JP3298849B2 - Fire resistant structure of seismic isolation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof structure in a seismic isolation structure such as an installation part of a seismic isolation device for a building or a formation part of a seismic isolation slit in a wall.

[0002]

2. Description of the Related Art Conventionally, seismic isolation devices such as laminated rubber are generally installed between a lower part of a structure such as a building and a foundation. It may be installed between main structures such as between columns and bases, and seismically isolated structures above arbitrary floors may be used. In such cases, the seismic isolation structure is required to have a fire-resistant structure for disaster prevention, but since the seismic isolation device itself is not a fire-resistant structure, make sure that this part does not impair the seismic isolation function. However, it is necessary to add a new structure having fire resistance performance.

Conventionally, as a structure for imparting fire resistance to a seismic isolation structure, for example, as shown in FIG. 7, for example, as shown in FIG. 7, a seismic isolation device using laminated rubber disposed between columns 1a and 1b as upper and lower structures. The periphery of 3 is surrounded by a refractory coating 14 made of a ceramic fiber blanket or the like, and the end of the refractory coating 14 is fixed to the pillars 1a, 1b and the like with bolts 15.

Further, as described in Japanese Patent Application Laid-Open No. 10-227154, a fire-resistant covering material surrounding the seismic isolation device is constituted by a vertically divided cylindrical body, and a seismic isolation slit is provided between the upper and lower fire-resistant coating materials. Even if it is a structure in which a fireproof covering material is inserted into this seismic isolation slit, the upper and lower fireproof coating materials and the fireproof coating material to be inserted into the seismic isolation slit are formed of a fireproof fiber blanket such as ceramic fiber. ing.

The seismic isolation structure of a structure such as a building includes not only the above-described location of the seismic isolation device 3 but also a seismic isolation slit 6 formed on a wall 7 such as an outer wall or a partition wall as shown in FIG. Is also a seismic isolation structure. When a fireproof section is to be formed at the location of the seismic isolation structure, the ceramic fiber is made to cover the seismic isolation slit 6 in the same manner as in the case of the seismic isolation device 3. It is necessary to attach a fireproof covering material 14 such as a blanket made of steel.

[0006]

The fireproof covering material 14 made of a ceramic fiber blanket or the like is fibrous, but the actual material is thick, and the internal seismic isolation device 3 is inspected when the fireproof covering material 14 is attached. Can not be performed, it is necessary to remove it for inspection, which is troublesome.

Also, since the appearance is similar to a cushion, for example, the appearance is not good. Especially when used for a seismic isolation slit 6 formed on a wall or the like, a decorative panel or the like is used while securing clearance for seismic isolation. The refractory coating material 14 is separately covered and hidden, and a member such as a decorative panel is separately required. This not only increases the cost but also requires a work process for mounting the panel.

Furthermore, the blanket made of ceramic fiber is susceptible to water because of its material, which makes it difficult to use it on the outer wall or outside of a building. May be high.

[0009] In order to solve such a problem, the applicant has disclosed a fireproof structure in a seismic isolation structure as disclosed in Japanese Unexamined Patent Publication No.
The one described in JP-A-11-22062 was previously proposed. For example, as shown in FIG. 9, in a seismic isolation structure formed by installing a seismic isolation device between, for example, vertically divided columns or the like, the upper and lower structures are arranged so as to surround the seismic isolation device. A fireproof plate 16 made of a PC board or the like is attached to the structure so that a seismic isolation slit 6 is formed between the fireproof plates, and a hollow fireproof gasket 17 having a fireproof performance and a graphite-based foam material are formed in the seismic isolation slit 6. The foam material 18 that foams by heat is inserted.

However, the seismic isolation slit 6 as described above is used.
The structure in which the refractory gasket 17 and the foam material 18 are inserted side by side is intended for a refractory plate 16 made of a PC board or the like having a large mounting surface, for example, a thickness of about 100 mm. As a result, the weight of the plate 16 itself and the dimensions of the pillars become large. As a result, it is difficult to sufficiently eliminate the difficulty of maintenance and the like, and the pillars have a large appearance.

Also, a seismic isolation slit 6 formed in an outer wall or the like.
As shown in Fig. 10, seismic isolation slits 6
A mortar joint 20 is constructed inside the outer wall 13 located below the mortar joint, and a fire-resistant plate 16 made of a PC board is provided inside the outer wall 13 located above the seismic isolation slit 6 so as to face the mortar joint 20. Attach the seismic isolation slit 6 and the gap between the mortar joint 20 and the fireproof plate 16 to the fireproof gasket 17 and foam material.
Since the structure is such that 18 are arranged side by side, the wall becomes fluffy than a normal surface, and the space efficiency is reduced. In the figure, reference numeral 19 denotes a draining plate.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the disadvantages of the prior art, and to provide a fireproof function with a simple structure without impairing the seismic isolation function in a seismic isolation structure provided with a seismic isolation device. It can be easily inspected at the place where the seismic isolation device is installed, and the thickness of the fireproof plate can be made thin and lightweight, the appearance size of the pillars does not increase, the appearance is good, and the seismic isolation slit on the wall It is an object of the present invention to provide a fireproof structure in a seismic isolation structure that can be easily applied without using a fireproof plate and can form a fireproof compartment, and can be applied to an existing building.

[0013]

According to the present invention, in order to achieve the above object, firstly, a seismic isolation device is installed between structures such as columns divided vertically and between structures and a foundation. In the seismic isolation structure formed in this way, fireproof plates are attached from the upper and lower structures and foundations so as to surround the seismic isolation device, and seismic isolation slits are formed between the vertical fireproof plates, and the ceramic fiber A fire-resistant gasket filled with fire-resistant fibers such as the above is inserted into the seismic isolation slit, and the gap between the lower fire-resistant plate and the lower structure is heated while maintaining air permeability and water permeability. The gist of the present invention is that a foaming material that is foamed by the method is mounted.

Second, in the gap between the upper structure and the upper refractory plate, a refractory gasket and a fiber blanket made of a refractory fiber such as a ceramic fiber are arranged and inserted. is there.

According to the first aspect of the present invention, a seismic isolation slit is formed by a fireproof plate attached around a location where the seismic isolation device is installed, and a fireproof fiber such as a ceramic fiber is formed inside the seismic isolation slit. The fireproof function can be easily added to the seismic isolation function simply by inserting the filled fireproof gasket. Since the fire-resistant fiber is packed in the hollow inside of the fire-resistant gasket as described above, the fire-resistant fiber can be prevented from directly contacting water, and a decorative panel is not required. In addition, the overall capacity of the members to be inserted into the seismic isolation slits is reduced, the thickness of the fireproof plate can be reduced, and the appearance is improved.
Maintenance can also be easily performed without using machinery.

[0016] Further, since a foamed material which is foamed by heat is mounted in the gap between the lower fireproof plate and the lower structure while ensuring air permeability and water permeability, the air permeability is usually provided. As a result, internal dew condensation can be prevented, and seismic isolation devices can be prevented from rust. Further, since the foam material expands in the event of a fire and closes the gap, it is possible to prevent the flame and the hot air flow from entering the seismic isolation device.

According to the second aspect of the present invention, in addition to the above-described functions, the gap between the upper structure and the upper refractory plate is provided with a refractory gasket and a fiber made of a refractory fiber such as a ceramic fiber. By arranging and inserting blankets, for example, it is not necessary to use a fireproof seal made of PTFE (Teflon) sheet or the like as in the past, and it is not necessary to remove the fireproof seal and remove the fireproof plate at the time of inspection or the like. In addition to improving the workability, the use of a refractory gasket or a fiber blanket made of refractory fibers is possible, and material can be saved.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional front view of a seismic isolation slit portion showing an embodiment of a fireproof structure in a seismic isolation structure of the present invention, FIG. 2 is a longitudinal sectional front view of a gap between an upper fireproof plate and an upper structure, and FIG. FIG. 7 is a vertical sectional front view of a gap between the upper and lower refractory plates and the lower structure. In the drawings, the same components as those in the conventional example shown in FIGS. 7 to 10 are denoted by the same reference numerals.

The present invention relates to an upper structure such as RC (reinforced concrete) columns 1a and 1b which are divided into upper and lower parts as shown in FIG. 4, a laminated rubber between lower structures, and between a structure and a foundation. , And upper and lower structures such as RC (reinforced concrete) columns 1a and 1b which are vertically divided as shown in FIG. The seismic isolation structure formed by installing the seismic isolation device 3 with a spherical sliding bearing between the structure and the foundation is implemented.

In this seismic isolation structure, as shown in FIG. 6, the upper and lower structures RC (reinforced concrete) columns 1a and 1b are connected to the fireproof plate 2a so as to surround the seismic isolation device 3 in a rectangular shape. , 2b so as to be vertically opposed to each other, a seismic isolation slit 6 is formed between the upper and lower refractory plates 2a, 2b, and each of the horizontally adjacent refractory plates 2a, 2b is formed.
b denotes a joint corner, which is joined by using the mounting hardware 4 made of an angle material.

Each of the refractory plates 2a and 2b is made of, for example, a calcium silicate plate, a fiber blanket hard board, a glass fiber reinforced cement (GFRC) plate or the like, and has a thickness of 50 m.
Use a thin plate of about m.

As a refractory material that can be inserted into the seismic isolation slit 6 between the thin refractory plates 2a and 2b, as shown in FIG. 1, a refractory gasket 8 in which a refractory fiber 9 such as a ceramic fiber is packed in a hollow interior is used. I inserted it. In the figure, reference numeral 5 denotes a peripheral wall-shaped projection projecting downward from the lower outside of the upper refractory plate 2a. The refractory gasket 8 comes into contact with the inside of the projection 5 so that the refractory gasket 8 is protruded. 5
And is held by the seismic isolation slit 6.

The pillar 1a as the upper structure and the upper refractory plate 2
It is necessary to provide the gap 11 with a fire-resistant function also in the gap 11, but at this point, as shown in FIG. 2, a fire-resistant gasket 17 and a fiber blanket 10 made of fire-resistant fiber such as ceramic fiber are inserted side by side. I do. In this case, the fiber blanket 10 is arranged on the inside on the side of the seismic isolation device 3, and the refractory gasket 17 is arranged on the outside.

A pillar 1b as a lower structure and a lower refractory plate 2
b, it is necessary to ensure the inner coating state covered with the fireproof plates 2a and 2b on fire resistance, but also to ensure air permeability to prevent internal dew condensation.

Therefore, as shown in FIG. 3, a water gradient is formed on the upper surface of the pillar 1b, which is a lower structure, and is inclined downward toward the outside, and a drain is provided between the pillar 1a and the refractory plate 2b. A gap 11 of about 5 mm, which also serves as an air hole, was provided, and a foam material 18 which foams by heat was adhered to the lower surface of the refractory plate 2b at the location of the gap 11 using an adhesive or the like. in this case,
Even when the foam material 18 is stuck, the gap 11 is not completely closed. As the foam material 18, for example, a graphite foam material or a carbon graphite foam material is used.

Next, the operation will be described. Fireproof plates 2a and 2b are arranged around the seismic isolation device 3. The fireproof plates 2a and 2b are divided into a column 1a side as an upper structure and a column 1b side as a lower structure. Upper and lower refractory plates 2a, 2
Since the seismic isolation slit 6 is formed between b, the vibration is absorbed by the seismic isolation slit 6 when an earthquake occurs, and the fireproof plates 2a and 2b do not impair the function of the seismic isolation device 3. After the earthquake has subsided, the periphery of the seismic isolation device 3 is covered again with these fireproof plates 2a and 2b.

A fireproof gasket 8 is inserted into the seismic isolation slit 6, which is used when the earthquake occurs.
The gasket 8 is deformed following the movement of the refractory gaskets 8 and does not hinder the movement of the refractory plates 2a and 2b.

Further, since a gap 11 is provided between the lower refractory plate 2b and the pillar 1b, the air permeability is normally ensured and internal dew is prevented. Even if dew is formed on the scale, dew water is formed on the upper surface of the column 1b and discharged to the outside by a water gradient. A foam material 18 is adhered to the gap 11, but the foam material 18 does not block the entire gap 11, so that there is no obstacle to ventilation and drainage.

In the event of a fire, the fireproof plates 2a and 2b covering the periphery of the seismic isolation device 3 protect the seismic isolation device 3 from fire, and furthermore, the fireproof plates 2a and 2b are formed for seismic isolation. The refractory gasket 8 inserted here prevents fire or smoke from entering the seismic isolation device 3 through the slit 6.

The gap between the upper refractory plate 2a and the pillar 1a
The fiber blanket 10 and the refractory gasket 17 inserted here prevent the intrusion of the flame or smoke that is going to enter the side of the seismic isolation device 3 from 11.

Further, with respect to the flame or smoke that is going to enter the side of the seismic isolation device 3 from the gap 11 between the lower fireproof plate 2b and the column 1b, the foam material 18 inserted here is heated by heat. It foams and fills the gap 11 to protect the seismic isolation device 3 from fire.

At the time of maintenance of the seismic isolation device 3 surrounded by the fireproof plates 2a and 2b, if the fixing bolts are removed, the fireproof plates 2a and 2b are removed.
Since the 2b can be easily removed, maintenance work becomes easy. After the maintenance is completed, the refractory plates 2a, 2b
Needless to say, the fiber blanket 10 and the refractory gasket 17 inserted in the upper gap 11 can be reused as they are.

[0033]

As described above, the fire-resistant structure of the seismic isolation structure of the present invention has a simple structure that does not impair the seismic isolation function of the seismic isolation structure in which the seismic isolation device is installed. In the place where the seismic isolation device is installed, the inspection is easy, the parts removed at the time of the inspection can be reused and materials can be saved, and the thickness of the fireproof plate can be made thin and lightweight, The appearance dimensions of the pillars do not increase, and the pillars can be formed in a good appearance without attaching a decorative panel.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a seismic isolation slit, which is a main part, showing an embodiment of a fireproof structure in a seismic isolation structure of the present invention.

FIG. 2 is a longitudinal sectional side view of a gap portion between an upper structure and an upper fireproof plate, which are main parts, showing one embodiment of a fireproof structure in the seismic isolation structure of the present invention.

FIG. 3 is a longitudinal sectional side view of a gap portion between a lower structure and a lower fireproof plate, which are main parts, showing one embodiment of the fireproof structure in the seismic isolation structure of the present invention.

FIG. 4 is a partially cutaway side view showing a first example of one embodiment of the fireproof structure in the seismic isolation structure of the present invention.

FIG. 5 is a cross-sectional plan view showing a first example of one embodiment of a fireproof structure in the seismic isolation structure of the present invention.

FIG. 6 is a partially cutaway side view showing a second example of one embodiment of the fireproof structure in the seismic isolation structure of the present invention.

FIG. 7 is a vertical sectional side view showing an example of a fireproof structure of a seismic isolation structure in which a conventional seismic isolation device is installed.

FIG. 8 is a longitudinal sectional side view showing a conventional fireproof structure of a base isolation structure with a base isolation slit wall.

FIG. 9 is a longitudinal side view of a seismic isolation slit showing another example of a fireproof structure in a conventional seismic isolation structure.

FIG. 10 is a longitudinal sectional side view showing another example of the fireproof structure of the seismic isolation structure with the conventional seismic isolation slit wall.

[Explanation of symbols]

1a, 1b ... pillar 2a, 2b ... fireproof plate 3 ... seismic isolation device 4 ... mounting hardware 5 ... projecting part 6 ... seismic isolation slit 7 ... wall 8 ... fireproof gasket 9 ... fireproof fiber 10 ... fiber blanket 11 ... gap 12 ... Mounting hardware 13 ... Outer wall 14 ... Fireproof material 15 ... Bolt 16 ... Fireproof plate 17 ... Fireproof gasket 18 ... Foam material 19 ... Drainer plate 20 ... Mortar joint

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Iwao Tsuruya Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (56) References JP-A-10-306620 (JP, A) JP-A-Hei 10-183817 (JP, A) JP-A-10-280582 (JP, A) JP-A-11-22062 (JP, A) JP-A 54-113217 (JP, U) (58) Fields investigated (Int. Cl. ^7, DB name) E04B 1/94 E04B 1/36 E04H 9/02 331 F16F 15/02 F16F 15/04

Claims (2)

(57) [Claims] 1. between structural bodies such as pillars divided into upper and lower parts,
In a seismic isolation structure formed by installing a seismic isolation device between a structure and a foundation, a fireproof plate from upper and lower structures or foundations is placed between the upper and lower fireproof plates so as to surround the periphery of the seismic isolation device. A fireproof gasket filled with fireproof fiber such as ceramic fiber is inserted into the fireproof slit, and between the lower fireproof plate and the lower structure. A fire-resistant structure in the base-isolated structure, which is equipped with a foam material that expands by heat while ensuring air permeability and water permeability in the gaps. 2. The seismic isolation structure according to claim 1, wherein a refractory gasket and a fiber blanket made of a refractory fiber such as a ceramic fiber are inserted side by side in a gap between the upper structure and the upper refractory plate. Refractory structure in.