined to the reinforcing bar (not shown) embedded in the foundation 16 by welding or the like.

On the other hand, the diagonal member 44R arranged on the right side of the wall-side bracket 26 is in parallel with the side portion of the embedded portion 26B of the wall-side bracket 26 and at a position overlapping the embedded portion 26B when the wall 24 is viewed from the front. The horizontal portion 44Rh that is arranged and extends linearly in the width direction of the wall body 24, and the diagonal member 44Rs that linearly extends toward the foundation 16 from one end of the horizontal portion 44Rh on the right side of the drawing toward the lower right of the drawing. It is configured to include and. A hook portion 43 is formed on the lower end side of the diagonal member portion 44Rs, and the hook portion 43 is embedded inside the foundation 16 and fixed to the concrete of the foundation 16. The diagonal members 44Rs may be joined to the reinforcing bars (not shown) embedded in the foundation 16 by welding or the like.
The diagonal members 44L and 44R are arranged substantially symmetrically when the wall body 24 is viewed from the front. In this way, the wall-side bracket 26 is provided above the diagonal members 44L and 44R and is arranged in the central portion (substantially symmetrical) between the diagonal members 44L and 44R. Further, since the wall-side bracket 26 is arranged in the central portion, the reaction force of the vibration damping damper can be transmitted to the lower structure in good balance.

As shown in FIGS. 2B and 2C, in the present embodiment, the horizontal portion 44Lh of the diagonal member 44L and the embedded portion 26B of the wall side bracket 26 are separated from each other, but the horizontal portion 44Lh of the diagonal member 44L is separated. The embedded portion 26B of the wall-side bracket 26 and the embedded portion 26B of the wall-side bracket 26 are fixed (stress transmitted) to each other via the concrete forming the wall 24. Similarly, in the diagonal member 44R, the horizontal portion 44Rh and the embedded portion 26B of the wall-side bracket 26 are separated from each other, but they are fixed to each other by the concrete that constitutes the wall body 24.

The horizontal portion 44Lh of the diagonal member 44L and the embedded portion 26B of the wall-side bracket 26 may be joined by welding or the like. Similarly, the horizontal portion 44Rh of the diagonal member 44R and the embedded portion 26B of the wall-side bracket 26 are welded. You may join by etc.

A stopper 48 for limiting relative displacement between the wall body 24 and the pillar 18 is attached to the side surface of the pillar 18 at a position facing the side surface near the upper end of the wall body 24. A rubber plate 48A for shock absorption is fixed to the tip of the stopper 48.

(Action, effect)
Next, the operation and effect of this embodiment will be described.
When the beam-frame structure 14 of the structure 12 is deformed in the horizontal direction (direction of arrow L and arrow R in FIG. 1) due to an earthquake or the like, the wall-side bracket 26 provided on the wall body 24 and the frame provided on the column 18 are provided. The vibration damper 30 connected to the side bracket 28 expands and contracts to absorb energy, and vibrates the structure 12.

Here, since the vibration damping damper 30 is connected to the wall side bracket 26 provided on the upper portion of the wall body 24, the reaction force of the vibration damping damper 30 passes through the wall side bracket 26 and the wall body 24. It is transmitted to the foundation 16.

For example, when the column-beam frame structure 14 is displaced with respect to the wall body 24 in the arrow L direction, tension acts on the vibration damper 30, and the wall-side bracket 26 is pulled by the vibration damper 30 in the arrow L direction. The body 24 tends to shear and deform so that the upper end side is displaced in the arrow L direction with respect to the foundation 16. However, the shear deformation is suppressed by the reinforced concrete wall 24 having high rigidity. Further, the diagonal member 44R, which is arranged inside the wall body 24 in a slanted manner and has one end joined to the wall side bracket 26 and the other end joined to the foundation 16, is under tension (bears tension), and the wall side bracket 26 The input shear force is directly transmitted to the foundation 16.

On the other hand, when the column beam structure 14 is displaced in the arrow R direction with respect to the wall 24, a compressive force acts on the vibration damper 30, and the wall bracket 26 is pulled by the vibration damper 30 in the arrow R direction. The wall body 24 tends to shear and deform so that the upper end side is displaced in the arrow R direction with respect to the foundation 16. However, the shear deformation is suppressed by the reinforced concrete wall 24 having high rigidity. Further, the diagonal member 44L, which is arranged inside the wall body 24 in an inclined manner and has one end joined to the wall side bracket 26 and the other end joined to the foundation 16, is strained, and the shearing force input from the wall side bracket 26 is applied. Are transmitted directly to the foundation 16.

In this way, the shear deformation of the wall body 24 due to the reaction force of the vibration damper 30 is suppressed, so that the expansion/contraction amount (deformation amount) of the vibration damper 30 due to the deformation of the wall body 24 is suppressed, and the vibration is suppressed. The vibration effect is improved. Further, the reaction force of the vibration damper 30 is efficiently transmitted to the lower structure by the diagonal members 44L or 44R.
In other words, when a compressive force or a tension is applied from the column-beam frame structure 14 to the vibration-damping damper 30 that is interposed between the wall body 24 and the beam frame frame structure 14 that have rigidity and whose shear deformation is suppressed, the vibration-damping is suppressed. By sufficiently deforming (expanding and contracting) the damper 30 in the axial direction, it is possible to sufficiently exert the vibration damping effect.

Since the ribs 42 and the end flanges 40 that are perpendicular to the shear deformation direction (arrows L and R directions) of the wall body 24 are joined to the embedded portion 26B of the wall side bracket 26, the wall side bracket 26 can be applied to the concrete of the wall body 24. On the other hand, the wall side bracket 26 is firmly fixed, and the end flange 40 and the rib 42 transmit the reaction force of the vibration damping damper 30 to the wall body 24 by bearing pressure.

Here, when the wall body 24 and the post beam frame structure 14 are excessively displaced relative to each other, the stopper 48 abuts the wall body 24 to suppress the excessive relative displacement between the wall body 24 and the beam beam frame structure 14. You can Further, it is possible to limit excessive displacement input to the vibration damper 30 and suppress damage to the vibration damper 30.
The stopper 48 may be provided on the side portion of the wall body 24 on the column side.

[Second Embodiment]
Hereinafter, the vibration damping structure 10 according to the second embodiment of the present invention will be described with reference to FIGS. 4 and 5. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
In the vibration damping structure 10 of the present embodiment, the lower portion of the wall-side bracket 50 shown in FIG. 5 and the diagonal member 52 are provided inside the wall body 24 as shown in FIG.
The wall-side bracket 50 of the present embodiment integrally includes a rectangular portion 54 and a pair of leg portions 56 that extend obliquely downward and are inclined so as to separate from each other from below both side portions in the width direction of the rectangular portion 54. It has a main body 58. Outer flanges 60 arranged at right angles to the main body 58 are joined to the outer edges on both sides of the main body 58 by welding or the like.
An inner flange 62 arranged at a right angle to the main body 58 is joined to the inner edge of the main body 58 by welding or the like.
Further, a reinforcing rib 59 made of a steel plate arranged horizontally is joined to the side surface of the main body portion 58 by welding or the like, and one end of the reinforcing rib 59 is welded to an outer flange 60 to which the vibration damping damper 30 is attached. Are joined together.

One end portion of the diagonal member 52L made of channel steel is arranged in a portion surrounded by the leg portion 56, the outer flange 60, and the inner flange 62 on the left side of the drawing, and a bolt and a nut (not shown) as fastening members are provided. The wall-side bracket 50 and the diagonal member 52L are joined together by using this. Further, one end portion of the diagonal member 52R made of channel steel is arranged in a portion surrounded by the leg portion 56, the outer flange 60, and the inner flange 62 on the right side of the drawing, and bolts and nuts (not shown) as fastening members are provided. ) Is used to join the wall-side bracket 50 and the diagonal member 52R.
The wall-side bracket 50 has a hole 64 for inserting a bolt, and the diagonal member 52 has a hole 66 for inserting a bolt.

The diagonal member 52L on the left side of the drawing is inclined to the lower left side of the drawing toward the foundation 16, and the lower end side of the diagonal member 52L is partially embedded in the inside of the foundation 16 and joined to the concrete of the foundation 16. There is. A fixing member 68 is joined to the lower end of the diagonal member 52L by welding or the like. In addition, the diagonal member 52R on the right side of the drawing is inclined to the lower right of the drawing toward the foundation 16, and the lower end side of the diagonal member 52R is partially embedded inside the foundation 16 and joined to the concrete of the foundation 16. Has been done. A fixing member 68 is joined to the lower end of the diagonal member 52R by welding or the like.
(Action, effect)
In this embodiment, when the beam structure 14 is displaced in the direction of the arrow L with respect to the wall 24, the beam structure 14 is arranged inside the wall 24 with an inclination, one end is joined to the wall-side bracket 50, and the other end is the base. Since the diagonal member 52R joined to the 16 is tensioned, the displacement of the wall-side bracket 50 in the arrow L direction, that is, the shear deformation of the wall body 24 is suppressed.

On the other hand, when the beam structure 14 is displaced in the direction of the arrow R with respect to the wall body 24, it is disposed inside the wall body 24 with an inclination, one end is joined to the wall side bracket 50, and the other end is joined to the foundation 16. The slanted member 52L thus tensioned, and the shearing force input from the wall-side bracket 50 is directly transmitted to the foundation 16.

In the present embodiment, since the diagonal member 52L and the diagonal member 52R made of channel steel (steel frame) having higher tensile strength and rigidity than the diagonal members 44L and 44R of the first embodiment are used, the first exemplary embodiment is used. Therefore, the rigidity of the wall 24 can be increased and the shear deformation suppressing effect can be improved. Therefore, the reaction force of the vibration damper 30 can be more effectively transmitted to the foundation 16.

[Third Embodiment]
Hereinafter, the vibration damping structure 10 according to the third embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
As shown in FIG. 6, in the vibration damping structure 10 of the present embodiment, the vibration damping damper 30 is connected to the lower surface of the beam 20 via the frame side bracket 70.
In the vibration damping structure 10 of the present embodiment, the structure 12 is damped by suppressing the relative displacement between the beam 20 and the wall 24 by the vibration damper 30.

[Other Embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it is needless to say that the present invention can be variously modified and implemented without departing from the spirit of the invention. Is.

It is preferable that the other end of the vibration damper is connected to a portion of the column-beam structure that has a large relative displacement with the lower structure, such as an upper end side of the column-beam structure, during an earthquake or the like.

Although the wall 24 is fixed to the foundation 16 in the above embodiment, the wall 24 may be fixed to the floor beam of the upper floor.

10 Vibration control structure 14 Column-beam structure 16 Foundation (lower structure)
18 columns 20 beams 24 walls (base)
26 Wall side bracket (receiving member)
30 Damping damper 44L Tension material 44R Tension material 44Ls First diagonal member portion 44Rs Second diagonal material portion 50 Wall side bracket (receiving member)
52L Tension material (first diagonal material part)
52R Tension material (second diagonal material part)
68 Fixing member

Claims (3)

The lower structure,
A column-beam structure erected from the lower structure,
A pedestal that is erected from the lower structure and is separated from the column beam frame,
A receiving member provided on the upper part of the pedestal, the lower side being embedded in the pedestal, and the upper side protruding above the upper surface of the pedestal;
A vibration damper, one end of which is connected to the receiving member and the other end of which is connected to the post beam frame, and which suppresses relative displacement between the receiving member and the post beam frame.
It is embedded in the pedestal, one end is connected to the lower structure, the other end is close to or connected to the receiving member, bears tension, and is accompanied by the relative displacement between the receiving member and the lower structure. A diagonal member that directly transmits the shearing force of the pedestal to the lower structure,
With a vibration damping structure. The direction of the relative displacement is the in-plane direction of the pedestal,
The receiving member is arranged in the center of the pedestal,
The diagonal member embedded in the pedestal includes a first diagonal member portion inclined from the receiving member toward the lower structure, and a first diagonal member portion extending from the receiving member toward the lower structure. The damping structure according to claim 1, further comprising a second diagonal member portion that is inclined in the opposite direction. The damping structure according to claim 1 or 2, wherein a stopper that restricts relative displacement between the pedestal and the post beam frame is provided on the pedestal or the post beam frame.