JP2007113178A - Vibration control device and vibration control structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control device and a handleable vibration control structure in a small type for enhancing rigidity of a structure by efficiently damping vibration of an earthquake by exhibiting both functions of the aseismatic action and the vibrartion control action. <P>SOLUTION: A pair of steel plates 1 and 2 of the substantially same shape having installation pieces 11 and 21 respectively bent at a right angle to one side, are superposed so that the installation pieces are mutually orthogonal by sandwiching a viscoelastic body 3 in-between, and a support member 31 is installed on an abutting wall 7a arranged at an interval on a surface of one steel plate 1. One end of at least one or more of bar-shaped plate springs 4 is supported by the support member 31 by leaving a gap G movable between the support member and the abutting wall 7a, and is constituted by arranging the other end by leaving the gap G movable between the support member and an abutting wall 23a arranged at an interval on a surface of the other steel plate 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibration damping device and a vibration damping structure used to reduce vibration of a structure such as a building.

  Conventional vibration damping fittings have been proposed as shown in FIG. 19 and FIG. That is, the vibration damping fitting is composed of a pair of flat plate rear plate 151 and front plate 152 having substantially the same shape, and a viscoelastic body 153 sandwiched between the gaps of both plates. And this damping metal fitting is installed between the horizontal members 102 which are arranged in multiple stages between the columns 101 and are opposed to each other, a flat plate 151 is fixed to the upper horizontal member 102a with bolts 154, and the lower horizontal member A flat front plate 152 is fixed to 102b with bolts 154.

  Then, as shown in FIG. 21, when the vibration having the amplitude value V0 is applied to the structure in the horizontal direction, the rear plate 151 and the front plate 152 relatively move along the horizontal direction. Therefore, the vibration energy is consumed through the resistance force accompanying the shear deformation of the viscoelastic body 153 generated at this time, and the vibration is reduced.

  However, the amplitude actuation amount of the rear plate 151 and the front plate 152 is the same value as the amplitude width V0 of the applied vibration, and the resistance force of the viscoelastic body 153 is uniquely determined with respect to this amplitude actuation amount. There is a problem that sufficient resistance cannot be obtained for amplitude widths other than the maximum allowable amplitude value.

  Therefore, two or more damping fittings having the above-described configuration are installed, two or more viscoelastic bodies 153 having different mechanical characteristics are used, and the mounting distance between the rear plate 151 and the front plate 152 of the damping fitting with respect to the lateral member 102 is set to L. In addition, when the distance between the upper and lower horizontal members is h, a conversion coefficient β, which is a ratio between the two, is selected according to the mechanical characteristics of the viscoelastic body 153 (see, for example, Patent Document 1).

  By adopting such a configuration, it is possible to obtain a large resistance against various amplitude widths, and to efficiently reduce the vibration of the structure.

Japanese Patent No. 2610243 (third column, lines 15 to 36 and FIGS. 18 to 20).

  However, the vibration damping structure in which two or more conventional vibration damping fittings are installed increases the size and increases the cost. In addition, there are vibration-proof metal fittings that increase the rigidity of structures, and there are vibration-damping and vibration-isolating methods that attenuate vibrations such as earthquakes, but these two have different purposes and still have vibration-proofing and vibration-damping effects. There is no product that has both. For this reason, especially in the wooden house, the device of mounting | wearing was needed and the handling was not easy.

  The present invention has been made to solve the conventional problems as described above, and uses a small and easy-to-handle vibration damping device to which both functions of vibration resistance and vibration damping are added, and the vibration damping device. The object is to obtain a vibration control structure at a low cost.

  The vibration damping device according to the present invention is sandwiched between a pair of substantially identical flat plates each having a mounting piece bent at a right angle on one side, and the two flat plates that are overlapped so that the mounting pieces are orthogonal to each other. In a vibration damping device comprising a viscoelastic body to be attached and a support member attached between the contact walls provided at an interval on the surface of one flat plate, a gap that is movable between one end and the contact wall is provided. And a spring member that is supported by a support member and is provided with a movable gap between the other end and an abutting wall provided on the surface of the other flat plate with a space therebetween. .

  In the vibration damping device according to the present invention, one end of the spring member is supported by a support member attached between the contact walls provided on the surface of one flat plate with a movable gap between the support member and the other. A movable gap is provided between the contact walls provided on the surface of the other flat plate protruding from the window hole provided on one flat plate.

  In the vibration damping device according to the present invention, a cover that covers the contact wall, the support member, and the spring member is provided on the surface of one flat plate.

  In the vibration damping fitting according to the present invention, a support member for supporting the end of the spring member is provided inside the cover.

  The vibration-damping fitting according to the present invention includes a support plate integrally provided with a plurality of fixing members for fixing a pair of flat plates.

  In the vibration damping device according to the present invention, a viscoelastic body is further disposed between one of the stacked flat plates and the support plate.

  The vibration damping device according to the present invention uses a steel plate as each flat plate and a bar-shaped plate spring as a spring material.

  The vibration damping structure according to the present invention uses the vibration damping device according to any one of claims 1 to 6, and one flat plate of the vibration damping device is attached to a pillar of the structure, and the other flat plate is attached to the structure. It is attached to a beam or foundation.

In the present invention, a pair of substantially identical flat plates each having a mounting piece bent at a right angle on one side are overlapped so that a viscoelastic body is sandwiched therebetween so that the mounting pieces are orthogonal to each other, and a gap is formed on the surface of one flat plate. A support member is attached between the contact walls provided with a gap, and one end of the spring member is supported by the support member with a movable gap between the contact wall and the other end spaced from the surface of the other flat plate. Since a movable gap is provided between the contact wall and the contact wall provided with a gap, the spring member moves in the gap to the contact wall while vibration energy due to earthquakes is small. Since there is no contact, no deformation occurs. However, since the pair of flat plates move relatively, the viscoelastic body that is in surface contact with each flat plate undergoes shear deformation, and the vibration is efficiently absorbed by the resistance force associated with the shear deformation and exhibits damping force. Can do.

On the other hand, when large vibrational energy that cannot be absorbed only by shear deformation of the viscoelastic body is applied, the abutting wall abuts against the end of the spring member due to the large relative movement of both flat plates. Since they are pressed and deformed in opposite directions, large vibration energy can be efficiently absorbed by the elastic restoring force due to the deformation of the spring member, and an appropriate damping force can be exhibited.

  As a result, by combining the resistance force accompanying the shear deformation of the viscoelastic body and the elastic restoring force of the spring member, any vibration energy applied due to an earthquake etc. can be absorbed smoothly and efficiently, and an appropriate damping force can be exhibited. Can do. In addition, the structure is simple, lightweight and downsized, easy to handle, requires no maintenance, and can be used semipermanently.

  In this invention, one end of a rod-shaped spring member is supported by a support member attached between contact walls provided on the surface of one flat plate with a movable gap between the corresponding contact walls, and the other end is supported on one side. Since the movable gap is provided between the contact wall provided on the surface of the other flat plate protruding from the window hole provided in the flat plate, the effect that the spring member can be easily attached is provided. There is also.

  In the present invention, the cover that covers the abutting wall, the supporting member, and the spring member is provided on the surface of one flat plate, so that the abutting wall, the supporting member, and the leaf spring are not exposed to the outside, and the appearance is improved. There is also an effect that it is good.

  Since the present invention is configured by providing a support member for supporting the end of the rod-shaped spring member inside the cover, it is possible to handle the component parts by attaching one end of the rod-shaped spring member to the support member in advance. There is also an effect that it becomes easier.

  Since the present invention comprises a support plate integrally provided with a plurality of fixing members for fixing a pair of flat plates, the number of parts used is small, the whole assembly becomes easy, and a plurality of fixing members are fixed. Since the member is integral with the support plate, there is also an effect that the appearance appearance after assembly is good.

  Since the vibration damping device according to the present invention is configured by arranging a viscoelastic body between one of the stacked flat plates and the support plate, the resistance force due to the shear deformation of the viscoelastic body is different from that of the other viscoelastic body. Acting with the resistance force accompanying the body shear deformation and the elastic restoring force of the spring member, it can absorb vibration energy due to earthquakes, transportation, wind, etc. more efficiently, and can exhibit more appropriate damping force There is also an effect.

  The vibration damping structure according to the present invention uses the vibration damping device according to any one of claims 1 to 6, and one flat plate of the vibration damping device is attached to a pillar of the structure, and the other flat plate is attached to the structure. Since the structure is attached to a beam or a base, it functions as a vibration-proof device, and has the effect of increasing the rigidity of the wooden house as a structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an exploded perspective view of a vibration damping device showing an embodiment of the present invention, FIG. 2 is a plan view of the vibration damping device showing an assembled state before the cover is attached, FIG. 3 is a front view thereof, and FIG. FIG. 5 is a front side perspective view of the assembled state, FIG. 6 is a rear side perspective view of the assembled state, and FIG. 7 is an enlarged cross-sectional view along line AA in FIG. 8 is a plan view showing one steel plate, FIG. 9 is a left side view thereof, FIG. 10 is a plan view showing the other steel plate, FIG. 11 is a left side view thereof, and FIG. 12 is a plan view of a support plate, FIGS. 13 to 15 are a plan view, a front view, and a left side view showing the relationship between the bar-shaped leaf spring and the contact wall, respectively, and FIG. 16 is a plan view of a cover attached to the outer surface of one steel plate.

  In the figure, the steel plates 1 and 2 are formed of a pair of substantially identical flat plates, and the viscoelastic body 3 is disposed between the pair of steel plates 1 and 2 overlapped. As shown in FIG. 8, one steel plate 1 has a substantially quadrangular shape with some corners cut off, and an attachment piece 11 bent at a right angle is formed on one side of the steel plate 1. A hole 12 through which the assembly bolt is passed is formed so as to substantially coincide with each apex of the triangle, and a rectangular window hole 13 is formed in the vicinity of the cut corner. In addition, a contact wall 7a is provided on the outer surface of the flat portion of the steel plate 1 with a space therebetween, and a support member 31 is supported on the contact wall 7a.

  As shown in FIG. 10, the other steel plate 2 has substantially the same shape as the steel plate 1, and an attachment piece 21 that is bent at a right angle is formed on one side of the other steel plate 2 so as to face the hole 12 of the steel plate 1 when overlapped with the steel plate 1. A plurality of abutments that each have a hole 22 of a size that allows the bolt 9 to pass freely through the position where the bolt 9 can freely move, and that disposes the leaf spring 4 at a position that fits into the window hole 13 of the steel plate 1. A wall 23a is provided. The abutting wall 23a can be disposed with a gap G that can move the end of the leaf spring 4 therebetween. In this case, the abutting wall 23a fitted and protruding into the window hole 13 has a dimensional relationship in which it can freely move back and forth and right and left within the window hole 13.

In the illustrated example, as shown in FIGS. 13 to 15, bases 7 and 23 in which concave grooves are arranged are formed on the surfaces of the steel plates 1 and 2, respectively, and both walls of the concave grooves are connected to the contact walls 7 a and 23 a. However, the contact walls 7a and 23a may be formed directly on the surfaces of the steel plates 1 and 2. As a method of this formation, for example, a member different from the steel plates 1 and 2 is provided side by side on the surface of the steel plate with a space therebetween to form the contact walls 7a and 23a. Alternatively, a part of the steel plates 1 and 2 is juxtaposed and cut up, and the cut and raised pieces are used as the contact walls 7a and 23a. Further, the reinforcing members 32 and 33 shown in FIG. 6 are provided at the ends of the attachment pieces 11 and 21 of the steel plates 1 and 2, and the holes 32 a and 33 a provided on the ends are matched with the attachment holes 11 a and 21 a of the attachment pieces 11 and 21. It is reinforced by fixing with a rivet or the like (not shown) passed through this hole. In addition, the code | symbol 21b in the figure is a hole for temporary fixing formed smaller than another hole.

  The thickness of the rod-like (including strip-like) leaf spring 4 is the width of the concave groove of the base 7, for example, 4.5 mm, which is thinner than 5 mm, for example, and one end of this flat spring 4 is attached to both walls of the concave groove. When the support member 31 is movably supported, a gap G is formed between both walls of the concave grooves as the contact walls 7a and 23a. On the other hand, the other end of the leaf spring 4 is 0. 0 between the both walls as the contact wall 23a in the recessed groove of, for example, 5 mm of the base 23 provided on the outer surface of the flat portion of the steel plate 2 protruding from the window hole 13. A gap G of 5 mm is formed. Further, the steel plate 1 is formed with a screw hole 6 for attaching a cover 5 having a U-shaped cross section covering the support member 31 and the leaf spring 4.

  As shown in FIG. 16, the cover 5 has a U-shaped cross section, and is bent at both sides of the opening side at a right angle to form an attachment piece 51. The attachment piece 51 has an attachment screw 52 at a substantially central portion. A through hole 53 is formed.

  The viscoelastic body 3 is made of butyl rubber as a base material and mixed with a plurality of resins. The support plate 8 is a single flat plate as shown in FIG. 12, and integrally supports bolts 9 as a plurality of fixing members for fixing the pair of steel plates 1 and 2 to each other. In addition, the code | symbol 8a in a figure is an elliptical hole required at the time of plating.

  Next, how to assemble each of the above components will be described. First, as shown in FIG. 1, the steel plate 1 is provided with a contact wall 7a, and a support member 31 is attached to the contact wall 7a. The steel plate 2 is provided with a contact wall 23a as shown in FIG. Then, as shown in FIG. 6, the steel plates 1 and 2 are overlapped so that the mounting pieces 11 and 21 are orthogonal to each other, and a quadrangular viscoelastic body 3 is disposed between them, and the three provided for the support plate 8. The bolts 9 are passed from the three holes 22 of the steel plate 2 through the three holes 12 of the steel plate 1 so that the support plate 8 is superimposed on the steel plate, and the viscoelastic body 3 is also interposed between the steel plate 2 and the support plate 8. And the nut 10 is screwed onto the bolt 9 to fix the whole integrally. By fixing in this way, assembly becomes easy, and since a plurality of fixing members are integrated with the support plate 8, the number of parts used is small, handling is easy, and appearance is good.

  By this fixing, the contact wall 23 a provided on the steel plate 2 protrudes from the window hole 12 of the steel plate 1 to the outer surface of the steel plate 1. Therefore, the other end of the bar-shaped leaf spring 4 supported by providing a movable gap G between the support member 31 provided at one end outside the steel plate 1 and the abutting wall 7 a is connected to the steel plate 1 from the window hole 12. A movable gap G is provided between the contact wall 23a on the side of the steel plate 2 protruding from the outer surface of the contact wall 7a, and the contact wall 7a, 23a, the support member 31 and the leaf spring 4 are covered with the cover 5. The cover 5 is attached to the steel plate 1 with a screw 53 screwed into the screw hole 6. By comprising in this way, there exists an effect that a leaf | plate spring and a mounting base are not exposed outside, and the external appearance after an assembly | attachment is good.

According to this embodiment, the viscoelastic body 3 is sandwiched between the steel plates 1 and 2, and the gap G is movable between one end of the rod-like leaf spring 4 and the contact wall 7 a of one steel plate 1. Is provided and supported, and the other end is disposed with a movable gap G between the contact wall 23a of the other steel plate 2. Therefore, the vibration damping device having this structure is attached to the structure. When vibration due to an earthquake or the like is applied to the building in a state where the vibration is small, the relative displacement movement of the steel plates 1 and 2 is small during the slight vibration (for example, 1/240 rad to 1/60 rad). Since the spring 4 only moves in the gap and does not contact the contact walls 7a and 23a, no external force is applied and deformation does not occur. However, due to the small relative displacement of the pair of steel plates 1 and 2, the viscoelastic body 3 that is in surface contact with the steel plates 1 and 2 undergoes shear deformation, and vibration is efficiently absorbed by the resistance force associated with the shear deformation. And can exert a damping force.

  On the other hand, when a large vibration (for example, 1/60 rad to 1/15 rad) that cannot be absorbed only by deformation of the viscoelastic body is applied, the rod-shaped leaf spring 4 is caused by a large relative displacement movement of both the steel plates 1 and 2. One end is pressed by the abutting wall 7a and the other end is pressed by the abutting wall 23a, and each moves in the gap G in the opposite direction. For this reason, the bar-shaped plate spring 4 is deformed according to the magnitude of the applied pressing force, and large vibrations are efficiently absorbed by the elastic restoring force of the plate spring 4 due to this deformation, and a damping force can be exhibited. . Although the number of the bar-shaped leaf springs 4 may be one, if n pieces are arranged in parallel as in the illustrated example, vibrations of n times can be absorbed. Further, as shown in the example, when the viscoelastic body 3 is also sandwiched between the steel plate 1 and the support plate 8, the damping force due only to the resistance force accompanying the shear deformation of the viscoelastic body 3 can be increased. There is an effect that vibration energy due to earthquakes, transportation, wind, etc. can be absorbed more efficiently and a damping force can be exhibited.

As a result, any vibration energy applied by an earthquake or the like can be efficiently absorbed and a damping force can be exerted by the combination of the resistance force accompanying the shear deformation of the viscoelastic body 3 and the elastic restoring force of the leaf spring 4. . In addition, the structure is simple, lightweight and downsized, easy to handle, requires no maintenance, and can be used semipermanently.

  FIGS. 17 and 18 are a plan view and a front view of a vibration damping structure showing a state in which the vibration damping device assembled as described above is used to increase the durability and vibration resistance of a wooden house as a structure. Yes, the mounting piece 11 of one steel plate 1 constituting the vibration damping structure is attached to the column 16 with wood screws 40 or nails, and the mounting piece 21 of the other steel plate 2 is similarly attached to the beam 17 with wood screws 41 etc. It is a thing. FIG. 17 is a schematic diagram showing the use state of the vibration damping device. The cover 5, the plate spring 4 covered with the cover, and the contact walls 7 a and 23 a for arranging the end portions of the plate spring are shown in FIG. Shown with dotted lines.

  By attaching the vibration damping device to the structure in this way, when the column 16 and the beam 17 are to be displaced by the external force acting on the beam 17 from the column 16, first, while the small vibration is applied, the viscoelastic body The vibration of 3 is efficiently absorbed and the damping force is exhibited. When a large vibration is applied, the rod-shaped leaf spring 4 comes into contact with the contact wall 7a at one end and the contact wall 23a at the other end due to relative movement of the steel plates 1 and 2. It contacts and deforms according to the pressing force received from these abutting walls, functions to absorb large vibrations efficiently and consume all vibration energy efficiently. As a result, as shown in FIGS. 17 and 18, the displacement due to the vibration energy can be extremely reduced by the vibration damping structure using the vibration damping device according to the above embodiment.

  The steel plate 1 and the steel plate 2 are fixed by three bolts 9. The bolt 9 is designed to be movable in a hole 22 formed in the steel plate 2, and the range of the hole 22 is as follows. It is set so as to be able to cope with the shear deformation of the viscoelastic body 3 due to the maximum difference due to vibration. Therefore, vibration energy caused not only by earthquakes but also by vibrations caused by traffic and wind transmitted to the building can be attenuated efficiently and reliably.

  As described above, according to this embodiment, when the external force acting on the beam 17 from the column 16 is small, the external force is large only by the shear deformation of the viscoelastic body 3 that is a component of the vibration damping device. In some cases, it is suppressed by the shear deformation of the viscoelastic body 3 and the elastic restoring force of the leaf spring 4 which are components of the vibration damping device. As a result, it functions to efficiently consume all vibration energy, so that vibration energy caused by traffic and wind transmitted to the building as well as earthquakes can be attenuated smoothly and efficiently and reliably. It can exert a vibration control effect.

  According to the above embodiment, the contact wall 7a is provided on the outer side of the steel plate 1. This contact wall 7a is provided in the cover 5 in advance, and the support member 31 is attached to the contact wall 7a. One end of the leaf spring 4 may be supported by the support member 31. In this case, the other end (free end) of the leaf spring 4 is provided with a movable gap G on the contact wall 23 a of the steel plate 2 protruding from the window hole 12 of the steel plate 1. Thereby, there is an effect that the number of components is reduced and the handling becomes easier.

  Further, contact walls 7a and 23a are provided on the opposing inner surfaces of the steel plates 1 and 2 attached to each other, and a support member 31 provided on the contact wall 7a is provided with a gap G capable of moving one end of the leaf spring 4 and supported. The gap G that can move the other end of the leaf spring 4 to the contact wall 23a may be provided. Also in this configuration, the thickness of the viscoelastic body 3 is set to be equal to or higher than the height of the contact walls 7a and 23a, that is, the viscoelastic body is brought into surface contact with the opposed inner surfaces of the steel plates 1 and 2. All vibrational energy can be made efficient by the combination of the resistance force accompanying the shear deformation of the body and the elastic restoring force of the leaf spring.

  In the vibration damping device of the above embodiment, a plurality of protrusions are formed on the steel plates 1 and 2 to position the overlapping positions. And the notch part 3a is each formed in each corner | angular part in the viscoelastic bodies 3 and 3 so that the protrusion on these steel plates may not contact | abut. In this example, the attachment pieces 11 and 21 are sufficiently thick to increase the attachment strength.

  In each of the above examples, a steel plate is used as a material for sandwiching the viscoelastic body. However, the vibration damping device of the present invention is not limited to a steel plate in material and may be a flat plate. Similarly, in each of the above examples, a bar-shaped leaf spring has been described. However, any member having any of an elastic restoring force, a rigidity ability, and a damping ability may be used.

1 is an exploded perspective view of a vibration damping device showing an embodiment of the present invention. It is a top view of the damping device which shows the assembly state before attaching a cover. 2 is a front view of the vibration damping device. It is a top view of the vibration damping device which shows the assembly state which attached the cover. It is a surface side perspective view of an assembly state. It is a back surface side perspective view of an assembly state. FIG. 6 is an enlarged cross-sectional view taken along line AA in FIG. 5. It is a top view which shows one steel plate. It is a left view of the steel plate of FIG. It is a top view which shows the other steel plate. It is a left view of the steel plate of FIG. It is a top view of a support plate. It is a top view which shows the relationship between a rod-shaped leaf | plate spring and a contact wall. FIG. 14 is a front view of FIG. 13. FIG. 14 is a left side view of FIG. 13. It is a top view of the cover attached to the outer surface of one steel plate. It is a top view which shows the attachment state of a damping device. It is a front view of FIG. It is a use state figure of the conventional damping device. It is the figure seen from the arrow direction of FIG. It is a use condition figure of the damping device of FIG.

Explanation of symbols

1 One steel plate (flat plate)
2 The other steel plate (flat plate)
3 Viscoelastic body 3a Notch 4 Leaf spring (spring member)
5 Cover 6 Screw hole 7 Base 7a Abutting wall 8 Support plate 8a Elliptical hole 9 Bolt (fixing member)
DESCRIPTION OF SYMBOLS 10 Nut 11 Attachment piece 12 Hole 13 Window hole 16 Column 17 Beam 21 Attachment piece 22 Hole 23 Base 23a Abutting wall 23b Through-hole 31 Support member 32, 33 Reinforcement material 32a, 33a Hole 40, 41 Wood screw 51 Attachment piece 52 Screw 53 Through-hole G Gap

Claims (8)

A pair of substantially identical flat plates each having a mounting piece bent at a right angle on one side, a viscoelastic body sandwiching the pair of flat plates between the two flat plates so that the mounting pieces are orthogonal to each other, and In the vibration damping device composed of a support member attached between the contact walls provided with a space on the surface of the flat plate, the support member is supported with a gap that is movable between one end and the contact wall, A vibration damping device comprising: a spring member provided with a movable gap between the other end and an abutting wall provided on the surface of the other flat plate at an interval. One end of the spring member is supported by a support member attached between the contact walls provided on the surface of one flat plate with a movable gap between the spring member and the other end provided on one flat plate. 2. The vibration damping device according to claim 1, wherein a movable gap is provided between the first flat plate protruding from the window hole and a contact wall provided on the surface of the flat plate. 3. The vibration-damping fitting according to claim 1, wherein a cover for covering the contact wall, the support member, and the spring member is provided on the surface of one of the flat plates. 4. The vibration damping device according to claim 3, wherein the cover is provided with a support member for supporting an end portion of the spring member. The vibration damping device according to claim 1 or 2, further comprising a support plate integrally provided with a plurality of fixing members for fixing the pair of flat plates. 2. The vibration damping device according to claim 1, further comprising a viscoelastic body disposed between the superposed one flat plate and the support plate. 7. The vibration damping device according to claim 1, wherein each flat plate is made of a steel plate, and the spring member is a rod-like plate spring. The vibration damping device according to any one of claims 1 to 6, wherein one flat plate of the vibration damping device is attached to a pillar of the structure, and the other flat plate is attached to a beam or a base of the structure. Damping structure characterized by

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