JP2000266112A - Vibration control device and vibration control structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device and vibration control structure capable of reducing both of vibration on an upper floor of a building and vibration to be transmitted from the upper floor to a lower floor. SOLUTION: A vibration control device 18 is furnished with a rod member 36, a damper 38 installed on an end part of the rod member and free to move concerning the longitudinal direction of the rod member and a tuning mass damper 40 free to move concerning the longitudinal direction of the rod member, and it can be furnished with an adjusting member installed on the other end part of the rod member. The vibration control device is vertically arranged between an upper floor and a lower floor 12, 22 of the building or horizontally between both beams opposed each other on the same floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device and a vibration damping structure having a vibration source for reducing vibrations in a building hierarchy.

[0002]

2. Description of the Related Art Conventionally, vertical vibrations on the upper floor of a building having a plurality of stories, for example, vibrations of the upper floor caused by the operation of an electric pump, a compressor, a machine tool or the like (vibration source) are reduced. As a vibration damping device, there have been proposed a device including a rod member and a damper attached to one end of the rod member, and a device including a tuned mass damper utilizing a resonance phenomenon.

The former vibration damping device having a damper is disposed between the upper and lower floors in the vertical direction, and is fixed to both the upper and lower floors at both upper and lower ends thereof. The vibration device is installed on the upper floor.

According to the former vibration damping device, the vibration of the upper floor is attenuated by the operation of the damper. Further, according to the latter vibration damping device, vibration of a specific frequency generated on the upper floor is reduced.

[0005] However, the former vibration control device has a problem that part of the vibration on the upper floor is transmitted to the lower floor. In addition, the vibration control device of the latter does not cause a vibration transmission problem in the vibration control device of the former, but cannot reduce vibrations other than vibration of a specific frequency, and has a vibration control device installed on the floor. There has been a problem that the vibration device causes a decrease in workability and livability on the floor.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration damping device and a vibration damping structure capable of reducing both vibration on the upper floor of a building and vibration transmitted from the upper floor to the lower floor. It is in. Another object of the present invention is to
It is an object of the present invention to provide a vibration damping device and a vibration damping structure that can reduce both vibration of a specific frequency and other vibrations and that do not cause deterioration in workability and livability on the upper floor.

[0007]

A vibration damping device according to the present invention comprises a rod member, a damper attached to one end of the rod member and operable in a longitudinal direction of the rod member.
A tuning mass damper attached to the bar member and operable in a longitudinal direction of the bar member. Another vibration damping device of the present invention further includes a length adjusting member attached to the other end of the rod member.

[0008] Still another vibration damping device of the present invention is a pair of rod members arranged on a line and spaced from each other, and disposed between the rod members on the line and attached to the rod members. , A damper operable in a longitudinal direction of the bar member, and a tuning mass damper attached to one of the two bar members and operable in the longitudinal direction of the bar member. Still another vibration damping device of the present invention further includes a length adjusting member attached to at least one end of the both bar members.

In the vibration damping structure of the present invention, the vibration damping device is disposed between the upper floor and the lower floor of the building so as to face up and down.
The vibration damping device is fixed to the upper and lower floors at both ends.

Further, in another vibration damping structure according to the present invention, the vibration damping device is disposed horizontally between a pair of opposing beams on an arbitrary floor instead of between the upper and lower floors of a building. Are fixed to the beams at both ends.

[0011]

According to the present invention, the vertical (longitudinal) vibration generated on the upper floor of the building is controlled by a vibration damping device arranged on both the upper and lower floors and a vibration damping structure including the same. Further, vibrations in the horizontal direction (horizontal direction) generated on the upper floor of the building can be reduced by a vibration damping device and a vibration damping structure including the same, which are arranged with respect to both beams facing each other on the upper floor. it can.

The vertical or horizontal vibration is reduced by the damper operable in the longitudinal direction of the rod member, that is, in the vibration direction, and the vibration of a specific frequency among the vibrations is reduced by the rod member. Tuned by a tuned mass damper operable in the longitudinal direction. That is, the vibration is reduced by both the damper and the tuned mass damper.

For this reason, compared with the case of vibration reduction performed using only one of the damper and the tuning mass damper, the vertical vibration on the upper floor and the vertical vibration transmitted from the upper floor to the lower floor are reduced. Vibration and both can be greatly reduced. In addition, it is possible to significantly reduce lateral vibration on the upper floor.

Further, since the tuning mass damper is incorporated in the vibration damping device, and the vibration damping device is installed between the upper and lower floors or between the beams, the conventional vibration damper is generated with the conventional arrangement on the floor slab. It is possible to avoid a decrease in workability and habitability on the floor slab. The entire length of the vibration damping device can be easily changed and adjusted by the length adjusting member in accordance with the interval between both floors or both beams where the vibration damping device is installed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, an electric pump, a compressor, a machine tool, etc. (vibration generating source) 14 are installed on a floor slab 12 on an upper floor of a building 10 having a plurality of stories. The operation of the vibration source 14 causes longitudinal vibration (vertical vibration) in the floor slab 12 (arrow 1).
6).

In the building 10, in order to reduce the longitudinal vibration,
A vibration damping structure 20 including a vibration damping device 18 is provided.

The vibration damping devices 18 are arranged vertically above and below the floor 10 of the building 10, that is, between these floor slabs 12 and 22, and are fixed to both floor slabs 12 and 22 at both ends.

On the other hand, on the floor slab 12 on the upper floor of the building 10 shown in FIG. 2, a vibration source 24 composed of a machine which repeats horizontal movement and its stop, a machine including a part which repeats horizontal movement inside, etc. is provided. Is installed, vibration source 2
The operation of 4 causes lateral vibration (horizontal vibration) (see arrow 26) in the floor slab 12. The vibration source 24 includes
In addition to the installation machine, occupants and workers moving on the floor slab 12 are also included.

A damping structure 30 including a damping device 28 is provided in the building 10 to reduce the lateral vibration.

The vibration damping device 28 is horizontally arranged between a pair of horizontal beams 32 and 34 facing each other on the upper floor of the building 10 and is fixed to both beams 32 and 34 at both ends.

Referring again to FIGS. 1 and 2, the vibration damping device 18 for reducing longitudinal vibration and the vibration damping device 28 for reducing lateral vibration both have the same components. That is, the rod member 36, attached to one end of the rod member,
It includes a damper 38 operable with respect to the longitudinal direction of the bar member 36 and a tuned mass damper 40 attached to the bar member 36 and operable with respect to the longitudinal direction of the bar member.

Further, a length adjusting member 42 (see FIG. 3) attached to the other end of the bar member 36 and movable in the longitudinal direction of the bar member can be included.
The damper 38 and one end of the rod member 36 or the length adjusting member 42 are substantially respectively provided with the vibration damping devices 18 and 2.
8 are defined.

The length adjusting member 42 is, for example, a screw member which penetrates a plate member (not shown) fixed to the other end of the rod member 36 made of a steel pipe and is screwed to this. By rotating the screw member 42 around its axis and moving the screw member 42 in and out of the rod member 36, the rod member 36 is adjusted to the distance between the floor slabs 12 and 22 or the distance between the beams 32 and 34.
(Or the overall length of the damping devices 18, 28) can be substantially varied.

The rod member 36 is made of, for example, a steel pipe having a circular or rectangular cross section.

The damper 38 comprises, for example, a hydraulic damper (FIG. 3), a viscoelastic damper (FIG. 4) and the like.

Each of the vibration damping devices 18 and 28 is connected via a pair of mounting plates 48 provided with a plurality of bolt holes (not shown).
Can be attached to buildings. The two mounting plates 48 are fixed to distal ends of a piston rod 44 (FIG. 3) of the hydraulic damper, a viscoelastic body 46 (FIG. 4) of the viscoelastic damper, and a distal end of the length adjusting member 42, respectively. Have been.
When the length adjusting member 42 cannot be attached,
The mounting plate 48 is directly fixed to the other end of the bar member 36.

To mount the vibration damping device on a building, a plurality of anchor bolts (not shown) provided in advance on each of the floor slabs 12 and 22 are passed through bolt holes of each mounting plate 48 and nuts (not shown). ), And a plurality of bolt holes (not shown) provided in advance in each of the beams 32 and 34.
By passing a bolt (not shown) through the bolt hole of each mounting plate 48 and screwing a nut to the bolt.

The tuning mass damper 40 can be disposed and fixed, for example, in a cavity (not shown) formed by removing a part of the bar member 36.

As shown in FIGS. 5 to 8, the tuned mass damper 40 includes a closed cylindrical casing 50, a weight 52 disposed in the casing 50 so as to be movable in the axial direction thereof, and a Damping means 54 and weight 52
And a spring member 56 connected thereto.

The weight of the weight 52 is determined based on the magnitude of the natural period of the vibration of the floor slab 12 so that it can resonate with the floor slab 12 to be vibrated.

The damping means 54 comprises a viscous fluid (FIG. 5), a hydraulic damper (FIGS. 6 and 8) and the like. The spring member 56 is made of, for example, a coil spring (FIGS. 5, 6, and 8).

In the example shown in FIG. 5, a weight 52 in a casing 50 oriented vertically is placed on a coil spring 56 arranged in the casing 50 and extending in the vertical direction. Are fixed to the lower end of the weight 52 and the lower end of the casing 50, respectively. Also,
Most of the weight 52, except for its upper part, is immersed in a fluid 54 having a high viscosity enclosed in a casing 50.

Therefore, the casing 50 is connected to the rod member 36.
When it oscillates in the vertical direction, the weight 52
Starts to move and vibrates in the vertical direction under the action of the coil spring 56. At this time, the weight 52 receives the viscous resistance due to the fluid 54, and its amplitude is attenuated.

In the example shown in FIG. 6, instead of the viscous fluid 56, a hydraulic damper 54 for damping the weight 52 is disposed on the side opposite to the coil spring 56, and both ends thereof are connected to the upper end of the weight 52 and the casing 50. Is fixed to the upper end.

In the example shown in FIG. 7, a viscoelastic body 58 is mounted on the lower end of the casing 50, and the weight 52 is mounted on the viscoelastic body 58. Are fixed to the weight 52 and the casing 50 at both upper and lower ends thereof. The viscoelastic body 58 includes the weight 52
To both the viscous resistance and the elastic action.

Finally, the example shown in FIG. 8 is a tuned mass damper incorporated in the vibration damping device 28 shown in FIG. 2, which is substantially the same as the tuned mass damper shown in FIG. .

The tuned mass damper 40 has a weight 52
In order to reduce resistance to the movement of the casing 50, a pair of rollers 60 that can roll on the inner wall surface of the casing 50 in the axial direction is attached to the weight 52.

Referring now to FIG. 1, the vibration source 14
When a vertical vibration 16 is applied to the floor slab 12 from above, the vibration 16 is transmitted to the lower floor slab 22 via the vibration damping device 18.

During this time, the damper 38 of the vibration damping device 18 reduces the vertical vibration 16, and the vibration having a specific frequency of the vibration 16 is reduced by the tuned mass damper 40. As a result, both the vertical vibration 16 on the upper floor and the vertical vibration 16 transmitted to the lower floor are reduced.

Further, since the tuned mass damper 40 is disposed between the upper and lower floor slabs 12 and 22, the tuned mass damper 40 is less obstructive than when it is installed on the upper floor slab 12. Workability and comfortability can be minimized.

Referring now to FIG. 2, when a lateral vibration 26 is applied from the vibration source 24 to the floor slab 12, the vibration is transmitted to the vibration damping device 28 via the beams 32 and 34.

During this time, the damper 38 of the vibration damping device 28 moves the horizontal vibration 2 like the vibration damping device 18 related to the longitudinal vibration.
6 is attenuated, and the amplitude of the vibration having a specific frequency among the vibrations 26 is attenuated by the tuned mass damper 40. As a result, the horizontal vibration 26 on the upper floor is effectively reduced.

As a modified example different from the illustrated example, the damper is disposed between a pair of rod members and attached thereto.
There is also a vibration damping device (not shown) in which the tuning mass damper is attached to one of both rod members.

The two rod members and the damper are arranged on a line. The bar member is made of the same material as the bar member 36 described above. Both ends of the damper are fixed to respective ends of both bar members, and the tuning mass damper is attached to the bar member in the same manner as described above, and the damper and the tuning mass damper are respectively It is operable with respect to the longitudinal direction of the bar member, that is, the extending direction of the line.

Further, the length adjusting member may be attached to at least one end of the both rod members.

As described above, all of the vibration damping devices according to these modified examples are disposed between the upper and lower floors in the vertical direction, and both ends thereof are fixed to both floor slabs 12 and 22.
Alternatively, both beams 32 and 34 can be horizontally disposed and both ends thereof can be fixed to the beams 32 and 34 to form a vibration damping structure. In these variations, the end of each bar member or the length adjustment member substantially defines the end of the damping device.

Note that, instead of the above-described application example, both a vibration damping device for longitudinal vibration and a vibration damping device for lateral vibration can be applied to the same layer 12.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and can be implemented in various modes based on the basic concept for achieving the object of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a vibration damping device and a vibration damping structure for reducing vertical vibration.

FIG. 2 is a schematic diagram showing a vibration damping device and a vibration damping structure for reducing lateral vibration.

FIG. 3 is an enlarged front view of the vibration damping device.

FIG. 4 is an enlarged partial front view of an example of another vibration damping device.

FIG. 5 is a schematic longitudinal sectional view of an example of a tuning mass damper incorporated in the vibration damping device shown in FIG. 1;

FIG. 6 is a schematic vertical sectional view of another example of the tuning mass damper incorporated in the vibration damping device shown in FIG. 1;

FIG. 7 is a schematic longitudinal sectional view of still another example of the tuning mass damper incorporated in the vibration damping device shown in FIG. 1;

FIG. 8 is a schematic longitudinal sectional view of an example of a tuning mass damper incorporated in the vibration damping device shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 Building 12, 22 Floor slabs on upper and lower floors 14, 24 Vibration sources 16, 26 Vertical vibration and horizontal vibration 18, 28 Vibration suppression device 32, 34 Beam 36 Bar member 38 Damper 40 Tuning mass damper 42 Length Adjustment member

Claims (6)

[Claims] 1. A bar member, a damper attached to one end of the bar member and operable in a longitudinal direction of the bar member, and a damper attached to the bar member and operable in a longitudinal direction of the bar member. A vibration damping device including a tuned mass damper. 2. The vibration damping device according to claim 1, further comprising a length adjusting member attached to the other end of said rod member. 3. A pair of bar members spaced apart from each other on a line, and a pair of bar members is disposed between the two bar members and is attached to the both bar members, and moves in the longitudinal direction of the bar members. A damping device, comprising: a damper that is capable of being mounted and a tuned mass damper that is mounted on one of the rod members and is operable in a longitudinal direction of the rod member. 4. The apparatus according to claim 3, further comprising a length adjusting member attached to at least one end of said both rod members.
6. The vibration damping device according to 1. 5. The vibration damping device according to claim 1, which is disposed vertically between an upper floor and a lower floor of a building, wherein the vibration damping device has upper and lower floors at both ends thereof. The building's vibration control structure is fixed to the building. 6. The vibration damping device according to claim 1, which is horizontally arranged between a pair of beams on an arbitrary floor of a building, wherein the vibration damping device is provided on both beams at both ends. Fixed, vibration damping structure of the building.