JP3135172B2 - Building damping device - Google Patents

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 for a building, and more particularly to a hybrid vibration damping device.

[0002]

2. Description of the Related Art Conventionally, in a building such as a building, a vibration damping device is provided on a roof of the building in order to suppress vibration when vibration occurs due to an earthquake or wind pressure. As a system for damping the roof of such a building, there is the following system.

(1) Active method As shown in FIG. 6A, an additional mass body 53 having a predetermined weight corresponding to the mass of the building 51 is provided on the roof 52 of the building 51.
The vibration is damped by positively displacing the vibration according to the vibration state of the building 51, and the vibration damping performance is good but the system becomes expensive.

(2) Passive method This method does not actively work on building input. As shown in FIG. 6B, passive damping means including a water damper 54 and the like are provided, and Although the vibration of the building 51 is absorbed by the vibration of the water of the damper or the like, tuning (fine adjustment) is required, and only one vibration mode is targeted.

(3) Hybrid (hybrid) system This system uses both the passive system and the active system.
As shown in FIG. 7C and FIG. 7, a method in which a main additional mass body 55 of a passive type TMD (Tuned Mass Damper) is actively driven by an actuator 56 having a part 51a of the building 51 as a reaction force. It is.

[0006]

However, the conventional hybrid system (FIG. 6 (c)) is a system in which a reaction force is applied to the building 52.
The high-frequency vibrations generated from the motor and others are easily transmitted as solid-borne noise. Therefore, there is a problem that it has a bad influence on the livability of the building from the aspect of sound.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a vibration-suppressing effect that is not different from that of a conventional hybrid vibration-suppression device, and to achieve solid-state transmission sound from active vibration-suppression means. It is an object of the present invention to provide a vibration damping device for a building, which is capable of minimizing the amount of vibration.

[0008]

In order to solve the above-mentioned problems, a vibration damping device for a building according to the present invention comprises a primary vibration mode for a building having a structure in which a main additional mass body is supported by an isolator on the roof of the building. A passive additional mass body, tuned to, is mounted on the main additional mass body, and the driven additional mass body movably supported via a bearing and the driven additional mass body constituting active vibration suppression means. A driving device for moving the driven additional mass body, a reaction point of the driving device for moving the driven additional mass body is set to the main additional mass body, and a damping effect of the active vibration damping means on a primary vibration mode of the building by the passive vibration control means. It is configured to amplify by a vibration means (claim 1). In this case, the main additional mass may be a concrete mass, and the isolator may be a laminated rubber.

In the present invention, a concrete mass is supported on a roof of a building by a plurality of laminated rubbers, and the concrete mass and the roof are connected to each other by a damper so as to tune to a primary vibration mode of the building. The passive mass damping means is installed, and it is movably supported on the concrete mass via bearings that constitute the active mass damping means.
The driven additional mass body and the driving device for moving the driven additional mass body are installed, and the reaction point of the driving device for moving the driven additional mass body is set to the main additional mass body, and the active vibration damping means is used. It is preferable that the passive vibration damping means amplify the damping effect on the primary vibration mode of the building (claim 3).

[0010]

According to the first to third aspects of the present invention, a reaction force for moving the main additional mass body is not directly applied to the building, but the driven additional mass body is installed on the main additional mass body to provide the main additional mass body. The reaction force for moving the body uses the inertial force of the driven additional mass body generated by moving the driven additional mass body. The inertial force generated by the driven additional mass body is a main additional force configured as a passive TMD in which the inertial force corresponding to the primary vibration mode of the building is set in synchronization with the primary vibration mode of the building. It is amplified by the mass and transmitted to the building as a damping force. This vibration damping effect is equivalent to or higher than that of the conventional FIG. 6 (c). Also, through the bearing on the main additional mass
With a driven additional mass supported movably,
Movement of the driven additional mass body generated from the active vibration damping means in which the driven additional mass body is moved by the driving device.
High-frequency vibrations such as mechanical sliding sound associated with is, is inherently path
Separate vibration isolators are provided by elastic means such as springs that constitute an isolator installed for passive vibration suppression.
It is cut off reasonably and conveniently without need, and no building-borne sound is transmitted to the building. Therefore, the amount of solid-borne sound is small,
Comfortability is improved.

According to the third aspect of the present invention, a passive type TMD is formed from the concrete mass, the multi-layered rubber, and the damper.
Is configured. When a damper is provided in the passive vibration damping means, the behavior of the driving device corresponding to the high-frequency component can be cut by the damper, and the adverse effect of the operation delay of the driving device can be eliminated. Further, the oscillation of the control system is suppressed by this damper, and stabilization is achieved. Of course, depending on the configuration, active damping means
Mechanical sliding caused by the movement of the driven additional mass
High-frequency vibrations such as dynamic sounds are also blocked, and
Is not transmitted.

Further, the passive vibration damping means according to the first to third aspects of the present invention includes a main additional mass and an isolator, or
Since it is configured as a passive TMD by combining a concrete mass, laminated rubber, and a damper,
It is possible to efficiently control the primary vibration mode.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vibration damping device for a building according to the present invention. In FIG. 1, reference numeral 1 denotes a vibration damping device installed on a roof 2 a of a building 2,
It is composed of passive vibration damping means P tuned to the dynamic mode and active vibration damping means A mounted thereon, and is of a hybrid type. The former passive damping means P is shown in FIG.
As shown in the figure, the main additional mass body 3 is supported by the isolator 4, and the latter active vibration damping means A
Is a driving device 6 that directly installs the driven additional mass 5 on the main additional mass 3 and moves the driven additional mass 5
Of the main additional mass 3 described above. Therefore, when viewed from the passive vibration damping means P, unlike the related art, the reaction point for moving the main additional mass body 3 is not set in the building, and the reaction force for moving the main additional mass body 3 is not affected. The configuration is based on the inertial force of the driven additional mass body 5 generated by moving the driving additional mass body 5.

The number of the active vibration damping means A is one when the vibration direction to be damped is one direction, and one for each direction when the vibration direction to be damped is two directions taking into account the direction orthogonal to this direction. 2 in total), and the building response in one or two directions is controlled by a known hybrid method. In the case of this embodiment, the number of the active vibration suppression means A is one,
The building 2 is installed so as to suppress vibration in the short side (arrow X) direction. Therefore, it is a one-way hybrid in the direction of the arrow X and is one-way passive in the direction of inertia of the main additional mass body 3.

3 and 4 show a specific configuration of the vibration damping device 1. FIG. As shown, the passive vibration damping means P includes a concrete mass body 30 as a main additional mass body 3 and an isolator 4 supporting the concrete mass body 30 at a plurality of locations.
, And a damper 41 connecting the main additional mass body 3 and the roof of the building, and the whole is configured as a passive TMD. Considering the weight of the main additional mass body 3 and the driven additional mass body 5 etc., the spring rigidity of the multi-layer laminated rubber 40 is such that the natural frequency of the passive vibration damping system substantially matches the natural frequency of the primary vibration mode of the building. Is determined on the assumption that On the other hand, the damper 41 is a variable damping force type damper. That is, the damping force is normally set so as to obtain the optimum damping force in the passive vibration damping system. However, when the deformation of the multi-layer laminated rubber 40 becomes excessive, the damping force is automatically switched, and is reduced by one digit compared to the optimum damping force. The system has a large damping force and is used for braking.

On the upper surface of the concrete mass 30, a rectangular recess 31 is formed, in which the lower part of the active damping means A is housed. On the other hand, the active vibration damping means A has a main body 11 fixed in a recess 31 on the upper surface of the concrete mass body 30 by a bolt 12. 11a
Denotes an upper surface of the main body, and 11b denotes a fixing portion. The driven additional mass body 5 of the active vibration damping means A has a T-shaped cross section, the lower part of which is inserted into a groove-shaped recess 13 provided in the main body 11, and the arms on both sides are groove-shaped. The linear bearing 14 extends so as to face the upper surface of the peripheral edge of the concave portion 13.
And is movable along the groove-shaped recess 13.

As shown in FIG. 5, in order to move the driven additional mass body 5, the driven additional mass body 5 has a ball screw mechanism 1 attached thereto.
5 are provided, and both ends of a male screw 16 screwed into the screw 5 are supported by a first bearing portion 18 and a second bearing portion 19 provided on the main body upper surface 11a. An AC servomotor 20 as a driving device 6 is provided on the upper surface 11a of the main body, and its output shaft 21 is coupled to a male screw 16 via a coupling 17 and its rotational driving force is applied to a ball screw mechanism 15.
The driven additional mass 5 can be slid in the direction of the arrow X in FIG. The bearing 1
Reference numerals 8 and 19 each include an angular contact ball bearing (not shown) and a stopper for holding the same, and have a structure capable of withstanding not only a load in the radial direction but also a load in the thrust direction (X direction). This takes into account the reaction when the driven additional mass body 5 is moved. The other end of the output shaft 21 of the AC servomotor 20 is connected to the upper surface 11.
a when the power supply is cut off during a power failure or the like, the output shaft 21 is automatically connected to the electromagnetic brake mechanism 22 fixed to the output shaft 21.
Is configured to be braked.

As shown in FIG. 1, the vibration damping device 1 configured as described above includes a vibration state detection sensor 7 provided on a floor, a pillar, or the like of a required floor of a building 2, and an earthquake sensor provided under the building 2. 8,
Together with the wind anemometer 9 provided on the roof of the building 2 and the control system 10 of the active vibration control means A, a vibration control system is constituted as a whole.

When the building 2 vibrates in the direction of the arrow X due to the occurrence of an earthquake or wind pressure, different vibrations at each floor of the building are detected by the respective vibration state detecting sensors 7 and the control system together with the detection signal from the earthquake sensor 8. 10 is input.
In the control system 10, this is digitized by the A / D converter 27, input to the arithmetic unit 28, and based on the signal from the wind speed anemometer 9, the displacement of the driven additional mass body 5 in accordance with a predetermined program. Calculate direction, displacement, speed, acceleration, etc. Then, the servo controller 29 connected to the arithmetic unit 28 controls the A
A drive current is supplied to the C servo motor 20. The AC servomotor 20 which is always in the standby state with a weak current supplied thereto, rotates the male screw 16 simultaneously with the supply of the drive current. This rotational force is transmitted to the ball screw mechanism 15 and converted into a displacement of the driven additional mass 5, and the driven additional mass 5 slides on the concrete mass 30 with good responsiveness, for example, in the direction of arrow X1 in FIG. Move.

Here, the driven additional mass body 5 is directly installed on the main additional mass body 3 and its reaction point is located in a part of the main additional mass body 3. Arrow X on the concrete mass 30 which is the mass 3
When the driven additional mass body 5 moves in one direction, a reaction force for moving the main additional mass body 3 is generated in the arrow X2 direction as the inertial force of the driven additional mass body 5, as shown in FIG. Inertial force generated by the driven additional mass body 5, in particular building 2 of them
The inertia force corresponding to the primary vibration mode of
Amplified by the main additional mass body 3 constituting the passive type TMD set in synchronization with the vibration mode, transmitted to the building 2 as a vibration damping force, and generated in the building 2 ,
In particular, the vibration of the primary mode with large swing is damped.

This vibration damping effect is the same as that shown in FIG.
(C) It becomes equal to or more than the type, and appears as a function of minimizing the solid-borne sound generated from the active vibration damping means A. Because, active vibration suppression means A
The high frequency vibration generated from the motor etc. is passive type TM
This is because it is possible to transmit to the building only through the concrete mass 30, which is the main additional mass 3, which constitutes D, and the multi-layer laminated rubber 40, which is the isolator 4, and it is not transmitted directly to the building 2 as in the conventional case. .

Further, the AC servo motor 2 as the driving device 8
0, when responding via the servo controller 29 in response to a command from the arithmetic unit 28, causes an extreme operation delay with respect to the high-frequency component in the input control signal, and acts in a direction to amplify the swing of the building. Sometimes. But,
When the damper 41 is provided in the passive vibration damping means P,
The behavior of the driving device 8 corresponding to the high frequency component is determined by the damper 41.
In addition to this, it is possible to eliminate the adverse effect on the operation delay of the driving device 8 as well. Also,
The damper 41 also functions to suppress the oscillation of the control system and stabilize it.

Further, the passive vibration damping means P of the above embodiment is
The concrete mass body 30 is supported by a plurality of multi-layer laminated rubbers 40, and furthermore, a damper 41 is connected to form a passive type TMD.
It is possible to efficiently control the primary vibration mode.

[0024]

In summary, according to the present invention, the following excellent effects can be obtained. 1) According to Claims 1 to 3 , a bare
Driven additional mass supported movably via a ring
The driven mass is moved by a driving device.
The driven device generated from the active damping means
High-frequency vibrations such as mechanical sliding noise caused by the movement of the weighted body are originally caused by an isolator installed for the purpose of passive vibration suppression, or by a combination of laminated rubber or laminated rubber and a damper. Vibration isolation by passive TMD consisting of
It is cut off rationally and conveniently without the need to provide any equipment, and no solid-borne sound is transmitted to the building. Therefore, the livability of the building is improved. 2) According to the first to third aspects of the present invention, the inertial force generated by the driven additional mass body includes an inertial force corresponding to the primary vibration mode of the building, particularly, the inertial force corresponding to the primary vibration mode of the building. Since it is amplified by the main additional mass body configured as a passive TMD set in synchronization and transmitted to the building as the vibration damping force of its primary vibration mode, it is equivalent to or equal to the conventional hybrid vibration damping device. The above damping effect can be obtained. 3) The passive vibration damping means P according to any one of claims 1 to 3
Is composed of a passive additional TMD combining a main additional mass and an isolator, or a concrete mass and a laminated rubber, and furthermore, a damper, so that the primary vibration mode can be efficiently controlled. is there. 4) In particular, according to the configuration of the third aspect, the behavior of the driving device corresponding to the high-frequency component is cut by the damper, so that the operation delay of the driving device can be prevented from being adversely affected and the oscillation of the control system is suppressed. And stabilization can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment in which a building vibration damping device of the present invention is applied to a building.

FIG. 2 is a conceptual diagram showing a building damping device of the present invention.

FIG. 3 is a partial cross-sectional front view showing one embodiment of the building vibration damping device of the present invention.

FIG. 4 is a top view showing one embodiment of the building vibration damping device of the present invention.

FIG. 5 is a side view of an active vibration damping unit in the vibration damping device of FIG.

FIG. 6 is a conceptual diagram showing a configuration example of a conventional vibration damping device.

FIG. 7 is an enlarged explanatory view of the conventional vibration damping device of the hybrid type shown in FIG. 6 (c).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration control device 2 Building 2a Rooftop 3 Main additional mass body 4 Isolator 5 Driven additional mass body 6 Drive device 7 Vibration state detection sensor 8 Earthquake sensor 9 Wind speed anemometer 10 Control system 11 Main body 15 Ball screw mechanism 20 AC servo motor (drive) 21) Output shaft 22 Electromagnetic brake mechanism 27 A / D converter 28 Arithmetic unit 29 Servo controller 30 Concrete mass 40 Multi-layer laminated rubber 41 Damper P Passive vibration damping means A Active vibration damping means

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-156171 (JP, A) JP-A-4-69428 (JP, A)

Claims (3)

(57) [Claims] 1. A passive vibration damping means tuned to a primary vibration mode of a building having a structure in which a main additional mass body is supported by an isolator is installed on a roof of a building, and an active mass is provided on the main additional mass body. A driven additional mass body movably supported via a bearing and a driving device for moving the driven additional mass body, which constitutes a vibration damping means, are installed. A vibration damping device for a building, wherein a force point is taken to the main additional mass body, and the passive vibration damping means amplifies a damping effect of the active vibration damping means on a primary vibration mode of the building. 2. The vibration damping device for a building according to claim 1, wherein the main additional mass body is a concrete mass body, and the isolator is a laminated rubber. 3. A passive system tuned to a primary vibration mode of a building, comprising a concrete mass supported on a roof of a building by a plurality of laminated rubbers and a connection between the concrete mass and the roof by a damper. On the concrete mass body, a driven additional mass body movably supported via bearings and a driving device for moving the driven additional mass body are provided on the concrete mass body. And taking the reaction point of the driving device for moving the driven additional mass body into the main additional mass body, and amplifying the damping effect of the active vibration damping means on the primary vibration mode of the building by the passive vibration damping means. Characteristic building damping device.