JP2008089113A - Vibration controlling damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration controlling damper capable of holding the shape of a viscoelastic material by repetitive deformation, and having sufficiently large energy absorbing capacity. <P>SOLUTION: This vibration damping damper is characterized by having a first plate material displaced in the first direction, a second plate material displaced in the second direction in the inverse direction of the first direction, a casing having an opening in both end parts, projecting a part of the first plate material from one opening and covering the first plate material and the second plate material in a state of projecting a part of the second plate material from the other opening, and the viscoelastic material filled in a space part except for the first plate material and the second plate material in this casing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vibration damper that is stretched between building structures.

Conventionally, damping dampers such as shear type dampers using viscoelastic materials have been used between building structures where displacement is concentrated due to vibration caused by earthquakes and winds, in order to reduce vibration between these building structures. Has been. The basic structure of the shear type damping damper can be divided into (a) a parallel plate type and (b) a cylindrical type.
The parallel plate type (a) has a simple structure, but since large energy absorption cannot be obtained, a two-sided shear type and a multi-sided shear type have been proposed. However, since the two-sided shearing type and the multi-sided shearing type have both open side surfaces, it is difficult to maintain the shape of the viscoelastic material by repeated deformation. Therefore, a cylindrical type may be used. However, the cylindrical type has to tend to be complicated in structure because the part to be attached to the structure must be attached to the inner cylinder and the outer cylinder.

The following Patent Document 1 shows a damping damper having a parallel plate type (a) and having a plate covered with an outer casing. However, this damping damper still has a problem that it cannot absorb a sufficiently large amount of energy.
Japanese Patent Laid-Open No. 10-299284

  An object of the present invention is to provide a damping damper that can maintain the shape of a viscoelastic material by repeated deformation and that has a sufficiently large energy absorption capability.

The vibration damper according to the present invention includes a first plate member that is displaced in a first direction, a second plate member that is displaced in a second direction opposite to the first direction, and openings at both ends. A casing that covers the first plate member and the second plate member in a state where a part of the first plate member protrudes from one opening and a part of the second plate member protrudes from the other opening. And a viscoelastic material filled in a space portion excluding the first plate member and the second plate member in the casing.
According to the configuration of the present invention, since the viscoelastic material is covered with the casing, the shape of the viscoelastic material can be maintained by repeated deformation, and there are three shear planes, so that the energy is sufficiently large. Absorption can be obtained.

A third plate member that is displaced in parallel with the first plate member is further provided in the casing, and the first plate member and the third plate member sandwich the second plate member through a viscoelastic material. A fourth plate member disposed in parallel to the second plate member and disposed in the casing, wherein the second plate member and the fourth plate member are disposed on the third plate via a viscoelastic material. It arrange | positions so that a board | plate material may be pinched | interposed, the said 1st board | plate material and the said 3rd board | plate material may be connected in the outer side of one side of the said casing, and the said 2nd board | plate material and the said 4th board | plate material may be connected to the other side of the said casing. It is preferable to connect on the outside.
According to this configuration, it is possible to provide a vibration damper having a larger energy absorption without generating a moment.

It is preferable that a mounting hole is provided in the protruding portion of the end portion of the first plate member and the protruding portion of the end portion of the second plate member on the outside of the casing.
According to this configuration, it is possible to provide a damper for vibration control that is easier to attach to a member that connects the building structure and the damper.

  ADVANTAGE OF THE INVENTION According to this invention, the damper for damping which can hold | maintain the shape of the viscoelastic material by repeated deformation | transformation and has a sufficiently large energy absorption capability can be provided.

The vibration damper according to the present invention includes a first plate member that is displaced in a first direction, a second plate member that is displaced in a second direction opposite to the first direction, and openings at both ends. A casing that covers the first plate member and the second plate member in a state where a part of the first plate member protrudes from one opening and a part of the second plate member protrudes from the other opening. And a viscoelastic material filled in a space portion excluding the first plate member and the second plate member in the casing.
Hereinafter, the vibration damper according to the present invention will be described in detail.

  FIG. 1 is a perspective view showing an embodiment of a damping damper to which the present invention is applied, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. A damping damper 10 shown in FIGS. 1 and 2 includes a casing 12, two plate members (first plate member 14 and second plate member 16) located in the casing 12, and two sheets in the casing 12. And a viscoelastic material 18 filled in the space excluding the plate material.

The casing 12 has openings at both ends, and a part of the first plate member 14 protrudes from one opening, and a part of the second plate member 16 protrudes from the other opening. The protrusions of the first plate member 14 and the second plate member 16 are used for mounting on a building structure. That is, the damping damper 10 can be attached and stretched to the building structure via the protruding portions of the first plate member 14 and the second plate member 16. Therefore, it is preferable to provide a hole for attachment to a building structure in the protruding portion. For example, in order to fix the protrusion and the building structure with a bolt or the like, a hole 20 through which the bolt or the like passes is provided (see FIG. 1). In addition, the 1st board | plate material 14 and the 2nd board | plate material 16 are the same members.
Examples of the material for forming the casing 12 include metals, ceramics, and resins. From the viewpoint of imparting fire resistance, it is preferable to use metal or ceramic.

The viscoelastic material 18 filled in the casing 12 is a material that undergoes shear deformation due to shear stress, and is filled in the space except for the first plate member 14 and the second plate member 16 in the casing 12. The first plate member 14, the second plate member 16, and the inner wall of the casing 12 are bonded to each other. In this configuration, when the first plate member 14 and the second plate member 16 are subjected to tensile or compressive stress, the viscoelastic material 18 is sheared by the shear stress and contributes to energy absorption.
Specific examples of such viscoelastic materials include high damping rubber, acrylic polymer, rubber asphalt, silicone rubber, styrene polymer, etc., and are materials having a characteristic that the stress-strain relationship is elliptical or substantially elliptical. If there is, it is preferable.

  When the damping damper 10 is stretched over the building structure and receives tensile or compressive stress due to vibration such as an earthquake, the first plate member 14 and the second plate member are displaced in opposite directions. In other words, the protruding portions of the plate members are displaced in the direction toward the outside with respect to the tensile stress, and are displaced in the opposite direction with respect to compression. At this time, as described above, since the viscoelastic material 18 is bonded to each interface of the casing 12, the first plate member 14, and the second plate member 16 in the casing 12, (1) the upper inner wall of the casing 12. And the first plate member 14, (2) between the first plate member 14 and the second plate member 16, and (3) between the second plate member 16 and the lower inner wall of the casing 12. This means that there are three shear surfaces (1) to (3), and therefore, a conventional damper for vibration damping that is not covered by a casing (for example, two plates and one shear surface). Compared with, a large energy absorption is obtained.

  FIG. 3 is a diagram illustrating a state in which the first plate member 14 and the second plate member 16 of the vibration damping damper 10 illustrated in FIG. 2 are subjected to tensile stress and the protruding portions are displaced outward. When the first plate member 14 and the second plate member 16 are subjected to tensile stress, the casing 12 is subjected to stress along with the shear deformation of the viscoelastic material 18, but the first plate member 14 and the second plate member 16 are in opposite directions. The casing 12 itself is not displaced because it is in a balanced state on the left and right. Therefore, it is not necessary to hold the casing 12, and only the first plate and the second plate need be attached to the building structure as described above.

  In the vibration damper according to the present invention, the viscoelastic material is covered with the casing, and the shape of the viscoelastic material follows the shape of the internal space of the casing. Therefore, as long as the casing is a rigid body, it can be easily deformed repeatedly. The shape can be maintained.

  As described above, there are three shear surfaces of the vibration damper of the present invention. In order to make the shear strain on each surface the same, (1) the upper inner wall of the casing 12 and the first plate member 14 are provided. (2) The ratio of the thickness of the viscoelastic material 18 between the first plate member 14 and the second plate member 16 and (3) the second plate member 16 and the lower inner wall of the casing 12 is 1. : Preferably about 2: 1. The thickness of each viscoelastic material 18 is preferably about 2 to 10 times that of each plate.

  In the vibration damper 10 shown in FIGS. 1 to 3, the casing 12 has a cylindrical shape with a substantially rectangular cross section. However, the present invention is not limited thereto, and a cylindrical casing is used. Also good. Further, the first plate member 14 and the second plate member 16 are not limited to a flat plate shape, and may be a cylindrical shape. FIG. 4 is a view of each form from one end, (A) is a form using a cylindrical casing, and (B) is a form using a cylindrical plate and a cylindrical plate. It is. In each of FIGS. 4A and 4B, the casing and each plate are only different in shape, and the other configurations are substantially the same as the configurations shown in FIGS. A description thereof will be omitted.

  Although the above damping damper is a form using two sheets, the present invention is not limited to this, and a form using four sheets may be used. That is, a third plate member that is displaced in parallel with the first plate member is further provided in the casing, and the first plate member and the third plate member are disposed so as to sandwich the second plate member with the viscoelastic material interposed therebetween. A fourth plate member that is displaced in parallel with the second plate member in the casing, and the second plate member and the fourth plate member are disposed so as to sandwich the third plate member with the viscoelastic material interposed therebetween; The form formed by connecting one plate member and the third plate member on one outer side of the casing and connecting the second plate member and the fourth plate member on the other outer side of the casing may be employed.

FIG. 5 and FIG. 6 show forms using four plate materials. FIG. 5 is a view corresponding to FIG. 2 showing a vibration damper having four plate members. A vibration damper 30 shown in FIG. 5 includes a first plate member 34, a second plate member 36, a third plate member 38, and a fourth plate member 40 in a casing 32. The viscoelastic material 42 (hatched area in FIG. 5) is filled in the space portion excluding the plate materials. The casing 32 and the viscoelastic material 42 have substantially the same configuration as the casing 12 and the viscoelastic material 18 of FIGS. As shown in FIG. 5, a part of the first plate member 34 and the third plate member 38 protrudes from an opening at one end of the casing 32, and is connected by a connecting member 44 at the protruding portion. And the 3rd board | plate material 38 is displaced in parallel, respectively.
Similarly, a part of the second plate member 36 and the fourth plate member 40 protrude from the opening on the opposite side of the opening from which the first plate member 34 and the third plate member 38 of the casing 32 protrude, and the protrusion The second plate member 36 and the fourth plate member 40 are displaced in parallel, respectively.

In the configuration of FIG. 5 described above, the connecting portion of the first plate member 34 and the third plate member 38 and the connecting portion of the second plate member 36 and the fourth plate member 40 are attached to the building structure. When the first plate member 34 and the third plate member 38, and the second plate member 36 and the fourth plate member 40 are subjected to tensile stress in such a mounted state, as shown in FIG. Between the first plate member 34, between the first plate member 34 and the second plate member 36, between the second plate member 36 and the third plate member 38, and between the third plate member 38 and the fourth plate member 38. 40, the viscoelastic material 42 located between the fourth plate member 40 and the inner wall of the casing 32 undergoes shear deformation. That is, since there are five shear planes, energy absorption greater than that of the vibration damper shown in FIGS.
In the configuration of FIG. 5 described above, when the viscoelastic material is sheared and deformed, the moment of force is in a balanced state, and no extra force is generated such as rotation of the damping damper. Is obtained.

It is a perspective view which shows one Embodiment of the damper for damping | damping to which this invention is applied. It is sectional drawing along the AA line of the damping damper shown in FIG. FIG. 3 is a cross-sectional view showing a state where the damping damper shown in FIG. 2 is subjected to tensile stress and the viscoelastic material is shear-deformed. It is a figure which shows the modification of the damper for damping | damping to which this invention is applied. It is a figure corresponding to FIG. 2 which shows another form of the damper for damping | damping to which this invention is applied. FIG. 6 is a cross-sectional view showing a state where the damping damper shown in FIG. 5 is subjected to tensile stress and the viscoelastic material is shear-deformed.

Explanation of symbols

10 damping damper 12 casing 14 first plate material 16 second plate material 20 hole

Claims (3)

A first plate that is displaced in a first direction;
A second plate member that is displaced in a second direction opposite to the first direction;
Openings at both ends, a part of the first plate member projecting from one opening, and a part of the second plate member projecting from the other opening, the first plate member and the second plate member A casing covering the plate material,
A viscoelastic material filled in a space excluding the first plate and the second plate in the casing;
A damper for vibration control characterized by comprising: A third plate member that is displaced in parallel with the first plate member is further provided in the casing, and the first plate member and the third plate member sandwich the second plate member via a viscoelastic material. Place and
A fourth plate member that is displaced in parallel with the second plate member is further provided in the casing, and the second plate member and the fourth plate member sandwich the third plate member via a viscoelastic material. Place and
Connecting the first plate member and the third plate member on one outer side of the casing;
The vibration damper according to claim 1, wherein the second plate member and the fourth plate member are connected to each other outside the casing.   3. The control according to claim 1, wherein a mounting hole is provided in the protruding portion of the end portion of the first plate member and the protruding portion of the end portion of the second plate member on the outside of the casing. Choreograph damper.

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