JP4371538B2 - Base-isolated building structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a seismic isolation floor is provided between an upper structure portion and a lower structure portion, and a seismic isolation device that can absorb the relative rolling energy of the upper structure portion and the lower structure portion is provided. The present invention relates to a base-isolated building structure in which an indoor finishing portion is provided on the indoor side portion of the structure portion.
[0002]
[Prior art]
In a typical building, the wall part is formed integrally with the pillar, and the ceiling part is supported by the ceiling slab (each part is supported by a plurality of suspension fittings fixed to the ceiling slab at predetermined intervals) Furthermore, the wall part and the ceiling part are also integrally connected. However, in a base-isolated building, the upper structure part above and below the base part is separated by the base part. It is a premise that the lower structure part is relatively laterally moved, and when the upper and lower structure parts cause a relative roll due to the occurrence of an earthquake or the like, the wall part and the ceiling part also cause a relative roll, There is a risk of destruction due to mutual interference.
Therefore, as one of the conventional seismic isolation buildings of this type (hereinafter simply referred to as the first prior art), even if the upper and lower structural parts cause relative rolls, the wall part and the ceiling part are different. In order not to move, as shown in FIG. 9 , both the wall portion 8B and the ceiling portion 8A are fixed to the lower structure portion Jd.
Further, as a conventional seismic isolation building structure (hereinafter simply referred to as the second prior art) different from this, as shown in FIG. 10 , the ceiling portion 8A in the first prior art is separated from the ceiling slab Su. There is one that is supported by a plurality of suspended support members 30, and a slide mechanism 31 that allows relative lateral movement between the support member 30 and the ceiling portion 8A is interposed at the support point (Japanese Patent Laid-Open No. 11-62094). No. publication).
[0003]
[Problems to be solved by the invention]
According to the first prior art described above, since the ceiling itself is supported by the wall at both ends, the support span at that time is the full width of the ceiling, compared to the case of the general building described above. Become very large. Therefore, it is necessary to increase the strength by supporting the ceiling itself with a large beam material, and in addition, it is necessary to strengthen the wall portion that supports the ceiling portion that has become heavy due to the reinforcement. As a result, there are problems that the members of the ceiling and the wall are increased in size, the securing ratio of the indoor space is reduced, and the member cost is increased.
On the other hand, according to the second prior art described above, since the ceiling portion is supported by a plurality of support members suspended from the ceiling slab, there is no need to reinforce the ceiling portion, but the slide mechanism Must be provided for each support point.
Since the slide mechanism must be able to move laterally along all directions in the ceiling surface while securing the support strength of the ceiling, the structure is complicated and the member cost is likely to be high. Furthermore, it is necessary to arrange the slide mechanism in a number corresponding to the number of each support point, and there is a problem that it takes time and labor and tends to increase the overall construction cost.
[0004]
Accordingly, an object of the present invention is to provide a base-isolated building structure in which the above-mentioned problems can be solved and the structure of the ceiling portion and the wall portion can be simplified while the base-isolation function can be exhibited.
[0005]
[Means for Solving the Problems]
As shown in FIGS. 6 to 8 , the characteristic configuration of the invention of claim 1 is provided with a seismic isolation device 3 capable of absorbing the relative rolling energy between the upper structure portion Ju and the lower structure portion Jd. In the base-isolated building structure in which the seismic isolation floor T is provided and the indoor finishing portion 8 is provided in the indoor side portion of the upper structure portion Ju and the lower structure portion Jd, the indoor finishing portion 8 is The ceiling portion 8A formed on the upper structure portion Ju and the wall portion 8B formed on the lower structure portion Jd are configured, and the joint portion between the ceiling portion 8A and the wall portion 8B is located on the side of the wall portion. An end portion of the ceiling portion is arranged with a gap therebetween, and is configured to be relatively laterally movable, and a projecting portion that protrudes indoors along the ceiling surface from the wall portion has a lower surface that is a ceiling plate of the ceiling portion. Provided in slidable contact state, forming the protrusion dimension of the protrusion more than the gap dimension There is where it is.
[0006]
According to the characteristic configuration of the invention of claim 1, the ceiling and the wall are formed so as to be relatively laterally movable at each other's joint portion. Even if they move relatively side by side, it is possible to prevent them from interfering with each other and being damaged (hereinafter referred to as interference preventing action). On the other hand, since the ceiling part is provided in the upper structure part and the wall part is provided in the lower structure part, the support structure can take the same form as the conventional one while achieving the interference preventing function. Is possible. That is, the ceiling part can be divided into short support spans by a plurality of support members (for example, hanging brackets) fixed to the upper structure part at predetermined intervals, and each part can be supported, and the wall part itself It can be attached to the lower structure alone, and the load on the ceiling need not be fully supported.
As a result, both the ceiling and the wall need not be specially reinforced, and it is possible to achieve cost reduction by eliminating the labor and materials involved in the reinforcement. Therefore, the structure of the ceiling part and the wall part can be made simple while exhibiting the seismic isolation function, and the maintenance of the seismic isolation function of the entire building and the cost reduction can be realized.
[0008]
Also, the deviation between the ceiling and the wall portion due to relative lateral movement between the upper portion structure and the lower structure unit, it is possible to tolerate in the gap. In addition, the gap itself can change the design of the ceiling part that tends to be mediocre, and it is possible to improve the aesthetics.
In addition, by arranging the projecting portion and the ceiling plate in a slidable contact state, it is possible to reliably block the ceiling back space and the indoor space, and the joint portion between the ceiling portion and the wall portion. It is possible to alleviate sound leakage through the filter and falling dust.
[0009]
As illustrated in FIG. 8, the characteristic configuration of the second aspect of the invention is that the cover portion 17 that covers the projecting portion 20 and the ceiling plate 9 is covered with the cover portion 17 that covers the projecting portion 20. It is located in the part 8A.
[0010]
According to the characteristic configuration of the invention of claim 2 , in addition to being able to achieve the function and effect of the invention of claim 1, in order to constitute the joint portion, the cover portion and the ceiling plate are provided with the protrusion portion. It is possible to adopt a sandwiched structure, and it is easier to prevent sound leakage through the joint portion, dust falling, and the like.
[0011]
In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.
[0013]
FIGS. 1 and 2 show a building A incorporating the seismic isolation building structure of the present invention. This building A maintains the use state of the building after the building is completed, and in parallel with the middle part of the column. The seismic isolation device 3 is installed in the seismic isolation system (so-called seismic isolation while living).
The building A is composed of a steel reinforced concrete structure consisting of a first basement floor, an eighth floor above ground, and a third floor tower, and a seismic isolation floor T capable of absorbing roll energy is provided on the first floor F1. As mentioned above, in order to maintain the state of use of the building, the seismic isolation work is concentrated on the ground level F1 so that other levels can be used as usual during construction. Is set.
The building A is configured by attaching a precast outer wall panel 2 to the outer peripheral portion of the building structure portion 1 composed of a plurality of pillars P, beams B, and slabs S throughout the entire hierarchy.
[0014]
The other layers excluding the seismic isolation floor T are configured by arranging pillars P1 by normal design (hereinafter referred to as general pillars) at the intersections of the rows and columns in the plan view, and arranged in the outermost row. The outer wall panel 2 is arranged along each pillar.
[0015]
As for the seismic isolation floor T, the arrangement of the columns is the same as that of the other layers, but the structure of the columns is made different so that the roll energy of the earthquake can be absorbed.
Specifically, the columns P2 other than the columns located in the outermost row (hereinafter referred to as seismic isolation columns) P2 are formed with higher strength than the general columns P1, and the seismic isolation device 3 is provided in the middle in the longitudinal direction. Is interposed.
As shown in FIG. 3, the column P3 located in the outermost row (hereinafter referred to as a strengthening column) P1 is integrated by surrounding a low yield point steel material on the outer periphery of the column similar to the general column P1. The toughness is increased.
[0016]
As shown in FIG. 4, the seismic isolation device 3 is formed by alternately laminating metal thin plates 3a and rubber thin plates 3b so that the thin plates 3a and 3b are formed so as to be capable of inter-layer displacement in the lateral direction. Therefore, it is configured such that it can follow the lateral movement of the upper and lower ends of the seismic isolation column P2 while resisting the lateral movement, and exhibit the seismic isolation effect. In addition, the rod-shaped body 3c made from lead is provided in the state which penetrates each thin plate 3a * 3b, and it is comprised so that the damper effect with respect to the interlayer displacement of each said thin plate 3a * 3b can be strengthened more. It is. In addition, the upper and lower end portions are integrally provided with a metal end face flange portion 3d that is slightly larger than the seismic isolation device body portion. A plurality of bolt insertion holes 3e for fixing bolts to the column body are provided at the edge of the end face flange portion 3d.
A portion where the seismic isolation device 3 is interposed is referred to as a seismic isolation portion 4 (see FIG. 6).
[0017]
As shown in FIG. 5, the seismic isolation column P2 originally has a column P that is vertically continuous by cutting and removing a portion (the seismic isolation unit 4) where the seismic isolation device 3 is to be installed. The upper pillar Pu remaining above 4 and the lower pillar Pd remaining below the seismic isolation part 4 are divided, and the seismic isolation device 3 is attached to the seismic isolation part 4.
Accordingly, in the seismic isolation floor T, the upper pillar Pu, the beam Bu, and the ceiling slab Su located above the seismic isolation device 3 from the seismic isolation device 3 due to rolling due to an earthquake or the like (the above configuration is the upper structure portion Ju And the lower pillar Pd, beam Bd, and floor slab Sd (the above configuration corresponds to the lower structure portion Jd) located below the seismic isolation device 3 are relatively moved laterally to reduce the rolling energy.・ It can absorb.
Incidentally, the said seismic isolation apparatus 3 is attached to the lower end part 5 of the upper pillar Pu, and the upper end part 6 of the lower pillar Pd via the metal bottomed cylinder 7 attached to the fitting state, respectively. Yes.
[0018]
Moreover, as shown in FIG. 6, the indoor finishing part 8 is provided in the indoor side part of the said upper structure part Ju and the said lower structure part Jd.
The indoor finishing portion 8 is composed of a ceiling portion 8A formed so as to be supported by the upper structure portion Ju and a wall portion 8B attached to the lower structure portion Jd.
[0019]
The ceiling portion 8A includes a ceiling plate 9, a base frame 10 configured to attach the ceiling plate 9 by assembling channel members in a lattice shape, and a hanging metal fitting 11 that supports the base frame 10 by suspending it from the ceiling slab Su. And is configured. Accordingly, the hanging metal fitting 11, the base frame 10, and the ceiling plate 9 that are integrally attached move integrally with the upper structure portion Ju such as the ceiling slab Su when rolling.
[0020]
The wall portion 8B includes a wall plate 12 and a base frame 13 configured so that the wall plate can be attached thereto. The wall plate 12 is attached to the base frame 13, and the base frame 13 is attached to and supported by a seismic wall W integrally provided on the beam Bd. Therefore, the base frame 13 and the wall plate 12 move integrally with the lower structure portion Jd such as the beam Bd when rolling.
[0021]
Further, the ceiling portion 8A and the wall portion 8B are formed so as to be relatively laterally movable at the mutual joint portion 14.
Specifically, as shown in FIG. 7, an L-shaped angle member 15 is attached to the surface of the wall portion 8 </ b> B, and the ceiling plate 9 extends along the ceiling surface of the two sides of the L-shaped angle member 15. The side portion 15a (corresponding to the protruding portion 20) that protrudes toward the indoor side is slidably contacted with the lower surface. And the clearance gap 16 of the dimension below the protrusion dimension of the said side part 15a (preferably less than a protrusion dimension) is formed between the edge part of the said ceiling board 9, and the said wall part 8B surface.
Therefore, when the upper structure portion Ju and the lower structure portion Jd relatively move sideways due to rolling, the ceiling plate 9 and the wall plate 12 fixed to each other can relatively move sideways. This makes it possible to prevent mutual interference and destruction.
In the building of the present embodiment, the seismic isolation column P2 and the reinforcing column P3 are used in combination on the seismic isolation floor T, so that it is possible to achieve seismic isolation while minimizing rolls during an earthquake. Therefore, the width dimension of the gap 16 can be set to a small dimension accordingly, and the indoor aesthetics can be improved.
[0022]
[Another embodiment]
Other embodiments will be described below.
[0023]
<1> The building is not limited to the steel reinforced concrete structure described in the previous embodiment, and may be, for example, a reinforced concrete structure, a steel frame structure, or a steel pipe concrete structure.
The arrangement of the pillars is not limited to the rectangular arrangement described in the previous embodiment. And the structure of the pillar P in the seismic isolation floor T is not limited to the combined use of the reinforcement pillar P3 and the seismic isolation pillar P2 as described in the previous embodiment. Or a combination of the seismic isolation column P2 and the general column P1.
<2> The seismic isolation floor T is not limited to that provided in the ground level F1, and may be provided in other levels.
<3> As described in the previous embodiment, the seismic isolation device 3 is not limited to a configuration in which the metal thin plates 3a and the rubber thin plates 3b are alternately stacked and integrated, but a lead damper, An oil damper or the like may be used, and these are collectively referred to as a seismic isolation device. In addition, the mounting position of the seismic isolation device 3 is not limited to that set at the upper end portion of the column P, and may be set at the middle portion or the lower end portion of the column P.
<4> The protruding portion 20 is not limited to the one formed by the side portion 15a of the L-shaped angle member 15 attached to the wall portion 8B as described in the previous embodiment, and a part of the wall portion 8B is formed. Further, it may be formed so as to protrude indoors along the ceiling surface, and the portion 8Ba as the protruding portion 20 may be used.
Further, as shown in FIG. 8, a cover portion 17 may be provided on the ceiling portion 8 </ b> A so as to cover the projection portion 20 and cover the joint of the projection portion 20 and the ceiling plate 9. Well, according to this embodiment, it becomes possible to improve the sealing property of the joint part 14, and it is possible to prevent sound leakage through the joint part 14 and prevent dust from falling from the joint part 14. It becomes possible .
[Brief description of the drawings]
[Fig. 1] Cross-sectional view of the building [Fig. 2] Plan view of the building's seismic isolation floor [Fig. 3] Partially cutaway perspective view showing the main part of the reinforcement pillar [Fig. 4] Shows the main part of the seismic isolation device Partial cutaway perspective view [FIG. 5] Installation explanatory view of seismic isolation device [FIG. 6] Explanatory view showing interior finish part [FIG. 7] Detailed cross-sectional view showing joint part [FIG. 8] The joint part of another embodiment Detailed cross-sectional view shown [FIG. 9 ] Cross-sectional side view showing main parts of a conventional building [FIG. 10 ] Cross-sectional side view showing main parts of a conventional building [Explanation of symbols]
3 Seismic isolation device 8 Indoor finishing part 8A Ceiling part 8B Wall part 9 Ceiling plate 14 Joint part 16 Gap 17 Cover part 20 Projection part Ju Upper structure part Jd Lower structure part T Seismic isolation floor

Claims (2)

Between the upper structure part and the lower structure part, a seismic isolation floor in which a seismic isolation device capable of absorbing the relative roll energy is provided is provided, and the upper structure part and the chamber of the lower structure part are provided. It is a base-isolated building structure with an interior finishing part on the inner part,
The indoor finishing portion is composed of a ceiling portion formed in the upper structure portion and a wall portion formed in the lower structure portion, and a joint portion between the ceiling portion and the wall portion is a side of the wall portion. An end portion of the ceiling portion is disposed with a gap in between, and is configured to be relatively laterally movable, and a projecting portion that projects from the wall portion to the indoor side along the ceiling surface has a lower surface that is a ceiling plate of the ceiling portion. A base-isolated building structure which is provided in a state where it slides in contact with each other and has a protruding dimension of the protruding part larger than the dimension of the gap . The overlaying on top of the projecting portion, the seismic isolation building structure according to claim 1, the cover portion covering the joint between the said projecting portion top plate, is provided on the ceiling.

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