JP3851034B2 - Seismic isolation structure for intermediate floors of buildings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is suitable for existing buildings, but for new buildings as well, in order to improve the seismic safety, a part of the pillars on the middle floor of the building is cut off and a seismic isolation device is installed. It belongs to the technical field of the intermediate floor seismic isolation structure that is implemented by installing a damper separate from the device, and more specifically, the damper installation mode is suitable for using the base isolation floor (intermediate floor) as a living room. It relates to the seismic isolation structure of the middle floor of the devised building.
[0002]
[Prior art]
Technologies for improving the seismic safety of buildings can be broadly classified into three types: seismic isolation structure, seismic reinforcement, and vibration suppression. Of these, the seismic isolation structuring technique is particularly noticeable in terms of the high effect of improving seismic resistance and the possibility of concentrating the construction range. For example, JP-A-10-121746, JP-A-11-62271, etc. Are well known and disclosed.
[0003]
In the known invention, the seismic isolation device is installed in a space formed by cutting a part of an existing pillar on the middle floor of an existing building, and a damper separate from the seismic isolation device is provided for seismic isolation. It is structured.
[0004]
[Problems to be solved by the present invention]
However, the intermediate floor seismic isolation structure of the building has the following problems.
[0005]
(1) The maximum amount of horizontal deformation during an earthquake is assumed to be about 30 to 50 cm. Therefore, when providing a “seismic isolation layer” in which a seismic isolation device is installed in a living room or the like, safety measures are required so that a user of the living room or the like does not enter the horizontal deformation range. As a result, the effective space as a living room is inevitably reduced, and it cannot be said that the space is efficiently utilized.
[0006]
(2) The seismic isolation structure in which the seismic isolation device and the damper are installed separately is separate from the seismic isolation structure in which the seismic isolation device and the damper are integrated. Therefore, there is an advantage that each performance can be freely adjusted and implemented. On the other hand, as shown in FIGS. 7A to 7D, a space (seismic isolation layer) such as a living room is closed with a damper element, and there is a drawback that the degree of freedom of architectural planning is greatly reduced.
[0007]
Therefore, the object of the present invention is to devise the installation mode of the damper and use the upper surface portion of the fixed plate constituting the damper for a desk or table, so that the seismic isolation layer can be efficiently used as a living room, and the architectural planning. The purpose is to provide a seismic isolation structure on the middle floor of the building that can increase the degree of freedom.
[0008]
[Means for Solving the Problems]
As a means for solving the problems of the prior art, the intermediate floor seismic isolation structure of the building according to the invention described in claim 1 is:
In the middle floor seismic isolation structure of a building, which is constructed by excising part of the pillar 1 on the middle floor of the building and installing the seismic isolation device 2 and providing a damper 3 separate from the seismic isolation device 2
The damper 3 is composed of a movable plate 4 and a fixed plate 5 that move relative to each other in a form surrounding the pillar, and a slider-type damping device 6 that is installed in a sandwich between the two.
The relative movement movable plate 4 which is that it substantially horizontally attached to the upper structure portion centered on the seismic isolation device said post 1 above the 2,
The fixing plate 5, the seismic isolation device is disposed substantially horizontally in a shape clearances C corresponding to the land Shinji maximum deformation amount of said post 1, above the 2, the lower than the seismic isolation device 2 Being fixed to the lower structure part centering on the pillar 1,
It is characterized by.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
1A to 1C show an embodiment of an intermediate floor seismic isolation structure for a building according to the invention described in claim 1 . This seismic isolation structure on the middle floor is a seismic isolation device that cuts out (or separates) a part of the pillar 1 on the middle floor regardless of whether the building is an existing building or a new construction. 2 is provided, and a damper 3 is provided separately from the seismic isolation device 2, and is preferably implemented mainly when providing a seismic isolation layer of a building to a living room or the like.
[0013]
The damper 3 is composed of a movable plate 4 and a fixed plate 5 that move relative to each other, and a slider-type damping device 6 that is installed in a sandwich between the plates (FIG. 1C).
[0014]
The slider-type attenuation device 6 is deformed with the relative movement of the movable plate 4 and the fixed plate 5 as shown in FIG. 2C and absorbs energy (attenuation operation) during an earthquake . In the case of the illustrated example, the movable plate 4 that moves relative to the outer surface 7a of the steel pipe 7 that is built by filling the outer periphery of the column 1 above the seismic isolation device 2 with mortar or the like is bonded by means such as welding. It is mounted almost horizontally. The fixed plate 5 is disposed substantially horizontally with a perforated shape that sufficiently secures a clearance C corresponding to the maximum deformation amount (interlayer displacement) at the time of an earthquake with respect to the outer surface 7a of the steel pipe 7. 8 through, that provided fixed to the floor slab 9a of the seismic isolation device 2 from the lower beam 9. Thus, as shown in FIG. 1B, the damper 3 that is implemented by installing a form surrounding the periphery of the pillar 1 (steel pipe 7).
[0015]
Incidentally, the code | symbol 10 in FIG. 1 has shown the beam reinforcement steel plate installed in the part to which the said supporting member 8 is fixed among the upper surfaces of the floor slab 9a. Reference numeral 11 in FIG. 1 indicates a rib for maintaining a distance between the upper and lower fixed plates 5. Reference numeral 12 in FIG. 1 denotes a cover member that can be expanded and contracted in the horizontal direction for preventing exposure of the movable plate 4 and maintaining safety.
[0016]
In said embodiment, although the steel pipe 7 is used as an upper structure part above the seismic isolation apparatus 2 which attached the movable plate | board 4 which moves relatively, it is not limited to this. When the steel pipe 7 is not used, the movable plate 4 may be directly attached to the column 1 for implementation. Alternatively, as shown in FIG. 3, the movable plate 4 can be formed in a substantially L-shape and attached to the upper beam 9 in the same manner.
[0017]
In the above-described embodiment, one movable plate 4 that moves relative to the steel pipe 7 is attached, and two fixed plates 5 are provided in the vertical direction so as to sandwich the movable plate 4 in a sandwich shape. However, the present invention is not limited to this. . In order to sufficiently exhibit the desired damping performance, the movable plate 4 may be used in parallel, and the fixed plate 5 may be used in an arrangement in which the movable plates 4 are alternately sandwiched. Ru can also be carried out for a further by increasing the number of sheets.
[0018]
Of the two fixed plates 5, the upper surface of the upper fixed plate 5 is supported at a height suitable for a user such as a living room as a desk or table, for example, about 80 cm from the floor slab 9a. it is not preferable that is.
[0019]
In the embodiment shown in FIG. 1B, the damper 3 is installed in a form surrounding the outer periphery of the pillar 1, but is not necessarily limited thereto. For example, according to the space desired by the user such as a living room, the configuration can be implemented with only the right half or the left half of the damper 3 shown in FIG. 1B. In this case, as shown in FIG. 6, a so-called viscous wall type damper 16 in which a movable plate 14 and a fixed plate 15 that are relatively moved are installed in a vertical posture in a space where the damper 3 is not installed. It can be installed and used effectively as a partition wall.
[0020]
As shown in FIG. 1A, the support member 8 of the fixed plate 5 has a longitudinal cross-sectional shape formed into a concave shape from the steel pipe 7 provided on the column 1 below the seismic isolation device 2 to the outer edge of the fixed plate 5. However, it is not limited to this form. As long as the structure can sufficiently support the fixed plate 5, the present invention can be implemented in various forms. For example, as shown in FIG. 4, the support member 8 may be implemented in a substantially circular wall shape fixed to the floor. As shown in FIG. In order to make it easier to sit and do desk work, the lower fixed plate 5 may be provided at a position that is considerably inward from the outer peripheral edge of the lower fixed plate 5, and may be implemented in a form that secures an empty space for inserting a knee.
[0021]
According to the seismic isolation structure for the intermediate floor of the building having the above configuration, when a horizontal displacement occurs due to an earthquake or the like, a deformation operation as shown in FIG. 2 is generated as an example. That is, when a horizontal displacement such as an earthquake occurs, the column 1 (upper structure portion) above the seismic isolation device 2 having the movable plate 4 is displaced within the range of the clearance C. Is absorbed and gradually converges to the original position. Therefore, the fixed plate 5 that sufficiently secures the clearance C and is firmly fixed to the lower structure portion (floor slab 9a) below the seismic isolation device 2 causes any relative displacement to a user such as a living room. Absent.
[0022]
[Effects of the present invention]
According to the intermediate sponges sinker structure of the building according to the invention described in claim 1, the fixed plate 5 of the damper 3 is to the upper structure portion around the upper of the column 1 from the seismic isolation device 2, earth in a shape clearances corresponding to the maximum deformation amount of Shinji, because it is securely fixed to the lower structure portion around the pillar 1 below the seismic isolation device, the movable plate with respect to the user, such as room never 4 of relative displacement dangerous, configurations and it can be said that fully retain safety.
[0023]
Therefore, the upper surface of the fixed plate 5 can be effectively used as a desk or table for a user such as a living room, and the seismic isolation layer can be used efficiently without losing the space efficiency of the living room as much as possible. it can. Along with that, the seismic isolation structure of the building, where the seismic isolation device and the damper are installed separately, will not be blocked by the damper elements, and the degree of freedom in building planning will be increased Can do.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view showing a seismic isolation structure for a building according to the present invention, B is a plan view thereof, and C is an enlarged view of an X portion of A. FIG.
FIG. 2A is a cross-sectional view showing an example of a building seismic isolation structure according to the present invention at the time of deformation, B is a plan view thereof, and C is an enlarged view of an X ′ portion of A. FIG.
FIG. 3 is a cross-sectional view showing different embodiments of the building seismic isolation structure according to the present invention.
FIG. 4 is a cross-sectional view showing different embodiments of the building seismic isolation structure according to the present invention.
FIG. 5 is a cross-sectional view showing different embodiments of the building seismic isolation structure according to the present invention.
FIG. 6 is a cross-sectional view showing different embodiments of the building seismic isolation structure according to the present invention.
7A to 7D are simplified diagrams showing a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Column 2 Seismic isolation device 3 Damper 4 Movable plate 5 Fixed plate 6 Damping device 7 Steel pipe 8 Support member 9 Beam 9a Floor slab 10 Beam reinforcement steel plate 11 Rib 12 Cover member 14 Movable plate 15 Fixed plate 16 Viscous wall damper

Claims (1)

In the middle floor seismic isolation structure of a building, which is constructed by removing a part of the pillar on the middle floor of the building and installing a seismic isolation device, and installing a damper separately from the seismic isolation device,
The damper is composed of a movable plate and a fixed plate that move relative to each other in a form that surrounds the pillar, and a slider-type damping device that is installed in a sandwich between the plates,
The relative movement to the movable plate, that is attached substantially horizontally to the upper structure portion around the upper side of the pillar from the seismic isolation device,
The fixed plate, the seismic isolation device from being disposed substantially horizontally in the corresponding shape of clearances in the land Shinji maximum deformation amount of the pillars of the upper, centered on the column lower than the seismic isolation device Being fixed to the lower structural part,
A seismic isolation structure on the middle floor of a building.

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