JP2004332390A - Fire-resisting structure for base isolator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire resisting structure for a base isolator formed of a plurality of base isolation members, wherein the base isolation members are set up according to systematic fire resisting technique. <P>SOLUTION: According to the fire resisting structure, a laminated rubber base isolation member 20 is interposed between a lower column section 10a and an upper column section 10b, and the fire resisting member 14 is erected from the lower column section 10a in a manner enclosing the rubber laminated base isolation member 20. Further an inter-column base isolation slit 15 is formed between an upper edge of the fire resisting member 14 and the upper column section 10b. In the same manner a fire resisting wall 30 such as an outer wall on the periphery of the columns, is formed of a lower wall section 30a and an upper wall section 30b, and an inter-wall base isolation slit 31 is formed between the wall sections. Further the same slit joint member 50 is inserted into each of the inter-column base isolation slit 15 and the inter-wall base isolation slit 31. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fireproof coating technology for a seismic isolation device.
[0002]
[Prior art]
In buildings such as buildings, seismic isolation devices are provided as a measure against earthquakes in order to minimize shaking during an earthquake to the buildings. Such a seismic isolation device is composed of, for example, a combination of isolators represented by laminated rubber and the like, and individual seismic isolation materials such as seismic isolation slits provided on a wall such as an outer wall.
[0003]
By combining individual seismic isolation materials such as isolators and seismic isolation slits, it is possible to exert overall seismic isolation power that cannot be expected from individual seismic isolation materials alone.
[0004]
On the other hand, buildings such as buildings are required to be fully prepared for building fires. Naturally, there is also a demand for a fire countermeasure against a seismic isolation device made of such a combination of seismic isolation materials. For example, a configuration of a fireproof coating for a seismic isolation material made of laminated rubber or the like has been proposed (for example, see Patent Document 1). ).
[0005]
In this specification, the seismic isolation material refers to a laminated rubber or the like, a seismic isolation slit of a wall, or the like interposed between the upper structure and the lower structure including columns. In addition, the seismic isolation device refers to an entire structure configured to exert a predetermined seismic isolation function by combining a plurality of such seismic isolation materials.
[0006]
[Patent Document 1]
Japanese Patent No. 3079363 (see FIG. 1)
[0007]
[Problems to be solved by the invention]
Conventionally, a fire prevention measure for a seismic isolation device has been proposed, which is a so-called independent fireproof covering technology for individual seismic isolation materials such as laminated rubber, as described in Patent Literature 1. It is not a comprehensive fireproof coating technology for multiple constituent seismic isolation materials.
[0008]
Therefore, regarding the laminated rubber seismic isolation material provided on pillars etc., the construction surrounding the surroundings with fireproof material and fireproof covering is different from the fireproof construction related to seismic isolation materials such as seismic isolation slits provided on the outer wall etc. At present, the contractor is responsible for performing fireproof construction with different standards and constituent materials for each contractor.
[0009]
For this reason, for example, the seismic isolation material for columns and the like and the seismic isolation material for the seismic isolation slits on the wall, etc., have different fire resistance capabilities. It is highly likely that reasonable construction from a comprehensive point of view will not be performed, such as evaluation of the overall fire resistance of construction with low fire resistance. There has not yet been proposed a fire-resistant technology that uses a uniform standard for both laminated rubber and seismic isolation slits as seismic isolation materials from a comprehensive viewpoint.
[0010]
On the other hand, from a structural point of view, when a wall with a seismic isolation slit is installed on the outer wall as a seismic isolation material, it has been pointed out that there is a problem of waterproofness, in which rain leaks from the slit part, and this point is also resolved. It has been demanded.
[0011]
An object of the present invention is to provide a fireproof coating for a seismic isolation device with uniformity in the fireproof technology of seismic isolation materials such as laminated rubber and seismic isolation slits constituting the seismic isolation device.
[0012]
Another object of the present invention is to ensure waterproofness of a seismic isolation slit by ensuring fire resistance of the seismic isolation material.
[0013]
[Means for Solving the Problems]
The present invention is a fire-resistant structure of a seismic isolation device for a building, wherein the seismic isolation device is provided between an upper column and a lower column of a column of the building, and the periphery is erected from the lower column. A laminated rubber seismic isolation member surrounded by a fireproof member and provided with an inter-column seismic isolation slit between an upper end of the fireproof member and the upper column, and an upper wall and a lower wall of the fireproof wall of the building; A fire-resistant wall seismic isolation material provided with an inter-wall seismic isolation slit between them, and a common refractory slit joint material is interposed in both the inter-column seismic isolation slit and the inter-wall seismic isolation slit. It is characterized by having been done.
[0014]
In the fireproof structure of the seismic isolation device having the above-described configuration, the installation height of the inter-wall seismic isolation slit is set within a height range of the laminated rubber seismic isolation material.
[0015]
In the fire-resistant structure of the seismic isolation device having any of the above configurations, the fire-resistant slit joint material is provided by a mounting base, a fire-resistant gasket provided on the mounting base, and the fire-resistant gasket side by side with the fire-resistant gasket on the mounting base. And a heat-sensitive foam provided at a low height.
[0016]
As described above, by using a common fire-resistant slit joint material having the same member configuration, dimensional standard, etc., for the seismic isolation slits of both the laminated rubber seismic isolation material and the fire-resistant wall seismic isolation material, The seismic isolation mechanism of both the seismic isolation material and the fire-resistant wall seismic isolation material can be uniformly coated with a member having the same fire resistance. Compared to the case where different fireproof slit joints are applied to each of the seismic isolation slits of the seismic isolation laminated rubber seismic isolation material and fire wall isolation material, there is no difference in the fire resistance function of each seismic isolation material, and a certain level of fire resistance Performance can be ensured, and also from the viewpoints of workability, maintainability of the seismic isolation mechanism, and the like, labor can be reduced and cost can be reduced.
[0017]
Further, if a rubber fire-resistant gasket is used for the slit joint material, it is possible to prevent rainwater from entering from the seismic isolation slit between the walls, and to secure fire resistance and waterproofness at the same time.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view schematically showing a case where the present invention is applied to a seismic isolation device installation floor of a building such as a building. FIG. 2 is an explanatory diagram schematically showing the relationship between both the laminated rubber seismic isolation material and the fire-resistant wall seismic isolation material. FIG. 3 is a plan view schematically showing the configuration of FIG. 1 as viewed from above.
[0019]
In the following description, a seismic isolation device A applied to a seismic isolation structure on an intermediate floor of a building such as a building will be described as an example. Of course, the seismic isolation device A to which the present invention is applied is provided not only between the seismic isolation floor on the intermediate floor, but also between the main body of the building as the upper structure and the foundation of the building as the lower structure. It may be something that can be done.
[0020]
In the case shown in FIG. 1, the seismic isolation device A is composed of a laminated rubber seismic isolation material 20 related to the seismic isolation structure of the pillar 10 and a fire-resistant wall seismic isolation material 40 related to the seismic isolation structure of the fire-resistant wall 30. ing.
[0021]
As shown in FIG. 1, the pillar 10 is composed of a lower pillar 10a raised from the floor 11 of the seismic isolation device installation floor and an upper pillar 10b lowered from the ceiling 12 corresponding to the lower floor of the upper floor. I have. A laminated rubber seismic isolation member 20 is provided between the lower columnar member 10a and the upper columnar member 10b as a seismic isolation member.
[0022]
For example, as shown in FIG. 2, the laminated rubber seismic isolation material 20 is formed by alternately laminating a rubber plate such as a high damping rubber and a support plate such as a steel plate between a lower flange 21 a and an upper flange 21 b. What is necessary is just to use the thing provided with the laminated rubber 22, fixing the lower flange 21a to the lower column 10a side, and fixing the upper flange 21b to the upper column 10b side.
[0023]
In the case shown in the drawing, the fixing plate 13a is interposed between the lower column 10a and the fixing plate 13b is interposed between the lower column 10a and the flange 21a of the laminated rubber seismic isolation material 20, The horizontal mounting accuracy of 21b is configured to be ensured.
[0024]
In the event of an earthquake or the like, vibration is absorbed by the laminated rubber portion 22 having the above-described configuration, so that, for example, vibration from the lower column 10a is not directly transmitted to the upper column 10b.
[0025]
As shown in FIG. 2, a fireproof member 14 is provided upright from the lower pillar 10 a so as to surround the periphery of the laminated rubber seismic isolation member 20. The upper end of the refractory member 14 is set so as not to reach the fixing plate 13b of the upper column 10b, and an inter-column seismic isolation slit 15 is formed between the refractory member 14 and the upper column 10b.
[0026]
The refractory member 14 is formed of, for example, an ALC plate, a PC plate, a gypsum board plate, a calcium silicate plate, a metal plate, or a refractory glass plate, and is provided so as to surround four sides of the laminated rubber seismic isolation material 20. . A part of the refractory member 14 surrounding the four sides is provided so as to be removable, and is configured so that the state of the laminated rubber 22 being removed can be inspected during the periodic inspection of the laminated rubber seismic isolation material 20.
[0027]
As shown in FIG. 3, the pillars 10 having such a configuration are provided, for example, at four corners of the seismic isolation device installation floor, slightly away from the fireproof wall 30 as the building outer wall.
[0028]
On the other hand, the fireproof wall 30 is configured as an outer wall of a building that separates an inner space and an outer space of the building, and is formed in a plate shape such as a rock wool sprayed PC board, for example. As shown in FIG. 1, the fire-resistant wall 30 having such a configuration includes a lower wall 30 a raised from the floor 11 side of the seismic isolation device installation floor and an upper wall lowered from the ceiling 12 below the upper floor. An inter-wall seismic isolation slit 31 is formed between the lower wall 30a and the upper wall 30b.
[0029]
That is, the lower wall 30a, the upper wall 30b, and the inter-wall seismic isolation slit 31 constitute the fire-resistant wall seismic isolation material 40.
[0030]
The inter-wall seismic isolation slits 31 are provided so as to be within the height range of the laminated rubber 22 of the laminated rubber seismic isolation material 20. In FIG. 1, as an example, the height is adjusted to the installation height of the inter-column seismic isolation slit 15 provided between the refractory member 14 surrounding the periphery of the laminated rubber seismic isolation material 20 having the above configuration and the upper column 10 b. I have.
[0031]
On the other hand, a slit joint member 50 shown in FIG. 4 is interposed between the inter-column seismic isolation slit 15 and the inter-wall seismic isolation slit 31. FIG. 4 shows a state of a short section of the fire-resistant wall 30, in which a slit joint material 50 is provided in the inter-wall seismic isolation slit 31 formed between the lower wall 10 a and the upper wall 10 b. showed that.
[0032]
The slit joint member 50 is configured such that a refractory gasket 52 made of a gasket rubber 52a formed in a pipe shape and a heat-sensitive foam material 53 are provided on a mounting base 51. In advance, the refractory gasket 52 and the heat-sensitive foam material 53 are provided together on the mounting table 51 so that it is not necessary to separately construct them.
[0033]
In the construction of the slit joint material 50, rubber is used as the fire-resistant gasket 52, for example, a gasket rubber 52 a, so that the waterproof property for preventing the leakage of rain from the seismic isolation slit 31 between the walls is improved. It can be secured together with securing.
[0034]
That is, when the slit joint material 50 is used for the inter-wall seismic isolation slit 31, if the fire-resistant gasket 52 is provided so as to be on the outdoor side and the heat-sensitive foam material 53 is provided so as to be on the indoor side, Even when the inter-base seismic isolation slit 31 is applied to the fire-resistant wall 30 as an outer wall, it is possible to sufficiently secure waterproofness against rain or the like blown from the inter-wall seismic isolation slit 31 part.
[0035]
As shown in FIG. 4, the heat-sensitive foam material 53 is formed by a refractory gasket 52 disposed adjacently on a refractory material 54 provided in a frame member 51a integrally formed on the mounting table 51 at a predetermined height. It is provided in a thin layer so that the upper surface becomes lower. With the slit joint member 50 interposed between the inter-wall seismic isolation slits 31, a gap is formed between the heat-sensitive foam 53 and the upper wall 30b. The height H of the gap is set to such a height that the heat-sensitive foam 53 is foamed and filled in the event of a fire.
[0036]
Incidentally, the mounting base 51 including the frame member 51a may be formed of a metal such as aluminum or a material such as ceramic that can withstand the expected temperature at the time of fire. The refractory material 54 may be formed of, for example, calcium silicate, gypsum, ceramics, or the like.
[0037]
At the time of actual construction, the slit joint member 50 having such a configuration is attached, for example, as follows. That is, when the lower wall 30a is formed, a fixing rod 55 of a reinforcing bar or the like is passed through the wall in advance along the wall surface to a predetermined height, and the anchor 56 is fixed thereto by welding or the like. So that the upper end of the is aligned with the predetermined height.
[0038]
An anchor plate 57 whose upper surface is finished with high accuracy and flatness is fixed by welding onto the plurality of anchors 56 provided on the fixing rod 55 in this manner. After that, the concrete mortar is poured, and the anchor plate 57 is provided on the lower wall 30a with high accuracy, so that the mounting base 51 of the slit joint material 50 is provided on the lower wall 30a with high accuracy, and the height of the gap is increased. Construction management can be accurately performed so that H does not become unnecessarily large.
[0039]
Attachment of the mounting base 51 to the anchor plate 57 may be performed by selecting and using fixing means within a range in which conventionally known inconvenience on fire resistance such as bolt fixing and screw fixing does not occur.
[0040]
On the other hand, the slit joint material 50 having the above-described structure is provided between the upper pillar 10b and the fireproof member 14 surrounding the laminated rubber seismic isolation material 20 provided between the lower pillar 10a and the upper pillar 10b. It is also interposed in the formed seismic isolation slit 15 between the columns.
[0041]
As described above, in the present invention, the seismic isolation slits are provided in both the laminated rubber seismic isolation material 20 and the fire-resistant wall seismic isolation material 40, and the common slit joint material 50 having the same member configuration is provided in the seismic isolation slits. Is provided.
[0042]
When the common slit joint material 50 is interposed between the two seismic isolation slits, when the width of the inter-column seismic isolation slit 15 and the width of the inter-wall seismic isolation slit 31 are the same, both have the same member configuration and The slit joint member 50 having the same size may be used. However, when the thickness of the refractory member 14 is different from the thickness of the refractory wall 30, the member configuration is the same and only the dimensional standard is different. It does not matter even if the one configured as above is used.
[0043]
In the above description, as shown in FIG. 3, as an example, the column 10 is provided away from the fire-resistant wall 30 formed on the outer wall of the seismic isolation device installation floor, but as shown in FIG. Alternatively, a configuration provided in contact with the outer wall may be used. Further, as shown in FIG. 5 (B), the inter-wall seismic isolation slit 31 may be provided in the partition wall 32 in addition to the outer wall.
[0044]
The present invention is not limited to the above-described embodiment, and may be changed as needed without departing from the gist thereof.
[0045]
【The invention's effect】
In the present invention, since the slit joint material having the common fire resistance is used for the seismic isolation slit between the columns and the seismic isolation slit between the walls, a certain fire resistance of the seismic isolation slit portion can be secured, and From the viewpoints of workability, waterproofness, maintainability of the seismic isolation mechanism, etc., it is possible to reduce costs without labor.
[Brief description of the drawings]
FIG. 1 is a front view schematically showing an example in which the present invention is applied to a floor where a seismic isolation device is installed.
FIG. 2 is an explanatory diagram schematically showing a configuration in which a slit joint material having the same configuration is passed through a seismic isolation slit between columns and a seismic isolation slit between walls.
FIG. 3 is a plan view schematically showing a state in which the arrangement relationship between the pillars and the refractory wall in the configuration of FIG. 1 is viewed from above.
FIG. 4 is an explanatory view showing a configuration in which a slit joint material is interposed in a seismic isolation slit between walls.
FIGS. 5A and 5B are plan views showing a modification of the positional relationship between the pillars and the refractory wall when the present invention is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Column 10a Lower pillar 10b Upper pillar 11 Floor 12 Ceiling 13a Fixing plate 13b Fixing plate 14 Fireproof member 15 Seismic isolation slit between pillars 20 Laminated rubber seismic isolation material 21a Flange 21b Flange 22 Laminated rubber 30 Fireproof wall 30a Lower part Wall body 30b Upper wall body 31 Wall-to-wall seismic isolation slit 32 Partition wall 40 Fireproof wall seismic isolation material 50 Slit joint material 51 Mounting base 51a Frame member 52 Fireproof gasket 53 Heat sensitive foam material 54 Fireproof material 55 Fixing rod 56 Anchor 57 Anchor plate A seismic isolation device

Claims (3)

The fireproof structure of the seismic isolation device of the building,
The seismic isolation device is
A pillar is provided between an upper pillar and a lower pillar of the building, and the periphery is surrounded by a fireproof member standing upright from the lower pillar, and a pillar is provided between an upper end of the fireproof member and the upper pillar. Laminated rubber seismic isolation material with interbody seismic isolation slits,
A fire-resistant wall seismic isolation material having an inter-wall seismic isolation slit between the upper wall and the lower wall of the fire-resistant wall of the building,
A fireproof structure of a seismic isolation device, wherein a common fireproof slit joint material is interposed in both the inter-column seismic isolation slit and the inter-wall seismic isolation slit. The fireproof structure of the seismic isolation device according to claim 1,
The installation height of the inter-wall seismic isolation slit is set within a height range of the laminated rubber seismic isolation material, wherein the fireproof structure of the seismic isolation device is provided. The fireproof structure of the seismic isolation device according to claim 1 or 2,
The refractory slit joint material has a mounting base, a refractory gasket provided on the mounting base, and a heat-sensitive foam material provided on the mounting base alongside the refractory gasket at a height lower than the refractory gasket. A fire-resistant structure of the seismic isolation device.

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