JPH03107075A - Earthquake-and dire-proof structure of bulding - Google Patents

Abstract

PURPOSE:To secure fire-proof property by surrounding a whole outer periphery of an earthquake-proof elastic body with a deformable coating material and housing a deformable heat insulating material between the coating material and the earthquake-proof elastic body. CONSTITUTION:An earthquake-proof elastic body 3 is provided between a building 1 and a pillar 2. A whole outer periphery of the earhtquake-proof elastic body 3 is surrounded by a bellows-like coating material 21 which can be deformed according to elastic deformation of the elastic body 3. Further a heat insulating material 22 is put between the earthquake-proof elastic body 3 and the coating material 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a building supported by a plurality of pillars provided with a seismic isolation elastic body, and particularly to its seismic isolation and fireproof structure.

[Conventional technology] In recent years, in structures 1 such as buildings,
As shown in FIG. 6, a seismic isolation elastic body 3 made of rubber or the like is interposed between the upper and lower divided portions 2a and 2b of the plurality of columns 2 that support the building l, and the upper and lower portions of the elastic body 3 are The upper and lower divided portions 2 of the column 2 are connected via the flange portions 4 provided on both sides.
a, 2b, as shown in Figure 6.
The building 1 is prevented from collapsing by absorbing the lateral shaking caused by the earthquake by the seismic isolation elastic body 3.

[Problems to be Solved by the Invention] By the way, conventional seismic isolation elastic bodies have generally only been installed between buildings and foundations, and therefore have not been required to have fire resistance. However, in recent years, in order to make effective use of the site, seismic isolation elastic bodies are installed between main structures such as column heads and column bases on each floor of a building to create a seismic isolation structure for any floor above. , it is required that the seismic isolation structure itself be covered with a fire-resistant coating to provide a fire-resistant performance equal to or higher than the prescribed fire-resistant performance stipulated in the Building Standards Act. For example, for a heating test in which the structure is heated to 1050°C for two hours and then allowed to cool, it is necessary that the seismic isolation structure does not lose its design strength performance such as earthquake resistance. Ru.

This invention was made in consideration of the above circumstances, and its purpose is to
To provide a seismic isolation fireproof structure for a building that can cover a seismic isolation elastic body and ensure its fire resistance.

[Means and operations for solving the problem] In order to achieve the above object, in the present invention, in a building supported by a plurality of pillars provided with a seismic isolation elastic body, the outer circumferential surface of the seismic isolation elastic body The whole is surrounded by a sheathing material that can be deformed according to the elastic deformation of the seismic isolation elastic body, and there is a space between the sheathing material and the seismic isolation elastic body that deforms according to the deformation of the seismic isolation elastic body and the sheathing material. Contains possible insulation.

Therefore, the seismic isolation elastic body is covered with a covering material and a heat insulating material, and the required fire resistance of the seismic isolation elastic body is ensured. Further, when the seismic isolation elastic body is deformed due to lateral shaking caused by an earthquake, the covering material and the heat insulating material are deformed accordingly.

[Example] Hereinafter, a first example embodying the present invention will be described in detail with reference to FIG.

A flexible and heat-resistant stainless steel plate is formed into a bellows shape between the upper and lower flange portions 4 so as to surround the outer peripheral surface of the elastic body 3 at a predetermined interval. A covering material 21 is attached. Between the covering material 21 and the seismic isolation elastic body 3 is filled a heat insulating material 22 made of aluminous silica-based seracus fiber. The heat resistant temperature of the covering material 21 is 1100°C. Moreover, the heat insulating material 2
2 is Super Bulk (product name) manufactured by IBIDEN Co., Ltd.
It contains 02.52% 3i and 203.48% AI, has an average fiber diameter of 2 μm, a bulk specific gravity of 0.2 g/cd, and a heat resistance temperature of 1260°C.

The above-mentioned covering material 2l and heat insulating material 22 are used when constructing a building.
Alternatively, when the support column 2 is exposed due to underground construction to construct a parking lot or the like, it is attached to the seismic isolation elastic body 3. Therefore, the fire resistance of the seismic isolation elastic body 3 can be ensured by both 21 and 22. Furthermore, even when a lateral shake occurs due to an earthquake, the covering material 21 and the heat insulating material 22 can be deformed in accordance with the deformation of the seismic isolation elastic body 3, so that they will not accidentally fall from the support column 2.

As for the covering material 21, as shown in FIG.
By expanding the central portion outward, it may be deformed in accordance with the deformation of the seismic isolation elastic body 3.

Next, to explain the second embodiment, Fig. 3(a),
As shown in (b), the covering material 3l is composed of a cloth woven from twisted threads made of ceramic bulk fiber (CF), flame-retardant cotton fiber, and iron-chromium wire core wire. As in the first embodiment, it is fixed to the flange portion 4 at both its upper and lower edges. The covering material 31 has the characteristics shown in the table below.

Thickness Basis Weight Tensile Strength Heat Resistant Temperature 21l lkg/rrf 30k+r/an! 1100°C The heat insulating material 32 is made of a mixture of 90 parts by weight of alumina-silica-based Cera 5 Fuchs fibers of the same composition as that used in the first embodiment, 8 parts by weight of an inorganic binder and 2 parts by weight of an organic binder. It is shaped like a ring using the material.

To form the heat insulating material 32, first, each of the above-mentioned materials is mixed with water and the ceramic fibers are defibrated to prepare a slurry having a concentration of about 1% by weight. Next, this slurry is fed into a vacuum suction mold to be shaped into a pipe, and then dried to prevent the shaped product from being deformed. Then cut into rings. In addition, at that time, a third
As shown in Figure (C), in order to prevent wear of each heat insulating material 32 during deformation and to improve sliding properties, metal such as stainless steel is used in consideration of thermal conductivity (heat bridge). The wear prevention plate 33 may be fixed with adhesive or may be coated with a ceramic coating agent (manufactured by IBIDEN Co., Ltd., trade name: IBICOAT).

In this embodiment, the plurality of heat insulating materials 32 are arranged on the outer periphery of the seismic isolation elastic body 3 inside the sheathing material 31 so as to be in sliding contact with each other between the two flanges 4 so as to be able to move relative to each other. There is.

In addition, as a method of arranging the heat insulating material 32 cut into a ring shape around the outer periphery of the seismic isolation elastic body 3, when both the flanges 4 are integrally formed with the seismic isolation elastic body 3, for example, The ring-shaped heat insulating material 32 may be divided into two parts and placed around the seismic isolation elastic body 3, and then each divided part may be adhesively fixed with a high-temperature fire-resistant adhesive (manufactured by IBIDEN Co., Ltd., trade name: IBIDINE). good.

Therefore, also in the second embodiment, fire resistance can be imparted to the seismic isolation elastic body 3. Further, as shown in FIG. 3(b), when a horizontal shaking occurs due to an earthquake, a positional shift occurs between the upper and lower divided portions 2a and 2b of each column 2, and the seismic isolation elastic body 3 is deformed. In accordance with the deformation, the heat insulating material 32 moves in the horizontal direction, and the covering material 31 deforms.

Therefore, even in the event of an earthquake, the seismic isolation elastic body 3 can be maintained in a covered state, and damage to the heat insulating material 32 itself can be prevented. Also, metal wear prevention plates 33 are provided on both end surfaces of the heat insulating material 32.
Since the heat insulating material 32 is bonded to the heat insulating material 32, wear caused by movement of the heat insulating material 32 can be prevented.

It should be noted that the present invention is not limited to the composition and shape of the heat insulating materials in each of the embodiments described above, and these can be changed as appropriate.

[Effects of the Invention] As detailed above, the present invention has the excellent effect that even when a support column is exposed in a building space, it can be covered with a seismic isolation elastic body to ensure its heat resistance. Demonstrate.

[Brief explanation of drawings]

FIG. 1 is a partial front view of a support column in a first embodiment embodying this invention, FIG. 2 is a partial front view showing a modified example, and FIG.
Figure (a) is a partial front cross-sectional view of the support column in the second embodiment, Figure 3 (b) is a partial front cross-sectional view also during rolling, Figure 3 (c) is an enlarged cross-sectional view of the heat insulating material, The figure is an explanatory diagram of the building, FIG. 5 is a partial front view showing the attachment portion of the seismic isolation elastic body of the support column, and FIG. 6 is a partial front view of the building during horizontal shaking. 1... Building, 2... Support column, 3... Seismic isolation elastic body,
21.31... Covering material, 22.32... Heat insulation material.

Claims (1)

[Claims] 1 In a building (1) supported by a plurality of columns (2) provided with a seismic isolation elastic body (3), the seismic isolation elastic body (
3) is surrounded by a sheathing material (21, 31) that can be deformed according to the elastic deformation of the seismic isolation elastic body (3), and the sheathing material (21, 31) and the seismic isolation elastic body (
3), there is a seismic isolation elastic body (3) and a covering material (21, 3
1) A seismic isolation and fireproof structure for a building, characterized by housing a heat insulating material (22, 32) that can be deformed according to the deformation of the structure.