JP2000345730A - Vibration isolation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the floor planning of an upper structure section and a lower structure section, having a vibration isolation function by installing a mega-structure between the lower structure section and a vibration isolation layer. SOLUTION: A vibration isolation layer B3 is mounted between a lower structure section B1 and an upper structure section B4. A mega-structure B is set up between the lower structure section B1 and the vibration isolation layer B3 in the vibration isolation structure B. The vibration isolation layer B3 has a slider supporting the upper structure B4 horizontally slidably on the mega-structure B2, a damper imparting resistance to the horizontal sliding of the upper structure section B4 and a stopper controlling the maximum quantity of the horizontal sliding of the mega-structure B2 and the upper structure section B4. Accordingly, the floor planning of the upper structure section B4 and the lower structure section B1 can be changed, having a vibration isolation function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base-isolated building having a base-isolated layer between a lower structure and an upper structure.

[0002]

2. Description of the Related Art Conventionally, as a seismic isolation building of this kind, in order to stably support a column load of an upper structure part with a lower structure part, basically, upper and lower structural parts sandwiching a seismic isolation layer are used. , Both are formed on the same column, and the seismic isolation layers are generally provided at the lowest level, the first floor underground, or the first floor above ground (Japanese Patent Laid-Open No. 10-306
614 publication). In addition, in a case where a seismic isolation device is attached to an existing building to achieve seismic isolation, a seismic isolation layer may be provided on a middle floor. However, also in this case, both the upper and lower structural portions sandwiching the seismic isolation layer are formed in the same column.

[0003]

According to the above-mentioned conventional seismic isolation building, since the columns of the upper structural part and the lower structural part are the same, the plan of the upper structural part and the lower structural part is required. There is a problem that it is difficult to make a large difference, it is difficult to make a change in the plan of the upper and lower structural parts, and it is easy for the upper and lower structural parts to be uniform seismically isolated structures.

Accordingly, an object of the present invention is to provide a seismic isolation building which solves the above-mentioned problems and has a seismic isolation function, which can change the plan of the upper structure and the lower structure. Where you do it.

[0005]

According to the first aspect of the present invention, as shown in FIGS.
In the base-isolated building having a base-isolated layer B3 between the base structure 1 and the upper structure B4, the lower-structure B1 and the base-isolated layer B are provided.
3 is provided with a megastructure B2. According to the characteristic configuration of the invention of claim 1, since a megastructure is provided between the lower structure portion and the seismic isolation layer, a load is applied by the megastructure in accordance with the column structure of the upper structure portion. Can be done,
The load transmission from the megastructure to the lower structure can be set arbitrarily according to the column structure of the lower structure, and as a result, the column structure of the lower structure and the column structure of the upper structure Can be set individually. Therefore, in addition to being able to stably support the upper structure through the seismic isolation layer with the megastructure, the seismic isolation of the upper structure can be achieved, and the plan of the upper and lower structures must be changed. Becomes possible. Furthermore, in the hierarchy where the megastructures are provided, it is also possible to implement a completely different floor plan from the upper and lower structural parts, and there is a change while improving the freedom of the floor plan as a whole building. It becomes possible. In addition, since the upper structure is installed on the megastructure having high vibration resistance via the seismic isolation layer, the seismic isolation function of the seismic isolation layer can be exhibited more efficiently.

A feature of the invention according to claim 2 is that, as exemplified in FIG. 1, the megastructure B2 is located on the first floor of the building body. According to the characteristic configuration of the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the first-floor portion of the ground, which is generally considered to have a high use efficiency with a large number of people coming and going. By using the mega structure, it is easy to secure a large space on the first floor above the ground, and it is possible to further improve the use efficiency. In addition, the seismic isolation layer is likely to have a small usable floor area due to the installation of the seismic isolation device. Compared with the base-isolated building provided on the first floor, it is possible to improve the use efficiency of the ground first floor, which is frequently used.

As shown in FIG. 2, the seismic isolation layer B3 comprises a slider 3A for supporting the upper structure B4 on the megastructure B2 so as to be slidable laterally. It is provided with a damper 3B for giving resistance to the lateral slide of the upper structure B4, and a stopper 3C for regulating the maximum lateral slide amount of the megastructure B2 and the upper structure B4 to a predetermined value. According to the characteristic configuration of the third aspect of the invention, in addition to the effect of the first or second aspect of the invention, the upper structure is supported by the slider with the action of the seismic force. It is possible to slide laterally, and the sliding movement absorbs the roll and reduces the seismic force on the upper structure. Also, the roll of the upper structure can be attenuated by the damper to make it smaller. The stopper allows the maximum lateral slide amount to be restricted within a range in which the slider or the damper can properly exert the seismic isolation function, and a more reliable seismic isolation function can be provided to the building. In addition, the slider damper
When part or all of the stoppers are configured separately, it is possible to individually perform maintenance (maintenance and replacement, addition, reduction, and enhancement of functions, etc.), thereby improving maintenance workability. It becomes possible. Of course, the slider / damper / stopper can also be formed integrally, in which case the installation space can be made compact.

[0008] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a base-isolated building B which is an embodiment of the base-isolated building of the present invention. The base-isolated building B is provided between a lower structural part B1 and an upper structural part B4. A seismic layer B3 is provided, and a megastructure B2 is provided between the lower structure B1 and the seismic isolation layer B3.

The lower structure section B1 is constituted by an underground hierarchical section having a store, a plaza, a parking lot, a machine room, and the like. Regarding the structure, various structures can be adopted, but in the present embodiment, the structure is a reinforced concrete structure. The column structure is different from the upper structure B4.

The megastructure B2 comprises a plurality of large columns 1 and large beams 2 made of steel, and a slab 2a formed on an upper portion thereof. Is composed. The lower structure B
1 is rigidly and integrally formed. In this embodiment, the first floor above the ground is configured to be used as a lobby. Since the first floor above the ground is made up of the megastructure B2, the floor height of the layer can be increased, and it is easy to configure a spacious space that is not present in other layers. Therefore, it is possible to efficiently use the first floor above the ground where many people enter and exit from the outside as a more distinctive space.

As shown in FIG. 2, the seismic isolation layer B3 includes a plurality of sliders 3A that support the upper structure B4 so as to be able to slide horizontally on the megastructure B2, and a horizontal slide of the upper structure B4. A plurality of dampers 3B for providing resistance, and a plurality of stoppers 3C for regulating the maximum lateral slide amount of the megastructure B2 and the upper structure B4 to a predetermined value are provided. As shown in FIG. 3, the slider 3A has a unidirectional slider 4 formed by slidably attaching a block sliding body 4b having a built-in bearing 4a to a rail 4c. It is configured to be able to perform movement and seismic isolation operation. Incidentally, the pair of one-way sliders 4 are integrated in a state where they are turned upside down and overlap each other, and are formed so that the rails 4c are located at the upper end and the lower end of the slider 3A. And
The upper rail 4c is fixed to the upper structure B4, and the lower rail 4c is fixed to the megastructure B2. Therefore, on megastructure B2,
The upper structure B4 can be supported via the slider 3A, and in this state, a horizontal surface (or a substantially horizontal surface)
, The relative sliding of the megastructure B2 and the upper structure B4 in any direction can be allowed. As shown in FIG. 4, the damper 3B has an upper plate portion of the main body 5 attached to an upper structure portion B4, and a lower plate portion of the main body 5 attached to the megastructure B2. The main body 5 includes a plurality of metal thin plates 5a and rubber thin plates 5a.
b are alternately laminated and integrated, and the respective thin plates 5a and 5
b are formed so that they can be freely displaced from one another in the horizontal direction, so that they follow the relative movement of the megastructure B2 and the upper structure portion B4 in the horizontal direction while resisting each other, and can exert a seismic isolation effect. Things. The vertical cores of the thin plates 5a and 5b are provided with lead rods 5c penetrating the respective thin plates 5a and 5b so that the damper effect against interlayer displacement of the thin plates 5a and 5b can be further enhanced. It is composed. The stopper 3C is, as shown in FIG.
A piston-shaped oil damper 6 is mounted horizontally (or almost horizontally), with one end fixed to the megastructure B2 and the other end fixed to the upper structure B4. And each stopper 3C is arrange | positioned in the state which expansion-contraction direction is orthogonal to planar view, respectively. Therefore, the stopper function can be exerted in all horizontal directions. Also, this oil damper 6
Is configured such that the resistance increases as the expansion and contraction force is applied, and the megastructure B2 and the upper structure B
The slide upper limit value can be regulated while smoothly supporting the relative movement with respect to the slide 4.

The upper structure section B4 is composed of a ground level section (two or more floors above ground) provided with an office, a hotel, a restaurant, a heliport, a machine room, and the like. Regarding the structure, various structures can be adopted, but in the present embodiment, the structure is a steel frame structure. In addition, about pillar arrangement,
It is different from the lower structure B1.

[Another Embodiment] Another embodiment will be described below.

<1> The respective structures of the lower structure portion B1, the megastructure B2, and the upper structure portion B4 are not limited to the reinforced concrete structure, the steel frame structure, and the like described in the above-described embodiment, but include known structures including these. It is possible to adopt a building structure. <2> The lower structure portion B1 is not limited to the one configured by the underground layer portion as described in the previous embodiment, and may be configured as shown in FIG.
As shown in FIG. 7, all of them may be constituted by a ground layer part, or as shown in FIG. 7, a part may be constituted by a ground layer part. Furthermore, in the above embodiment, the description of the foundation is omitted, but, for example, when a foundation such as a support pile is provided, the foundation is also referred to as the lower structure. Also,
Similarly, the megastructure B2 and the upper structure B
4 is not limited to the structure including the first-floor part and the above-ground part, respectively. As shown in FIGS. 8 and 9, the megastructure B2 is an underground structure part, and a part of the upper structure part B4 is formed. It may be an underground structure. <3> The megastructure B2 is not limited to the configuration of the large pillars 1 and the large beams 2 described in the above embodiment, and may be configured by a mega truss. <4> The seismic isolation layer B3 is not limited to the configuration including the slider 3A, the damper 3B, and the stopper 3C of the type described in the above embodiment, and the configuration including the slider, damper, and stopper of another type. It is also possible to use In addition, the present invention is not limited to the configuration including the slider 3A, the damper 3B, and the stopper 3C which are individually configured. May be provided with a seismic isolation device integrating the above. Furthermore, it is also possible to use the damper 3B alone described in the previous embodiment as a seismic isolation device. In short, any device having a seismic isolation function may be used. These are collectively called seismic isolation layer B3.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a base-isolated building.

FIG. 2 is a plan view showing a seismic isolation layer.

FIG. 3 is a partially cutaway perspective view showing a slider.

FIG. 4 is a partially cutaway perspective view showing a damper.

FIG. 5 is a side view showing a stopper.

FIG. 6 is a schematic side view showing a base-isolated building of another embodiment.

FIG. 7 is a schematic side view showing a base-isolated building of another embodiment.

FIG. 8 is a schematic side view showing a base-isolated building of another embodiment.

FIG. 9 is a schematic side view showing a base-isolated building of another embodiment.

[Explanation of symbols]

 3A Slider 3B Damper 3C Stopper B1 Lower structure B2 Mega structure B3 Seismic isolation layer B4 Upper structure

Continuation of the front page (72) Inventor Yasuyuki Kita 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Inside the Osaka head office of Takenaka Corporation (72) Inventor Kosuke Endo 4-1-1, Honcho, Chuo-ku, Osaka-shi, Osaka No. 13 Takenaka Corporation Osaka Main Store (72) Inventor Nobuyoshi Murai 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Institute (72) Inventor Hiroshi Hayami 8-chome Ginza, Chuo-ku, Tokyo No. 21 No. 1 Takenaka Corporation Tokyo Head Office

Claims (3)

[Claims] 1. A seismic isolation building having a seismic isolation layer between a lower structure part and an upper structure part, wherein a megastructure is provided between the lower structure part and the seismic isolation layer. A certain seismic isolated building. 2. The seismic isolation building according to claim 1, wherein the megastructure is located on the first floor of the building body. 3. The seismic isolation layer includes a slider that supports the upper structure so as to be able to slide laterally on the megastructure, a damper that imparts resistance to lateral sliding of the upper structure, the megastructure and the upper part. The seismic isolation building according to claim 1, further comprising a stopper that regulates a maximum amount of lateral sliding with the structure to a predetermined value.