JP3670126B2 - Vibrating device for buildings against earthquakes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention makes it easy to experience the seismic performance of buildings and houses by seeing those who plan to build their own buildings or houses, students studying architecture, scholars studying earthquake-resistant buildings, etc. It relates to a visual confirmation device capable of
[0002]
[Prior art]
Conventionally, there has been a device for experiencing the seismic intensity of an earthquake by placing a building on a large vibration mechanism and placing a person in the building to vibrate.
However, it is not a seismic isolation structure, it is not a seismic control structure, but vibrations caused by earthquakes in buildings and houses with normal structures, or a vibration control structure that actively suppresses vibrations by moving the pendulum against the vibration. There was no device for visually confirming the seismic isolation structure that allowed the building and the building itself to move against earthquake shaking.
[0003]
[Problems to be solved by the invention]
The present invention does not actually experience vibration with the body, but the difference in the period of vibration and the movement of the building using the seismic isolation and seismic isolation structure depending on the height of the building can be visually observed with the model building. It is a device that enables confirmation.
[0004]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
A vibration mechanism is housed and disposed inside a vibration mechanism storage box 5 that does not vibrate, and a vibration table 1 that vibrates by the vibration mechanism is supported on the vibration mechanism storage box 5 so as to be able to vibrate. On top of the above, a building model A having a seismic isolation structure that reduces the seismic response by reducing the acceleration response magnification, and a building model D having a seismic control structure that reduces the seismic response by absorbing vibration energy,
A building model B having a general structure with no seismic isolation structure and no damping structure is arranged, a support rod 13 is projected from the vibration mechanism storage box 5, and a horizontal support rod 11 is mounted on the support rod 13. A fixed scale 6 is fixed to the building at the tip of the horizontal support rod 11, and the position of the fixed scale 6 is configured to be movable to the side of each building model and disposed on the shaking table 1. It is possible to visually recognize the vibration generated in the building model .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is an overall bird's-eye view of an apparatus for visually confirming vibration of a building against an earthquake of the present invention, FIG. 2 is a drawing showing the shape of a building model arranged in the apparatus for visually confirming vibration of a building against an earthquake of the present invention, and FIG. 4 is an overhead view showing the arrangement of the building model A and the fixed scale 6 that makes it possible to visually recognize the vibration generated in the building. FIG. 4 shows that the left-right slidable support portion 7 ′ of the seismic isolation structure building model A is constituted by a parallelogram link. FIG. 5 shows a case where the left-right slidable support portion 7 of the base-isolated structure building model A is constituted by a rotating roller.
[0006]
FIG. 6 is a drawing showing a loosely connected state of a building in the case of a seismic control structure in which a pendulum is swung in a direction opposite to that of the vibration to suppress the vibration of the earthquake, and FIG. 7 is a ground surface in the case of a seismic isolation structure and a general structure FIG. 8 shows a state in which the pendulum 9 obtains the maximum vibration control action by adjusting the vibration period of the shaking table 1 in the vibration control structure. Comparison drawing, FIG. 9 is a drawing showing a state in which a large vibration is generated when the period of the vibration of the earthquake coincides with the period of the shaking of the building in the case of a simple structure that is not a seismic isolation structure / damping structure. 10 is a drawing comparing the vibrations of the seismic isolation structure, the damping structure and the general structure, and FIGS. 11 and 12 are drawings showing the structure of the damping structure.
[0007]
FIG. 10 shows a comparison of vibrations in the case of a building seismic isolation structure, a vibration control structure, and a general structure.
The seismic isolation structure reduces the earthquake response, and the method is performed by lowering the acceleration response magnification. As a method of reducing the acceleration response magnification, a structure in which a soft member is introduced in the horizontal direction at the base of a relatively rigid building is used.
The damping structure reduces the seismic response, and the method is a structure that absorbs vibration energy. As a method of absorbing this vibration energy, a movable mass such as a pendulum 9 is installed on the top floor, and the mass moves according to the shaking of the building.
The general structure is a structure that is fixed to the ground with a solid foundation without seismic isolation structure or damping structure, and the energy of the earthquake is absorbed by the building according to the periodic characteristics of the building.
[0008]
In FIG. 11 and FIG. 12, the structure of the damping structure is illustrated.
In the case of FIG. 11, the movable mass 10 is arranged on the top floor, and the movable mass 10 is configured to slide in the direction opposite to the earthquake vibration.
In the configuration of FIG. 12, the movable mass 10 is controlled by the computer 8 so that the movable mass 10 moves in a direction completely opposite to the vibration of the earthquake.
In FIG. 8, it is drawing which shows the effect of a damping structure with the damping structure building model D, and has shown that the pendulum 9 may not fully respond depending on the period of the vibration of an earthquake.
[0009]
Therefore, in the present invention, the vibration period of the vibration table 1 is adjusted by the vibration period adjusting device 2 provided in the part of the building vibration viewing device against an earthquake, and the pendulum 9 is most controlled in any period. It is possible to visually check whether the effect is exhibited.
In the vibration cycle in the case of the right side of FIG. 8, the vibration control effect is not sufficiently exhibited, and the vibration control structure building model D swings with a large amplitude and a different cycle with respect to the vibration of the vibration table 1. .
On the other hand, in the case of the vibration control structure building model D on the right side, the vibration period and the period of the pendulum 9 match, and the vibration control structure building model D has an amplitude of zero.
[0010]
FIG. 6 shows a structure of the damping structure building model D having a damping structure in which the rigid support members constituting the building are given backlash to allow the front end of the damping structure building model D to be allowed to swing. Yes.
The hook 15 can be suspended by replacing the pendulum 9.
FIG. 9 shows a general structural building model E that has no seismic isolation structure or damping structure. In the case of the left side, since the vibration of the earthquake does not coincide with the general structural building model E, there is a large rigid vibration. In the case where it does not occur, the right side shows the case where the vibration period of the earthquake and the vibration period of the general structural building model E coincide with each other to generate a large amplitude vibration. Even so, when the vibration period is adjusted by the vibration period adjusting device 2, it is possible to reproduce the occurrence of a large vibration that would cause the general structural building model E to collapse. This can be visually recognized.
[0011]
FIG. 7 shows a comparison of building vibration in the case of the seismic isolation building model A and the general structure building model B. FIG.
In the vibration monitoring apparatus for buildings against earthquakes according to the present invention, the seismic isolation building model A and the general structure building model B are arranged side by side, and a fixed scale 6 that makes it possible to visually recognize the vibration generated in the building beside the building model A. By building, the operator can confirm the difference in vibration between the base-isolated structure and the general structure.
In FIG. 4, the structure of the left-right slidable support portion 7 in the case of the seismic isolation structure is illustrated. 13 and 14 show a specific configuration of the left / right slidable support portion 7 '.
[0012]
The present invention is capable of visually recognizing the vibration generated in the building and the vibration response to each earthquake, taking into account the existence of the seismic isolation structure, damping structure, and general structure. Is arranged so that the operator can theoretically distinguish and visually recognize through the fixed scale 6.
As shown in FIG. 1, the building vibration visualizing apparatus for an earthquake according to the present invention has a vibration table 1 arranged on a vibration mechanism storage box 5 so as to vibrate.
In addition to the above-described seismic isolation building model A, general structural building model B, seismic control building model D, and general structural building model E, the general structure is generally used. A general structural building model C, a general high-rise building model F, and a general high-rise building model G that are higher than the structural building model B are arranged.
The high general structural building model C can visually recognize that a large vibration is generated in the normal earthquake than the general structural building model B.
[0013]
Further, a support rod 13 protrudes from the portion of the vibration mechanism storage box 5 which is a portion that does not vibrate, and a horizontal support rod 11 protrudes from the support rod 13 and is generated at the tip of the horizontal support rod 11 in the building. The fixed scale 6 which makes it possible to visually recognize the vibration to be fixed is fixed.
The position of the horizontal support rod 11 and the fixed scale 6 that enables the vibration generated in the building to be visually recognized can be moved from the seismic isolation building model A to the side of the seismic control structure high-rise building model G. It is configured so that vibration can be visually recognized.
The vibration mechanism adjusting box 2 provided in the operation control unit 20 adjusts the period of the vibration mechanism in the vibration mechanism storage box 5, and the amplitude adjusting apparatus adjusts the amplitude that is the magnitude of the earthquake. 3. Further, a power switch 4 of the present apparatus is provided.
[0014]
In FIG. 3, a fixed scale 6 is arranged on the side of the seismic isolation building model A so that the vibration generated in the building can be visually recognized, and it is visually confirmed how the seismic isolation building model A does not vibrate. The state is shown.
[0015]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
A vibration mechanism is housed in the vibration mechanism storage box 5 which is a portion that does not vibrate.
A vibration table 1 that vibrates more is supported on the vibration mechanism storage box 5 so as to vibrate. On the vibration table 1, a building having a seismic isolation structure that reduces an earthquake response by lowering an acceleration response magnification. Model A, and building model D with a damping structure that reduces seismic response by absorbing vibration energy,
A building model B having a general structure with no seismic isolation structure and no damping structure is arranged, a support rod 13 is projected from the vibration mechanism storage box 5, and a horizontal support rod 11 is mounted on the support rod 13. A fixed scale 6 is fixed to the building at the tip of the horizontal support rod 11, and the position of the fixed scale 6 is configured to be movable to the side of each building model and disposed on the shaking table 1. Since the vibration generated in the building model can be visually recognized, the fixed scale 6 can be moved so that it can move to the side of the seismic isolation building model A, the general structure building model B, and the damping structure building model D. The state of vibration of each building model can be confirmed visually, and the difference in vibration between the seismic isolation structure, damping structure and general structure can be understood with certainty.
[Brief description of the drawings]
FIG. 1 is an overall overhead view of a device for visually confirming vibration of a building against an earthquake according to the present invention.
FIG. 2 is a view showing the shape of a building model arranged in a building vibration visualizing device against an earthquake according to the present invention.
FIG. 3 is an overhead view showing an arrangement of a seismic isolation building model A and a fixed scale 6 that enables visual recognition of vibrations generated in the building.
FIG. 4 is a drawing when the left-right slidable support portion 7 ′ of the base-isolated building model A is configured by a parallelogram link.
FIG. 5 is a drawing when the left-right slidable support portion 7 of the seismic isolation structure building model A is constituted by a rotating roller.
FIG. 6 is a drawing showing a loosely connected state of a building in the case of a vibration control structure in which a pendulum is swung in a direction opposite to that of the vibration to suppress the vibration of the earthquake.
FIG. 7 is a drawing for comparing the period of ground shaking and the period of building shaking in the case of a base-isolated structure and a general structure.
FIG. 8 is a diagram comparing states in which the pendulum 9 obtains the maximum vibration control action by adjusting the vibration period of the shaking table 1 in the vibration control structure.
FIG. 9 is a diagram showing a state in which a large vibration is generated in the case of a mere general structure that is not a seismic isolation structure or a vibration control structure, when the earthquake vibration and the building vibration period coincide with each other.
FIG. 10 is a drawing comparing shaking in the case of seismic isolation structure, damping structure and general structure.
FIG. 11 is a drawing showing a mechanism of a vibration control structure.
FIG. 12 is also a drawing showing another mechanism of the vibration control structure.
FIG. 13 is a drawing showing a specific configuration of a left-right slidable support portion 7 ′ of a base-isolated building model A.
FIG. 14 is a drawing showing a specific configuration of a left-right slidable support portion 7 ′ of the seismic isolation building model A.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaking table 2 Vibration period adjusting device 3 Amplitude adjusting device 4 Power switch 5 Vibration mechanism storage box 6 Fixed scale which can visually recognize the vibration which generate | occur | produces in a building 7 Left and right slidable support part 9 Pendulum

Claims (1)

A vibration mechanism is housed in a vibration mechanism storage box 5 that is a portion that does not vibrate, and a vibration table 1 that vibrates by the vibration mechanism is supported on the vibration mechanism storage box 5 so as to be capable of vibration.
On the shaking table 1, a building model A having a seismic isolation structure that reduces the seismic response by lowering the acceleration response magnification and a building model D having a vibration control structure that reduces the seismic response by absorbing vibration energy. And a building model B with a general structure that is neither seismically isolated nor controlled,
A support rod 13 is projected from the vibration mechanism storage box 5, a horizontal support rod 11 is projected on the support rod 13, and a fixed scale 6 is fixed to the building at the tip of the horizontal support rod 11, The position of the scale 6 is configured to be movable to the side of each building model so that the vibration generated in the building model placed on the shaking table 1 can be visually recognized. apparatus.

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