JPH03244767A - Anti-seismic and vibration resisting device for structure - Google Patents

Abstract

PURPOSE:To provide an enough anti-seismic and vibration resisting function for strong and weak vibration by providing high damping lamination rubber with the anti-seismic and vibration resisting function for mainly horizontal movement and damping lamination rubber with the anti-seismic and vibration resisting function for mainly vertical movement. CONSTITUTION:High damping lamination rubber 1 is placed on a lower structure 2, a frame 3 is placed thereon, and damping lamination rubber 4, e.g. standard lamination rubber or high damping lamination rubber, is formed on the frame 3. A building, e.g. a housing, and an upper structure 5, e.g. a building where a precision machine is installed, is built on the damping lamination rubber 4. Lamination rubbers 6 and 6, comprising high damping lamination rubber, a visco-elastic substance, a stopper, a damping device, are located between inclination sides 3a and 3a of the frame 3 and bracket parts 5a and 5a formed to the upper structure 5. The high damping lamination rubber 1 is provided with an anti-seismic and vibration resisting function for mainly horizontal movement, and the damping lamination rubber 4 with the anti-seismic and vibration resisting function for mainly vertical movement.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seismic isolation/vibration isolation device for structures, particularly buildings on tracks or roads, structures in which precision machinery, etc. are installed. .

[Prior Art 1] It goes without saying that, in general, above-ground structures must be designed and constructed so that they will not collapse due to earthquakes.

On the other hand, buildings such as houses, condominiums, hotels, theaters, hospitals, etc. that are built in spaces above sources of traffic vibration such as tracks and roads, as well as structures such as precision machinery factories and computer facilities, are subject to the earthquake countermeasures mentioned above. In addition, it is necessary to take measures to prevent damage caused by traffic vibrations.

In the United States, a seismic isolation device that protects buildings from earthquakes is one that uses laminated rubber between the ground and the building to prevent vibrations from being transmitted from the ground to the building, as shown in Figure 5. there were.

However, since the laminated rubber has a very rigid structure in the vertical direction, it could hardly be expected to be effective in isolating minute vibrations in the vertical direction such as traffic vibrations. In particular, when steel, lead, or the like was added as a damping device, there was no effect at all against minute vibrations in the horizontal and vertical directions.

Furthermore, in recent years, laminated rubber has been developed for the purpose of isolating minute vibrations in the vertical direction such as the above-mentioned traffic vibrations.

[Problem to be Solved by the Invention 1] However, as shown in Fig. 6, the laminated rubber produced in the United States is susceptible to earthquakes because natural rubber and high-damping laminated rubber are housed in one set of equipment. Not only is it not possible to obtain sufficient damping performance against vibrations in the horizontal direction, but there are also problems such as creep, which makes it impossible to create a device that is soft enough to isolate minute vibrations in the vertical direction. There was a point.

The present invention was made to solve the above-mentioned problems in the United States, and its purpose is to reduce vibrations ranging from large vibrations in both vertical and horizontal directions to minute vibrations, such as earthquakes and traffic vibrations. It is an object of the present invention to provide a seismic isolation/vibration isolating device for a structure that can not only exhibit sufficient seismic isolation and vibration isolation effects, but also stably maintain its function over a long period of time.

[Means for Solving the Problems 1] The seismic isolation/vibration isolation device for structures of the present invention includes installing high-damping laminated rubber on a substructure that is integrated with a structure that is a source of traffic vibration, such as the ground or track. Then, a pedestal is placed on the high-damping laminated rubber,
Damping laminated rubber such as natural rubber-based standard laminated rubber or high-damping laminated rubber is installed on the frame, and 1 is placed on the laminated rubber for buildings such as houses, condominiums, hotels, etc., and buildings in which precision machinery, etc. are installed. A high-damping laminated rubber material is used to stop horizontal vibrations and provide sufficient damping performance against vertical vibrations between the side surface of the pedestal and the bracket formed on the upper structure. The viscoelastic material is interposed with a laminated rubber consisting of a stopper that stops vibrations in the horizontal direction, a damping device that has sufficient damping performance against vibrations in the vertical direction, and a stopper that stops vibrations against large vertical movements. Finally, the high damping laminated rubber has a seismic isolation/vibration function mainly against horizontal motion, and the damping laminated rubber has a seismic isolation/vibration function mainly against vertical motion. It is characterized by

Further, the pedestal is characterized in that the side surface of the pedestal is inclined toward the top.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In Figure 1, 1 is a high-damping laminated rubber. Carbon is mixed into the rubber material to give the laminated rubber itself damping performance, and it is integrated with structures that are sources of traffic vibration, such as the ground and tracks. It is installed on the lower structure 2. A pedestal 3 is placed on the high-damping laminated rubber 1.

Further, a laminated rubber 4 is installed on the pedestal 3.

The laminated rubber 4 is a damping laminated rubber such as natural rubber-based standard laminated rubber or high-damping laminated rubber that does not cause problems such as creep, and is soft in the lamination direction, that is, in the vertical direction.
I looked at it as if it were a building. The laminated rubber 4 is designed to avoid resonance by adding a viscoelastic body that provides large damping to large vibrations, or by adding vertical rigidity.

On the laminated rubber 4, the upper vIr of buildings such as houses, condominiums, hotels, etc.
Contains Relic 5.

The side surface 3a of the pedestal 3 is slightly inclined upward,
A laminated rubber 6 is interposed between the bracket portion 5a of the upper structure 5 and the inclined surface 5a' parallel to the inclined side surface 3a. The laminated rubber 6 is made of high-damping laminated rubber or a viscoelastic material that stops vibrations in the horizontal direction and provides sufficient damping performance for vibrations in the vertical direction.

Since the seismic isolation/vibration isolator of this embodiment is subjected to W# as described above, when large horizontal vibrations due to an earthquake act on the lower structure 2, as shown in FIG. The horizontal vibration caused by an earthquake is seismically isolated by the high-damping laminated rubber 1, and the structure above the pedestal 3 behaves as one.

In addition, when a minute vibration in the vertical direction due to traffic vibration acts on the lower structure 2, the minute vibration in the vertical direction is transmitted through the high damping laminated rubber 1 to the pedestal 3, as shown in FIG. However, the laminated rubber 4 prevents the transmission to the upper structure 5. Furthermore, the laminated rubber 6 attached to the side surface of the pedestal 3 also stops vibrations in the horizontal direction, exhibits sufficient damping performance against vibrations in the vertical direction, and is not transmitted to the upper structure 5. The transmission of small horizontal vibrations caused by traffic vibrations to the upper part is prevented by the highly damped laminated rubber 1.

Note that the angle of inclination of the inclined side surface 3a and the inclined surface 5a' may be changed, or the dimensions such as the size and thickness of the laminated rubber 6 may be changed.
By changing the attenuation characteristics etc., the required attenuation performance can be obtained.

In addition, as shown in FIG. 4, a steel rod 7 is fixed to the pedestal 3,
The steel rod 7 may be inserted into an elongated hole 8a of a control member 8 attached to the bracket portion 5a to add damping performance against large vibrations in the vertical direction.

[Effect of the invention 1 (1) Sufficient vibration isolation/vibration isolation performance can be exhibited from minute vibrations such as traffic vibrations to large vibrations such as earthquakes.

(2) For structures such as houses, condominiums, hotels, theaters, hospitals, etc. built in spaces above sources of traffic vibration such as tracks and roads, as well as buildings such as precision machinery factories and computer facilities. In addition to earthquake countermeasures, measures can be taken to prevent damage caused by traffic vibrations.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the seismic isolation/vibration isolating device of the present invention, Fig. 2 is an explanatory diagram of behavior in response to horizontal vibration, and Fig. 3 is an explanatory diagram of behavior in response to vertical vibration. Figure 4 is an explanatory diagram of the main parts showing another embodiment, Figure 5 is a schematic diagram of a building with a conventional seismic isolation structure, and Figure 6 is a diagram of a conventional laminated rubber structure that copes with horizontal and vertical vibrations. FIG. 1...High damping laminated rubber, 2...Substructure, 3...
・Frame, 3a... Inclined side surface, 4... Laminated rubber, 5.
...Superstructure, 5a...Bracket part, 5a'...
・Sloped surface, 6... Laminated rubber, 7... Steel bar, 8...
Control member, 8a...long hole.

Claims (1)

[Scope of Claims] 1. A high-damping laminated rubber is installed on a lower structure that is integrated with a structure that is a traffic vibration source such as the ground or a track, and a frame is placed on the high-damping laminated rubber, and the frame A damping laminated rubber such as natural rubber-based standard laminated rubber or high damping laminated rubber is installed on top.
Buildings such as houses, condominiums, hotels, etc. are placed on the laminated rubber,
Place superstructures such as buildings with precision machinery, etc.
High damping laminated rubber, viscoelastic material, or horizontal vibration that stops horizontal vibration and provides sufficient damping performance against vertical vibration between the side surface of the mount and the bracket formed on the upper structure. A laminated rubber consisting of a stopper to stop vibrations, a damping device with sufficient damping performance against vertical vibrations, and a stopper to stop vibrations against large vertical movements is interposed, and the high-damping laminated rubber is mainly A seismic isolation system for a structure characterized in that it has a seismic isolation and vibration isolation function against horizontal motion, and the damping laminated rubber has a seismic isolation and vibration isolation function mainly against vertical movement. Vibration isolator. 2. The seismic isolation/vibration isolation device for a structure according to claim 1, wherein a side surface of the pedestal is inclined toward an upper surface.