JP2001329716A - Method and structure of base isolation of multistory building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a structure for base isolation of a multistory building capable of being suitably realized by a base isolator such as a general laminated rubber in a base isolation layer such as the multistory building where an extraction force is produced by a locking vibration at the time of an earthquake. SOLUTION: In the base isolation layer such as the multistory building, a sliding support allowing the multistory building to rise without transmitting an extraction force to a foundation structure is installed at a portion where the extraction force is produced by the locking vibration. The base isolator is installed at a portion where the extraction force is not produced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation method for a high-rise building in which a pull-out force (lifting phenomenon) due to rocking vibration occurs during an earthquake, and a building having a large aspect ratio even in a low-rise building (hereinafter referred to as a high-rise building). The present invention relates to a seismic isolation method for a high-rise building or the like and a seismic isolation structure that can be implemented using a seismic isolation device such as a general-purpose laminated rubber, which belongs to the technical field of the seismic isolation structure.

[0002]

2. Description of the Related Art Conventionally, as a technique of a seismic isolation method and a seismic isolation structure of a high-rise building in which a pull-out force is generated due to rocking vibration during an earthquake, for example, Japanese Utility Model Publication No. 6-18996 and Japanese Patent No. 2631486 are disclosed. (Issued on July 16, 1997) and the like.

As shown in FIG. 7A, all of the prior arts disclosed in the above-mentioned publications are based on a technical idea that allows a large displacement of a building a in the horizontal direction. In order to prevent the occurrence of the above-mentioned problem, a structure in which a contact point between a building a and a foundation b supporting the building a is vertically tied is basically used.

[0004]

However, in the case of the high-rise building or the like, the rocking vibration based on the vertical displacement is dominant in the motion during the earthquake as shown in FIG. A large pulling force acts on the device c. Therefore, in the case of a structure in which the building a and the foundation b are tied as in the prior art, the seismic isolation device c and the foundation b that can withstand the pulling force are required, and they are connected by a large number of rod-shaped members or are prevented from overturning. There is no other choice but to use a laminated rubber body. In addition, since the same pull-out force acts on the pillars of the building a, it is necessary to construct the pillars to have a structure having a relatively high strength, resulting in a problem that the cost is extremely increased.

[0005] In addition, when the space between adjacent buildings is small, such as a building in an urban area, if the seismic isolation layer undergoes a large deformation, there is a danger that the adjacent building will collide with the adjacent building on the ground surface and cause a secondary disaster. is there.

Incidentally, in recent years, the present applicant has filed Japanese Patent Application
As disclosed in Japanese Patent No. 42759 (filed on Feb. 22, 1999), the contact between the high-rise building or the like and the supporting plate for supporting the high-rise building is not tied up and down, and the displacement in the up and down direction is basically We developed a seismic isolation method and a seismic isolation structure that allow the pull-out force accompanying rocking vibration. This principle is as described in paragraphs [0017] to [0021] of the application specification and FIG. 4 of the drawings.

However, a technique for implementing a seismic isolation method and a seismic isolation structure that allows the pull-out force (lifting phenomenon) caused by the rocking vibration using a general-purpose laminated rubber or other seismic isolation device is still being developed. Absent.

An object of the present invention is to provide a sliding bearing at a site where a pull-out force is generated in a seismic isolation layer of a high-rise building or the like where a pull-out force is generated due to rocking vibration during an earthquake, and a general-purpose device is used at a portion where a pull-out force is not generated. To provide a seismic isolation method and a seismic isolation structure that are not affected by the pull-out force.

A second object of the present invention is to make it possible to easily design columns, foundation structures, and seismic isolation devices of high-rise buildings and the like, since no pull-out force is generated, and to design and construct peripheral members of the seismic isolation devices. And to provide an economically superior seismic isolation method and seismic isolation structure.

[0010]

As a means for solving the above-mentioned problems in the prior art, a method for seismic isolation of a high-rise building or the like according to the first aspect of the present invention provides a method for generating a pull-out force accompanying rocking vibration during an earthquake. A method for seismic isolation of a high-rise building or the like, in which a pull-out force due to rocking vibration is generated at the time of an earthquake in the seismic isolation layer of the high-rise building or the like, without transmitting the pull-out force to the substructure, and It is characterized in that a sliding bearing having a structure that allows uplift is installed, and a seismic isolation device is installed in a portion where no pull-out force is generated.

According to a second aspect of the present invention, there is provided a seismic isolation method for a high-rise building or the like in which a pull-out force is generated due to rocking vibration during an earthquake. Allows uplift of high-rise buildings, etc., without transmitting the pull-out force to the substructure at the site where the pull-out force due to rocking vibration occurs during the earthquake during the earthquake, and absorbs and mitigates the impact when the high-rise building, etc. is restored It is characterized in that a sliding bearing having the above configuration is installed, and a seismic isolation device is installed in a portion where no pull-out force is generated.

The seismic isolation structure of a high-rise building or the like according to the third aspect of the present invention is a seismic isolation structure of a high-rise building or the like in which a pull-out force is generated due to rocking vibration during an earthquake, and the seismic isolation of the high-rise building or the like is provided. Sliding bearings, which allow lifting of high-rise buildings without transmitting the pulling force to the substructure, are installed at the site where the pulling force due to the rocking vibration occurs during the earthquake during the earthquake, and where the pulling force is not generated Is characterized by the installation of seismic isolation devices.

The seismic isolation structure of a high-rise building or the like according to the invention described in claim 4 is a seismic isolation structure of a high-rise building or the like in which a pull-out force is generated due to rocking vibration during an earthquake, and the seismic isolation of the high-rise building or the like is provided. Allows uplift of high-rise buildings, etc., without transmitting the pull-out force to the substructure at the site where the pull-out force due to rocking vibration occurs during the earthquake during the earthquake, and absorbs and mitigates the impact when the high-rise building, etc. is restored The sliding bearing of the configuration is installed, and a seismic isolation device is installed in a portion where no pulling force is generated.

According to a fifth aspect of the present invention, in the seismic isolation structure of a high-rise building or the like according to the fourth aspect, the sliding bearing comprises a vertically movable sliding member and a mating member. Provided on one of a high-rise building or the like or a basic structure, and the other member is provided on the other, and one or both of the sliding material and the other member has an impact when restoring a high-rise building or the like. Characterized by being provided with an elastic member for absorbing and mitigating.

According to a sixth aspect of the present invention, in the seismic isolation structure of a high-rise building or the like according to the fifth aspect, the elastic member is rubber, laminated rubber, a vertical spring, or a combination thereof. I do.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an embodiment of a seismic isolation method and a seismic isolation structure for a high-rise building or the like 1 according to claims 1 and 3. FIG.

This seismic isolation structure 20 is suitably applied to a high-rise building or the like 1 in which a pull-out force is generated due to rocking vibration during an earthquake. Site X where
In addition, a sliding bearing 4 having a configuration that allows the rising of a high-rise building 1 or the like 1 without transmitting the pulling force to the substructure 3 is installed. A seismic isolation device 5 is used for the part Y where no pullout force is generated.
Is installed (the invention according to claim 3).

It is preferable that the sliding bearing 4 and the seismic isolation device 5 be installed at a position directly below the column 1a of a high-rise building 1 or the like.
It is not limited to this.

The slide bearing 4 is, as shown in FIG.
The sliding member 8 includes a sliding member 8 which can be separated in the vertical direction and a counterpart member 9. The sliding member 8 is provided on the footing 6 on the side of a high-rise building 1, and the counterpart member 9 is provided on the footing 7 on the substructure 3 side. ing. In addition, above the sliding material 8,
A relief member 10 made of rubber or the like is provided via a metal plate 11 so that the sliding member 8 mainly operates smoothly when a horizontal force such as an earthquake occurs. Further, the upper surface of the relaxation member 10 is attached to the mounting plate 12 which is fastened to the footing 6 of the high-rise building 1 by an anchor bolt 14.
And is firmly adhered to the lower surface. The lower surface of the mating member 9 is also firmly adhered to the upper surface of the mounting plate 13 which is tightly connected to the footing 7 on the substructure 3 by the anchor bolt 14. The sliding member 8 may be provided on the substructure 3 side, and the mating member 9 may be provided on the high-rise building 1 side. Incidentally, reference numeral 3a in the drawing indicates a support pile.

The seismic isolation device 5 is a so-called laminated rubber formed by alternately laminating metal plates and rubber, and is not particularly novel. Therefore, detailed drawings are omitted.

The seismic isolation method for constructing the seismic isolation structure 20 is based on a method of applying a pull-out force to a portion X of the high-rise building or the like 1 where a pull-out force is generated due to rocking vibration during an earthquake. In addition to installing the sliding bearing 4 configured to allow the rising of the high-rise building or the like 1 without transmitting it to the building 3, the seismic isolation device 5 is installed and implemented in a portion Y where no pull-out force is generated (claim 1). Described invention).

In the present embodiment, four sliding supports 4 are installed at the four corners of a high-rise building or the like 1 at the site X where a pulling force is generated due to rocking vibration during an earthquake, but the present invention is not limited to this. The part X is set on the structural design based on the aspect ratio of the high-rise building 1 or the like, and may be implemented in a place as shown in FIGS. 3A and 3B, for example. By the way, Figure 3
A is a case where the site X is a corner of a high-rise building or the like 1 and a total of 1
Two sliding bearings 4 are installed and implemented, and FIG.
The site X is the outer periphery of a high-rise building or the like 1 and a total of 16 sliding bearings 4 are installed and implemented. The same technical idea is applied to the following different embodiments.

Therefore, the seismic isolation method and the seismic isolation structure of a high-rise building or the like according to the first and third aspects of the present invention can be applied to an earthquake of a level that does not generate a pulling force due to rocking vibration.
The sliding bearing 4 supports the long-term load of the high-rise building or the like 1 together with the seismic isolation device 5 and at the same time functions as a seismic isolation device by a sliding mechanism, so that it is stable in combination with the seismic isolation device 5 having no pull-out resistance. A seismic isolation structure 20 can be provided.

For a large earthquake in which a pulling force is generated due to rocking vibration, as shown in FIG.
The sliding member 8 of the sliding bearing 4 and the mating member 9 are separated from each other, and the pulling-out force is not transmitted to the substructure 3 at all, and the rising of the high-rise building 1 is allowed. It is possible to provide a seismic isolation structure 20 that moves and thereby consumes energy that enters the high-rise building or the like 1 due to an earthquake.

Therefore, the seismic isolation device 5 (laminated rubber) 5 as well as the peripheral members thereof do not generate a reaction force due to the pull-out resistance, so that the seismic isolation device 5 can be implemented with a simple general-purpose structure. The peripheral members can be easily designed.

The structure of the slide bearing 4 is not limited to the illustrated example. As long as the sliding member 8 and the mating member 9 can be separated from each other, a sliding bearing using a bearing can be suitably implemented.

FIGS. 5A and 5B show an embodiment of a seismic isolation method and a seismic isolation structure for a high-rise building or the like 1 according to claims 2 and 4. FIG.

The seismic isolation structure 30 is provided at the portion X of the high-rise building or the like 1 where the pull-out force is generated due to the rocking vibration during the earthquake, without transmitting the pull-out force to the substructure 3. A sliding bearing 15 is provided, which is configured to allow the floating of the high-rise building 1 and the like, and absorb and mitigate the shock at the time of restoration of the high-rise building 1 or the like. The seismic isolation device 5 is installed at the site Y where no pull-out force is generated (the invention according to claim 4).

The seismic isolation structure 30 differs from the seismic isolation structure 20 only in the configuration of the sliding bearing. That is, the sliding bearing 15 shown in FIG. 5 is characterized in that, compared to the sliding bearing 4 shown in FIG. (The invention according to claim 5). Specifically, the sliding bearing 15 has a metal plate 11 attached to the upper surface of the relaxation member 10.
A vertical spring (elastic member) 16 such as a disc spring is provided between the upper mounting plate 12 and the upper mounting plate 12 (the invention according to claim 6).

Therefore, the seismic isolation structure using the sliding bearing 15 is in a state where the vertical spring 16 is subjected to the initial compressive force in the long-term load supporting state. At the center of the vertical spring 16, a dowel pin 17 that transmits shearing force and allows vertical deformation is provided.

The seismic isolation method for constructing the seismic isolation structure 30 is based on a method of applying a pull-out force to a portion X of the high-rise building or the like 1 where a pull-out force is generated due to rocking vibration in an earthquake. The sliding bearing 15 is constructed so as to allow the rising of the high-rise building or the like 1 without transmitting it to the building 3 and absorb and reduce the shock at the time of restoration of the high-rise building or the like. The seismic isolation device 5 is installed and implemented (the invention according to claim 2).

Therefore, the seismic isolation structure 30 according to claim 4 is provided.
The present invention has substantially the same effect as the above-described seismic isolation structure 20 as compared with the seismic isolation structure 20 according to the third aspect. 15 is a deformation as shown in FIG. 5B, and the sliding member 8 and the counterpart member 9 can be maintained in a stable floating state without being separated.

If the pulling-out force is larger than the initial compressive force, the sliding member 8 of the sliding bearing 15 and the mating member 9 are separated from each other as in the case of the seismic isolation structure 20 of the second aspect. By the action of the provided vertical spring (elastic member) 16, it is possible to absorb and mitigate the shock at the time of restoration of the high-rise building or the like 1 caused by the rocking vibration, and to minimize the damage of the sliding bearing 15 and its peripheral members as much as possible. It can suppress and provide a permanent seismic isolation structure.

FIGS. 6A and 6B show different embodiments of the seismic isolation method and the seismic isolation structure of the high-rise building or the like 1 described in claims 2 and 4. FIG.

The seismic isolation structure 40 differs from the seismic isolation structure 30 only in the configuration of the sliding bearing. That is, the sliding bearing 18 shown in FIG. 6 is different from the sliding bearing 15 shown in FIG.
As compared with the above, the relaxing member 10 becomes unnecessary,
Instead of this, a slightly thick rubber 19 (elastic member) which is connected in series with sufficient vertical rigidity is provided (the invention according to claims 5 and 6).

Therefore, the seismic isolation structure using the sliding bearing 18 is in a state where an initial compressive force is applied to the rubber 19 in a long-term load supporting state.

Therefore, the seismic isolation structure 40 has substantially the same operation and effect as the seismic isolation structure 30. That is, even if an earthquake in which a pull-out force acts occurs, if the initial compressive force is smaller than the initial compressive force, the sliding bearing 18 is deformed as shown in FIG. 6B, and the sliding member 8 and the mating member 9 are not separated from each other. A stable floating state can be maintained.

If the pulling force is greater than the initial compressive force, the sliding member 8 of the sliding bearing 18 and the mating member 9 are separated from each other as in the case of the seismic isolation structure 20 of the second aspect. By the action of the rubber (elastic member) 19 provided, it is possible to absorb and mitigate the shock at the time of restoration of the high-rise building or the like 1 caused by the rocking vibration.
8 and its peripheral members can be minimized to provide a permanent seismic isolation structure.

[0039]

According to the seismic isolation method and the seismic isolation structure of a high-rise building or the like according to the first to sixth aspects of the present invention: 1) Sliding with respect to an earthquake of a level at which no pulling force due to rocking vibration is generated. The bearing supports the long-term load of a high-rise building etc. together with the seismic isolation device, and at the same time functions as a seismic isolation device by a sliding mechanism. Can be provided. 2) In the case of a large earthquake in which a pulling force is generated due to rocking vibration, the sliding material of the sliding bearing is separated from the mating member, and the pulling force is not transmitted at all to the substructure. Accordingly, it is possible to provide a seismic isolation method and a seismic isolation structure in which the center of gravity of a high-rise building or the like moves up and down, thereby consuming energy entering the high-rise building or the like due to an earthquake. 3) Since no pull-out force is generated in columns, foundation structures, and seismic isolation devices of high-rise buildings, they are not damaged. Along with this, the seismic isolation device such as a general-purpose laminated rubber can be implemented, the design of the seismic isolation device, etc. can be easily performed, and the design and construction of the peripheral members of the seismic isolation device can be greatly rationalized, which is extremely economical. A seismic isolation structure can be provided. 4) In the case of a seismic isolation structure in which an initial compression force is applied by an elastic member such as a vertical spring or rubber provided on a sliding bearing, even if an earthquake in which a pull-out force acts occurs, if the earthquake is smaller than the initial compression force, The sliding bearing can provide a seismic isolation method and a seismic isolation structure that maintain a stable floating state as a whole without separating the sliding material and the mating member. In addition, the shock at the time of restoration of a high-rise building or the like due to the rocking vibration can be absorbed and reduced, the breakage of the sliding bearing and its peripheral members can be suppressed as much as possible, and a permanent seismic isolation structure can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an embodiment of a seismic isolation structure for a high-rise building or the like according to the present invention.

FIG. 2 is an elevation view showing a sliding bearing of a seismic isolation structure such as a high-rise building according to the present invention.

FIGS. 3A and 3B are plan views schematically showing different embodiments of the seismic isolation structure of a high-rise building or the like according to the present invention.

FIG. 4 is an elevational view showing a state where a pulling force is generated in the sliding bearing shown in FIG. 2;

FIG. 5A is an elevation view showing another embodiment of the sliding bearing of the seismic isolation structure of a high-rise building or the like according to the present invention, and FIG.
FIG. 4 is an elevation view showing an example of a state in which a pulling force is generated in the sliding bearing.

FIG. 6A is an elevation view showing a different embodiment of a sliding bearing of a seismic isolation structure such as a high-rise building according to the present invention, and FIG.
FIG. 4 is an elevation view showing an example of a state in which a pulling force is generated in the sliding bearing.

7A is a diagram illustrating a conventional principle, and FIG. 7B is a diagram illustrating a principle of reducing seismic energy according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-rise building etc. 2 Seismic isolation layer 3 Foundation structure 4 Sliding bearing 5 Seismic isolation device 8 Sliding material 9 Counterpart member 16 Elastic member 20, 30, 40 Seismic isolation structure

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Hamaguchi 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Center, Takenaka Corporation (72) Inventor Keizo Iwashita 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Institute (72) Inventor Masafumi Yamamoto 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Institute (72) Inventor Nagahito Kibayashi Ginza 8-chome, Chuo-ku, Tokyo No. 21 No. 1 Takenaka Corporation Tokyo head office F-term (reference) 3J048 AA03 BA03 BA08 BE12 BG04 DA01 EA38 3J059 AE10 BA43 BA54 GA42

Claims (6)

[Claims] 1. A seismic isolation method for a high-rise building or the like in which a pull-out force due to rocking vibration is generated during an earthquake, wherein a part of the seismic-isolated layer such as the high-rise building where a pull-out force is generated due to rocking vibration during an earthquake, It is characterized by installing a sliding bearing of a structure that allows lifting of a high-rise building etc. without transmitting the pulling force to the substructure, and installing a seismic isolation device in a part where the pulling force does not occur,
Seismic isolation method for high-rise buildings. 2. A seismic isolation method for a high-rise building or the like in which a pull-out force is generated due to rocking vibration during an earthquake, wherein a part of the seismic-isolated layer of the high-rise building or the like where a pull-out force is generated due to rocking vibration during an earthquake, A sliding bearing with a structure that allows lifting of high-rise buildings etc. without absorbing the pull-out force to the substructure, absorbs and reduces the impact of restoration of the high-rise buildings, etc., and installs the bearings where pull-out force does not occur Is a seismic isolation method for high-rise buildings, etc., characterized by installing seismic isolation devices. 3. A seismic isolation structure for a high-rise building or the like in which a pull-out force is generated due to rocking vibration during an earthquake, wherein a part of the seismic-isolated layer of the high-rise building or the like where a pull-out force is generated due to rocking vibration during an earthquake, Sliding bearings that allow lifting of high-rise buildings and the like without transmitting the pulling force to the substructure are installed, and seismic isolation devices are installed at locations where no pulling force is generated.
Seismic isolation structure for high-rise buildings. 4. A seismic isolation structure for a high-rise building or the like in which a pull-out force due to rocking vibration is generated during an earthquake, wherein a part of the seismic-isolated layer of the high-rise building or the like where a pull-out force due to rocking vibration is generated in an earthquake. Sliding bearings that allow lifting of high-rise buildings etc. without transmitting the pull-out force to the substructure and absorb and mitigate the impact of restoration of the high-rise buildings etc. are installed, and where no pull-out force is generated A seismic isolation structure for high-rise buildings, etc., which is equipped with seismic isolation devices. 5. A sliding bearing comprising a sliding member capable of being separated in a vertical direction and a mating member, wherein said sliding member is provided on one of a high-rise building or the like and a foundation structure, and said mating member is provided on the other. The elastic member which absorbs and reduces the impact at the time of restoration of a high-rise building or the like is provided on one or both of the sliding material and the mating member. Seismic isolation structure for high-rise buildings etc. as described. 6. The seismic isolation structure of a high-rise building or the like according to claim 5, wherein the elastic member is rubber, laminated rubber, a vertical spring, or a combination thereof.