JP2004332389A - Fire compartment structure for base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently secure the fire resisting performance of base isolation members at the time of mounting the base isolation members in a building and at the time of maintenance and inspection of the same. <P>SOLUTION: According to the fire compartment structure an intermediate story of the building is constructed as a base-isolation story on which a combustible F and columns 10 each having the base isolation member 30 mounted therein. A combustible existing space S1 in which the combustible F exists, is isolated from a base isolation member installation space S2 in which the columns 10 each having the base isolation member 30 are mounted, by a fire resisting member 50, and therefore without fire-resisting covering for each base isolation member 30, the plurality of base isolation members 30 are enclosed by the fire compartment in a lump in the base isolation member installation space S2. In this manner the fire resisting performance of the base isolation device is secured as a whole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fireproof technique for a seismic isolation device.
[0002]
[Prior art]
For buildings such as buildings, by installing a seismic isolation material such as a laminated damper between the building main body and the foundation, the seismic isolation material absorbs as much as possible the seismic isolation material and Seismic isolation technology is used to reduce the impact.
[0003]
In recent years, a structure in which an intermediate floor of a building or the like has a seismic isolation structure is required, and the above seismic isolation technique is also applied to such a structure.
[0004]
On the other hand, according to the Building Standard Law, in buildings such as buildings, fire resistance standards for structural materials such as walls and pillars are set for each floor in order to suppress damage during a fire.
[0005]
In a structure in which a seismic isolation material such as laminated rubber is provided between the building main part and the foundation part, it is usually unnecessary to assume the presence of combustible materials that may cause a fire in such a structural part. When applying seismic isolation technology to the middle floor of this building, the existence of combustible materials is naturally assumed, and the fireproof structure of the seismic isolation material is required accordingly.
[0006]
Conventionally, as a fireproof structure of such a seismic isolation material, a so-called fireproof coating method in which individual seismic isolation materials are individually surrounded by a fireproof material has been performed (see, for example, Patent Document 1).
[0007]
[Patent Document 1]
JP 2001-20506 A (see FIG. 5)
[0008]
[Problems to be solved by the invention]
However, the conventional method of performing fireproof coating for each seismic isolation material is extremely problematic in terms of workability of the fireproof coating, waterproofness, and maintenance and inspection of the seismic isolation material. The inventor has noticed.
[0009]
That is, a plurality of seismic isolation materials provided in a building such as a building are usually installed depending on the size of the building. Therefore, covering the seismic isolation material with a refractory material or the like requires covering work as many as the number of seismic isolation materials.
[0010]
In addition, it is difficult to apply fireproof coating to individual seismic isolation materials in a narrow space, which takes time and is inefficient. Such a point is directly reflected in the construction cost. The cost of fireproof construction per seismic isolation material is quite high, and the construction cost of the seismic isolation material is enormous in buildings of a certain size or larger that use a large number of seismic isolation materials, which increases the overall construction cost. It becomes one of.
[0011]
In addition, periodic maintenance management inspections are required for seismic isolation materials with fireproof coatings, and conventionally, the fireproof coatings are peeled off for each seismic isolation material, and the function check of laminated rubber of the seismic isolation materials inside is performed. Etc. Overlapping work in a narrow space overlaps, and maintenance and inspection work takes time and, of course, leads to an increase in maintenance costs.
[0012]
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 a waterproof problem that rain leaks from the slit part, and it is also necessary to solve this point is there.
[0013]
An object of the present invention is to ensure the fire resistance of a seismic isolation material efficiently in both construction and maintenance and inspection.
[0014]
Another object of the present invention is to achieve waterproofness in the seismic isolation slit through ensuring fire resistance of the seismic isolation material.
[0015]
[Means for Solving the Problems]
The present invention is a fireproof compartment structure of a seismic isolation device that protects a seismic isolation device provided in a building from a fire, and the seismic isolation device is located in the same floor space where there is a combustible material that can be a fire source of the building. There are a plurality of seismic isolation materials provided apart from each other, and the seismic isolation material installation space in which two or more seismic isolation materials are installed and the combustible material existence space in which the combustible material exists are in floor space In the seismic isolation material installation space and the combustible material existence space, at least one of the spaces is defined as a fireproof compartment, and the seismic isolation material installation space leads to the seismic isolation material installation space An entrance is provided.
[0016]
In the fireproof compartment structure of the seismic isolation device having the above-described configuration, all of the seismic isolation materials provided in the floor space where the combustible material exists are collectively surrounded by the fireproof compartment.
[0017]
In the fireproof compartment structure of the seismic isolation device, a plurality of fireproof compartments surrounding the seismic isolation material installation space are set in the same floor space.
[0018]
Further, in the fireproof compartment structure of the seismic isolation device of any one of the above configurations, in order to isolate the seismic isolation material installation space and the combustible material existence space by the fireproof material, the presence range of the combustible material is set to the floor. It is characterized by being enclosed by a fire-resistant member having a height that does not reach the ceiling from the floor side of the space.
[0019]
In this specification, the seismic isolation material refers to laminated rubber, a seismic isolation slit of a wall, and the like that are interposed between the upper structure and the lower structure including columns. In addition, the seismic isolation device refers to the entire device configured to exhibit a predetermined seismic isolation function by combining a plurality of such seismic isolation materials.
[0020]
DETAILED DESCRIPTION OF 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 the situation in which the present invention is applied to a seismic isolation device installation floor. FIG. 2 is a cross-sectional view showing a configuration of a slit joint material provided in the seismic isolation slit. FIG. 3 is a plan view schematically showing the state of FIG. 1 as viewed from above.
[0021]
In the following description, the configuration of the present invention will be described with an example in which the configuration is applied when an intermediate floor of a building or the like is configured as a seismic isolation floor. However, the application of the present invention is not necessarily limited to the application to such an intermediate seismic isolation floor, and can naturally be applied to the case where a seismic isolation device is provided between the building upper body part and the lower foundation part. .
[0022]
As shown in FIG. 1, seismic isolation structures are incorporated in each of a pillar 10 and an outer wall 20 on an intermediate floor of a building or the like. The column 10 includes an upper column body 10a and a lower column body 10b, and a laminated rubber seismic isolation material 30a is provided as a seismic isolation material 30 between the upper column body 10a and the lower column body 10b. .
[0023]
The laminated rubber seismic isolation material 30a includes, for example, a laminated rubber 31 in which a rubber plate such as a high damping rubber and a support plate such as a steel plate are alternately laminated between upper and lower flanges. It fixes to the body 10a side, and it is comprised so that a lower flange may be fixed to the lower pillar 10b side.
[0024]
In the case shown in the figure, the upper and lower flanges of the laminated rubber seismic isolation material 30a are provided by interposing the fixing plate 32a between the upper column body 10a and the fixing plate 32b between the lower column body 10b. The horizontal mounting accuracy can be secured.
[0025]
During an earthquake or the like, the laminated rubber 31 portion configured as described above absorbs vibration, and for example, vibration from the lower column body 10b side is not directly transmitted to the upper column body 10a side.
[0026]
As shown in FIG. 1, the fire-resistant outer wall 20 formed of a refractory material is composed of an upper wall body 20a and a lower wall body 20b, and is seismically isolated between the upper wall body 20a and the lower wall body 20b. A slit 21 is provided. The seismic isolation slit 21 is provided with a slit joint material 40.
[0027]
As shown in FIG. 2, the slit joint material 40 is configured such that a fire-resistant gasket 42 made of a gasket rubber 42 a formed in a pipe shape and a heat-sensitive foam material 43 are provided on a mounting base 41. Yes. In advance, the fireproof gasket 42 and the heat-sensitive foam material 43 are provided together on the mounting base 41 so as not to be independently constructed.
[0028]
In the construction of the slit joint material 40, the fireproof gasket 42 is made of rubber such as a gasket rubber 42a, for example, so that waterproofing for preventing rain leakage from the seismic isolation slit 21 portion is ensured together with ensuring fire resistance. Can be secured.
[0029]
That is, when the slit joint material 40 is used for the seismic isolation slit 21 of the outer wall 20, the outer wall 20 can be provided by providing the fireproof gasket 42 side on the outdoor side and the heat-sensitive foam material 43 side on the indoor side. Even if rain or the like sprays on the seismic isolation slit 21, sufficient waterproofness can be secured.
[0030]
As shown in FIG. 2, the heat-sensitive foam material 43 has an upper surface above the fire-resistant gasket 42 disposed adjacent to the fire-resistant material 44 provided in the frame member 41 a integrally formed on the mounting base 41 at a predetermined height. Is thinly provided in a layered manner so as to be low. With the slit joint material 40 interposed between the seismic isolation slits 21, a gap is formed between the heat-sensitive foam material 43 and the upper wall body 20a. The height H of the gap is set to such a height that the heat-sensitive foam material 43 is foamed and filled in a fire.
[0031]
Incidentally, the mounting base 41 including the frame member 41a may be formed of a metal such as aluminum that can withstand an assumed temperature at the time of a fire, or a material such as ceramic. For example, the refractory material 44 may be formed of calcium silicate, gypsum, ceramics, or the like.
[0032]
In the actual construction, the slit joint material 40 having such a configuration is attached as follows, for example. That is, when the lower wall body 20b is formed, a fixing rod 45 such as a reinforcing bar is passed through the wall body in the wall surface direction at a predetermined height in advance, and the anchor 46 is fixed thereto by welding or the like. So that the upper ends of the are aligned at a predetermined height.
[0033]
In this way, the anchor plate 47 whose upper surface is finished to be a plane with high accuracy is welded and fixed onto the plurality of anchors 46 provided on the fixing rod 45. After that, by pouring concrete mortar and providing the anchor plate 47 on the lower wall 20b with high accuracy, the mounting base 41 of the slit joint material 40 is provided on the lower wall 20b with high accuracy, and the height of the gap Construction management can be performed with high accuracy so that H does not become larger than necessary.
[0034]
For mounting the mounting base 41 on the anchor plate 47, a fixing means may be selected and used within a range in which conventionally known fire-resistant inconveniences such as bolt fixing and screw fixing do not occur.
[0035]
In the same floor space constituted by the column 10 and the outer wall 20 having the above-described configuration, a combustible F that can be a fire source is provided.
[0036]
In the same floor space, the side where the combustible F is installed and the side where the pillar 10 having the seismic isolation material is installed are partitioned by the fireproof member 50. That is, the fireproof member 50 functions as the fireproof partition wall 50a. As such a refractory member 50, use of a gypsum board, a rock wool spray wall, etc. can be considered, for example.
[0037]
In this way, the fireproof member 50 separates the so-called combustible material existence space S1 on the side where the combustible material F is installed from the seismic isolation material installation space S2 in which the laminated rubber seismic isolation material 30a is installed. Therefore, even if a fire occurs due to the combustible material F, the seismic isolation material installation space S2 side isolated by the refractory member 50 does not reach the fire and the seismic isolation mechanism of the building is protected from the fire. .
[0038]
Further, as shown in FIG. 1, the fireproof member 50 functioning as the fireproof partition wall 50a having the above-described configuration is provided with an inspection port 51a as an entrance 51 for going back and forth between the combustible material existence space S1 and the seismic isolation material installation space S2. It has been. The inspection port 51a is provided with a fire door 52 so that fire spread does not occur through the inspection port 51a in the event of a fire.
[0039]
FIG. 3 schematically shows such a configuration as viewed from above. As shown in the drawing, the seismic isolation material installation space S2 is partitioned by a fireproof partition wall 50a (50), and the outer wall 20 is configured to be fireproof together. Therefore, the base isolation material installation space S2 is configured as a fireproof partition. Will be.
[0040]
On the other hand, the combustible material existence space S1 with the combustible material F is also configured as a fireproof compartment by surrounding the outer wall 20 with the same fireproof outer wall 20 as surrounding the seismic isolation material installation space S2. For this reason, even if the combustible F becomes a fire source and a fire occurs, the fire damage such as the spread of fire does not reach the surroundings as much as possible.
[0041]
In addition, in the case shown in FIG. 1, the piping equipment 23 is provided through the partition penetration part 22 in the combustible existence space S1 side.
[0042]
In the case shown in FIG. 3, the case where the fireproof compartment is set in both the combustible material existence space S <b> 1 and the seismic isolation material installation space S <b> 2 is shown, but either the combustible material existence space S <b> 1 or the seismic isolation material installation space S <b> 2 is shown. Only one side may be configured as a fireproof compartment.
[0043]
For example, if only the combustible material existence space S1 is configured as a fireproof compartment, even if a fire occurs using the combustible material F as a fire source, the fire can be confined in the combustible material existence space S1 and configured as a fireproof compartment. It is possible to prevent the spread of fire to the seismic isolation material installation space S2, which is not performed, and to protect the seismic isolation mechanism of the building provided in the seismic isolation material installation space S2 from fire.
[0044]
Even if only the seismic isolation material installation space S2 is configured as a fireproof compartment, even if a fire is caused by the combustible material F in the combustible material existence space S1, the fire spread from the outside is prevented, and the seismic isolation mechanism part of the building Can be effectively protected from fire.
[0045]
1 and 3, since the inspection port 51a is provided in the fireproof partition wall 50a, the inspection port 51a is used in the seismic isolation material installation space S2 during normal times when no fire has occurred. The periodic inspection for the purpose of maintaining and managing the seismic isolation material 30 such as the laminated rubber seismic isolation material 30a provided on the pillar 10 can be performed.
[0046]
In such an inspection, it is not necessary to perform the inspection work while removing the fireproof coating for each seismic isolation material 30, and the inspection work is different from the conventional configuration in which the inspection work is performed while removing the fireproof coating for each individual seismic isolation material. Can be made much more efficient.
[0047]
In the configuration described above, a configuration in which a plurality of pillars 10 provided with the seismic isolation material 30 are collectively divided into the combustible material existence space S1 in a mode in which the same floor is divided into right and left by the fireproof member 50 is shown. In order to isolate the combustible part existence space S1 and the seismic isolation material installation space S2 by the member 50, other modes may be used.
[0048]
For example, in the case shown in FIG. 4, a configuration is shown in which a combustible material existence space S <b> 1 is partitioned on the center side in the same floor space of the seismic isolation floor, and a seismic isolation material installation space S <b> 2 is partitioned on both sides by fireproof members 50. ing. The fireproof member 50 may be provided with an inlet 51 that can be used as an inspection port 51a so that the combustible material existence space S1 and the seismic isolation material installation space S2 can be moved back and forth.
[0049]
In addition, as shown in FIG. 5, by providing a fireproof member 50 so as to surround the center of the combustible material F, a partition configuration is set in which a seismic isolation material installation space S2 is set around the combustible material existence space S1. It doesn't matter. The aspect of the partition configuration may be changed as appropriate depending on the arrangement configuration of the column 10 provided with the seismic isolation material 30 and the combustible F.
[0050]
In the above configuration, the refractory member 50 that separates the combustible material existence space S1 and the seismic isolation material installation space S2 is provided to extend vertically from the floor 11 to the ceiling 12 corresponding to the upper floor below. As shown in FIG. 6, the length of the refractory member 50 may be set short and the combustible F may be surrounded small.
[0051]
The present invention is not limited to the above-described embodiment, and may be changed as necessary without departing from the scope of the invention.
[0052]
In the above description, the fireproof section is set so that the seismic isolation material installation space includes a plurality of pillars, that is, includes a plurality of laminated rubber seismic isolation materials. However, although it is inferior, of course, it does not matter even if it sets a fireproof division so that one pillar provided with one laminated rubber seismic isolation material may be enclosed.
[0053]
【The invention's effect】
In the present invention, since it is not necessary to provide a fireproof coating for each seismic isolation material constituting the seismic isolation device, the construction work is less than the conventional construction in which fireproof construction is performed for each seismic isolation material. It is possible to reduce the fireproof construction cost of the seismic device.
[0054]
In addition, when inspecting seismic isolation materials, it is not necessary to remove the fireproof coating for each seismic isolation material, so maintenance and inspection of seismic isolation materials after fireproofing can be performed easily, and the maintenance and inspection costs are accordingly reduced. Reduction can be achieved.
[Brief description of the drawings]
FIG. 1 is a front view schematically showing an example of an embodiment of a configuration of the present invention.
FIG. 2 is a cross-sectional view showing a state of a slit joint material provided in a seismic isolation slit.
3 is a plan view schematically showing a state of the configuration shown in FIG. 1 as viewed from above. FIG.
FIG. 4 is a plan view schematically showing a modified example of the fireproof compartment in relation to the present invention.
FIG. 5 is a plan view schematically showing a modified example of the fireproof compartment in relation to the present invention.
FIG. 6 is a plan view schematically showing a modified example of the fireproof compartment in relation to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Column 10a Upper column body 10b Lower column body 20 Outer wall 20a Upper wall body 20b Lower wall body 21 Seismic isolation slit 22 Partition penetration part 23 Piping equipment 30 Seismic isolation material 30a Laminated rubber seismic isolation material 31 Laminated rubber 32a Fixing plate 32b Fixing Plate 40 slit joint material 41 mounting base 41a frame member 42 fireproof gasket 43 heat sensitive foam material 44 fireproof material 45 fixing rod 46 anchor 47 anchor plate 50 fireproof member 50a fireproof compartment wall 51 entrance 51a inspection port 52 fire door F combustible S1 Combustible material existence space S2 Seismic isolation material installation space

Claims (4)

A seismic isolation device fireproof compartment structure that protects the seismic isolation device provided in the building from fire,
The seismic isolation device has a plurality of seismic isolation materials provided apart from each other in the same floor space where a combustible material that can be a fire generation source of the building exists.
The seismic isolation material installation space where two or more seismic isolation materials are installed and the combustible material existence space where the combustible material exists are separated by a fireproof member in the floor space,
The seismic isolation material installation space and the combustible material existence space, at least one of the spaces is divided as a fireproof compartment,
A fireproof compartment structure for a seismic isolation device, wherein an entrance that leads to the seismic isolation material installation space is provided in the seismic isolation material installation space. In the fireproof compartment structure of the seismic isolation device according to claim 1,
All the seismic isolation materials provided in the floor space in which the said combustible material exists are enclosed by the said fireproof division collectively, The fireproof division structure of the seismic isolation apparatus characterized by the above-mentioned. In the fireproof compartment structure of the seismic isolation device according to claim 1,
A fireproof compartment structure for a seismic isolation device, wherein a plurality of fireproof compartments surrounding the seismic isolation material installation space are set in the same floor space. In the fireproof compartment structure of the seismic isolation device according to any one of claims 1 to 3,
In order to separate the seismic isolation material installation space and the combustible material existence space by the fireproof member, the existence range of the combustible material is surrounded by a fireproof member having a height that does not reach the ceiling from the floor side of the floor space. A fireproof compartment structure for seismic isolation devices, characterized by

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