JP3066526B2 - Fire protection equipment for seismically isolated buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire protection system for a base-isolated building having a base installed with a base-isolation device.

[0002]

2. Description of the Related Art As a seismic isolation device for a building, for example, there is a seismic isolation rubber 1 made of laminated rubber in which rubber and steel plates are alternately stacked. As shown in FIGS. 6 and 7, a seismic isolation pit 3 is formed, and a seismic isolation rubber 1 is arranged in the seimic pit 3 to support the foundation of the building frame 2.

In the illustrated example, the seismic isolation pit 3 is
Of the basement floor 5 supporting the slab 4 of the first floor 2a and the slab 6 of the seismic isolation pit 3 It is installed to prevent the shaking during the earthquake from being transmitted to the building frame 2 as much as possible.

[0004] Since the building skeleton 2 is cut off from the ground by the seismic isolation pit 3 in which the seismic isolation rubber 1 is installed, the first floor and the basement of the building at the location of the seismic isolation pit 3 are located below the building skeleton 3. An opening 7 communicating with the outdoors or the like is generated.

The opening 7 will be further described with reference to the example shown in the drawing. A two-level horizontal circulation type parking machine is installed here as a mechanical parking space on the first basement floor 2b immediately below the seismic isolation pit 3. The slab 6 of the pit 3 is provided with an opening 9 for raising and lowering the vehicle.
It communicates with the front parking lot 8 on the floor 2a. In the figure, reference numeral 10 denotes a lift installed in the opening 9 for elevating and lowering the vehicle, and reference numeral 11 denotes a turntable installed in the front room 8 of the parking lot.

At the opening 9, the seismic isolation pit 3
Up the slab 6 and the rising wall 12
An opening 7 is formed between the rising wall 12 and the foundation beam 5 as a gap for absorbing shaking at the time of an earthquake and separating the ground from the building frame 2.

In the illustrated example, the opening 7 communicates directly with the mechanical parking lot on the first basement floor 2b and the parking lot front room 8 on the first floor 2a, and further through the parking lot front room 8. It has a structure that communicates with the outdoors, but it may have a structure that communicates directly with the outdoors.

[0008]

As described above, the seismic isolation pit 3 and its lower floor (the first floor 2b underground in the illustrated case) or the floor above it (the first floor 2a above the ground in the illustrated case) or the outside. In a base-isolated building where an opening 7 is formed between
If a fire occurs on the floor 2b, the ground floor 2a on the ground, or another building, the fire or smoke from the fire enters the seismic isolation pit 3,
The seismic isolation function may be impaired, but no traditional building has established an effective means of dealing with this.

The present invention solves the inconvenience of the prior art, and in a base-isolated building in which an opening is formed between a base-isolated pit and its lower floor, its upper floor, or the outside, through this opening. It is an object of the present invention to provide fire prevention equipment capable of preventing a fire from reaching a seismic isolation pit and securing a seismic isolation function even in the event of a fire.

[0010]

In order to achieve the above object, the present invention forms a seismic isolation pit as a place for installing a seismic isolation device such as seismic isolation rubber and the like. In a fire-resistant facility for a base-isolated building that supports a building frame and the opening of the seismic isolation pit communicating with the outdoors or other places is closed with a flexible fire-resistant zone, the fire-resistant zone is a beam located near the opening. Both ends are attached to the side and the rising wall from the slab of the seismic isolation pit, and are arranged so as to hang down in a U-shape in the gap between the side of the beam and the rising wall from the slab of the seismic isolation pit. The gist of the present invention is that the fireproof belt is slidably mounted in a horizontal direction on a rising wall from the slab of the seismic isolation pit through a loose hole formed in the fireproof belt.

The common function of the present invention described in claims 1 and 2 is that a seismic isolation pit is formed as a place for installing a seismic isolation device such as seismic isolation rubber, and the seismic isolation device disposed in the seismic isolation pit is used. In a seismic isolation building supporting a building frame, the seismic isolation pit closes an opening communicating with the upper floor or lower floor of the building or the outside with a flexible fire-resistant zone, so that the upper floor or lower floor is closed. Fire from the floor and outdoors can be prevented from reaching the seismic isolation pit. Even if the opening is closed with a fireproof zone, it is made flexible so that it flexes following the movement due to shaking during an earthquake and does not impair the seismic isolation function.

In addition to the above, according to the present invention, both ends of the fireproof zone are attached to the side of the beam located near the opening and the rising wall from the slab of the seismic isolation pit. It is arranged with a play so as to hang down in a U-shape in the gap between the side of the beam and the rising wall from the slab of the seismic isolation pit. The width of the beam can be coped with and the margin between the beam and the slab of the seismic isolation pit can be secured.

According to the second aspect of the present invention, in addition to the above operation, the fireproof zone slides horizontally on the rising wall from the slab of the seismic isolation pit through the loose hole formed in the fireproof zone. Because it is freely mounted, even if the rising wall of the slab of the seismic isolation pit moves horizontally, this movement is absorbed by the loose hole against the swing in the length direction of the opening, that is, the direction where there is no play of hanging. It is not transmitted to the refractory zone, it is possible to secure the marginal state, and it is possible to cope with shaking in this direction.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional front view showing an embodiment of the fire protection equipment of the present invention, and FIG. 2 is a vertical front view of a main part of the fire protection equipment according to the first embodiment. Since it is as already explained, detailed explanation here is omitted.

The present invention is embodied in a seismically isolated building having a seismic isolation pit 3, and includes a seismic isolation pit 3 and a first basement floor 2b.
At the location of the opening 9 formed in the slab 6 between the slab 6 and the rising wall 12 from the slab 6 and the beam of the building frame 2 around the opening 9, in the illustrated example, the foundation beam 5 which is the foundation. The opening 7, which is a groove-shaped gap formed therebetween, was closed with a flexible fireproof zone 13.

The refractory zone 13 uses, for example, an alumina ceramic blanket of t = 25.0 mm as having flexibility. This is the fireproof expansion joint cover of the Japan Expansion Joint Industry Association (fireproof time: 2 hours, BCJ-Disaster Prevention 235-236, 495-499)
It is equivalent to the one used for

The performance test results of the shape: 7200 × 600 × 12.5 (mm) product name: Kaowool blanket 8P (JIS No. 2 equivalent product) are as shown in the table below.

[0018]

[Table 1]

The mounting structure of the fireproof zone 13 to the opening 7 will be described. L-shaped mounting hardware 14 and 15 are fixed to the side surface of the foundation beam 5 and the side surface of the rising wall 12 with bolts, respectively.
The longitudinal ends of the refractory zone 13 are attached to these L-shaped mounting hardware 14 and 15. In this case, the width of the refractory zone 13 is formed to be longer than the width of the opening 7 and is attached inside the opening 7 so as to hang down in a U-shape to provide a play portion 13a.

Further, as shown in FIG. 3, a refractory zone 13 on the side attached to the rising wall 12 has a loose hole (elongated hole) 16.
Is formed, and the mounting hardware is inserted through the loose hole 16.
Join to 15. Then, the upper part of the refractory zone 13 is covered with another L-shaped mounting hardware 17 having one end fixed to the foundation beam 5 with bolts,
The other end of the L-shaped mounting hardware 17 is wrapped on the upper surface of the mounting hardware 15.

The corners of the opening 7 at the corners where the foundation beams 5 are orthogonal to each other, as shown in FIGS. 4 and 5, the fireproof zones attached to the adjacent foundation beams 5 and the rising walls 12 respectively.
The ends of 13 and 13 meet, but there is a gap at this point. In order to close this gap, another short fireproof belt 18 is applied to the lower part of the end of the fireproof belts 13 and 13, and this fireproof belt 18 is fixed to the fireproof belts 13 and 13 on both sides with bolts 19. 13, 13
Join together to close the gap.

Next, the operation will be described. Seismic isolation pit 3
The opening 7 of the building is closed by the fireproof zone 13 so that
Even if a fire from the parking lot front room 8 on the floor 2a, the basement floor 2b, or the outside reaches the opening 9, it can be prevented from reaching the seismic isolation pit 3.

Even if the opening 7 is closed by the fire-resistant zone 13, it is made flexible so that it flexes following the movement due to shaking during an earthquake, and does not impair the seismic isolation function.
The wall 12 rises due to the shaking of the opening 7 in the width direction during an earthquake.
Can move in the direction in which the width of the opening 7 is widened, this change can be dealt with by the slack play 13a, and the margin between the foundation beam 5 and the slab 6 of the seismic isolation pit 3 can be secured.

In addition, in the case of swinging in the length direction of the opening 7, that is, in the direction without the hanging play 13 a, the rising wall 12 of the slab 6 of the seismic isolation pit 3 moves in the length direction of the opening 7. Even if it moves horizontally, this movement is absorbed by the loose hole 16 and is not transmitted to the refractory zone 13, so that the marginal state can be ensured and the swing in this direction can be dealt with.

[0025]

As described above, the fire prevention equipment of the present invention
First, the seismic isolation pit closes the opening communicating with the upper floor, lower floor, and the outside with a flexible fireproof zone, so that fire from the first floor, the basement, and the outside of the building can be isolated. Can be prevented. Even if the opening is closed with a fireproof zone, it is made flexible so that it flexes following the movement due to shaking during an earthquake and does not impair the seismic isolation function.

Second, both ends of the refractory zone are attached to the side of the beam located near the opening and the rising wall from the slab of the seismic isolation pit, and the side of the beam and the slab of the seismic isolation pit are provided. It is arranged with a play so as to hang down in a U-shape in the gap between it and the rising wall, so that it is possible to cope with a change in the width of the opening due to the shaking during an earthquake with this hanging play. The separation between the slab and the seismic isolation pit can be secured, and the seismic isolation function is not impaired.

Third, since the fireproof zone is slidably mounted in the horizontal direction on the rising wall from the slab of the seismic isolation pit through the loose hole formed in the fireproof zone, the length of the opening, that is, the hanging direction, Even if the rising wall of the slab of the base-isolated pit moves horizontally, the movement is absorbed by the loose hole and will not be transmitted to the fireproof zone, so that the slab will be cut off. It is possible to secure the seismic isolation function and to cope with the shaking in this direction, and secure the seismic isolation function.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a fire prevention facility of the present invention.

FIG. 2 is a longitudinal sectional front view of a main part showing an embodiment of the fire prevention equipment of the present invention.

FIG. 3 is a bottom view of a main part showing an embodiment of the fire prevention equipment of the present invention.

FIG. 4 is a perspective view of a corner portion showing the embodiment of the fire prevention equipment of the present invention.

FIG. 5 is a plan view of a corner portion showing an embodiment of the fire prevention equipment of the present invention.

FIG. 6 is a longitudinal sectional front view of a main part of a building in which the fire prevention equipment of the present invention is implemented.

FIG. 7 is a cross-sectional plan view of a main part of a building in which the fire prevention equipment of the present invention is implemented.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seismic isolation rubber 2 ... Building frame 2a ... 1st floor 2b ... 1st basement floor 3 ... Seismic isolation pit 4 ... Slab 5 ... Foundation beam 6 ... Slab 7 ... Opening 8 ... Parking lot front room 9 ... Opening 10 ... Lift 11 ... Turntable 12 ... Rising wall 13 ... Fireproof zone 13a ... Play 14,15 ... Mounting hardware 16 ... Loose hole 17 ... Mounting hardware 18 ... Fireproof zone 19 ... Bolt

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-29638 (JP, A) JP-A-9-209473 (JP, A) JP-A-10-2042 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) E04B 1/94 E04H 9/02 331

Claims (2)

(57) [Claims] 1. A seismic isolation pit as a place for installing a seismic isolation device such as seismic isolation rubber is formed, and a building frame is supported by the seismic isolation device arranged in the seismic isolation pit. In a fire-resistant facility for a base-isolated building that closes the opening communicating with the building with a flexible fire-resistant zone, the fire-resistant zone is located on the side of the beam located near the opening and the rising wall from the slab of the seismic isolation pit. A fireproof facility for a base-isolated building, wherein both ends are attached and the pipe is suspended so as to hang down in a U-shape between a side of a beam and a rising wall from a slab of a base-isolated pit. 2. The fire prevention equipment for a base-isolated building according to claim 1, wherein the fire-resistant zone is horizontally slidably attached to a rising wall from the slab of the seismic isolation pit through a loose hole formed in the fire-resistant zone.