JP7280746B2 - Building damping device - Google Patents

Description

The present invention relates to a damping device for buildings.

The tower ratio is the height of a building divided by its width and indicates how long and narrow a building is.
A building with a tower ratio of 4 or more is called a tower building, and includes steel towers, towers, high-rise buildings, and the like.
Such tower-like buildings are susceptible to large swaying when subjected to strong winds from typhoons or the force of seismic motion, and the phenomenon of the entire building floating (rocking vibration) can damage the building. Concerned.
On the other hand, conventionally, it has been proposed to provide vibration control weights that function as dampers or TMDs (tuned mass dampers) at multiple locations in a building to control vibrations in the building (Patent Documents 1 and 2). reference).

Japanese Patent Application Laid-Open No. 2006-336208 Japanese Patent Application Laid-Open No. 2008-31735

However, when a damper or damping weight is applied to a building with a high tower ratio, the effect of suppressing rocking vibration is not so high. There is room for improvement in effectively suppressing the rocking vibration of the building due to
SUMMARY OF THE INVENTION It is an object of the present invention to provide a damping device for a building that is advantageous in suppressing rocking vibration.

In order to achieve the above object, the present invention provides a vibration damping device for a building, comprising: a rotating shaft extending vertically and rotatably supported by the building; a flywheel provided rotatably integrally with the rotary shaft; a spin motor that imparts rotational force to the flywheel; an earthquake detection unit that detects the occurrence of an earthquake; a power supply unit that supplies power to the spin motor; and a rotation control unit that causes the spin motor to rotate the flywheel by supplying power from the power supply unit to the spin motor when the earthquake detection unit detects the occurrence of an earthquake.
Further, according to the present invention, a wind speed detection unit that detects the wind speed of wind hitting the building, and the rotation control unit detects the spin speed when the wind speed detected by the wind speed detection unit is equal to or higher than a predetermined value. The flywheel is rotated by the spin motor by supplying electric power to the motor.
Further, the present invention includes a vane body that is attached to the rotating shaft and rotates the rotating shaft by receiving wind, and a generator that generates power by rotation of the rotating shaft, and the power supply unit includes: It is characterized by including a secondary battery that is charged with power generated by a generator.
Further, the present invention is characterized in that the building is a tower-like building having a tower-like ratio of 4 or more.
Further, the present invention is characterized in that the tower-like building is a steel tower.
Further, according to the present invention, a plurality of the vibration damping devices are provided at intervals in the vertical direction of the building.

According to the present invention, when the occurrence of an earthquake is detected, the rotation control unit supplies power from the power supply unit to the spin motor to rotate the flywheel and the rotating shaft. The damping effect is exhibited by suppressing the shaking of objects.
Further, when the wind speed detected by the wind speed detection unit is equal to or higher than a predetermined value, the rotation control unit supplies power from the power supply unit to the spin motor, thereby causing the spin motor to rotate the flywheel. When the wind is strong due to a typhoon, etc., and the wind pressure acting on the building increases, and the building shakes, the gyroscopic effect of the flywheel and rotating shaft exerts a damping effect and prevents damage to the building. be advantageous.
Further, if a blade body for rotating a rotary shaft and a generator for generating power by the rotation of the rotary shaft are provided, and a secondary battery that is charged by the power generated by the generator is used as the power supply unit, the secondary battery can be used. The cost of charging the battery is reduced, which is advantageous in terms of energy saving. In addition, the vibration damping device can be operated even if a power failure of the commercial power supply occurs, and the vibration damping effect can be exhibited regardless of the operation status of the power facility due to an earthquake or typhoon. In addition, when strong winds such as typhoons blow, the wind rotates the rotating shaft by means of the blades. It is more advantageous in exerting the effect.
In addition, if a vibration damping device is installed in a tower-like building, shaking and rocking vibration of the tower-like building due to seismic motion or typhoon can be effectively suppressed, which is advantageous in preventing damage to the tower-like building.
In addition, if the tower-like building is a steel tower, it is possible to effectively suppress shaking and rocking vibration of the steel tower due to seismic motion and typhoon, which is advantageous in preventing damage to the steel tower.
In addition, when a plurality of vibration damping devices are installed at intervals in the vertical direction of the building, each vibration damping device exerts a gyroscopic effect by the flywheel and the rotating shaft, so that the vibration damping effect is exhibited more strongly. It is more advantageous in preventing damage to objects.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the high-rise building to which the damping device of the building of 1st Embodiment was applied. 1 is a block diagram showing the configuration of a control system of a vibration damping device for a building according to the first embodiment; FIG. It is a front view of a steel tower to which the damping device for buildings of the second embodiment is applied. It is a block diagram which shows the structure of the control system of the damping apparatus of the building of 2nd Embodiment.

(First embodiment)
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the first embodiment, a description will be given of a case where a vibration damping device for buildings (hereinafter simply referred to as a vibration damping device) of the present invention is applied to a high-rise building (high-rise building).
As shown in FIG. 1, the high-rise building 10 is a tower-like building with a tower-like ratio of 4 or more.
Since such a high-rise building 10 has an elongated structure, it is likely to experience a large tremor by receiving strong winds from a typhoon or by receiving the force of seismic motion, causing the entire building to float (rocking vibration). is likely to occur.
The high-rise building 10 has a building frame 10A, and an outer wall 12 covers the outer periphery of an internal space partitioned by the building frame 10A.
Each floor 15 is partitioned by a floor slab (ceiling slab) 14 .
In this embodiment, the damping device of this embodiment is provided on the top floor 15A of the high-rise building 10, the reference numeral 14A indicates the ceiling slab of the top floor 15A, and the reference numeral 14B indicates the floor slab of the top floor 15A. .

As shown in FIGS. 1 and 2, the vibration damping device 22A of the present embodiment includes a rotary shaft 24, a flywheel 26, a spin motor 28, an earthquake detector 30, a wind speed detector 32, and a power supply. 34 and a rotation control unit 36 are included.
The rotating shaft 24 extends linearly in the vertical direction, the upper end of the rotating shaft 24 is rotatably supported by an upper bearing portion 38 provided on the ceiling slab 14A, and the lower end of the rotating shaft 24 is provided on the floor slab 14B. The rotating shaft 24 is rotatably supported by the high-rise building 10 via the bearings 38, 40. As shown in FIG.
The length of the rotation axis 24 can be determined by multiplying the height of the high-rise building 10 (building) by a predetermined factor.
In this case, the higher the height of the high-rise building 10, the higher the height of the rotating shaft 24, which is advantageous in ensuring the gyroscopic effect of the rotating shaft 24, which will be described later.

The flywheel 26 is provided concentrically with the rotating shaft 24 so as to be rotatable integrally with the rotating shaft 24 , and is positioned at an intermediate portion of the rotating shaft 24 in the longitudinal direction in the present embodiment.
The flywheel 26 is formed in a disc shape from a metal material.
Iron, aluminum, lead, etc. can be used as such a metal material.
Also, the weight of the flywheel 26 can be determined by multiplying the total weight of the high-rise building 10 (building) by a predetermined coefficient.
In this case, the weight of the flywheel 26 increases as the weight of the high-rise building 10 increases, which is advantageous in ensuring the gyroscopic effect of the flywheel 26 and the rotating shaft 24, which will be described later.

The spin motor 28 gives rotational force to the flywheel 26 .
In this embodiment, the output shaft of the spin motor 28 is connected to a power transmission mechanism 42 including a speed increasing mechanism such as a gear train for increasing the speed of rotation of the spin motor 28, and the flywheel 26 spins through the power transmission mechanism 42. Rotation driving force of the motor 28 is transmitted and rotated.
Note that the rotational driving force of the spin motor 28 may be transmitted to the flywheel 26 or may be transmitted to the rotating shaft 24 .
Alternatively, the output shaft of the spin motor 28 may be directly connected to the rotary shaft 24 without the power transmission mechanism 42, which is advantageous in terms of simplifying the configuration.

The earthquake detection unit 30 detects the occurrence of an earthquake in the ground G on which the high-rise building 10 is installed.
In this embodiment, the earthquake detection unit 30 is installed on the ground G in the vicinity of the base of the high-rise building 10, detects the P wave of the first arriving seismic wave using an acceleration sensor, and detects the P wave based on the P wave. to detect the occurrence of an earthquake.
Alternatively, the earthquake detection unit 30 receives earthquake warning information from an earthquake warning system that transmits earthquake warning information via the Internet or a communication network, and detects the occurrence of an earthquake based on this warning information. may In this way, even if the epicenter is away from the high-rise building 10, it is possible to receive the warning information of the occurrence of an earthquake earlier, and the rotation of the flywheel 26 by the rotation control unit 36 described later can be started earlier. It is advantageous in doing so.
In this embodiment, when the earthquake detection unit 30 detects the occurrence of an earthquake, the earthquake detection unit 30 transmits the detection result to the rotation control unit 36 to be described later via the wireless line 31 .
In the figure, reference numeral 3002 denotes an antenna of the earthquake detection section 30, and reference numeral 3602 denotes an antenna of the rotation control section .
It should be noted that the transmission of the detection result from the earthquake detection unit 30 to the rotation control unit 36 may be performed using a wired line configured by a communication cable instead of the wireless line 31. This eliminates the need for the installation work, which is advantageous in simplifying the installation work.

The wind speed detection unit 32 detects the wind speed of the wind hitting the building and transmits the detection result to the rotation control unit 36 which will be described later. It is

The power supply unit 34 supplies power to the spin motor 28, and is installed on the floor slab 14B in this embodiment.
A commercial power supply, a generator, and a secondary battery can be used as the power supply unit 34, and they may be used in combination.
In this embodiment, a secondary battery 34A that is charged with a commercial power supply is used as the power supply unit 34 .

The rotation control unit 36 includes a computer and a motor drive circuit for the spin motor 28, and functions when the CPU of the computer executes a control program. It is
Upon receiving the detection result of the occurrence of an earthquake from the earthquake detection unit 30, the rotation control unit 36 supplies power from the power supply unit 34 to the spin motor 28 through the motor drive circuit, thereby causing the spin motor 28 to rotate the flywheel 26. rotate.
Further, when the wind speed detected by the wind speed detection unit 32 is equal to or higher than a predetermined value, the rotation control unit 36 supplies power from the power supply unit 34 to the spin motor 28 via the motor drive circuit. , the flywheel 26 is rotated by the spin motor 28 .
When the rotating shaft 24 rotates integrally with the flywheel 26, the rotating shaft 24 maintains a vertically extending posture due to the gyroscopic effect.
That is, the gyroscopic effect of the flywheel 26 and the rotating shaft 24 acts to restore the posture of the high-rise building 10 to its original posture even if the high-rise building 10 is shaken by seismic motion or wind pressure.

According to the present embodiment, when the occurrence of an earthquake is detected, the rotation control unit 36 supplies power from the power supply unit 34 to the spin motor 28 to rotate the flywheel 26 and the rotating shaft 24, so that the flywheel 26 And the gyroscopic effect of the rotating shaft 24 suppresses the shaking of the high-rise building 10, thereby exerting a damping effect.
Therefore, even if the tall building 10 has a tower ratio of 4 or more, rocking vibration can be suppressed, the rising of the high-rise building 10 from the ground G can be suppressed, and damage to the high-rise building 10 can be prevented. is advantageous.

Further, in the present embodiment, a wind speed detection unit 32 is provided to detect the wind speed of the wind hitting the building. Since the flywheel 26 is rotated by the spin motor 28 by supplying electric power from the power supply unit 34 to the spin motor 28, the wind is strong due to a typhoon or the like, and the wind pressure acting on the high-rise building 10 increases, and the high-rise building 10 increases. When the building 10 shakes, the gyroscopic effect of the flywheel 26 and the rotating shaft 24 exerts a damping effect, which is advantageous in preventing damage to the high-rise building 10 .
Further, in the present embodiment, since the secondary battery 34A is used as the power supply unit 34, the vibration damping device 22A can be operated even if a commercial power failure occurs. A damping effect can be exhibited regardless of the operating conditions.

(Second embodiment)
Next, a second embodiment will be described.
2nd Embodiment demonstrates the case where the damping apparatus of this invention is applied to a steel tower.
In the following embodiment, the same parts and members as those of the first embodiment are given the same reference numerals as those of the first embodiment, and the explanation thereof is omitted, and the explanation is focused on the different parts. do.
As shown in FIG. 3, the steel tower 16 is a tower-like building having a tower aspect ratio of 4 or more, and supports, for example, a power transmission line or an antenna for transmitting and receiving broadcasting radio waves and communication radio waves. is.
Since such a steel tower 16 has an elongated structure, it is likely to experience a large sway when subjected to strong winds from a typhoon or the force of seismic motion, causing the entire building to float (rocking vibration). Cheap.
The steel tower 16 includes four main pillars 18 extending in the vertical direction, horizontal members 20 extending horizontally and connecting adjacent main pillars 18, and extending in a direction inclined with respect to the horizontal direction. It is configured including a diagonal member (not shown) that connects between the main pillar members 18 that are present and adjacent to each other.
The base of each main pillar material 18 is embedded in foundation concrete 19 placed in the ground G, and each main pillar material 18 is inclined so that the upper sides thereof are close to each other, and when viewed from above, each main pillar is The base of the material 18 is located at the four corners of the rectangle.
In the present embodiment, a rectangular ceiling plate 21A having the same shape as the contours of the four first horizontal members 2002 is attached to the four first horizontal members 2002 positioned at the uppermost portion. Rectangular floorboards 21B having the same shape as the contours of the four second horizontal members 2004 are attached to the four second horizontal members 2004 adjacent to each other. It extends on the horizontal plane.
The power supply unit 34 and the rotation control unit 36 are installed on the floor board 21B, and the wind speed detection unit 32 is attached to the main pillar material 18 at the top of the steel tower 16 .

As shown in FIG. 3, in the vibration damping device 22B of the second embodiment, the generator 46 is provided on the floor plate 21B, and the rotating shaft constituting the input shaft of the generator 46 is vertically upward from the generator 46. A shaft 48 protrudes.
The upper end of the rotating shaft 48 is rotatably supported by an upper bearing portion 38 provided on the ceiling plate 21A.
Therefore, the rotating shaft 48 is rotatably supported by the steel tower 16 via the upper bearing portion 38 and the generator 46 .
A plurality of blade bodies 44 are attached to the upper portion of the rotating shaft 48 at intervals in the circumferential direction of the rotating shaft 48, and the blade bodies 44 receive wind to rotate the rotating shaft 48, thereby generating power. A generator 46 is configured to generate electricity.
As shown in FIG. 4, the electric power generated by the generator 46 is supplied to the secondary battery 34A via the charging device 50 to charge the secondary battery 34A.

In the second embodiment, when the earthquake detection unit 30 detects the occurrence of an earthquake, the rotation control unit 36 supplies power from the power supply unit 34 to the spin motor 28 as in the first embodiment. Since the flywheel 26 is rotated by the spin motor 28, the gyroscopic effect of the flywheel 26 and the rotating shaft 48 exerts a damping effect, which is advantageous in preventing damage to the steel tower 16 due to an earthquake.
In addition, in the second embodiment, when the wind hits the blade body 44 and rotates the rotating shaft 48, the generator 46 generates power, and the power generation charges the secondary battery 34A. The cost of charging is reduced, which is advantageous in terms of energy saving.
Further, in the second embodiment, power is supplied to the spin motor 28 when a strong wind such as a typhoon blows and the wind speed detected by the wind speed detection unit 32 is equal to or higher than a predetermined value. In addition to rotating the flywheel 26 by the spin motor 28, the wind rotates the rotating shaft 48 by the blade body 44, so that the rotating shaft 48 rotates at a higher speed, and the gyro by the flywheel 26 and the rotating shaft 48. Since the effect is accelerated, the damping effect is exhibited more strongly, which is more advantageous in preventing damage to the steel tower 16 .

In the embodiment, the case where the building provided with the damping device is the high-rise building 10 and the steel tower 16, which are tower-like buildings having a tower ratio of 4 or more, was described, but the building provided with the damping device It is not limited to tower buildings.
Moreover, when the tower-like building is the steel tower 16, it is possible to effectively suppress shaking and rocking vibration of the steel tower 16 due to seismic motion and typhoon, which is advantageous in preventing damage to the steel tower 16.
Further, in the embodiment, a case where one damping device is provided in one building has been described, but a plurality of damping devices may be provided at intervals in the vertical direction of the building. Since each damping device 22 produces a gyroscopic effect by the flywheel 26 and the rotary shaft 48, the damping effect is exhibited more strongly, which is more advantageous in preventing damage to the building.
Further, in the embodiment, the case where the steel tower 16 is provided on the ground G has been described, but there is also a tower-like building in which the steel tower is provided on a structure such as a building. The vibration damping device of the present invention can also be applied to , effectively suppressing shaking and rocking vibration of the steel tower 16 due to seismic motions and typhoons, and is of course advantageous in preventing damage to the steel tower 16.

10 High-rise buildings (buildings, tower-like buildings)
16 Steel tower (building, tower-like building)
22A, 22B damping devices 24, 48 rotary shaft 26 flywheel 28 spin motor 30 earthquake detection unit 32 wind speed detection unit 34 power supply unit 34A secondary battery 36 rotation control unit 44 blade body 46 generator 48 rotary shaft

Claims (5)

A damping device for a building,
a rotating shaft extending vertically and rotatably supported by the building;
a flywheel provided concentrically with the rotating shaft and rotatable integrally with the rotating shaft;
a spin motor that imparts rotational force to the flywheel;
an earthquake detection unit that detects the occurrence of an earthquake;
a power supply unit that supplies power to the spin motor;
a rotation control unit that rotates the flywheel by the spin motor by supplying power from the power supply unit to the spin motor when the earthquake detection unit detects the occurrence of an earthquake;
a blade body that is attached to the rotating shaft and rotates the rotating shaft by receiving wind;
a generator that generates power by rotating the rotating shaft,
The power supply unit includes a secondary battery that is charged with power generated by the generator,
A damping device for a building characterized by : A wind speed detection unit that detects the wind speed of the wind hitting the building ,
The rotation control unit causes the spin motor to rotate the flywheel by supplying power to the spin motor when the wind speed detected by the wind speed detection unit is equal to or higher than a predetermined value.
The damping device for a building according to claim 1, characterized in that: The building is a tower building with a tower ratio of 4 or more,
3. A vibration damping device for a building according to claim 1 or 2 , characterized in that: The tower-like building is a steel tower,
4. The damping device for a building according to claim 3 , characterized in that: A plurality of the vibration damping devices are provided at intervals in the vertical direction of the building,
5. A damping device for a building according to claim 1, characterized in that:

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