JP2001349089A - Base isolation structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation with a simple structure without taking much labor in construction. SOLUTION: In this base isolation structure of building, a base isolation floor T is provided between an upper structural part Ju and a lower structural part Jd. A base isolation device 3 capable of absorbing the relative rolling energy of the upper and lower structural parts is provided in the base isolation floor T. A stairway part K capable of being hoisted through the base isolation floor T is provided through the upper structural part Ju and the lower structural part Jd. The stairway part K is formed by providing an upper stairway part Ku supported on the upper structural part Ju and a lower stairway part Kd supported on the lower structural part Jd through a stairway cutting part 10 allowing the lateral movement of the upper structural part Ju and the lower structural part Jd due to the relative rolling thereof. A structure cutting part 8 allowing the lateral movement of the upper structural part Ju and the lower structural part Jd due to the relative rolling thereof is provided between the upper structural part Ju and the lower structural part Jd. The stairway cutting part 10 is disposed flush with the structure cutting part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seismic isolation floor provided with a seismic isolation device interposed between an upper structure part and a lower structure part capable of absorbing relative rolling energy therebetween. The present invention relates to a base-isolated building structure provided with a stair portion capable of moving up and down a seismic floor between the upper structure portion and the lower structure portion.

[0002]

2. Description of the Related Art In a general building, a staircase portion is formed integrally with a building structure, but in a seismic isolation building, a superstructure above the seismic isolation device is used as a boundary. Part, and the lower structure part below it is premised that they relatively move laterally, and when the upper and lower structure parts relatively roll due to the occurrence of an earthquake or the like, the staircase part is: There is a danger of being destroyed due to the shear force accompanying the roll. Therefore, as a conventional seismic isolation building structure of this type, as shown in FIGS. 10 and 11, the upper structure Ju and the lower structure Jd are separated at a position near the ceiling where the seismic isolation device 3 is installed. And the ceiling slab S which is the upper structure Ju
u, the upper wall 2u, the upper pillar Pu, etc., and the floor slab Sd, the lower wall 2d, the lower pillar Pd, etc., which are the lower structural parts Jd, can relatively move laterally at the separated structural part boundary 21. It was composed. Further, the staircase K is divided into an upper staircase Ku above the landing 20 provided at a substantially middle position in the vertical direction of the seismic isolation floor T and a lower staircase Kd below it. In some cases, an upper staircase Ku and a lower staircase Kd can be slid at a staircase boundary 22 of the landing 20 (Japanese Patent Laid-Open No. 11-1).
No. 48250). And both the upper and lower stairs,
The lower step Kd has a structure in which the side girders 23 are provided, and the lower end of the side stairs Kd is integrally fixed to the floor slab Sd and the upper end is fixed to the landing 20, respectively. Digit 2
3 is integrally connected to the ceiling slab Su, and the lower end of the slide mechanism 2 is placed on the landing 20.
4 was formed. Furthermore, regarding the upper staircase Ku, the upper structure J
In order to prevent the side girders 23 from interfering with the lower wall Jd and being destroyed as u and the lower structure Jd relatively move laterally, a telescopic mechanism 26 is provided in the tread 25 (see FIG. 11
), The interval between the left and right side girders 23 can be changed following the lateral movement.

[0003]

According to the above-mentioned conventional seismic isolation building structure, it is necessary to provide the slide mechanism on the stairs and the telescopic mechanism on the tread plate, which complicates each structure and increases the cost. In addition to being easily connected, there is a problem that it takes a lot of time and effort for construction.

Accordingly, it is an object of the present invention to provide a seismic isolation building structure which can solve the above-mentioned problems and can achieve seismic isolation with a simple structure and without any construction trouble.

[0005]

According to a feature of the present invention, as shown in FIGS. 6 to 9, a relative roll energy between an upper structure Ju and a lower structure Jd is absorbed. A seismic isolation floor T with a flexible seismic isolation device 3 interposed is provided, and a staircase K capable of ascending and descending the seismic isolation floor T is provided over the upper structure Ju and the lower structure Jd. In the seismic building structure, the staircase portion K includes an upper staircase portion Ku supported by the upper structure portion Ju and a lower staircase portion Kd supported by the lower structure portion Jd, and the upper structure portion Ju and the lower portion. The stair cutting unit 10 is provided so as to sandwich the stair-cutting unit 10 that allows the lateral movement accompanying the relative rolling with the structural unit Jd, and is configured between the upper structural unit Ju and the lower structural unit Jd.
A structural cutting portion 8 capable of allowing lateral movement accompanying their relative rolling is provided, and the stair cutting portion 10 and the structural cutting portion 8 are arranged in the same plane.

According to the characteristic structure of the first aspect of the present invention, since the stair cut section and the structural cut section are arranged in the same plane, for example, the upper structure section and the lower structure section are caused by an earthquake or the like. Even if a relative roll occurs, the stair cut section and the structural cut section arranged in the same plane are boundaries of the roll, and the upper stair section abuts on the lower structure section. Rolling can be tolerated without interference or lower stairs contacting the upper structure and interfering with each other. Therefore, it is easy to prevent the stairs from interfering with other parts and being destroyed due to the roll. And, since this action can be achieved without providing the slide mechanism and the telescopic mechanism as in the related art, the structure of each part of the building can be simplified, and the labor for the building can be reduced. , And a reduction in construction cost can be achieved.

The feature of the invention according to claim 2 is that, as illustrated in FIG. 6, the upper stepped portion Ku is formed of the upper structure J.
u is formed in a cantilever type in which a side edge portion is supported by an upper wall portion 2u formed in the lower structure portion Jd, and the side edge portion is supported by a lower wall portion 2d formed in the lower structure portion Jd. The structure cutting portion 8 is formed between the upper wall portion 2u and the lower wall portion 2d so as to allow the lateral movement accompanying the relative rolling thereof. It is at the wall cutting section 9.

According to the characteristic configuration of the second aspect of the invention, in addition to the effect of the first aspect of the invention, in addition to the above, the upper and lower stairs can be provided on the corresponding upper and lower walls by the side edges. The staircase cutting section is set in any of the upper and lower positions, so that the upper and lower stairs themselves are supported by the upper and lower walls in a stable state even if the staircase cutting section is set at any position. Thus, the height of the stair cut portion can be set freely without being limited to a landing as in the related art. As a result, the stair cut portion can be easily adjusted to the height of the wall cut portion, and the freedom of building design can be improved. Furthermore,
Even in seismic isolation work such as installing a seismic isolation device for an existing building later, the vertical position of the stair cut section or wall cut section can be set freely, and the existing stairs can be set. It is possible to carry out seismic isolation work while keeping the original structure as it is, without breaking down the parts, thereby shortening the construction period and reducing costs. However, it goes without saying that the seismic isolation building structure is not intended only for existing buildings, but can be adopted for new buildings.

As shown in FIGS. 7 to 9, the staircase cover body 11 covering the staircase cutting portion 10 can be attached to either the upper staircase Ku or the lower staircase Kd. On one side.

According to the characteristic configuration of the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, the upper structure and the lower structure can be relatively moved by, for example, an earthquake. In the case of a horizontal roll, even if the joint part between the upper staircase and the lower staircase is temporarily opened, it becomes possible to close the opening by the staircase cover body, so that people and objects can This makes it easier to prevent entry into the opening or falling through the opening. And since the staircase cover is attached to either the upper staircase or the lower staircase, it is easy to prevent the displacement force accompanying the roll from acting intensively and torn off. Thus, the effect of closing the opening can be maintained.

A feature of the invention according to claim 4 is that, as illustrated in FIGS. 7 to 9, a wall cover 12 covering the wall cut portion 9 is provided.
Is attached to either the upper wall 2u or the lower wall 2d.

According to the characteristic structure of the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, it is possible to achieve the effect of the invention. In the case where the structure part relatively sways, even if the joint part between the upper wall part and the lower wall part is temporarily opened, the opening can be closed by the wall cover body, It is easy to prevent a person or an object from entering the opening or falling through the opening. And, since the wall cover body is attached to one of the upper wall portion and the lower wall portion, it is easy to prevent the displacement force caused by the lateral swing from being concentrated and torn off. Thus, the effect of closing the opening can be maintained.

As shown in FIG. 6, the staircase cutting part 10 and the wall cutting part 9 are arranged within the height range of the seismic isolation device 3. There.

According to the fifth aspect of the present invention, the function and effect of the first aspect of the present invention can be achieved, and in addition to the rolling surface of the entire base-isolated floor, Since the heights can be made uniform, it becomes possible to more smoothly allow the roll during the seismic isolation operation. And, for example, if the seismic isolation device is installed so as to be located in the height range of the space above the ceiling, the staircase cutting portion and the wall cutting portion will also be installed in the space above the ceiling, Since it is not exposed to the indoor side, it is hard to impair the aesthetics.

As described above, the reference numerals are used for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

FIGS. 1 and 2 show a building A incorporating the seismic isolation building structure of the present invention. After the building is completed, the building A is used in parallel with the building while maintaining the use state of the building. A seismic isolation device 3 is installed in the middle of the system to achieve seismic isolation (so-called seismic isolation while staying). The building A has a steel-framed reinforced concrete structure including a basement floor, eight floors above ground, and three floors of towers, and is provided with a seismic isolation floor T capable of absorbing rolling energy on the first floor F1 above ground. This is because, as described above, seismic isolation work is intensively carried out on one floor F1 above the ground to maintain the use condition of the building, and on other floors,
It is set so that it can be used as usual during construction. The building A is a building structure 1 having a plurality of pillars P, beams B, slabs S, walls 2 and stairs K throughout all levels.
It consists of. 1 and 2, a beam B is provided between adjacent columns P, and a slab S is provided in a portion surrounded by each beam B. Further, the stair portion K is configured to be able to move up and down over the floor slab Sd and the ceiling slab Su, and is provided in a stair room surrounded by the wall portion 2.

The floors other than the seismic isolation floor T are constructed by arranging columns P1 of a normal design (hereinafter referred to as general columns) at intersections of rows and columns in a plan view.

Regarding the seismic isolation floor T, the arrangement of the columns is the same as that of the other floors, but the structures of the columns are different so that the energy of the rolling of the earthquake can be absorbed. Specifically, the columns (hereinafter, referred to as seismic isolation columns) P2 other than the columns located in the outermost row are formed to have higher strength than the general columns P1, and the seismic isolation device 3 is provided in the middle part in the longitudinal direction. Is interposed. As shown in FIG. 3, the column P3 located in the outermost row (hereinafter referred to as the reinforcing column) is formed by surrounding a low yield point steel material on the outer periphery of the same column as the general column P1 to achieve integration. ,
The toughness is enhanced.

As shown in FIG. 4, the seismic isolation device 3 is constructed by alternately laminating a metal thin plate 3a and a rubber thin plate 3b and integrating them, so that the respective thin plates 3a and 3b can be freely displaced in the horizontal direction. , The upper end and the lower end of the seismic isolation column P2 follow while resisting the relative movement in the lateral direction, so that the seismic isolation effect can be exerted. Note that a lead rod 3c is provided at the center of each of the thin plates 3a and 3b so as to penetrate each of the thin plates 3a and 3b so that the damper effect against interlayer displacement of each of the thin plates 3a and 3b can be further enhanced. I have. The upper and lower ends have metal end flanges 3 which are slightly larger than the seismic isolation device body.
d is provided integrally. A bolt insertion hole 3e for fixing a bolt to a pillar is provided at an edge of the end face flange 3d.
Are provided. The part where the seismic isolation device 3 is interposed is referred to as a seismic isolation part 4 (see FIG. 6).

As shown in FIG. 5, the seismic isolation column P2 is formed by cutting and removing a portion of the column P which is originally continuous vertically, at a portion where the seismic isolation device 3 is to be installed (the seismic isolation part 4). Seismic isolation part 4
An upper pillar Pu remaining above and a 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. Therefore, on the seismic isolation floor T, the side of the seismic isolation device 3 becomes
The upper pillar Pu, the beam Bu, the ceiling slab Su, the upper wall 2u, the upper staircase Ku (the above structure is equivalent to the upper structure Ju) located above and the lower located below the seismic isolation device 3. The columns Pd, beams Bd, floor slabs Sd, lower walls 2d, and lower stairs Kd (the above structure is equivalent to the lower structure Jd) relatively move laterally to reduce and absorb the rolling energy. Can be done. Incidentally, the seismic isolation device 3
Are the lower end 5 of the upper pillar Pu and the upper end 6 of the lower pillar Pd.
And a metal bottomed cylinder 7 attached in a fitted state, respectively.
Attached through.

The upper structure part Ju and the lower structure part J
As described above, d means that the respective relative roll energy can be freely absorbed with the seismic isolation part 4 as a boundary, and the structural cut part 8 at each boundary is shown in FIG. As described above, the seismic isolation device 3 is disposed within the installation range of the device, that is, at the height of the ceiling. Therefore, the wall cutting portion 9 which is a boundary between the upper wall portion 2u and the lower wall portion 2d, and the stair cutting portion 10 which is a boundary between the upper stair portion Ku and the lower stair portion Kd are the same as the structural cutting portion 8. It is configured to be in the plane.

Here, the relationship between the wall portion 2 and the stepped portion K will be described. As shown in FIGS. 6 and 7, the upper stepped portion Ku is a piece having a side edge supported by the upper wall portion 2u. The lower stair portion Kd is also configured in a cantilever type with a side edge portion supported by the lower wall portion 2d, and has the same height as the seismic isolation portion 4. With the wall cutting part 9 and the stair cutting part 10 provided as boundaries, they are configured to be able to move relative to each other. Specifically, in the present embodiment, in a building state before seismic isolation, a cut is made using a cutting tool such as a cutter at a location corresponding to the wall cutting section 9 and the stair cutting section 10, and the cut is made. Each cut is formed. Therefore, for example, when the building is shaken by the action of an earthquake or the like, as shown in FIG. 9, the upper structure Ju and the lower structure Jd mutually cut each of the cut portions 9 and 10 formed in the same plane. Can be relatively laterally moved in any direction with the boundary as a boundary, so that seismic isolation can be achieved by the seismic isolation device 3 while preventing both structural parts from interfering with each other and breaking at that part.

A staircase cover 11 covering the staircase cutting portion 10 and a wall cover body 12 covering the wall cutting portion 9 are provided for portions facing the interior of the staircase. Therefore, usually, the cut portions 9 and 10 can be prevented from being exposed, and the design is improved. Then, at the time of the earthquake, each of the cover bodies 11 and 12 closes the opening 13 that is temporarily formed between each of the upper and lower stairs and each of the walls that are displaced by the relative movement, and the opening 13 is sandwiched by that part. It is possible to prevent falling from a part. Each of the cover bodies 11 and 12 is
Each is formed of a thin steel plate, and is separately bolted only to the upper stepped portion Ku and the upper wall portion 2u. Therefore, both the cover bodies 11 and 12 are moved upward by the upper stairs K
u, although it moves with the upper wall 2u, the lower staircase K
d. It can be displaced freely from the lower wall 2d,
The opening 13 can be covered by effectively utilizing the flexibility of the steel plate. That is, each of the cover bodies 11 and 12
However, when both upper and lower portions are fixed, as the interval between the upper and lower fixing portions increases with the rolling, stress concentration occurs in those fixing portions, and there is a risk that the cover body may be torn. According to the structure, as described above, it is possible to flexibly respond. In addition, in the case of the building of the present embodiment, the seismic isolation floor T is provided with the seismic isolation column P2 and the strengthening column P3, so that it is possible to achieve the seismic isolation while suppressing the roll at the time of the earthquake. Therefore, it is possible to suppress the opening 13 from becoming large, and accordingly, it is possible to set the width dimension of each of the cover bodies 11 and 12 to a small dimension, and it is possible to improve the aesthetics of the indoor side. Things.

According to the building of the present embodiment, even in the staircase room portion which tends to have a complicated structure in order to achieve seismic isolation,
The structure can be configured to be simple, and it is possible to reduce the labor for construction and the construction cost.

[Another Embodiment] Another embodiment will be described below.

<1> The building is not limited to the steel reinforced concrete structure described in the above embodiment, and may be, for example, a reinforced concrete structure, a steel frame structure, or a steel tube concrete structure. In addition, after the building is completed, the seismic isolation device 3 is installed in the middle part of the column in parallel while maintaining the use condition of the building to achieve seismic isolation (so-called seismic isolation while staying). Instead, it may be a new building. The arrangement of the columns is not limited to the rectangular arrangement described in the above embodiment. The configuration of the column P on the seismic isolation floor T is not limited to the combination of the reinforcement column P3 and the seismic isolation column P2 as described in the previous embodiment. Alternatively, the seismic isolation column P2 and the general column P1 may be used in combination. <2> The seismic isolation floor T is not limited to one provided on the first floor F1 above the ground, and may be provided on another floor. <3> The seismic isolation device 3 is not limited to the configuration in which the metal thin plates 3a and the rubber thin plates 3b are alternately laminated and integrated as described in the above embodiment, but may be a lead damper,
It may be constituted by an oil damper or the like, and these are collectively called seismic isolation devices. Further, the mounting position of the seismic isolation device 3 is not limited to the position set at the upper end portion of the column P, but may be set at the middle portion or the lower end portion of the column P. <4> The upper staircase Ku and the lower staircase K
d is not limited to a cantilever type having a side edge portion supported by the wall portion, and can take various structures. For example, the upper staircase Ku may take the form of a cantilever whose edge is supported by a ceiling slab Su or a beam Bu, or a structure in which it is also supported by an upper wall 2u. The same deformation is possible for the stepped portion Kd. In short, as long as each of the stepped portions Ku and Kd is configured to be stable in terms of strength, the supporting form thereof can be freely selected. It is.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a building.

Fig. 2 Floor plan of the base-isolated floor of the building

FIG. 3 is a partially cutaway perspective view showing a main part of a reinforcing column.

FIG. 4 is a partially cutaway perspective view showing a main part of the seismic isolation device.

FIG. 5 is an explanatory view of mounting a seismic isolation device.

FIG. 6 is a cross-sectional view showing a step portion.

FIG. 7 is a sectional view showing a staircase portion.

FIG. 8 is a perspective view showing a stair part.

FIG. 9 is an explanatory cross-sectional view showing displacement of a staircase portion.

FIG. 10 is a side sectional view showing a main part of a conventional building.

FIG. 11 is a cross-sectional view showing a main part of a staircase of a conventional building.

[Explanation of symbols]

 2u Upper wall section 2d Lower wall section 3 Seismic isolation device 8 Structural cutting section 9 Wall cutting section 10 Stair cutting section 11 Stair cover body 12 Wall cover body Ju Upper structure section Jd Lower structure section K Stair section Ku Upper stair section Kd Lower staircase Part T Seismic isolation floor

Claims (5)

[Claims] A seismic isolation floor is provided between an upper structure and a lower structure where a seismic isolation device capable of absorbing relative rolling energy therebetween is provided, and the seismic isolation floor can be moved up and down. A seismic isolation building structure provided with a stair portion extending between the upper structure portion and the lower structure portion, wherein the stair portion is supported by the upper structure portion and the lower structure portion. And a lower staircase portion provided between the upper structure portion and the lower structure portion so as to sandwich a staircase cutting portion capable of allowing a lateral movement accompanying a relative roll between the upper structure portion and the lower structure portion. A seismically isolated building structure in which a structural cutting portion is provided between the structural portion and the structural cutting portion capable of allowing lateral movement accompanying their relative rolls, and the stair cutting portion and the structural cutting portion are arranged in the same plane. . 2. The upper staircase is formed in a cantilever type with a side edge supported by an upper wall formed in the upper structure, and the lower staircase is formed in the lower structure. The side wall portion is supported by the lower wall portion, and the structure cutting portion is moved laterally between the upper wall portion and the lower wall portion due to their relative rolling. The seismic isolation building structure according to claim 1, wherein the seismic isolation building is a wall cut portion formed so as to be free. 3. A stair cover body covering the stair cutting portion,
The seismic isolation building structure according to claim 1, wherein the seismic isolation building structure is attached to one of the upper staircase and the lower staircase. 4. The seismic isolation building structure according to claim 2, wherein a wall cover body covering the wall cut portion is attached to one of the upper wall portion and the lower wall portion. . 5. The stair cut section and the wall cut section are arranged within a height range of the seismic isolation device.
4. The base-isolated building structure according to any one of 4.