JPH05231473A - Base isolation and vibration damping structure for structure - Google Patents

Abstract

PURPOSE:To suppress the vibrational displacement of the whole structure to a minimum by supporting the lower end part of the structure by a base isolation member and the upper end part of the structure by a damping member. CONSTITUTION:A base isolation member 4 is placed between the building floor surface 2 and an interior installed structure 3.so as to support this interior installed structure 3. A damping member 5 is disposed at the upper end part of the interior installed structure 3 and rigidly fixed to the building ceiling face 1. The base isolation member 4 and damping member 5 are to be laminated structure of rubber and metal, for instance. When earthquake is generated, an earthquake wave element is applied to the whole interior installed structure 3. Even if the earthquake wave element contains an element equal to the characteristic frequency of the structure 3, the base isolation member 4 at the lower end part of the structure 3 and the damping member 5 at the upper end part of the structure 3 are both deformed in the complementary state to absorb the wave energy of the earthquake.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for seismic isolation and damping.

[0002]

2. Description of the Related Art A conventional seismic isolation / vibration control structure for indoor installation structures will be described with reference to FIG. In FIG. 3, 1 is the ceiling surface of the building, 2 is the floor surface of the building, 3 is an indoor installation structure, 4 is a seismic isolation member, and is located between the building floor surface 2 and the indoor installation structure 3 and is installed indoors. It supports the structure 3.

Next, the operation will be described. In FIG. 3, when an earthquake having a strong wave energy occurs, even if the seismic wave component includes a component equal to the natural frequency of the indoor installation structure 3, it is distributed to the lower end of the indoor installation structure 3. Due to the deformation of the seismic isolation member 4, the indoor installation structure 3
The entire structure is largely displaced to absorb the wave energy of seismic waves and not to cause resonance. By the way, as shown in Japanese Utility Model Publication No. 57-94997, there is a structure in which the upper part of the installed structure is supported by a spring and the lower part is directly grounded to the floor surface.

[0004]

Since the conventional seismic isolation structure for the indoor installation structure 3 is constructed as described above, the vibration of the indoor installation structure 3 is reduced, but the overall vibration displacement is increased. .. When this vibration displacement becomes very large, there is a problem that the function as a structure is impaired.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to prevent damage to a structure due to an earthquake and to suppress vibration displacement of the entire structure to a minimum. ..

[0006]

According to a structure for seismic isolation and damping of a structure according to the present invention, a lower end portion of the structure is supported by a seismic isolation member, and an upper end portion of the structure or the vicinity of the center of gravity thereof is supported by a seismic suppression member. It was done.

[0007]

In the present invention, the seismic isolation member supporting the lower end of the structure absorbs vibration energy, and the damping member supporting the upper end of the structure or the vicinity of the center of gravity suppresses the vibration displacement of the entire structure. Suppress and keep the structure safe with its synergistic effect.

[0008]

EXAMPLES Example 1. The seismic isolation and damping structure of the structure according to the present invention is
An example will be described with reference to FIG. In FIG.
1 to 4 are the same as the conventional technique, and 5 is a vibration control member arranged at the upper end of the indoor installation structure 3 and fixed to the building ceiling surface 1. The seismic isolation member 4 and the vibration damping member 5 are formed of, for example, a laminated structure of rubber and metal.

Next, the operation of the first embodiment will be described. When an earthquake having strong wave energy occurs, the seismic wave component is added to the entire indoor installation structure 3. Even if a component equal to the natural frequency of the structure 3 is included in the seismic wave component, the seismic isolation member 4 located at the lower end of the structure 3 and the damping member 5 located at the upper end of the structure 3 are Both are deformed complementarily and absorb the wave energy of the earthquake. Therefore, the vibration displacement of the structure 3 is also significantly reduced. Although the laminated structure is used as the vibration damping member 5 in the above, a member having a spring property such as a coil spring may be used instead of this.

Embodiment 2. In the first embodiment, the vibration damping member 5
Although a laminated structure of rubber and metal was used for the structure, as shown in FIG. 2, a member having elasticity such as a coil spring is used as the damping member 5 to support the vicinity of the center of gravity 6 of the indoor installation structure 3 as a structure. Good. By supporting this center of gravity 6, it is possible to effectively absorb the seismic wave energy that causes vibration acceleration in the mass of the indoor-installed structure 3, and to further enhance the seismic control and seismic isolation functions. It goes without saying that the laminated structure used in the first embodiment may be used in place of the member having elasticity such as the coil spring used as the vibration control member 5 in the second embodiment. When this second embodiment is applied to a structure such as a power circuit breaker, good effects are exhibited.

In the above embodiment, an example of an indoor installation structure was given. However, the lower end of an outdoor installation structure is supported on the ground or concrete foundation through a seismic isolation member, and the upper end of this outdoor installation or Even if the vicinity of the center of gravity is supported by something like a steel tower through a vibration control member, the same effect as above can be obtained.

[0012]

As described above, according to the present invention, the lower end of the structure is supported by the seismic isolation member, and the upper end of the structure or the vicinity of the center of gravity is supported by the seismic control member. Even if the component contains a component equal to the natural frequency of the structure, both the above-mentioned seismic isolation member and damping member complementarily absorb this seismic wave energy, so the vibration displacement of the structure is greatly reduced. There is an effect of doing.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a conventional seismic isolation / damping structure for a structure.

[Explanation of symbols]

 1 Building ceiling surface 2 Building floor surface 3 Indoor installation structure 4 Seismic isolation member 5 Seismic damping member 6 Center of gravity

[Procedure amendment]

[Submission date] May 13, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

Since the conventional seismic isolation structure of the indoor installation structure 3 is configured as described above, the vibration acceleration of the indoor installation structure 3 is reduced, but the installation structure 3 is reduced.
The vibration displacement of is large. When this vibration displacement becomes very large, there is a problem that the function as a structure is impaired.

Claims (2)

[Claims] 1. A seismic isolation / vibration control structure for a structure, characterized in that the lower end of the structure is supported by a seismic isolation member, and the upper end of the structure is supported by a seismic control member. 2. A seismic isolation / vibration control structure for a structure, characterized in that the lower end of the structure is supported by a seismic isolation member, and the vicinity of the center of gravity of the structure is supported by a seismic control member.