JP2012136914A - Fireproof structure for base-isolating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform operations of maintenance, inspection and management of a base-isolating device fire-resistively covered with a fire resistive covering material.SOLUTION: A column 21 of a building is structurally split into two lower and upper sections, that is to say, downside and upside column bodies 21a and 21b, and a base-isolating device 31 is disposed between the downside and upside column bodies 21a and 21b. On two sides directed in mutually reverse directions with respect to the base-isolating device 31, a pair of upside fixed-type fire resistive covering materials 42a1 is fixed to the upside column body 21b, and a pair of downside fixed-type fire resistive covering materials 42a2 is fixed to the downside column body 21a. On the other two sides with respect to the base-isolating device 31, a pair of upside movable-type fire resistive covering materials 42b1 is attached to the upside column body 21b in such a manner as to be freely openable/closable via a hinge, and a pair of downside movable-type fire resistive covering materials 42b2 is attached to the downside column body 21a in such a manner as to be freely openable/closable via a hinge.

Description

  The present invention relates to a fireproof structure of a seismic isolation device provided in a building, and in particular, is a technique that is effective when applied to the efficiency of maintenance, management, and inspection work of a seismic isolation device that is covered with a fireproof coating.

  A building such as a building is provided with a seismic isolation device in order to absorb the shaking at the time of the earthquake and suppress the influence of the earthquake on the building. Examples of seismic isolation devices installed in buildings include rolling bearings, sliding bearings, laminated rubber bearings, etc., which are installed between columns divided between the top and bottom of the building's seismic isolation hierarchy, between columns and beams, etc. Absorbs horizontal shaking during an earthquake.

  The seismic isolation device provided in the building is provided with a fireproof structure in order to protect it in the event of a fire. As a fireproof structure for a seismic isolation device, for example, a fireproof coating method is known in which four sides of the seismic isolation device are surrounded by a fireproof coating material formed in a plate shape with a non-combustible material or a fireproof material.

  However, the conventional fireproof coating method has a structure in which the fireproof coating material is fixed to the upper part and the lower part of the column provided with the seismic isolation device using fastening members such as bolts. It is necessary to remove the fireproof covering material from the pillar during periodic inspection. Therefore, the inspection work becomes complicated, and in some cases, the fireproof coating material is damaged during the removal work.

  Therefore, for example, in the fireproof structure shown in Patent Document 1, a fireproof and fireproof glass inspection window having smoke shielding, flameproofing, and heat shielding properties is provided in the fireproof covering material fixed to the pillar, and the seismic isolation device is installed from this inspection window. Visual inspection is possible.

JP 2006-2119874 A

  However, as shown in Patent Document 1, in the structure in which the inspection window is provided in the fireproof covering material, the seismic isolation device can be visually inspected from the inspection window, but detailed inspection is difficult. Therefore, in order to perform a detailed inspection, it is necessary to remove the fireproof covering material from the pillar. In addition, it is necessary to remove the fireproof covering material when work on the seismic isolation device is necessary for maintenance and management of the seismic isolation device.

  An object of the present invention is to facilitate maintenance, inspection, and management work of a seismic isolation device that is fireproof coated with a fireproof coating material.

  The fireproof structure for a seismic isolation device of the present invention is a fireproof structure for a seismic isolation device that covers a seismic isolation device provided in a building with a plate-shaped fireproof coating material, and the fireproof coating material is attached to the building so as to be freely opened and closed. It is characterized by being.

  The fireproof structure for a seismic isolation device according to the present invention is characterized in that the fireproof covering material is attached to the building using a hinge.

  In the fireproof structure for a seismic isolation device of the present invention, fireproof coating materials are provided on each of the four sides of the seismic isolation device, and the two fireproof coating materials opposite to each other are attached to the building so as to be freely opened and closed. One of the fireproof covering materials is fixed to the building.

  In the fireproof structure for a seismic isolation device according to the present invention, the fireproof coating material is opened and closed to the building on the upper side of the seismic isolation device, the upper fireproof coating material attached to the building so as to be freely opened and closed, and the lower side of the seismic isolation device. The upper fire-resistant coating material and the lower fire-resistant coating material are arranged side by side with a slit-like gap therebetween.

  According to the present invention, since the plate-like fireproof covering material covering the seismic isolation device is attached to the building so as to be freely opened and closed, the seismic isolation device is protected from fire by the fireproof covering material, and the maintenance and inspection of the seismic isolation device is performed. -In management work etc., the work etc. can be easily performed by opening a fireproof covering material.

It is explanatory drawing which shows roughly the structure of the seismic isolation layer of a building. It is a perspective view of the fireproof structure for seismic isolation devices which is one embodiment of the present invention. It is sectional drawing which follows the AA line shown in FIG. It is a cross-sectional view of FIG. It is a perspective view which shows the state by which the movable fireproof covering material of the fireproof structure for seismic isolation apparatuses shown in FIG. 2 was opened. It is explanatory drawing which shows the attachment structure to the column of a movable fireproof coating material.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The seismic isolation layer (intermediate floor seismic isolation layer) 11 shown in FIG. 1 is provided on the intermediate floor of the building 12 in order to give the building 12 such as a building a seismic isolation function.

  The seismic isolation layer 11 includes a staircase 13 in which a staircase (emergency staircase) 14 is provided. The staircase 14 connects the upper floor and the lower floor with the seismic isolation layer 11 in between, and functions as a lifeline of the building 12. In addition, a fireproof compartment 15 is provided in the seismic isolation layer 11 adjacent to the staircase 13, and two pillars 16 that support the building 12 are disposed in the fireproof compartment 15. The wall 17 that partitions the fireproof compartment 15 and the staircase 13 is configured as a fireproof compartment wall made of concrete or the like, and fire safety is ensured between the fireproof compartment 15 and the staircase 13. Yes. A portion of the staircase 13 opposite to the fireproof compartment 15 is a parking lot 18, and two pillars 21 that support the building 12 are arranged in the parking lot 18. A space 22 between the staircase 13 and the parking lot 18 is used as a hoistway (shaft) or a pipe space of the elevator 23.

  Each of the columns 16 and 21 provided in the seismic isolation layer 11 is provided with a seismic isolation device 31 in order to suppress the influence of the earthquake on the building 12 by absorbing horizontal shaking at the time of the earthquake. .

  The columns 16 and 21 are made of reinforced concrete having a rectangular cross section, and the lower columns 16a and 21a standing on the floor 32 of the base isolation layer 11 and the upper columns 16b and 21b supporting the ceiling 33 of the base isolation layer 11, respectively. In addition, the structure is divided into two in the vertical direction. The seismic isolation device 31 is disposed between the lower column bodies 16a and 21a and the upper column bodies 16b and 21b, and supports the load of the building 12 between the respective column bodies 16a, 16b, 21a, and 21b and the lower column. The bodies 16a and 21a and the upper column bodies 16b and 21b are supported so as to be relatively movable in the horizontal direction within a predetermined range.

  In order to prevent damage to the walls 17, 34, 35, 36 constituting the seismic isolation layer 11 due to the operation of the seismic isolation device 31, the walls 17, 34, 35, 36 are identical to the seismic isolation device 31, respectively. A slit-shaped seismic isolation fire joint 37 extending in the horizontal direction at the height portion is provided.

  Since the fireproof compartment 15 of the seismic isolation layer 11 itself is a fireproof compartment, the two pillars 16 provided inside the fireproof compartment 15 have a fireproof structure for the seismic isolation device 31. Absent. On the other hand, the two pillars 21 provided in the parking lot 18 of the seismic isolation layer 11 may be affected by, for example, a fire generated from the vehicle 38 or the like. Therefore, the seismic isolation device fireproof structure 41 of the present invention is applied to the two pillars 21 provided inside the parking lot 18.

  Needless to say, the fireproof structure for a seismic isolation device of the present invention may be applied to the two pillars 16 provided in the fireproof compartment 15.

  First, the seismic isolation device 31 will be described.

  In the illustrated case, a laminated rubber bearing is used as the seismic isolation device 31. As shown in FIGS. 3 and 4, the seismic isolation device 31 which is a laminated rubber bearing includes a rubber plate having high damping characteristics and a support plate such as a steel plate between upper and lower disk-shaped flange plates 31a and 31b. It has a structure in which laminated rubber portions 31c that are alternately laminated in the vertical direction are provided. The lower flange plate 31a of the seismic isolation device 31 is fixed at the center position of the upward end surface of the lower column body 21a, and the upper flange plate 31b is fixed at the center position of the downward end surface of the upper column body 21b. When horizontal vibration due to an earthquake is applied to the building 12, the laminated rubber portion 31c of the seismic isolation device 31 is elastically deformed in the horizontal direction, and the lower column 21a and the upper column 21b of the column 21 are within a predetermined range. The seismic shaking is absorbed by the seismic isolation device 31 by moving relative to each other in the horizontal direction.

  Next, the detail of the fireproof structure 41 for seismic isolation apparatuses of this invention is demonstrated.

  As shown in FIGS. 2 and 3, the fireproof structure 41 for a seismic isolation device according to the present invention has four sides (surroundings) of the seismic isolation device 31 provided between the lower column 21 a and the upper column 21 b of the column 21. ) Is covered (enclosed) with eight plate-like fireproof covering materials 42a and 42b.

  In the fireproof structure 41 for the seismic isolation device of the present invention, as the fireproof covering materials 42a and 42b, for example, a fireproof material such as a calcium silicate plate or a nonflammable material such as a nonflammable board is used.

  The fireproof covering materials 42a and 42b are composed of four fixed fireproof covering materials 42a and four movable fireproof covering materials 42b. In the case shown in the figure, two fireproof covering materials which are opposite to each other. Is a fixed fireproof covering 42a, and the other two fireproof coverings are movable fireproof covering 42b.

  In the case shown in the figure, the two fireproof coatings opposite to each other are fixed fireproof coatings 42a, and the other two fireproof coatings are movable fireproof coatings 42b. If at least one of the fireproof coating materials 42a and 42b is configured as a movable fireproof coating material, the other fireproof coating materials can be arbitrarily set as a fixed fireproof coating material or a movable fireproof coating material. .

  The fixed fireproof covering material 42a is composed of two upper fixed fireproof covering materials 42a1 and two lower fixed fireproof covering materials 42a2.

  The upper fixed fireproof covering material 42a1 is arranged so as to be flush with the outer surface of the corresponding upper column 21b on the opposite side across the seismic isolation device 31, and the upper side portion is the lower end surface of the upper column 21b. And is fixed to a support body 43 fixed to the upper column 21b by a fastening member 44 such as a bolt. That is, the upper fixed fireproof covering material 42 a 1 is fixed to the column 21 (building 12) on the upper side with respect to the seismic isolation device 31.

  Similarly, the lower fixed fireproof covering material 42a2 is arranged so as to be flush with the outer surface of the corresponding lower column 21a on the opposite sides of the seismic isolation device 31, and the lower side portion is placed on the lower side. It is in a state of abutting on the upward end surface of the column body 21a, and is fixed to a support body 43 fixed to the lower column body 21a by a fastening member 44 such as a bolt. That is, the lower fixed fireproof covering material 42 a 2 is fixed to the column 21 (building 12) on the lower side with respect to the seismic isolation device 31.

  A slit-like gap 45 is provided between the upper fixed fireproof covering material 42a1 fixed to the upper column 21b and the lower fixed fireproof covering material 42a2 fixed to the lower column 21a. These slit-like gaps 45 are provided in accordance with the center position of the seismic isolation device 31 in the height direction, and are also provided with seismic isolation fire resistance provided on the walls 17, 34, 35, and 36 constituting the seismic isolation layer 11. The joints 37 have the same height.

  Thus, the upper fixed fireproof covering material 42a1 and the lower fixed fireproof covering material 42a2 are arranged side by side with each other with a slit-like gap 45 therebetween, and the column is interposed via the support 43. 21 (building 12).

  On the other hand, the movable fireproof covering material 42b is composed of two upper movable fireproof covering materials 42b1 as upper fireproof covering materials and two lower movable fireproof covering materials 42b2 as lower fireproof covering materials. .

  The upper movable fireproof covering material 42b1 is arranged so as to be flush with the outer surface of the corresponding upper column 21b on the opposite sides of the seismic isolation device 31, and the upper fixed fireproof covering material 42a1. Are adjacent to each other in a state orthogonal to. The upper movable fireproof covering material 42b1 is attached to the outer surface of the upper column 21b using three hinges 51 in the upper side portion. That is, the upper movable fireproof covering material 42b1 is attached to the upper column 21b of the building 12 so as to be freely opened and closed using the three hinges 51 on the upper side with respect to the seismic isolation device 31.

  Similarly, the lower movable fire-resistant covering material 42b2 is arranged so as to be flush with the outer surface of the corresponding lower column 21a on the opposite side across the seismic isolation device 31, and the lower side It is adjacent to the fixed fireproof covering material 42a2 in a state orthogonal to it. The lower movable fireproof covering material 42b2 is attached to the outer surface of the lower column 21a using three hinges 51 in the lower side portion. That is, the lower movable fireproof covering material 42b2 is attached to the lower column 21a of the building 12 so as to be freely opened and closed using the three hinges 51 on the lower side with respect to the seismic isolation device 31.

  As shown in FIG. 6, the movable fireproof covering materials 42b1 and 42b2 attached to the column 21 using the hinge 51 open and close up and down around the hinge shaft 51a. A door stop 52 is provided on the end face of each column 21a, 21b. The movable fireproof covering materials 42b1, 42b2 come into contact with the door stop 52 to define the closed position.

  In order to secure resistance to fire, the hinge 51 is made of steel, stainless steel, or the like, and the door stop 52 is made of non-combustible board, fireproof board, or the like.

A slit-shaped gap 53 is formed between the upper movable fireproof coating 42b1 attached to the upper column 21b so as to be opened and closed and the lower movable fireproof coating 42b2 attached to the lower column 21a so as to be opened and closed. Is provided. These slit-shaped gaps 53 are aligned with the center position in the height direction of the seismic isolation device 31 and each of the walls 17, 34, 35, 36 constituting the seismic isolation layer 11.
The height is also matched with the seismic isolation fireproof joint 37 provided in. That is, the upper movable fireproof coating material 42b1 and the lower movable fireproof coating material 42b2 are arranged side by side with each other with a slit-shaped gap 53 therebetween, and the gap 53 is connected to the gap 45. Is provided.

  In the fireproof structure 41 for the seismic isolation device of the present invention, the upper movable fireproof coating material 42b1 and the lower movable fireproof coating material 42b2 are attached to the column 21 (building 12) by the hinge 51 so as to be freely opened and closed. When performing maintenance, inspection, management work, etc. of the seismic device 31, as shown in FIG. 5, the upper movable fireproof covering material 42b1 is opened upward and the lower movable fireproof covering material 42b2 is opened downward. Can do. As a result, the seismic isolation device 31 can be easily maintained, inspected, and managed from the state where the seismic isolation device 31 is covered on all sides by the fireproof covering materials 42a and 42b, with a part thereof exposed to the outside. can do.

  Thus, in the fireproof structure 41 for the seismic isolation device of the present invention, a part of the fireproof coating materials 42a and 42b covering the seismic isolation device 31 is configured as the movable fireproof coating material 42b having an opening / closing function. Even with a fireproof structure in which the seismic isolation device 31 is covered with the fireproof covering materials 42a and 42b, the maintenance, inspection, and management of the seismic isolation device 31 can be easily performed by opening the movable fireproof covering material 42b. can do.

  Further, in the present invention, each movable fire-resistant covering material 42b is attached to the column 21 so as to be freely opened and closed using the hinge 51, so that the movable fire-resistant covering material 42b having an opening / closing function can be configured with a simple configuration. it can.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, a laminated rubber bearing is described as the seismic isolation device 31 provided with the fireproof structure 41 for the seismic isolation device of the present invention. However, the present invention is not limited to this, and the seismic isolation device 31 is a rolling bearing. Another type of seismic isolation device such as a sliding bearing or the like may be used.

  Further, in this embodiment, the seismic isolation layer 11 provided with the seismic isolation device 31 is an intermediate floor seismic isolation layer provided on the intermediate floor of the building 12. It is good.

  Further, in the present embodiment, each movable fireproof covering material 42b is divided into an upper movable fireproof covering material 42b1 and a lower movable fireproof covering material 42b2, but this is not restrictive. Only one of them may be provided.

DESCRIPTION OF SYMBOLS 11 Base isolation layer 12 Building 13 Staircase 14 Stair 15 Fireproof compartment 16 Column 16a Lower column 16b Upper column 17 Wall 18 Parking lot 21 Column 21a Lower column 21b Upper column 22 Space 23 Elevator 31 Seismic isolation device 31a, 31b Flange plate 31c Laminated rubber part 32 Floor 33 Ceiling 34, 35, 36 Wall 37 Seismic isolation fireproof joint 38 Vehicle 41 Fireproof structure for base isolation device 42a Fixed fireproof covering 42a1 Upper fixed fireproof covering 42a2 Lower fixed Type fireproof covering 42b Movable fireproof covering 42b1 Upper movable fireproof covering (upper fireproof covering)
42b2 Lower movable fireproof coating (lower fireproof coating)
43 Support 44 Fastening member 45 Clearance 51 Hinge 51a Hinge shaft 52 Per door 53 Clearance

Claims (4)

It is a fireproof structure for a seismic isolation device that covers a seismic isolation device provided in a building with a plate-shaped fireproof covering material,
A fireproof structure for a seismic isolation device, wherein the fireproof covering material is attached to the building so as to be freely opened and closed.   The fireproof structure for a seismic isolation device according to claim 1, wherein the fireproof covering material is attached to the building using a hinge.   The fireproof structure for a seismic isolation device according to claim 1 or 2, wherein a fireproof coating material is provided on each of the four sides of the seismic isolation device, and the two fireproof coating materials opposite to each other are attached to the building so as to be openable and closable. The other two fireproof covering materials are fixed to the building.   The fireproof structure for a seismic isolation device according to any one of claims 1 to 3, wherein the fireproof coating material includes an upper fireproof coating material that is openably and closably attached to the building above the seismic isolation device; It consists of a lower fireproof covering material that can be freely opened and closed on the building below the seismic device, and the upper fireproof covering material and the lower fireproof covering material are arranged side by side with a slit-like gap therebetween. Fireproof structure for seismic isolation devices.

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