JP5968063B2 - Vibration control device - Google Patents

Description

  The present invention relates to a vibration control device provided in a frame for attenuating vibration in buildings such as lightweight steel structures.

  As a seismic control device provided in a frame of a building, for example, as disclosed in Patent Document 1, one of a pair of upper and lower mounting members attached to a horizontal member such as a beam has a first parallel to the frame surface. A plate is attached to the other of the attachment members by a second plate parallel to the first plate at a predetermined distance from the first plate, and viscoelasticity is provided between the first plate and the second plate. Known to be bonded to the body. That is, at the time of vibration due to an earthquake or the like, the first plate and the second plate are displaced in the opposite directions, and the viscoelastic body is sheared to attenuate the vibration energy.

JP 2005-133533 A

  However, in a conventional vibration control device in which a viscoelastic body is interposed between a pair of plates, there is a possibility that the distance between the pair of plates may be widened and buckled out of plane when shearing. In this case, the input to the viscoelastic body is insufficient and the damping performance is lowered.

  Accordingly, an object of the present invention is to provide a vibration control device that can prevent buckling of a plate and reliably input vibration to a viscoelastic body to obtain a suitable damping performance.

In order to achieve the above-mentioned object, the invention described in claim 1 is characterized in that a first plate fixed to one side of the horizontal member forming the frame in the frame and parallel to the frame surface, and the first plate A second plate that is arranged in parallel with the first plate at a predetermined interval in the thickness direction and is fixed to the other horizontal member, and interposed between the first plate and the second plate And a viscoelastic body to which the opposing surfaces are bonded to each other, wherein the fixed end side fixed to the horizontal member in each plate has a vertical length Is formed shorter than the plate, and the end portion is located outside the fixed end portion of the mating plate on the opposite side to the fixed end portion in the thickness direction, and buckling restricts the movement of the plate in the thickness direction outside. It is characterized in that the preventer is provided respectively It is intended.
According to a second aspect of the present invention, in the configuration of the first aspect, a sliding plate that is in contact with the other opposing surface is attached to one of the opposing surfaces of the buckling prevention body and the mating plate. It is characterized by.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the gap between the buckling prevention body and the plate is widened between the buckling prevention body and the plate on which the buckling prevention body is provided. It is characterized in that a regulating means for regulating is provided.

According to the first aspect of the present invention, by adopting the buckling prevention body, it is possible to prevent the buckling of the plate and reliably input vibration to the viscoelastic body, thereby obtaining a suitable damping performance.
According to the second aspect of the present invention, in addition to the effect of the first aspect, since the sliding plate always abuts on the plate, an improvement in the effect of preventing the buckling of the plate can be expected.
According to invention of Claim 3, in addition to the effect of Claim 1 or 2, the appropriate position of the buckling prevention body with respect to a plate is maintained, and the reliability of buckling prevention increases.

It is explanatory drawing of the damping device of form 1, (A) shows a front surface and (B) shows a side surface, respectively. It is a front view of the flame | frame which assembled | attached the damping device of form 1. It is explanatory drawing of the damping device of form 2, (A) shows a front, (B) shows a side surface, respectively. It is explanatory drawing of the damping device of form 3, (A) shows a front, (B) shows a side, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Form 1]
FIG. 1 is an explanatory diagram illustrating an example of a vibration control device. The vibration control device 1 includes a pair of plates 2 and 2 (first and second plates), a viscoelastic body 3 interposed between the plates 2 and 2, and buckling prevention connected to each plate 2. It comprises a buckling prevention plate 4 as a body.
First, the plate 2 has a rectangular shape in front view, a base end portion 5 in the vertical direction, an inclined portion 6 that bends and inclines from the base end portion 5, and a base end that is bent from the inclined portion 6. A distal end portion 7 extending in parallel with the portion 5, with one plate 2 having the proximal end portion 5 on the upper side and the other plate 2 having the proximal end portion 5 on the lower side, and the distal end portions 7 and 7 in the thickness direction. It arrange | positions so that it may superpose at predetermined intervals mutually. The viscoelastic body 3 is interposed between the tip portions 7 and 7 in a state where the opposing surfaces of the tip portion 7 are bonded to each other.

  The buckling prevention plate 4 is rectangular when viewed from the front, and the length in the vertical direction is shorter than that of the plate 2. The buckling prevention plate 4 includes a mounting portion 8 parallel to the base end portion 5 of the plate 2, an intermediate portion 9 bent from the mounting portion 8 and inclined symmetrically with the inclined portion 6 of the plate 2, It comprises a restraining portion 10 that is bent from the portion 9 and extends in parallel with the mounting portion 8. The mounting portion 8 has a base end formed by three high-strength bolts 11, 11... Aligned in the left-right direction with a mounting bracket 12 having a T-shaped cross section sandwiched between the base end portion 5 of the plate 2 It can be connected to the part 5. Therefore, the attachment portion 8 is connected in parallel with the base end portion 5 in a state of being separated from the base end portion 5 by the thickness of the attachment fitting 12. In this state, the restraining portion 10 of each buckling prevention plate 4 comes close to the tip portion 7 of the opposite plate 2 from the outside and overlaps in the thickness direction.

  The vibration control device 1 configured as described above is installed in a frame 20 shown in FIG. The frame 20 is formed of a pair of upper and lower horizontal members 21 and 21 and vertical column members 22 and 22 connecting the ends of the horizontal members 21 and 21. The vibration control device 1 includes a pair of inclined members 23, 23 installed between the upper and lower mounting brackets 12, 12 and the left and right joints of the horizontal member 21 and the column member 22. Is supported in parallel with the frame surface. Reference numeral 24 denotes a reinforcing material installed horizontally between the inclined members 23 and 23.

Therefore, in this vibration control device 1, when the frame 20 is displaced in the horizontal direction by being vibrated by an earthquake or the like, the upper and lower horizontal members 21, 21 are displaced in the opposite direction horizontally, and the inclined members 23, 23 and the attachments are attached. Similarly, the upper and lower plates 2, 2 integrated with the horizontal members 21, 21 via the metal fitting 12 are also horizontally displaced in the opposite direction. As a result, the viscoelastic body 3 undergoes shear deformation to cause a damping action.
At this time, the buckling prevention plate 4 is displaced integrally with the plate 2 on the side to which the buckling prevention plate 4 is connected, and is relatively displaced in the horizontal direction with respect to the opposite plate 2 in a state of being close to the outside. Therefore, even if the opposite plate 2 tries to buckle out of the plane, the buckling is restricted by the restraining portion 10 of the buckling prevention plate 4.

  Thus, according to the vibration damping device 1 of the first aspect, the end portion is located on the outer side in the thickness direction of the counterpart plate 2 on the end portion side fixed to the horizontal member 21 in each plate 2. Providing the buckling prevention plate 4 for restricting the movement of the plate 2 in the thickness direction outwardly, preventing the buckling of the plates 2 and 2 and allowing the viscoelastic body 3 to reliably input vibrations. Attenuation performance can be obtained.

Next, another embodiment of the present invention will be described. However, the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted.
[Form 2]
3 is different from Embodiment 1 in that a sliding plate 13 is provided between the restraining portion 10 of the buckling prevention plate 4 and the tip portion 7 of the plate 2. The sliding plate 13 is made of synthetic resin, and the opposing surfaces of the restraining portion 10 are bonded to each other so that the sliding plate 13 can slide with respect to the distal end portion 7.
Therefore, when the frame 20 is displaced in the horizontal direction and the plate 2 and the buckling prevention plate 4 are displaced in the opposite direction, the sliding plate 13 on the restraining portion 10 side always slides with respect to the tip portion 7. The buckling of the plate 2 is prevented.

Thus, also in the vibration damping device 1A of the above-described form 2, it is possible to prevent the buckling of the plate 2 and to input vibrations to the viscoelastic body 3 with certainty, thereby obtaining suitable damping performance. In particular, here, since the sliding plate 13 that is in contact with the other opposing surface is attached to the surface of the buckling prevention plate 4 that faces the mating plate 2, the sliding plate 13 always contacts the plate 2. 2 can be expected to improve the buckling prevention effect.
In the second aspect, the sliding plate is bonded to the restraining portion, but may be bonded to the tip portion. Further, the sliding plate is not limited to a synthetic resin, and can be formed of an elastic body or a metal.

[Form 3]
In the vibration control device 1B shown in FIG. 4, the bolt 14 is passed through from the outside of the restraining portion 10 of the buckling prevention plate 4 at a position avoiding the viscoelastic body 3, and the tip portion 7 of the plate 2 is also passed through as it is. Thus, the second embodiment is different from the first and second embodiments in that the nut 15 is tightened outside the distal end portion 7. The bolts 14 and the nuts 15 are arranged in pairs on the upper and lower buckling prevention plates 4, and the bolts 14 and the nuts 15 are restricting means for restricting an increase in the distance between the restraining part 10 and the tip part 7. It becomes.
Therefore, when the frame 20 is displaced in the horizontal direction and the plate 2 and the buckling prevention plate 4 are displaced in the opposite direction, the restraining portion 10 whose distance from the plate 2 is fixed by the bolt 14 and the nut 15 is the plate. 2 buckling is prevented.

  As described above, also in the vibration damping device 1B according to the third aspect, it is possible to prevent buckling of the plate 2 and reliably input vibration to the viscoelastic body 3 to obtain suitable damping performance. In particular, here, a regulating means (a bolt 14 and a nut for regulating the expansion of the gap between the buckling prevention plate 4 and the plate 2 between the buckling prevention plate 4 and the plate 2 on which the buckling prevention plate 4 is provided. By providing 15), the proper position of the buckling prevention plate 4 with respect to the plate 2 is maintained, and the reliability of buckling prevention is enhanced.

  The restricting means is not limited to bolts and nuts, and an L-shaped locking plate that is fixed to one side edge of the plate or the buckling prevention plate and whose tip is locked to the other side edge is employed. The design can be changed as appropriate.

In common with each embodiment, the buckling prevention plate does not need to have the same width as the plate, and may be narrower or wider than the plate as long as buckling can be prevented. Moreover, it can also divide | segment into not only one but multiple. The amount of overlap with the plate can also be changed as appropriate.
Further, in the above embodiment, the buckling prevention plate is connected to the plate with a high-strength bolt, but may be directly connected to the plate by welding or the like.

  1, 1A, 1B ... Damping device, 2. Plate, 3. Viscoelastic body, 4. Buckling prevention plate, 5. Base end part, 6 .... Inclined part, 7 .... Tip part, 8 .... Mounting part, 9 .... Intermediate part, 10 .... Restraining part, 12 .... Mounting bracket, 13 .... Sliding plate, 14 .... Bolt, 15 .... Nut, 20 .... Frame, 21 ... Material, 22 ... pillar material, 23 ... inclined material.

Claims (3)

A first plate that is fixed to one horizontal member forming the frame in the frame and parallel to the frame surface; and the first plate at a predetermined interval in the thickness direction from the first plate; A second plate that is arranged in parallel and fixed to the other horizontal member side, and an adhesive that is interposed between the first plate and the second plate so that the opposing surfaces are bonded to each other. A vibration control device comprising an elastic body,
On the fixed end side fixed to the horizontal member in each plate , the length in the vertical direction is formed shorter than that of the plate, and the end portion is on the opposite side of the fixed end portion of the counterpart plate . A vibration control device, characterized in that a buckling prevention body is provided, which is located outside the free end portion in the thickness direction and restricts the movement of the plate in the thickness direction outside.   The vibration control device according to claim 1, wherein a sliding plate that is in contact with the other facing surface is attached to any one of the facing surfaces of the buckling prevention body and the counterpart plate.   2. A regulating means is provided between the buckling prevention body and the plate on which the buckling prevention body is provided to regulate an increase in the distance between the buckling prevention body and the plate. Or the vibration control apparatus of 2.

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