JPH0440513B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides an architectural structure for suppressing the vibration of an architectural structure such as a building or the vibration of a floor caused by an earthquake or the like. Regarding vibration control structure.

<Conventional technology> Conventionally, as vibration control structures for architectural structures,
A water tank is installed on top of the building structure, and a wave generator is attached to make the water stored there ripple in a specific direction and at a specific frequency.When an earthquake occurs, the direction and frequency of the seismic waves can be immediately analyzed. However, even at the analyzed period, the wave generator was activated to generate waves in the direction that canceled out the seismic waves, thereby suppressing the shaking of the building structure due to the earthquake.

<Problem to be solved by the invention> However, according to such a conventional configuration,
In order to install a large-capacity aquarium in a building structure, it is not only costly to install the aquarium, but also
In order to support the load of the water tank, the strength of the building structure had to be increased, which had the disadvantage of increasing the initial cost.

The present invention has been made in view of the above circumstances, and is designed to prevent vibrations caused by an earthquake, etc., from propagating to a building structure, causing the building structure to vibrate or the floor to vibrate. The purpose of this invention is to make it possible to effectively suppress these problems at low cost.

<Means for Solving the Problems> In order to achieve such an objective, the vibration control structure for an architectural structure of the present invention is such that a part of the wall or floor of the structure is horizontally moved relative to the structure. between the movable wall or movable floor and the structure,
A vibration sensor is provided to detect the behavior of the structure by interposing a drive mechanism that allows relative displacement within a set range between the two, and based on the behavior detected by the vibration sensor, the movable wall or movable floor is moved from the structure. The drive mechanism is configured to include a control device that operates the drive mechanism to move toward and away from the drive mechanism.

<Operation> According to the above configuration, when vibrations propagate to the building structure due to an earthquake and the building structure is displaced in the horizontal direction, the control device operates the drive mechanism to move the movable wall or movable floor. The resulting reaction force acts in a direction opposite to the direction of the structure displacement, making it possible to suppress the behavior of the structure during an earthquake.

In addition, in order to suppress the displacement of the movable floor caused by the displacement of the structure, force is applied in the opposite direction to the displacement of the movable floor to maintain the movable floor in a stationary state regardless of the displacement of the structure. It is also possible to efficiently control vibrations in architectural structures or movable floors depending on the purpose of the building.

<Example> Next, an example of the present invention will be described in detail based on the drawings.

<First Embodiment> FIG. 1 is a schematic overall vertical cross-sectional view showing a first embodiment of a vibration control structure for a building structure according to the present invention, and FIG. It is an enlarged view of a partial notch.
Almost the entire floor portion 1 of the top floor and a predetermined intermediate floor of the structure A is connected to the ceiling wall 2 by a rod 3.
A superconducting magnet 4 is attached to a predetermined location on the horizontal outer peripheral end surface of the movable floor 1, which is suspended and supported so as to be horizontally displaceable via...
Permanent magnets 6 are attached to the wall portion 5 of the structure A facing the horizontal outer peripheral end surface of the movable floor 1 in correspondence with the superconducting magnets 4.

Each of the superconducting magnets 4 is connected to a helium tank via a support column 8 at four locations in the circumferential direction within the vacuum chamber 7, as shown in the enlarged cross-sectional view of the main part in FIG. 3 and the cross-sectional view in FIG. 9 are provided, and a superconducting coil 10 is housed inside each helium tank 9.

A gas discharge pipe 11 is connected in communication with the helium tank 9, and the end of the gas discharge pipe 11 is led out of the vacuum tank 7, and a safety valve 12 is provided therein which opens at a pressure higher than a set value. The helium tank 9 is configured to release helium gas when the pressure inside the helium tank 9 exceeds a set value as the liquid helium vaporizes.

The vacuum chamber 7 is formed into an annular shape by an inner cylinder 7a and an outer cylinder 7b, and the permanent magnet 6 is fitted into the inner cylinder 7a so as to be relatively displaceable.

As shown in the circuit diagram of FIG. 5, the superconducting coil 10 includes a persistent current switch 1 equipped with a heater 13.
4 and connected to a power source 15 in parallel.

Then, close the first switch 16 and turn on the heater 1.
3 heats the persistent current switch 14 to bring it into a normal conductive state so that the persistent current switch 14 has resistance. In this state, the second switch 17 is closed, and the power source 15 causes an exciting current to flow through the superconducting coil 10.
In this way, after the excitation current flows, the first switch 16 is opened to stop heating by the heater 13, and the persistent current switch 14 is turned off by cooling.
After making the superconducting state, the second switch 17 is opened to cut off the connection with the power source 15, thereby forming a closed loop between the persistent current switch 14 and the superconducting coil 10, and permanently keeping the resistance at zero. It is configured so that current continues to flow through the superconducting coil 10 and a predetermined magnetic force continues to be generated. In the figure, 18 indicates the first and second switches 16 and 17 mentioned above.
The control device for turning ON and OFF is shown.

A vibration sensor 19 that detects the vibration of the structure A and its direction is provided at a predetermined location on the upper floor of the structure A, and the detection result by the vibration sensor 19 is input to the control device 18, which detects the input vibration. Select the superconducting magnet 4 to act on based on the strength and direction, and
The ON time and OFF time for each of the first and second switches 16 and 17 are calculated, and each of the first and second switches 16 and 17 is turned on and off to correspond to the calculated time, and the superconducting coil is turned on and off. 10, it is configured to drive and displace the movable floor 1 to a state where the vibration of the structure A is canceled by generating magnetic force at a predetermined period.

In other words, when vibrations are propagated to the structure A due to an earthquake, etc., and the structure A vibrates and attempts to move horizontally, the permanent magnet 6 and the superconducting magnet may be damaged in a certain part of the movable floor 1. By applying an attractive force or a repulsive force between the structure A and the structure A, the reaction force received by the structure A is applied in the opposite direction of the movement of the structure A, thereby actively reducing vibrations of the structure A. do.

In the above embodiment, the superconducting coil 10 is stored in the helium tank 9 and cooled, but the superconducting coil 10
Depending on the material of the wire making up the wire, the wire may be stored in a cryostat using liquid nitrogen.

<Second Embodiment> FIG. 6 shows an overall vertical cross-sectional view of a second embodiment of the vibration control structure for a building structure of the present invention, in which almost the entire floor portion 1 of the top floor and a predetermined intermediate floor is , is suspended and supported from the ceiling wall 2 via rods 3 so as to be displaceable in a horizontal two-dimensional direction, and at a predetermined location on the horizontal outer peripheral end surface side of the movable floor 1;
A first
And second linear motors 20a, 20b are interposed.

As shown in the enlarged sectional view of the main part in FIG. 7, the first linear motor 20a is provided with a first coil 21a on the movable floor 1 side.
A first permanent magnet 22a is provided therein so as to be movable in the horizontal direction.

As shown in the enlarged sectional view of the main part in FIG. 8, the second linear motor 20b is provided with a second coil 21b on the wall portion 5 side.
A second permanent magnet 22b is provided therein so as to be movable in a horizontal direction orthogonal to the moving direction of the first permanent magnet 22a.

A locking pin 23 is attached to the end of the wall portion 5 of the first permanent magnet 22a, and a pair of brackets 24, 24 are attached to the second permanent magnet 22b facing each other. An elongated hole 25 is formed in each of them, and the locking pin 23 is engaged across both elongated holes 25,25.

The movable floor 1 of the structure A is provided with a vibration sensor 19a that detects its own behavior, and a control device 18a is connected to the vibration sensor 19a. Thereby, based on the signal from the vibration sensor 19a, the first coil 21a or the second coil 2 is configured to apply force in the direction opposite to the displacement of the movable floor 1.
1b, a current of a predetermined strength is passed through the first and second
The linear motors 20a, 20b are operated to maintain the movable floor stationary regardless of the displacement of the structure A.

<Third Embodiment> Although not shown, a vibration damping electromagnet is used instead of the permanent magnet in the first embodiment, and a superconducting magnet is provided on the movable floor 1 side so as to face the electromagnet. In the magnet, a predetermined magnetic force is always generated in a superconducting state, and only in the vibration damping electromagnet, the polarity and the strength of the flowing current are detected by a vibration sensor. Based on the behavior of the controller, the controller is configured to control the controller as in the previous embodiment.

Superconducting magnet 4 in the first embodiment described above
and a permanent magnet 6, a configuration consisting of the first and second linear motors 20a and 20b in the second embodiment, and a configuration consisting of a damping electromagnet and a superconducting magnet in the third embodiment. It is called.

In the above embodiment, the predetermined floor 1, which is a part of the structure A, is configured to be movable. It may be constructed such that it can be displaced.

Moreover, the structure is not limited to the floors 1, 1 of the two floors between the top floor and the middle floor, but the floors 1 of three or more floors may be configured to be displaceable.

Further, in the above embodiment, the movable floor 1 is used as a damping load to apply a control force to suppress the displacement of the entire building structure from its resting state due to vibrations, but the present invention as,
Regardless of the displacement of the structure A, the control force may be applied so that only the movable floor 1 remains stationary.

<Effects of the Invention> According to the vibration control structure for a building structure of the present invention, the movable wall or movable floor, which is a part of the building structure, is moved closer to and away from the structure, thereby reducing the vibration of the building structure or the movable floor. Since it suppresses vibrations, it is possible to eliminate the need for large-scale structures for vibration control, such as conventional vibration control structures using water tanks, and it is possible to increase the strength of the structure to support the structure. It has become possible to construct architectural structures at low cost without having to do a lot of work, and it has become possible to reduce the initial cost and suppress vibrations in architectural structures and movable floors.

In addition, a drive mechanism is attached to the control device to move the movable wall or movable floor, and the weight of the movable wall or movable floor is used to suppress fluctuations in the center of gravity of the entire building structure. It has become possible to suppress vibrations even better.

Also, when maintaining a movable floor in a stationary state,
For example, by installing devices that are prone to failure due to vibrations, such as computers and other office automation equipment and various measuring instruments, on a movable floor, failures caused by vibrations can be avoided, which has a great practical effect.

In addition, when using a superconducting magnet as a drive mechanism, if an excitation current is passed through the superconducting magnet, the current can be passed permanently and a large magnetic force can be generated without causing loss due to resistance. It has the advantage of being able to significantly reduce power consumption compared to the case of driving, reducing both initial cost and running cost, and suppressing vibrations of building structures and movable floors.

[Brief explanation of drawings]

The drawings show an embodiment of the damping structure for a building structure according to the present invention, FIG. 1 is a schematic overall vertical sectional view showing the damping structure for a building structure according to the first embodiment, and FIG. A partially cutaway enlarged view of the main part of Figure 1, Figure 3 is
Fig. 2 is an enlarged sectional view of the main part, Fig. 4 is a - line sectional view of Fig. 3, Fig. 5 is a circuit diagram, and Fig. 6 shows the damping structure of the building structure of the second embodiment. 7 is a partially cutaway enlarged view of the main part of FIG. 6, and FIG. 8 is a partially cutaway view taken along the line - in FIG. 7. DESCRIPTION OF SYMBOLS 1... Movable floor, 4... Superconducting magnet forming a drive mechanism, 6... Permanent magnet forming a drive mechanism, 18, 18a... Control device, 19, 19a...
...Vibration sensor, 20a...First as a drive mechanism
Linear motor, 20b...Second as a drive mechanism
Linear motor, A...Structure.

Claims (1)

[Claims] 1. A part of the wall or floor of the structure is provided so as to be freely displaceable in the horizontal direction with respect to the structure, and there is a space between the movable wall or movable floor and the structure within the set range of both. A vibration sensor is provided to detect the behavior of the structure, and a vibration sensor is provided to detect the behavior of the structure.
A vibration damping structure for a building structure, comprising a control device that operates the drive mechanism to move the movable wall or the movable floor toward and away from the structure based on behavior detected by the vibration sensor. . 2. The vibration damping structure for a building structure according to claim 1, wherein the drive mechanism is a linear motor. 3. The drive mechanism includes a vibration damping electromagnet provided on either the movable wall or the movable floor and the structure;
A vibration damping structure for a building structure according to claim 1, further comprising a superconducting magnet provided on the other side.