JPH0625526Y2 - Earthquake-proof structure of a house - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an earthquake-proof structure of a house, and in particular, can be used to prevent vibration of a ceiling.

[Conventional technology]

In a house, there are vibrations from daily life items such as coolers and refrigerators, vibrations from indoor noises such as walking indoors and falling objects, and vibrations from external noises such as automobiles and trains, and wind and earthquakes. There is a vibration due to a natural phenomenon.

6 and 7 show conventional earthquake-proofing means for houses.
In FIG. 6, an elastic member 52 such as rubber is attached to the joist 51 of the floor 50.
The elastic member 52 is provided with a weight member 5 such as a gypsum board.
3 is placed on the joist 51 in a free state, and the vibration of the floor 50 is reduced by the elastic member 52 and the weight member 53. In FIG. 7, the rubber plate 56 is interposed between the floor 54 and the lower joist 55, and the vibration of the floor 54 is reduced by the rubber plate 56 and the glass wool 57.

[Problems to be solved by the invention]

In the above-mentioned conventional technique, the magnitude that can reduce the vibration energy transmitted through the structures such as the floor and the wall of the house is about 10 dB.

In recent years, the comfort of living in houses has become more and more demanded, and it is required to reduce vibration as one of the comforts, and the conventional technology cannot always obtain satisfactory results. .

In particular, since the ceiling has a large span and area, low-frequency vibrations are likely to occur, and low-frequency vibrations greatly affect the living comfort of a house. Therefore, it is necessary to reduce such vibrations.

An object of the present invention is to provide a seismic isolation structure for a house that can greatly reduce vibrations compared with conventional ones and can effectively reduce low frequency vibrations of a ceiling having a large span area.

[Means for solving problems]

Therefore, in the earthquake-proof structure for a house according to the present invention, a space for containing a liquid is provided inside the plate member that constitutes the ceiling, and the lighting fixture is arranged above the transparent or translucent plate member. It is a feature.

[Action]

When the vibration is transmitted to the ceiling, the liquid in the space shakes at a frequency related to the liquid surface area, depth, etc. The shaking of the liquid reduces the vibration of the ceiling, and the transmitted vibration energy is close to 30 dB. Can be reduced to In particular, according to this anti-seismic measure, it is effective against low-frequency vibrations up to about 120 Hz, and the comfort of the house is improved by reducing low-frequency vibrations. In addition, the light from the lighting equipment transmits the liquid, and the liquid also enhances the indoor atmosphere.

〔Example〕

FIG. 1 shows a house 1 to which an embodiment of the present invention is applied. This house 1 is a mass-produced house, and a floor 2 is obtained by combining panels that are unitized and manufactured at a factory in advance at a construction site. , 3 and walls 4, 5, 6 are constructed. These 2 to 6 and the ceiling 7 are the constituent body 8 of the house 1, and data regarding vibration such as natural frequency of this constituent body 8 is collected by modal analysis. This modal analysis is performed as follows.

A single house 1 is tentatively built in a factory, the structure 8 of the house 1 shown in FIG. 2 is divided into a grid pattern as shown in FIG. 3, and a sensor is installed at each intersection 9.
Then, a heavy object such as a lump of clay is dropped on the floor, and the frequency, amplitude, etc. of the structure 8 generated at that time are detected by a sensor,
Collect data on the vibration of the structure 8.

By arranging this data, the vibration state of the structure 8 that is the same for each house 1, that is, the vibration mode, is found, and other than the natural frequency, etc., as shown in FIG.
The positions of the belly 10 and the node 11 in the vibration mode are found.

4 and 5 show a concrete structure of the ceiling 7 shown in FIG. 1, and the ceiling 7 is composed of a plurality of ceiling plates 12 which are plate members.
The ceiling plate 12 is suspended from a beam 14 by a fishing tree 13. Inside the predetermined ceiling plate 12A in the ceiling plate 12, a large number of space portions 15 are formed, for example, in a grid pattern, and a container 17 for containing water 16 is provided in the ceiling plate 12A by these space portions 15. It is assumed that the water 16 contained in the container 17 has a resonance frequency matched with the ceiling 7 based on the modal analysis. This resonance frequency can be obtained by setting the water surface area and depth of the water 16, in other words, the size and depth of the container 17. Further, the ceiling plate 12A on which the container 17 is provided is the belly 10 in the vibration mode shown in FIG.
A plurality of ceiling plates 12A are provided on the ceiling 7 at each position of the belly 10, as shown in FIG.

As a result, after the house 1 is built at the construction site, the ceiling 7
When the vibration is transmitted to the ceiling 7 and the ceiling 7 vibrates, the vibration of the water 16 is caused by resonance and the vibration energy is absorbed, and the vibration of the ceiling 7 is reduced by the absorbing action of the water 16. The reduction of the vibration due to the water 16 is effectively realized especially in the low frequency vibration up to about 120 Hz. Therefore, since the vibration of the ceiling 7 which is easily shaken at the low frequency due to the large span and the area is reduced, By reducing the vibration of the frequency, the living comfort of the house 1 can be improved, and the vibration energy can be reduced up to about 30 dB.

Further, according to the present embodiment, since water is stored inside the ceiling plate 12A, the ceiling plate 12A constituting the ceiling doubles as a water storage member, and the structure can be simplified accordingly.

Even if the natural frequency of the water 16 deviates from the natural frequency of the ceiling 7, or even if the position of the ceiling plate 12A deviates from the belly 10 having the largest amplitude, the reduction of vibration is effective to some extent. Will be achieved.

Further, as shown in FIG. 4, a lighting device 18 is provided on the ceiling plate 12A.
And the ceiling plate 12A is transparent or semi-transparent, the light from the lighting fixture 18 can pass through the water 16 to enhance the indoor atmosphere.

The ceiling 7 described above is the ceiling on the second floor as shown in FIG. 1, but the embodiment described above can of course be applied to the ceiling on the first floor.

The present invention can be applied not only to mass-produced houses but also to houses such as custom-built houses where only one house is built. In the case of a mass-produced house, water may be poured into the space inside the ceiling plate at the factory, but water should be poured at the construction site of the house considering the transportability and handleability of the ceiling plate. Good. Further, in the above embodiment, the vibration was reduced by water, but other liquids may be used. However, if a liquid with low viscosity such as water is used, good seismic absorption characteristics can be obtained, and if water is used, it is advantageous in terms of handling and cost.

[Effect of device]

According to the present invention, it is possible to greatly reduce vibrations compared with conventional ones, and it is possible to effectively reduce low-frequency vibrations of a ceiling having a large span and area. By reducing the low-frequency vibrations, the living comfort of a house is further improved. Can be improved. Further, since the liquid is stored inside the plate member that constitutes the ceiling, this plate member also serves as the liquid storage member, and the simplification of the structure is achieved. Furthermore, the plate member is transparent or translucent. Since the luminaire is arranged on the upper side, the indoor atmosphere can be enhanced by the light from the luminaire that has passed through the liquid.

[Brief description of drawings]

FIG. 1 is a sectional view of a house to which the embodiment of the present invention is applied, FIG. 2 is a perspective view of a house in which a modal analysis of vibration is performed, and FIG. 3 is a position where a sensor is installed when performing a modal analysis. Fig. 4 is a perspective view of a house showing Fig. 4, Fig. 4 is a vertical sectional view of a ceiling, Fig. 5 is a bottom view of Fig. 4, and Figs. 6 and 7 are vertical sectional views showing a conventional technique. 1 ... House, 2, 3 ... Floor, 4, 5, 6 ... Wall, 7 ... Ceiling, 1
0 ... antinode of vibration mode, 11 ... node of vibration mode, 12 ... ceiling plate which is a plate member, 15 ... space part, 16 ... water which is liquid, 17 ... container, 18 ... lighting equipment.

Claims (1)

[Scope of utility model registration request] 1. A seismic isolation structure for a house, wherein a transparent or semi-transparent plate member forming a ceiling is provided with a space filled with a liquid, and a lighting fixture is arranged above the plate member. .