JP2006241934A - Damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper device capable of absorbing shear force and also energy of bending moment as well as axial force. <P>SOLUTION: The damper device includes the first plate material 11 interconnecting a friction damper 10 to one site in a beam-column framing, the second plate material 12 mounted to the other site in the beam-column framing and arranged so as to partially overlap with the first plate material 11, a friction material 13 mounted to an overlapped part of the first plate material 11 with the second plate material 12 and a belleville spring 14 as a means pressuring the friction material 13, the first plate material 11 and the second plate material 12, and at least one of the first plate material 11 and the second plate material 12 can be deformed in the optional direction in the beam-column framing. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damper device, and more particularly to a damper device for use in vibration control of a building frame.

  Dampers used in the damper device are classified into friction dampers and viscoelastic dampers according to an energy absorption mechanism. Among these, the friction damper absorbs vibration energy by frictional resistance, and can absorb energy very effectively against a large amplitude external force.

For example, Patent Document 1 discloses a damper device having a configuration in which such a friction damper and a viscoelastic damper are connected in series. According to such a damper device, energy is absorbed by a viscoelastic damper for a small amplitude load, and energy is absorbed by a friction damper for a large amplitude load, from a small amplitude to a large amplitude. The vibration control effect can be exhibited over a wide range of vibration loads.
JP-A-9-268802

  As can be seen from the configuration of the damper device of Patent Document 1, the conventional friction damper is configured to be displaceable only in one direction (axial direction), and exhibits an energy absorption effect only with respect to a force in this direction. For this reason, when the vibration of the column beam structure of the building is controlled by the friction damper, it is necessary to attach the friction damper in a brace shape, for example, so that an axial force is applied to the friction damper.

  When a column beam structure of a building is subjected to a horizontal external force such as a wind load or an earthquake load, a deformation combining shear deformation and bending deformation occurs. Therefore, not only an axial force but also a shearing force and a bending moment act on the friction damper attached to the column beam frame in a brace shape. However, the friction damper cannot absorb the energy of the shearing force and the bending moment and cannot expect a sufficient damping effect. Therefore, in order to give a high damping effect to the friction damper and the damper device using the friction damper, it is desirable to have a configuration that can absorb not only the axial force but also the energy of the shearing force and the bending moment.

  Accordingly, an object of the present invention is to provide a damper device capable of exhibiting a high vibration damping effect by absorbing not only axial force but also shearing force and bending moment energy.

  The damper device of the present invention is a damper device for absorbing vibration energy generated in a building frame, the first member attached to one part of the frame, and attached to another part of the frame, A second member provided so as to be at least partially overlapped with the first member so as to be relatively displaceable in an arbitrary direction within a frame surface with respect to the first member; the first member; A friction material interposed in a portion where the second member overlaps, and a pressing means for pressing the friction material, the first member, and the second member.

  According to the above-described damper device, energy can be absorbed not only with respect to the axial stress but also with respect to the shear stress and the bending moment, so that a higher vibration damping effect can be obtained.

  The damper device of the present invention is a damper device for absorbing vibration energy generated in a building frame, and includes a first member attached to one part in the frame, the first member and at least a part thereof. The second member provided so as to be relatively displaceable in an arbitrary direction within the frame surface with respect to the first member, and the first member and the second member overlapped so as to overlap each other. A friction material interposed in the part, a pressing means for pressing the friction material, the first member, and the second member, and a third member provided integrally with the second member; A fourth member attached to another part of the frame and disposed so as to at least partially overlap the third member, and an intervening portion where the third member and the fourth member overlap. A viscoelastic body.

  According to the damper device of the present invention, energy can be efficiently absorbed from vibration energy having a small amplitude to vibration energy having a large amplitude, and a higher vibration damping effect can be obtained.

  Since the energy of the axial force, shearing force and bending moment applied to the damper device can be absorbed, the energy acting on the column beam frame due to the seismic load or wind load can be efficiently absorbed, and the damping effect can be improved.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a state in which a friction damper 10 as a damper device according to a first embodiment of the present invention is attached to a column beam frame 40. FIG. 2 is a front view showing a detailed configuration of the friction damper 10, and FIG. 2 is a cross-sectional view of the friction damper 10.
As shown in FIG. 1, the friction damper 10 is installed between the columns 41 of the column beam structure 40 of the building, and the upper end of the friction damper 10 is connected to a bundle member 43 provided on the upper beam 42. The lower end of the friction damper 10 is connected to a bundle 45 provided on the lower beam 44.

  As shown in FIG. 1, the friction damper 10 of the present invention includes a first plate member 11 as a first member attached at one end to an upper bundle member 43 in the column beam frame, and one end in the column beam frame. A second plate member 12 as a second member, which is attached to the lower bundle member 45 and arranged so that the other end overlaps the first plate member 11, and a portion where the first plate member 11 and the second plate member 12 overlap. And a disc spring unit 14 as a means for pressing the first plate member 11, the second plate member 12, and the friction member 13.

  The first plate member 11 includes a loose hole 18 through which the bolt 16 is inserted at a portion overlapping the second plate member 12. The loose hole 18 is a circular hole having a larger diameter than the diameter of the bolt 16.

  In addition, the second plate member 12 includes an insertion hole 19 for inserting the bolt 16 in a portion overlapping the first plate member 11. The diameter of the insertion hole 19 provided in the second plate member 12 is substantially equal to the diameter of the bolt 16, and the bolt 16 can be inserted without a gap. A second plate member 12 is attached to the front and back surfaces of the first plate member 11 via a friction member 13, respectively. The insertion hole 19 of the second plate material is such that the center of the loose hole 18 of the first plate material 11 and the center of the insertion hole 19 of the second plate material 12 substantially coincide when the first plate material 11 and the second plate material 12 are overlapped. Is provided.

  The disc spring unit 14 includes a plurality of disc springs 15, bolts 16 inserted through the disc springs 15, and nuts 17 attached to the bolts 16. When the disc spring unit 14 is assembled, the first plate member 11 and the second plate member 12 are overlapped via the friction member 13, and the bolt 16 is connected to the loose hole 18 of the first plate member 11 and the insertion hole 19 of the second plate member 12. Then, the head of the bolt 16 is brought into contact with the second plate member 12, and a plurality of disc springs 15 are inserted into the shaft portion of the bolt 16 to tighten the nut 17. Thereby, the disc spring 15 is compressed, and the friction force is ensured by pressing the first plate member 11, the second plate member 12 and the friction member 13 by the compression force of the disc spring 15.

  As described above, since the diameter of the loose hole 18 provided in the first plate member 11 is larger than the diameter of the bolt 16, the first plate member 11 and the second plate member 12 can be relatively displaced in any direction within the frame surface. It is. That is, the first plate member 11 and the second plate member 12 can be displaced relative to each other vertically and horizontally in the frame plane direction, and can also rotate and move relative to each other in this plane.

Next, the operation of the friction damper 10 will be described.
As described above, since the first plate member 11 and the second plate member 12 of the friction damper 10 are connected to different parts of the column beam frame 40, when the column beam frame 40 is deformed, a shear force (see FIG. (Force in the middle / left / right direction), axial force (force in the up / down direction in the figure), and bending moment act. Therefore, a case where shearing force, axial force, and bending moment are applied to the friction damper 10 will be described.

  First, as shown in FIG. 4, when a shear force is applied to the friction damper 10, the shear force acting on the friction damper 10 is the static friction force between the friction material 13 and the first plate material 11 and the second plate material 12. The first plate member 11 and the second plate member 12 are relatively displaced in the horizontal direction, and energy is absorbed by the frictional force generated between the first plate member 11 and the second plate member 12 with the friction member 13. As described above, the friction damper 10 can absorb the energy of shear deformation when a shearing force of a certain level or more is applied.

  Further, as shown in FIG. 5, when the axial force acts on the friction damper 10, as in the case where the shear force acts, when the axial force acting on the friction damper 10 becomes a certain level or more, the first plate member 11 and the second plate member. 12 is relatively displaced in the axial direction, and at this time, energy is absorbed by a frictional force generated between the friction material 13 and the friction material 13.

  Furthermore, as shown in FIG. 6, when a bending moment is applied to the friction damper 10, a force corresponding to this bending moment acts between the friction material 13 and the first plate material 12 and the second plate material 12. When this force exceeds the static frictional force between the friction material 13 and the first plate material 11 and the second plate material 12, the first plate material 11 and the second plate material 12 relatively rotate and move in the frame surface. The energy is absorbed by the frictional force generated with the friction material 13.

  When the column beam structure 40 of the building receives a horizontal force due to seismic load or wind load, the column beam structure 40 undergoes a combination of shear deformation and bending deformation, and the friction attached to the column beam structure 40 accordingly. A shearing force, an axial force, and a bending moment act on the damper 10. As described above, the friction damper 10 of the present invention can absorb energy by frictional force with respect to any of shearing force, axial force, and bending moment, so that high vibration damping performance can be obtained.

  In addition, in the junction part of the 1st board | plate material 11 and the 2nd board | plate material 12, the position which installs the friction material 13 and the disc spring unit 14 is not limited to said arrangement | positioning. For example, as shown in FIG. 7, by placing the loose hole 18, the insertion hole 19, and the disc spring unit 14 near the outer edges of the first plate member 11 and the second plate member 12, a larger frictional force is generated, and more It can absorb the energy of a large bending moment.

(Second Embodiment)
Next, a second embodiment of the damper device of the present invention will be described. The damper device 30 according to the second embodiment of the present invention is also attached to the column beam frame between the upper and lower beams in a columnar manner, similarly to the friction damper 10 described above.

  FIG. 8 is a front view of the damper device 30 of the present invention, and FIG. 9 is a cross-sectional view of the damper device 30. As shown in FIGS. 8 and 9, the damper device 30 has a configuration in which the friction damper 10 and the viscoelastic damper 20 of the first embodiment are connected in series. The first plate 11 of the friction damper 10 is connected to the lower beam 44 side, and the second plate 12 is connected to the upper beam 42 via the viscoelastic damper 20. The viscoelastic damper 20 includes a third plate member 21 as a third member, a fourth plate member 22 disposed so as to partially overlap the front and back surfaces of the third plate member 21, and the third plate member 21 and the fourth plate member 22. And a viscoelastic body 23 interposed in the overlapping portion.

  In this embodiment, the viscoelastic damper 20 is disposed on the upper side and the friction damper 10 is disposed on the lower side. However, the friction damper 10 may be disposed on the upper side and the viscoelastic damper 20 may be disposed on the lower side. Further, the position of attachment to the column beam frame 40 is not limited to the inter-column shape, and may be attached to the brace shape.

  According to the damper device 30 of the present embodiment, the vibration energy is absorbed by shear deformation of the viscoelastic body 23 of the viscoelastic damper 20 against a force smaller than the frictional force of the friction damper 10. Therefore, according to the present embodiment, it is possible to obtain a damping effect for a wide range of vibration energy from small vibration energy such as wind load to large vibration energy such as earthquake load.

  In addition, as described in the first embodiment, the friction damper 10 can exhibit a damping effect against any of shearing force, axial force, and bending moment, and the viscoelastic damper 20 is Due to its configuration, the viscoelastic body 23 can absorb energy by shear deformation with respect to any of shearing force, axial force, and bending moment. Therefore, according to the damper device 30 of the present embodiment, energy can be effectively absorbed with respect to any of axial force, shearing force, and bending moment, and a higher vibration damping effect can be obtained.

It is a front view which shows a mode that a damper apparatus is attached to the column beam frame of a building. It is a front view of the friction damper of the present invention. It is sectional drawing of the side direction of the friction damper of this invention. It is a figure which shows the junction part of a 1st board | plate material and a 2nd board | plate material when shearing force worked to the friction damper. It is a figure which shows the junction part of the 1st board | plate material and 2nd board | plate material when axial force has acted on the friction damper. It is a figure which shows the junction part of the 1st board | plate material when a bending moment acted on the friction damper, and the 2nd board | plate material. It is a figure which shows the modification of a friction damper. It is a front view of the damper device of the present invention. It is side surface sectional drawing of the damper apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Friction damper 11 1st board | plate material 12 2nd board | plate material 13 Friction material 14 Belleville spring unit 15 Belleville spring 16 Bolt 17 Nut 18 Loose hole 19 Insertion hole 20 Viscoelastic damper 21 3rd board | plate material 22 4th board | plate material 23 Viscoelastic body 30 Damper apparatus 40 Column beam frame 41 Column 42, 44 Beam 43, 45 Bundle

Claims (3)

A damper device for absorbing vibration energy generated in a building frame,
A first member attached to one part of the frame;
The second member is attached to another part of the frame and is provided so as to be relatively displaceable in any direction within the frame surface with respect to the first member so as to at least partially overlap the first member. Members,
A friction material interposed in a portion where the first member and the second member overlap;
A damper device comprising: a pressing unit that presses the friction material, the first member, and the second member. A damper device for absorbing vibration energy generated in a building frame,
A first member attached to a part of the frame;
A second member provided so as to be relatively displaceable in an arbitrary direction within a frame surface with respect to the first member so as to at least partially overlap the first member;
A friction material interposed in a portion where the first member and the second member overlap;
Pressing means for pressing the friction material and the first member and the second member;
A third member provided integrally with the second member;
A fourth member attached to another part of the frame and arranged to at least partially overlap the third member;
A damper device comprising: a viscoelastic body interposed in a portion where the third member and the fourth member overlap each other. 3. The damper device according to claim 1, wherein the friction material and the pressing unit are arranged on an outer edge portion of an overlapping portion of the first member and the second member. 4. apparatus.

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