JPH02285176A - Response control device of building - Google Patents

Abstract

PURPOSE:To reduce the cost of a device and to promote durability by lying and filling a plurality of steel balls and viscous materials between a column and foundation of a building and, at the same time, loading a horizontal spring between a skeleton of the building and a foundation structure. CONSTITUTION:A plate-like piece 1 in which a plurality of steel balls 2 are buried so that they are cable of rolling is formed, and it is mounted between a column A and foundation B through horizontal steel plates 3 and 3'. Then, the peripheral edge of the plate 1 is coated with a rubber sheet 4 and an enclosing plate 7, and corrosion resisting viscous materials 5 such as grease are filled inside the plate. After that, a horizontal spring G consisting of an air spring is loaded between the outside of the column A and a retaining wall E. A bundle consisting of a large number of steel bars or a rubber block as the horizontal spring is provided, and it may be lain and fixed between a beam C and a floor slab D. According to this constitution, the insulation of horizontal earthquake force and horizontal direction stability can be maintained and, at the same time, a device at a low cost and with excellent durability can be formed.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a seismic isolation device for buildings.

(Prior art) Conventionally, as a seismic isolation device for a building, a laminated rubber bearing made by bonding thin steel plates and thin rubber pieces in alternate layers is interposed between the pillars of the building and the foundation. Generally used.

(Problem B to be Solved by the Invention) In the conventional seismic isolation device, the laminated rubber is used to support the high axial pressure columns of the building and to serve as a horizontal spring for horizontal stability. Since both functions are required,
Since a large amount of rubber is used, it is expensive, and the rubber is used under the column under high pressure, there are problems in terms of durability.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to provide a seismic isolation system for buildings that has an excellent seismic isolation effect, is economical, and is durable. The point is to provide the following.

(Means for Solving the Problems) In order to achieve the above object, the seismic isolation device for a building according to the present invention includes a plurality of steel balls embedded in the gap between the pillars and the foundation of the building so as to be able to roll freely. In addition to arranging a plate-like piece with a viscous material, the gap is filled with or coated with a viscous material, or a shroud is provided to fill the gap, and a horizontal spring is interposed between the building frame and the foundation structure. ing.

(Function) As described above, in the present invention, a plate-like piece in which a plurality of steel balls are embedded in a freely rolling manner is interposed in the gap formed between the pillar and the foundation of the building. During an earthquake, the column slides on the steel ball and moves horizontally with respect to the foundation, causing PIEv
Transmission of horizontal seismic force from l to the column is isolated.

At the same time, a horizontal spring interposed between the building frame and the foundation structure operates to elastically support the horizontal force when the column moves, thereby maintaining the horizontal stability of the building. It is something to do.

Furthermore, during an earthquake, each part of a building undergoes complex vibrations, and some parts of the pillars may momentarily become separated from the foundation. If the steel balls are simply lined up in the column, there is a risk that the steel balls will come off the pillars during vibrations of the building, but according to the present invention, as described above, the steel balls are embedded in the plate-like pieces, Furthermore, since the gap between the column and the foundation is filled with a viscous material, the entire plate-shaped body in which the steel balls are embedded will not come off the column.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(1) is a plate-like piece of plastic in which many steel balls (2) are embedded so that they can roll freely.During the manufacturing process, the steel balls (2)
A slight gap is formed between the plate-like piece (1) and the plate-like piece (1). (See Figure 4) The plate-like pieces (1) are installed on the pillars and foundation structure of the building (horizontal steel plates (3) and The plate-shaped piece (1) is interposed in the gap between '1.
The outer periphery of the rain horizontal steel plate (rubber sheet for rust prevention and dust prevention of the steel ball (2) arranged over 3H3'1)
/1) and filled with a viscous material (5) having a rust-preventing effect such as grease or heavy oil, or by providing a surrounding plate.

If the viscous material (5) is grease or the like, it can be filled in the rubber sheet (4) as shown in the figure, or it can be simply applied to the plate-like piece in which the steel ball (2) is embedded. (See Figure 2) In the figure, (6) and (6a) indicate the screw and its washer, (force (7)
′) is a shroud. Others (Q is the beam of the building frame, 0
is the floor slab of the foundation structure, and 0 is the retaining wall of the foundation structure.

Further, a horizontal spring (D) constituted by an air spring as described later is interposed between the outside of the pillar and the retaining wall 0.

Since the illustrated embodiment is constructed as described above, in the event of an earthquake, the pillars of the building will slide along the steel balls (2) and move from the position shown in FIG. 2 to the position shown in FIG. 3. Go to
The transmission of seismic force from the foundation to the pillars is insulated.

At the same time, the horizontal force caused by the movement of the column is elastically supported by the horizontal spring (n), thereby providing horizontal stability of the building.

In the embodiment shown in FIG. 1, an air spring is used as the horizontal spring (PI). The two are integrally connected so that they communicate with each other.

Air springs have the advantage of being relatively inexpensive and easily capable of producing large loads and long strokes.Furthermore, due to the above-mentioned structure, when the air spring is compressed, There is movement of air and a damping effect is obtained. Further, by adjusting the internal air pressure and the capacity of the auxiliary tank, the spring constant of the air spring can be easily controlled, and the desired vibration characteristics can be obtained with respect to the natural period of the building. Note that instead of using an auxiliary tank for the air spring, a steel rod damper or the like may be installed separately.

Ground motion during an earthquake is extremely complex, containing vibrations from low frequencies to high frequencies.
The vibrations of each part of the building become complex, and some parts of the pillars of the building may momentarily become separated from the foundation. Therefore, the steel balls (2) installed for horizontal seismic force insulation cannot be simply placed under the pillars.
They are used to falling off the pillars when the building is vibrating, but
In the illustrated embodiment, the steel balls (2) are embedded in and integrated with the plastic plate-like piece (1), and filled with a viscous material (5). )
The entire plate-shaped piece (1) in which the embedding is embedded will not come off from the pillar. Figure 5 shows the auxiliary tank (air spring with fD (f,)
is shown interposed between the pillars of the building and the retaining wall ■ of the foundation structure.

FIG. 6 shows another embodiment of the present invention, in which, instead of the air spring, a large number of long and thin steel rods (8) are bundled together, tightly bound with steel wires, covered with a rubber sheet (9), and a large A horizontal spring (F') is formed by integrally fitting a thin steel plate cylindrical body 0ω to the lower end where stress is applied. According to this embodiment, the steel pipes (inserted into IL'l) are fixed to the horizontal spring foundation (G) provided on the floor slab 0 of the body (see Figs. 7 to 11). For example, since the horizontal spring (F') is composed of many long and thin steel rods (8) stacked on top of each other, it is possible to undergo large elastic deformation as shown in Figure 12 as the pillars move during an earthquake, and at the same time A vibration damping effect occurs due to the friction acting between the stacked steel bars (8).

At this time, if the gap between the steel pP (81) is filled with a strong viscous material, a more significant vibration damping effect can be obtained.

Furthermore, in the event of a severe earthquake, the human-powered seismic energy can be absorbed by plastic deformation of the steel rod (8).

FIG. 13 shows still another embodiment of the present invention, in which the foundation for horizontal springs on the floor plate of the building and the floor slab of the foundation structure.
A horizontal spring (P'') made of rubber block Q21 as shown in Fig. 14 is interposed between the horizontal spring (F') and I), and during an earthquake, the horizontal spring (F') undergoes large elastic deformation as shown in Fig. 15. , it is possible to extend the unique !WI period of the building and reduce the horizontal seismic force.

In this case, by configuring the rubber block surface from high-damping rubber, seismic input energy can be absorbed and the vibration reduction effect of the building can be significantly increased.

(Effects of the Invention) According to the present invention, as described above, a plate-like piece in which a plurality of steel balls are embedded in a rolling manner is disposed in the gap between a column of a structure and a foundation, and By filling the columns with a viscous material, it is possible to insulate the transmission of horizontal seismic force from the foundation to the columns during an earthquake.

Furthermore, according to the present invention, a horizontal spring is interposed between the building frame and the foundation structure, so that horizontal stability is maintained. A plate-shaped piece embedded with 'IA E, ¥ is used to insulate the seismic force, and by separating it from the horizontal stability maintenance function provided by the horizontal spring, an inexpensive and highly durable seismic isolation device is constructed. It's Uruchino.

The invention according to claim 2 is characterized in that the horizontal spring is constituted by an air spring in which the bellows and the auxiliary tank are connected so that their internal spaces communicate with each other. Not only can a highly effective horizontal spring be obtained, but also the spring constant of the air spring can be controlled, and the desired vibration characteristics can be obtained with respect to the natural period of the building.

According to the third aspect of the present invention, the horizontal spring is constructed by binding a bundle of a plurality of steel rods with steel wires, so that large elastic deformation is possible, and at the same time, a vibration damping effect is obtained due to the friction between the steel rods. Moreover, in the event of a strong earthquake, the input seismic energy can be absorbed by the plastic deformation of the steel rod.

According to the fourth aspect of the invention, since the horizontal spring is made of a rubber block, a large elastic deformation can be obtained, the natural period of the building can be extended, and the horizontal seismic force can be reduced.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the seismic isolation device for a building according to the present invention, Fig. 2 is an enlarged longitudinal cross-sectional view of the main part, Fig. 3 is a longitudinal cross-sectional view explaining its operation, and Fig. 4 The figure is a perspective view of a plate-like piece in which steel balls are embedded, FIG. 5 is a vertical cross-sectional view showing the attachment part of the horizontal spring, FIG. 6 is a vertical cross-sectional view showing another embodiment of the present invention, and FIG. and FIG. 8 are a front view and a vertical sectional view showing the horizontal spring mounting part, respectively, and FIGS. 9, 10, and 11 are respectively
Arrow view IX-IX view, arrow view XX view, and arrow view X1-
FIG.
FIG. 14 is a front view of the horizontal spring, and FIG. 15 is a front view illustrating the action of the horizontal spring. Prisoner... Pillar, (Bl... Foundation, (Fl)
(F'l (F')...Horizontal spring, (1)...Plate piece, (2)...Steel ball, (5)...Viscous material, (8)...Steel rod , Q21...Rubber block. Agent: Patent attorney Shige Okamoto (1 person) Figure 9 Figure 10 Figure 14 Procedural amendment April 25, 1990

Claims (1)

[Claims] 1. A plate-shaped piece in which a plurality of steel balls are embedded in a rolling manner is provided in the gap between the pillars and the foundation of the building, and the gap is filled with or coated with a viscous material. Or, a seismic isolation device for a building, characterized in that it is filled with a surrounding plate and a horizontal spring is interposed between the building frame and the foundation structure. 2. The seismic isolation device for a building according to claim 1, wherein the horizontal spring is an air spring or an air spring with an auxiliary tank, and the air spring is attached to the building frame and foundation structure. 3. The building according to claim 1, wherein the horizontal spring is constituted by a bundle of a plurality of elongated steel bars bound together with steel wire, and both ends of the bundle are attached to the building and the foundation structure. Seismic isolation device. 4. The seismic isolation device for a building according to claim 1, wherein the horizontal spring is formed by attaching a rubber block to the building and the foundation structure.