JPS62146368A - Earthquakeproof system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a structure seismic isolation system, and particularly to a structure seismic isolation system that efficiently attenuates the amplitude of shaking of a structure during an earthquake. .

<Prior Art> When constructing a structure such as a building or a tower, a seismic isolation system has been realized by placing laminated rubber between the structure and the foundation that supports it. Conventionally, this structural seismic isolation system is constructed by installing a laminated rubber between a building and a foundation, and supporting the building in a floating state from the foundation by this laminated rubber. Laminated rubber is made by stacking plate-shaped rubber materials and metal plates alternately and integrating them, and when a predetermined acceleration is applied to a building due to an earthquake, etc., the gap between the building and the foundation It is designed to elastically deform and cause relative displacement to prevent the building from collapsing. In such a seismic isolation structure system, the laminated rubber simply deforms elastically and is useful in preventing the building from collapsing, but in view of the fact that the shaking of the building must be left to natural attenuation, Efforts have been made to effectively dampen vibrations.

One example of this is to make a hole in the vertical direction of the laminated rubber and seal a cylindrical body made of lead as a plug in the hole. With this configuration, the lead plug is deformed in the shearing direction, and the resistance at this time attenuates the shaking.

<Problems to be solved by the invention> However, in the above-mentioned seismic isolation system, if the shear deformation of the lead plug becomes excessive due to an earthquake, for example, the damage between the metal plates constituting the laminated rubber There is a possibility that a phenomenon such as the lead plug sinking into the rubber material occurs, and the laminated rubber is damaged by the interaction between the laminated rubber and the lead plug, and there is a problem that the elastic support performance of the laminated rubber is likely to deteriorate. Further, even if a problem such as damage occurs only to the lead plug in the rubber layer, the entire rubber layer must be replaced, which may result in economic loss.

The present invention has been made in view of these conventional problems, and its purpose is to prevent laminated rubber from being damaged even in the event of shaking such as an earthquake, and to replace parts at low cost. The objective is to provide a seismic isolation system that can

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a laminated rubber installed between a structure such as a building and a foundation, and this laminated rubber at a predetermined interval, The gist is a seismic isolation system consisting of a damping device connected between the structure and the foundation.

<Effect> When an earthquake occurs, relative displacement occurs between the structure and the foundation in the lateral direction (horizontal direction). The laminated rubber follows this displacement movement while causing elastic deformation.
Prevents destruction of the joint between the structure and the foundation. On the other hand, the damping device acts as a resistance to the displacement movement between the structure and the foundation and dampens the sway of the structure. For this reason,
Each time the structure attempts to sway in the direction relative to the foundation or in the opposite direction, the damping device provides resistance, and the sway of the structure is rapidly reduced.

<Description of Embodiment> The figure is a sectional view showing a seismic isolation system according to an embodiment of the present invention. This seismic isolation system consists of a foundation 6 and a structure 5 such as a building installed at a predetermined interval above this foundation v16.
and a damping device 3 disposed between the structure 5 and the foundation 6 at a position spaced apart from the laminated rubber 4 by a predetermined distance. The damping device 3 includes a base plate 7 that is fixed to the foundation 6 by bolts or other fastening members, a block body 2 made of an elastic material such as rubber that is integrally attached to the base plate 7, and a block body 2 located approximately at the center of the block body 2. It consists of an enclosed columnar body 1. The columnar body 1 is formed by molding lead material, which is a viscoelastic material. This damping device 3 has a concave six-eighth on the bottom surface of the structure 5.
is opened, and the base plate 7 is fixedly connected to the foundation 6, while the head of the block body 2 is fitted into the hole 8, thereby connecting the structure 5 and the foundation 6.

The head of the block body 2 may be firmly fitted into the hole 8, but it is not necessary to do so, and the structure 5 and the foundation 6
The engagement may be loose as long as the block body 2 is set so as not to come off from the 68 when the two move relative to each other.

Further, the laminated rubber 4 is tightly bonded to the structure 5 and the foundation 6.

In a seismic isolation system having such a configuration, when the structure 5 is shaken by an earthquake or the like, a horizontal displacement movement occurs between the structure 5 and the foundation 6. Due to this displacement movement, the laminated rubber 4 undergoes elastic deformation in the shearing direction, absorbs the shaking to a considerable extent, and supports the structure 5 without causing damage to the connection portion between the structure 5 and the foundation 6. On the other hand, the damping device 3 normally stands completely free from the structure from the foundation 6, but once the structure 5 begins to sway, it is connected to the structure 5 through the side wall of the hole 8. However, it exerts a large resistance on the structure 5.

This resistance acts against the structure's sway in one direction as well as in the opposite direction, so that the sway (or vibration) is rapidly attenuated. Note that when the performance of the damping device deteriorates due to changes over time, etc., it is sufficient to replace only this damping device with a new one, which reduces the cost required for device replacement.

<Effects of the Invention> As explained above, according to the present invention, since the damping device is arranged at a position apart from the laminated rubber supporting the structure, the laminated rubber is No inconvenience such as damage to the rubber occurs. Further, in the event that a problem occurs with the damping device, it is only necessary to replace the damping device, so that various effects can be obtained, such as being able to reduce the cost required for maintenance.

[Brief explanation of drawings]

The figure is a sectional view showing an embodiment of the seismic isolation system according to the present invention. 1. Lead plug, 2. Block body, 3. Damping device,
4. Laminated rubber, 5. Structure, 6. Foundation, 7. Base plate, 8. Hole.

Claims (1)

[Claims] Seismic isolation consists of a laminated rubber installed between the structure and the foundation to support the structure, and an attenuator connected between the structure and the foundation at a predetermined distance from the laminated rubber. system.