JP3287090B2 - Seismic isolation 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 seismic isolation device that reduces vibrations applied to structures such as buildings due to crustal deformation such as earthquakes, protects the structures from vibrations, and enables three-dimensional seismic isolation. About.

[0002]

2. Description of the Related Art As a seismic isolation device for protecting a structure from vibration, for example, as described in Japanese Patent Application Laid-Open No. 2-47477, a rubber laminate and a rubber film in which a rubber plate and a metal plate are alternately laminated are provided. An air spring using an air spring is known.

[0003]

By the way, the seismic isolation device described in the above publication uses an air spring provided with a rubber film, and attempts to isolate and remove vibrations generated on a floor to which a relatively small weight is applied. Therefore, if this is applied as a seismic isolation device for a structure itself that adds a large weight, such as a building, the rubber film may be extremely deformed and may not achieve the substantial seismic isolation function. On the other hand, if an attempt is made to obtain a seismic isolation function by preventing deformation even if a large load is supported, an air spring provided with a large rubber film is required, and the installation location of the seismic isolation device itself becomes considerably large.

[0004] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to reduce vibration applied to a structure such as a building due to crustal deformation such as an earthquake so that the structure such as a building is reduced. It is an object of the present invention to provide a seismic isolation device that can effectively protect even a structure itself to which a large weight is added from vibration, and that does not require a large installation space.

[0005]

According to the present invention, the object is to provide a seismic isolation device disposed between a structure foundation and a structure, wherein the seismic isolation device includes a laminated rubber body and an air spring device. And the air spring device is achieved by a seismic isolation device consisting of a flat flexible metal tube enclosing high-pressure air.

In the present invention, the laminated rubber body may be a lead-containing laminated rubber body having a laminated rubber and a columnar lead disposed at the center of the laminated rubber, or may be a simple laminated rubber body composed of only the laminated rubber. Further, each rubber of the laminated rubber body may be manufactured from high attenuation rubber.

In a preferred embodiment of the present invention, a plurality of flexible metal tubes are vertically stacked and a plurality of flexible metal tubes are juxtaposed in a horizontal direction. , A plurality of juxtaposed in the horizontal direction. When a plurality of elongated flexible metal tubes are vertically stacked and arranged side by side in a horizontal direction, the flexible metal tubes of adjacent layers may be arranged in the same direction or arranged in a lattice. You may.

In the present invention, the inside of the flexible metal pipe may be communicated with the inside of the auxiliary tank to which the compressor is connected. In this case, preferably, the inside of the flexible metal pipe and the inside of the auxiliary tank are connected. A valve, preferably a valve having an orifice function, is interposed therebetween. And in such a seismic isolation device, a vibration detecting means for detecting vibration applied to the structure, and a control means for controlling at least one of the opening degree of the valve and the operation of the compressor by a detection signal from the vibration detecting means. Is preferable because the seismic isolation function can be made variable in accordance with the magnitude of the vibration (acceleration, velocity or amplitude) or the degree of vibration damping, and can be called an active seismic isolation device. The vibration detecting means may be provided on the crust itself to detect vibration applied to the structure, but may be provided on a laminated rubber body, an air spring device, a structure foundation or a structure. The vibration detecting means may be any of an acceleration detector, a speed detector, and an amplitude detector, and may be appropriately selected according to the seismic isolation function to be achieved.

The flexible metal tube is made of a titanium alloy (Ti-6).
Al-4V or Ti-3Al-2.5V, etc.), an aluminum alloy (superplastic type 7475, etc.) or a lead-aluminum alloy is preferable, and a titanium alloy is particularly preferable. Further, the thickness of the flexible metal tube is 1 mm
The thickness is preferably about 0.2 mm or less, and may have a single-layer structure, or may have a two-layer structure or a multilayer structure.

[0010]

In the seismic isolation device according to the present invention, the horizontal vibration is effectively reduced by the laminated rubber body, and the flat flexible metal tube filled with high-pressure air effectively reduces the vertical vibration. Thus, three-dimensional seismic isolation is enabled. The flexible metal tube has a pressure resistance several hundred times that of an air spring provided with a rubber film, so that a large load can be supported without requiring a large installation place.

Next, the present invention will be described in more detail based on preferred embodiments shown in the drawings. The present invention is not limited to these specific examples.

[0012]

1 to 6 show a seismic isolation device 1 of this embodiment.
Is disposed between the structure foundation 2 and the structure 3, and includes a laminated rubber body 4 and an air spring device 5, and the air spring device 5
A plurality of flat flexible metal tubes 6 filled with high-pressure air are juxtaposed in the horizontal direction and stacked in the vertical direction.

The laminated rubber body 4 includes a laminated rubber 17 formed by alternately laminating an annular rubber disk 13 and an annular metal disk 14 between a lower disk 11 and an upper disk 12, and a lower disk 11. 11 and a cylindrical lead 18 disposed between the upper disc 12 and the center of the laminated rubber 17, and the lower disc 11 is attached to the structural foundation 2 by anchor bolts (not shown). I have. The upper disk 12 is bolted to a rigid intervening member 15 disposed between the air spring device 5 and the laminated rubber body 4.

Each of the flexible metal tubes 6 of this embodiment is made of a titanium alloy having a thickness of 0.5 mm and has a flat portion 21 at the center.
Are provided at both ends of the flat portion 21, eight of which are arranged in parallel with each other at predetermined intervals in the horizontal direction, and five of which are stacked in contact with each other in the vertical direction. It is mounted on the member 15.

The upper rectangular plate 31 placed on the uppermost layer of the flexible metal tube 6 is attached to the structure 3 by bolts 32. The reinforcing member 3 is provided on the lower surface of the upper rectangular plate 31.
A regulating plate 34 reinforced by 3 surrounds the air spring device 5 and is attached by welding or the like.

In this embodiment, one end 22 of the flexible metal tube 6 is connected to a collecting pipe 41 via a branch pipe 40.
Is connected to a compressor 45 via a valve 42 having an orifice function, a supply / discharge pipe 43 and an auxiliary tank 44. Similarly, the other end of the flexible metal tube 6 is a branch pipe, a collecting pipe,
It is connected to a compressor 45 via a valve having an orifice function, a supply / discharge pipe and an auxiliary tank 44.

In the seismic isolation device 1 configured as described above,
The horizontal vibration component of the structure foundation 2 based on the crustal deformation such as an earthquake is not transmitted to the structure 3 due to the shear deformation of the laminated rubber body 4 having a restoring force, and even if the horizontal vibration component is transmitted to the structure 3. While being reduced by the shear deformation of the laminated rubber body 4, the vertical vibration component of the structural foundation 2 based on the crustal deformation such as an earthquake is reduced by the air spring device 5 composed of the laminated flexible metal pipes 6. Will not be transmitted to Further, in the seismic isolation device 1 of this example, since the inside of each of the flexible metal tubes 6 is communicated with the inside of the auxiliary tank 44 via the valve 42 having an orifice function, the vertical vibration component of the structural foundation 2 is , Is preferably attenuated by the resistance of the air to move through the valve 42.

Note that the flexible metal tube 6 may be
If the internal pressure of the flexible metal tube 6 is lower than the predetermined value, the compressor 45 is operated to maintain the internal pressure of the flexible metal tube 6 at the predetermined value.

The air spring device 5 of the seismic isolation device 1 is composed of a plurality of flat flexible metal tubes 6 filled with high-pressure air, which are juxtaposed in the horizontal direction and stacked in the vertical direction. Because of this, a large load can be sufficiently supported, and the flexible metal tube 6 itself does not swell and does not lose its seismic isolation function. Further, when the air spring device 5 is formed by arranging a plurality of flat flexible metal tubes 6 in the horizontal direction as in this example, damage, air leakage, etc. occur in one flexible metal tube 6. However, the structure 3 can be supported by the remaining flexible metal tube 6 and the seismic isolation function is not significantly reduced, so that an extremely fail-safe seismic isolation device can be provided.

In the above example, the air spring device 5 is formed by arranging a plurality of flexible metal tubes 6 in the horizontal direction. Alternatively, the air spring device 5 may have a flat area having a relatively large area in the horizontal direction. The air spring device may be formed by stacking the flexible metal tubes 6 only in the vertical direction.

Further, as shown in FIG. 5, a vibration detecting means 51 for detecting vibration applied to the structure 3 and a control means 52 for controlling the opening degree of the valve 42 based on a detection signal from the vibration detecting means 51 are provided. Thus, the opening degree of the valve 42 may be controlled to change the air movement resistance when passing through the valve 42 so that the vibration generated in the structure 3 is reduced as quickly as possible. At this time, the operation of the compressor 45 may be similarly controlled by a detection signal from the vibration detection means 51.

[0022]

As described above, according to the present invention, the vibration applied to a structure such as a building due to crustal deformation such as an earthquake is reduced, and the structure itself, such as a building, to which a large weight is added can be protected from vibration. A seismic isolation device that can be effectively protected can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view, partly in section, of one preferred embodiment according to the present invention.

FIG. 2 is a partial plan view of one specific example shown in FIG.

FIG. 3 is a sectional view taken along line III-III shown in FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV shown in FIG. 2;

FIG. 5 is a schematic view in which the specific example shown in FIG. 1 is arranged between a structure foundation and a structure.

FIG. 6 is an enlarged perspective view of a flexible metal tube used in the specific example shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 seismic isolation device 2 structural foundation 3 structure 4 laminated rubber body 5 air spring device 6 flexible metal tube

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichi Akutsu 1 801 Mukaiyama, Naka-cho, Naka-machi, Naka-gun, Ibaraki Prefecture (72) Inventor Kyosuke Sato 2-6 Minamisuna, Koto-ku, Tokyo 5 Kawasaki Heavy Industries, Ltd. Tokyo Design Office (72) Inventor Michiaki Suzuki 2-6-5 Minamisuna, Koto-ku, Tokyo Kawasaki Heavy Industries, Ltd. Tokyo Design Office (72) Inventor Seiichiro Yamazaki 2-chome, Minamisuna, Koto-ku, Tokyo 6-5 Kawasaki Heavy Industries, Ltd. Tokyo Design Office (72) Inventor Ikuo Shimoda 8 Kirihara-cho, Fujisawa-shi, Kanagawa Oiles Industry Co., Ltd. Fujisawa Plant (72) Inventor Masayoshi Ikenaga 8 Kirihara-cho, Fujisawa-shi, Kanagawa Oiles In the Fujisawa Plant of Kogyo Co., Ltd. (56) References Real Opening Showa 64-744 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) E04H 9/02 331 F16F 9/04 F16F 15/04 E04B 1/36

Claims (8)

(57) [Claims] 1. A seismic isolation device disposed between a structure foundation and a structure, wherein the seismic isolation device includes a laminated rubber body and an air spring device, and the air spring device encloses high-pressure air. A seismic isolation device consisting of a flat, flexible metal tube. 2. The seismic isolation device according to claim 1, wherein a plurality of flexible metal tubes are vertically stacked. 3. The seismic isolation device according to claim 1, wherein a plurality of flexible metal tubes are juxtaposed in a horizontal direction. 4. The seismic isolation device according to claim 1, wherein the inside of the flexible metal tube communicates with the inside of an auxiliary tank to which a compressor is connected. 5. The seismic isolation device according to claim 4, wherein a valve is interposed between the inside of the flexible metal tube and the inside of the auxiliary tank. 6. A vibration detecting means for detecting a vibration applied to a structure, and a control means for controlling at least one of a valve opening and a compressor operation based on a detection signal from the vibration detecting means. The seismic isolation device according to claim 5. 7. The seismic isolation device according to claim 5, wherein the valve has an orifice function. 8. The seismic isolation device according to claim 1, wherein the flexible metal tube is made of a titanium alloy.