JP2011163020A - Viscoelastic damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a viscoelastic damper device which is further miniaturized while preventing an excessive force from generating out of a viscoelastic body. <P>SOLUTION: This viscoelastic damper device installed between members constituting a building includes a first connection plate connected to one member side, a second connection plate connected to the other member side, and a third connection plate which is fixed to the first connection plate through the viscoelastic body and which is fixed to the second connection plate with fastening members. Elongated holes are formed in the second connection plate and the third connection plate in the mutually crossing directions, respectively. The third connection plate is attached to the second connection plate with the fastening members inserted into the elongated holes so as to be slidable on the second connection plate when a force generated from the viscoelastic body exceeds a specified value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a viscoelastic damper device that is installed in a house or the like and reduces shaking of a building due to an earthquake or wind.

  In recent years, damper devices for reducing shaking of buildings have been widely used. In a building where a damper device is installed, the amplitude when receiving an earthquake or wind is reduced, and the vibration can be attenuated at an early stage. There are various types of such damper devices, but a damper device using a viscoelastic body as an energy absorber (hereinafter referred to as “viscoelastic damper device”) is excellent in the degree of freedom of shape. Widely adopted.

  As a conventional viscoelastic damper device, for example, there is a damping damper described in Patent Document 1. The conventional damping damper includes a pair of internal steel plates, an intermediate steel plate disposed inside the internal steel plate, and a viscoelastic body disposed between the internal steel plate and the intermediate steel plate, and the internal steel plate and the intermediate steel plate, Is fixed with bolts through friction material. In this structure, when the force generated from the viscoelastic body exceeds a certain level, the intermediate steel plate slides in the direction of the force with respect to the internal steel plate.

JP 2007-247278 A

  The viscoelastic damper device as described above is useful in that an excessive force can be prevented from being generated from the viscoelastic body. This also contributes to preventing breakage of the viscoelastic body. However, from the viewpoint of further ensuring the degree of freedom in designing the building and reducing the cost of the device, it is desirable to provide a technology that can realize further downsizing of the device while preventing excessive force from being generated from the viscoelastic body. It is.

  The present invention has been made to solve the above problems, and provides a viscoelastic damper device capable of realizing further downsizing of the device while preventing excessive force from being generated from the viscoelastic body. With the goal.

  That is, the present invention is a viscoelastic damper device provided between members constituting a building, and includes a first connection plate connected to one member side and a second connection plate connected to the other member side. And a third connection plate fixed to the second connection plate by a fastening member while being fixed to the first connection plate via the viscoelastic body, the second connection plate and the third connection plate The connecting plate is provided with elongated holes in directions intersecting each other, and the third connecting plate slides relative to the second connecting plate when the force generated from the viscoelastic body exceeds a certain value. The viscoelastic damper device attached to the second connection plate by a fastening member passed through each elongated hole is provided so as to be possible.

  According to the viscoelastic damper device according to the present invention, it is possible to further reduce the size of the device while preventing an excessive force from being generated from the viscoelastic body.

It is a figure which shows the installation state of the viscoelastic damper apparatus which concerns on one Embodiment of this invention. It is a front view of the viscoelastic damper apparatus shown in FIG. FIG. 3 is a side view of FIG. 2. It is a figure which shows the 1st state of a viscoelastic damper apparatus. It is a figure which shows the 2nd state of a viscoelastic damper apparatus.

  In this viscoelastic damper device, when the force generated from the viscoelastic body exceeds a certain value, a part of the deformation of the viscoelastic body is caused by the third connecting plate sliding relative to the second connecting plate. Is borne. Thereby, it can prevent that excessive force generate | occur | produces from a viscoelastic body. This makes it possible to reduce the thickness of the viscoelastic body itself. Further, in this viscoelastic damper device, the long hole of the second connection plate through which the fastening member is passed and the long hole of the third connection plate are provided so as to intersect each other. Therefore, the third connection plate is slidable while rotating with respect to the second connection plate, compared with a case where the third connection plate simply slides linearly following the displacement of the second connection plate. The long hole can be shortened. Thereby, size reduction of an apparatus is achieved.

  The elongated hole of the second connecting plate extends in the displacement direction of the second connecting plate relative to the first connecting plate, and the elongated hole of the third connecting plate is the same as the elongated hole of the second connecting plate. It is preferable to extend in a direction orthogonal to the extending direction. In this case, a sufficient sliding amount of the third connection plate can be secured.

  In addition, a plurality of fastening members are provided at a predetermined interval, the long holes of the second connection plate are provided with a length through which the respective fastening members pass in common, and the long holes of the third connection plate are provided with the fastening members. It is preferable that a plurality are provided for each. Even in such a configuration, the long hole of the second connection plate can be shortened as compared with the case where the second connection plate is simply slid linearly following the displacement of the second connection plate. Therefore, downsizing of the apparatus can be ensured.

  Moreover, it is preferable that at least the second connection plate and the third connection plate are formed of a plated steel plate. In this case, the change with time of the friction coefficient between the second connection plate and the third connection plate can be suppressed.

  Hereinafter, preferred embodiments of a viscoelastic damper device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating an installation state of a viscoelastic damper device according to an embodiment of the present invention. As shown in FIG. 1, a viscoelastic damper device 1 is a device that absorbs energy applied to members such as columns 2 and beams 3 due to, for example, earthquakes and winds, and is a space surrounded by columns 2 and 2 and beams 3 and 3 In the part, it is installed so that the front-end | tip parts of the four square members 4 extended along a diagonal line from the intersection part of the pillar 2 and the beam 3 may be connected.

  As shown in FIGS. 2 and 3, the viscoelastic damper device 1 includes a first connecting plate 11 connected to two square members 4 and 4 extending from above, and two square members 4 and 4 extending from below. A pair of second connection plates 12 connected to the first connection plate 11 via the viscoelastic body 14 and a pair of bolts 18 (see FIG. 3) fixed to the second connection plate 12. Third connection plates 13 and 13 are provided.

  The first connection plate 11 is formed in a rectangular shape by, for example, a plated steel plate. One side of the first connecting plate 11 is a first fixing portion 11a that is fixed to the tip portions of the square members 4 and 4, and a plurality of (in this embodiment, five locations) bolt holes 21 are arranged in the width direction. Is provided. The other side of the first connecting plate 11 is a second fixing portion 11b to which the viscoelastic body 14 is fixed.

  Similarly to the first connection plate 11, the second connection plate 12 is formed in a rectangular shape by, for example, a plated steel plate, and is disposed on the substantially same plane as the first connection plate 11 with a predetermined interval. Yes. One side of the second connection plate 12 serves as a first fixing portion 12a fixed to the tip portions of the square members 4 and 4, and a plurality (five locations in the present embodiment) of bolt holes 22 are arranged in the width direction. Is provided. The other side of the second connection plate 12 is a second fixing portion 12b that is fixed to the other side of the third connection plate 13, and is a long hole (hereinafter referred to as a “lateral hole 16”) along the width direction. ") Is provided.

  The pair of third connection plates 13, 13 is formed in a rectangular shape by, for example, a plated steel plate, similarly to the first connection plate 11 and the second connection plate 12. It arrange | positions so that the 2 connection board 12 may be pinched | interposed. One side of the third connection plate 13 is a first fixing portion 13 a fixed to the other side of the second connection plate 12, and is in a direction orthogonal to the lateral hole 16 of the second connection plate 12. A long hole (hereinafter referred to as “longitudinal hole 17”) is provided. The vertical holes 17 are provided at predetermined intervals according to the number of bolts 18 (two in this embodiment) to be described later.

  The other side of the third connection plate 13 is a second fixing portion 13b to which the viscoelastic body 14 is fixed. A step portion 20 corresponding to the thickness of the viscoelastic body 14 is formed between the first fixing portion 13a and the second fixing portion 13b. The first fixing portion 13 a is in contact with the second fixing portion 12 b of the second connection plate 12 so that the vertical hole 17 and the horizontal hole 16 overlap with each other, and is a bolt passed through the vertical hole 17 and the horizontal hole 16. The second connecting plate 12 is fixed to the second fixing portion 12b of the second connecting plate 12 by 18 and a nut 19. The bolt 18 may be slightly inclined with respect to the normal direction of the second connection plate 12 and the third connection plate 13.

  The tightening force of the bolt 18 (axial force introduced to the bolt 18) is set in consideration of the friction coefficient of the sliding surface, the number of sliding surfaces, and the force (sliding load) at which sliding starts. . On the other hand, the second fixing portion 13b is disposed so as to face the second fixing portion 11b of the first connecting plate 11, and is attached to the second fixing portion 11b via the viscoelastic body 14. .

  The viscoelastic body 14 is formed in a rectangular sheet shape by a viscoelastic material such as an acrylic resin. The viscoelastic body 14 is disposed between the second fixing portion 11b of the first connection plate 11 and the second fixing portion 13b of the third connection plate 13, and is firmly fixed by, for example, adhesion or adhesion. Yes. In the second fixing portion 11b and the second fixing portion 13b, the adhesive surface with the viscoelastic body 14 has a desired effect such as enhancement of adhesive force such as shot blasting, film processing, or hot dip galvanizing. It is preferable to carry out a surface treatment for exhibiting it.

  Then, the effect of the viscoelastic damper apparatus 1 is demonstrated.

  When the column 2 is displaced with respect to the beam 3 by an earthquake or the like, the displacement is transmitted to the viscoelastic damper device 1 via the square member 4. At this time, in the viscoelastic damper device 1, the fixed state of the second connection plate 12 and the third connection plate 13 is maintained until the force generated from the viscoelastic body 14 exceeds a certain value. Therefore, as shown in FIG. 4, the viscoelastic body 14 undergoes shear deformation based on the difference between the displacement amount of the first connection plate 11 and the displacement amount of the second connection plate 12, and the deformation of the viscoelastic body 14. To absorb energy (first state).

  On the other hand, in the viscoelastic damper device 1, when the force generated from the viscoelastic body 14 exceeds a certain value, the fixed state of the second connection plate 12 and the third connection plate 13 is released, and the third connection plate 13 slides relative to the second connecting plate 12 (second state). As described above, in the viscoelastic damper device 1, when the force generated from the viscoelastic body 14 exceeds a certain value, the sliding of the third connecting plate 13 from the first state in which only the viscoelastic body 14 is deformed. By shifting to the second state in which the viscoelasticity 14 occurs, it is possible to prevent excessive force from being generated from the viscoelastic body 14. This enables the viscoelastic body 14 to be thinned.

  In the viscoelastic damper device 1, the horizontal hole 16 of the second connection plate 12 through which the bolt 18 is passed and the vertical hole 17 of the third connection plate 13 are provided in directions orthogonal to each other. Therefore, as shown in FIG. 5, in the second state, the third connection plate 13 can slide while rotating with respect to the second connection plate 12 in addition to linear sliding in the horizontal direction. It has become.

  Here, when the distance from the center position of the viscoelastic body 14 to the center position of the bolt 18 is L1 (see FIG. 2) and the rotation angle of the third connecting plate 13 is θ (see FIG. 5), The amount of absorption U1 due to the rotational displacement of the connecting plate 13 can be expressed by U1 = L1 × θ. The total absorption amount U is expressed by U = U1 (absorption amount due to rotational displacement) + U2 (absorption amount due to horizontal displacement). If the entire absorption amount U is to be absorbed by only horizontal displacement, it is necessary to make the length of the lateral hole 16 longer.

  On the other hand, the viscoelastic damper device 1 uses the rotational displacement of the third connecting plate 13 so that the amount of absorption due to the horizontal displacement can be reduced with respect to the same displacement amount. It can be shortened. Therefore, the width of the viscoelastic damper device 1 can be reduced, and the degree of freedom in installation and the cost reduction of the device can be realized. In addition, since the total absorption amount U with respect to the same rotation angle θ can be freely adjusted by adjusting the distance L1 described above, the viscoelastic damper device 1 having different specifications can be manufactured by a simple design change.

  Further, in the viscoelastic damper device 1, the lateral holes 16 of the second connection plate 12 extend with a length through which the bolts 18 pass in common, and the vertical holes 17 of the third connection plate 13 are two. Are provided at two locations corresponding to the bolt 18. In such a configuration, the long hole of the second connection plate can be shortened as compared with the case where the second connection plate is simply slid linearly following the displacement of the second connection plate. Therefore, downsizing of the viscoelastic damper device 1 is ensured. Moreover, the 2nd connection board 12 and the 3rd connection board 13 which are fixed with the volt | bolt 18 are formed with the steel plate by which the plating process was carried out. Thereby, the time-dependent change of the friction coefficient between the 2nd connection board 12 and the 3rd connection board 13 is suppressed, and the sliding load at the time of shifting to a 2nd state from a 1st state is kept constant. Can do.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the second connection plate 12 and the third connection plate 13 are fixed with two bolts 18, but the number of connection plates, the number of viscoelastic bodies 14, and the arrangement of the bolts 18 are arranged. The number, the arrangement interval, and the like can be changed as appropriate. When the number of the bolts 18 is changed, it is preferable that the vertical holes 17 are provided in the third connection plate 13 for each bolt 18.

  The place where the viscoelastic damper device 1 is attached is not limited to the pillar 2 or the beam 3 but may be attached to another building member such as a wall. The member that connects the building member and the viscoelastic damper device 1 is not limited to the square member 4, and for example, a trapezoidal board or an iron panel can be used.

  Further, a friction member may be interposed between the second connection plate 12 and the third connection plate 13. In this case, the friction coefficient between the second connection plate 12 and the third connection plate 13 can be further stabilized. If the thickness of the friction member is matched with the thickness of the viscoelastic body 14, it is not necessary to provide the step portion 20 on the third connecting plate 13, and the configuration can be simplified.

  DESCRIPTION OF SYMBOLS 1 ... Viscoelastic damper apparatus, 11 ... 1st connection board, 12 ... 2nd connection board, 13 ... 3rd connection board, 14 ... Viscoelastic body, 16 ... Horizontal hole (long hole), 17 ... Vertical hole (Long hole), 18 ... bolt (fastening member), 19 ... nut (fastening member).

Claims (4)

A viscoelastic damper device provided between members constituting the building,
A first connecting plate connected to one member side;
A second connection plate connected to the other member side;
A third connection plate that is fixed to the first connection plate via a viscoelastic body and fixed to the second connection plate by a fastening member;
The second connection plate and the third connection plate are each provided with a long hole in a direction crossing each other,
The third connecting plate is passed through the long holes so that the third connecting plate can slide with respect to the second connecting plate when a force generated from the viscoelastic body exceeds a certain value. A viscoelastic damper device attached to the second connecting plate by a fastening member. The elongated hole of the second connection plate extends in the displacement direction of the second connection plate with respect to the first connection plate,
2. The viscoelastic damper device according to claim 1, wherein the elongated hole of the third connecting plate extends in a direction orthogonal to the extending direction of the elongated hole of the second connecting plate. A plurality of the fastening members are provided with a predetermined interval,
The long hole of the second connection plate is provided with a length through which each of the fastening members passes in common,
The viscoelastic damper device according to claim 1, wherein a plurality of the long holes of the third connection plate are provided for each of the fastening members.   The viscoelastic damper device according to any one of claims 1 to 3, wherein at least the second connection plate and the third connection plate are formed of a plated steel plate.

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