JP4621332B2 - Seismic isolation method and seismic isolation structure for high-rise buildings or low-rise buildings with large aspect ratios - Google Patents

Description

[0001]
This invention is the field of seismic isolation methods and seismic isolation structure of high-rise buildings or the aspect ratio is large low-rise buildings pulling force caused by the rocking vibration during an earthquake (lifting phenomenon) occurs (hereinafter appropriately referred to as high-rise buildings, etc.) More specifically, the present invention relates to a seismic isolation method and a seismic isolation structure for a high-rise building or the like that can be implemented using a seismic isolation device such as a general-purpose laminated rubber.
[0002]
[Prior art]
Conventionally, as a technology for seismic isolation methods and seismic isolation structures for high-rise buildings or the like that generate pull-out force due to rocking vibration during an earthquake, for example, Japanese Utility Model Publication No. 6-18996 and Japanese Patent No. 2631486 (July 1997) (Published on May 16) and the like.
[0003]
As shown in FIG. 7A, all of the conventional techniques disclosed in the above publications are based on the technical idea that allows the building a to be greatly displaced in the horizontal direction, and do not cause displacement in the vertical direction as much as possible. Therefore, it is based on a structure in which the contact point between the building a and the foundation b that supports the building a is fastened in the vertical direction.
[0004]
[Problems to be solved by the present invention]
However, in the case of the high-rise building or the like, as shown in FIG. 7B, the rocking vibration based on the vertical displacement is dominant in the movement at the time of the earthquake, and a large pulling force acts on the seismic isolation device c. Therefore, in the case of the structure in which the building a and the foundation b are tightly connected as in the prior art, the seismic isolation device c and the foundation b that can withstand the pulling-out force are required, and can be coupled with a large number of rod-shaped members or prevented from falling. There is no choice but to use a laminated rubber body together. In addition, since the same pulling force acts on the pillar of the building a, it is necessary to construct the pillar as such with a high-strength structure, and there is a problem that the cost is very high.
[0005]
In addition, when the distance between adjacent buildings such as urban buildings is small, there is a risk that if the seismic isolation layer undergoes a large deformation, it will collide with adjacent buildings on the surface and cause a secondary disaster.
[0006]
By the way, in recent years, as disclosed in Japanese Patent Application No. 11-42759 (filed on February 22, 1999), the present applicant has provided a contact point between the high-rise building and the like and a supporting plate supporting the same. We have developed a seismic isolation method and seismic isolation structure that do not bind in the vertical direction and allow the pulling force associated with the rocking vibration based on the vertical displacement. This principle is as described in paragraphs [0017] to [0021] of the application specification and FIG. 4 of the drawings.
[0007]
However, a technique for implementing the seismic isolation method and the seismic isolation structure that allows the pulling force (lifting phenomenon) associated with the rocking vibration using a seismic isolation device such as a general-purpose laminated rubber has not yet been developed.
[0008]
The purpose of the present invention is to install a sliding bearing at a site where the pulling force is generated in a seismic isolation layer such as a high-rise building where a pulling force is generated due to rocking vibration at the time of an earthquake. It is to provide a seismic isolation method and a seismic isolation structure that are not affected by the pulling force by arranging the devices.
[0009]
The next object of the present invention is that pull-out force does not occur in pillars, foundation structures, and seismic isolation devices such as high-rise buildings, so that they can be easily designed, and the design and construction of seismic isolation device peripheral members The aim is to provide rational seismic isolation methods and structures that are rational and economically superior.
[0010]
As means for solving the problems of the prior art, a seismic isolation method for a high-rise building or a low-rise building having a large aspect ratio according to the invention described in claim 1 is:
A seismic isolation method for a high-rise building where a pulling force is generated due to rocking vibration during an earthquake or a low-rise building with a large aspect ratio ,
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure It is characterized in that a sliding bearing having a structure that allows lifting is installed, and a seismic isolation device is installed in a portion where no pulling force is generated.
[0011]
The seismic isolation method for a high-rise building or a low-rise building with a large aspect ratio according to the invention described in claim 2 is a seismic isolation method for a high-rise building or a low-rise building with a large aspect ratio that generates a pulling force due to rocking vibration during an earthquake. And
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure Install a sliding bearing with a structure that allows lifting and absorbs and relieves shocks during restoration of the high-rise building or low-rise building with a large aspect ratio , and installs a seismic isolation device at a site where pull-out force does not occur. Features.
[0012]
The seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio according to the invention described in claim 3 is a seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio that generates a pulling force due to rocking vibration during an earthquake. And
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure A sliding bearing having a structure that allows lifting is installed, and a seismic isolation device is installed at a site where no pulling force is generated.
[0013]
The seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio according to the invention described in claim 4 is a seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio that generates a pulling force due to rocking vibration during an earthquake. And
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure Sliding bearings with a structure that allows lifting and absorbs and relieves shock when restoring high-rise buildings or low-rise buildings with a large aspect ratio are installed, and seismic isolation devices are installed in areas where pull-out force does not occur It is characterized by.
[0014]
The invention described in claim 5 is the seismic isolation structure for a high-rise building or a low-rise building having a large aspect ratio described in claim 4, wherein the sliding bearing is composed of a sliding member and a mating member that can be separated in the vertical direction. the skids are a low-rise building high rise building or a large aspect ratio, or provided to one of a substructure, said mating member is provided to the other, either one of the skids and the mating member, Or both are provided with the elastic member which absorbs and relieve | moderates the impact at the time of restoration | reconstruction of a high-rise building etc., It is characterized by the above-mentioned.
[0015]
The invention described in claim 6 is the seismic isolation structure of the high-rise building or low-rise building having a large aspect ratio described in claim 5, wherein the elastic member is rubber, laminated rubber, vertical spring, or a combination thereof. It is characterized by that.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
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 described in claims 1 and 3.
[0017]
This seismic isolation structure 20 is preferably implemented in a high-rise building 1 that generates a pulling force associated with rocking vibration during an earthquake, and a pulling force that accompanies rocking vibration occurs in the seismic isolation layer 2 of the high-rise building 1 or the like. A sliding bearing 4 having a configuration that allows the high-rise building 1 to be lifted without transmitting the pulling force to the foundation structure 3 is installed in the part X. The seismic isolation device 5 is installed in the part Y where no pulling force is generated (the invention according to claim 3).
[0018]
The sliding bearing 4 and the seismic isolation device 5 are preferably installed immediately below the pillar 1a of the high-rise building 1 or the like, but are not limited thereto.
[0019]
As shown in FIG. 2, the sliding bearing 4 is composed of a sliding member 8 and a mating member 9 that can be separated in the vertical direction. The sliding member 8 is provided on a footing 6 on one side of a high-rise building or the like. The member 9 is provided on the footing 7 on the foundation structure 3 side. Further, above the sliding material 8, a relaxation member 10 such as rubber is provided via the metal plate 11 so that the sliding material 8 mainly starts moving smoothly when a horizontal force such as an earthquake occurs. It has been. Further, the upper surface of the relaxation member 10 is firmly in close contact with the lower surface of the mounting plate 12 that is fastened to the footing 6 on the one side of the high-rise building or the like by the anchor bolt 14. The lower surface of the mating member 9 is firmly in close contact with the upper surface of the mounting plate 13 that is fastened to the footing 7 on the side of the substructure 3 by the anchor bolts 14. The sliding material 8 may be provided on the foundation structure 3 side, and the mating member 9 may be provided on the high-rise building 1 side. Incidentally, the code | symbol 3a in a figure has shown the support pile.
[0020]
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.
[0021]
The seismic isolation method for constructing the seismic isolation structure 20 transmits the pulling force to the base structure 3 to the part X where the pulling force accompanying rocking vibration is generated in the seismic isolation layer 2 of the high-rise building 1 or the like. The sliding bearing 4 having a configuration that allows the high-rise building 1 to lift without being installed is installed, and the seismic isolation device 5 is installed at the site Y where no pulling force is generated (the invention according to claim 1). ).
[0022]
In this embodiment, the four portions of the sliding support 4 are installed at the four corners of the high-rise building 1 in the portion X where the pulling force due to the rocking vibration is generated at the time of the earthquake. However, the present invention is not limited to this. The part X is set in the structural design based on the aspect ratio of the high-rise building 1 or the like, and may be implemented, for example, in the places shown in FIGS. 3A and 3B. Incidentally, in FIG. 3A, the part X is a corner part of a high-rise building etc. 1 and a total of twelve sliding supports 4 are installed, and FIG. 3B is the outer part of the high-rise building etc. 1 A total of 16 sliding bearings 4 are installed and implemented. The same technical idea is applied to the following different embodiments.
[0023]
Therefore, the seismic isolation method and the seismic isolation structure for high-rise buildings and the like according to claim 1 and claim 3 are configured so that the sliding bearing 4 is free from the seismic isolation for an earthquake of a level that does not generate a pulling force accompanying rocking vibration. Since the device 5 supports the long-term load of the high-rise building 1 together with the device 5 and functions as a seismic isolation device by the sliding mechanism, it is possible to provide a stable seismic isolation structure 20 together with the seismic isolation device 5 having no pulling resistance. it can.
[0024]
Further, for a large earthquake in which a pulling force is generated due to rocking vibration, as shown in FIG. 4, the sliding member 8 and the mating member 9 of the sliding bearing 4 are separated from each other and the pulling force is applied to the foundation structure 3. Providing a seismic isolation structure 20 that allows the high-rise building 1 to lift without any transmission, and accordingly the center of gravity of the high-rise building 1 moves up and down, thereby consuming energy that enters the high-rise building 1 due to an earthquake. it can.
[0025]
Therefore, the seismic isolation device (laminated rubber) 5 and the peripheral members thereof are not affected by the reaction force due to the pulling resistance force, so the seismic isolation device 5 can be implemented with a general-purpose simple structure. Design can be performed easily.
[0026]
The configuration of the sliding 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 preferably implemented.
[0027]
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 described in claims 2 and 4.
[0028]
This seismic isolation structure 30 is provided in the base isolation structure 2 of the high-rise building 1 such as the high-rise building 1 without transmitting the pull-out force to the foundation structure 3 at the site X where the pull-out force due to the rocking vibration is generated during the earthquake. A sliding bearing 15 having a structure that allows floating and absorbs and relaxes an impact at the time of restoration of the high-rise building 1 is installed. The seismic isolation device 5 is installed in the part Y where no pulling force is generated (the invention according to claim 4).
[0029]
This 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 provided with an elastic member 16 that absorbs and relieves shock when the high-rise building 1 is restored, compared with the sliding bearing 4 shown in FIG. (Invention of claim 5) Specifically, the sliding support 15 has a metal plate 11 attached to the upper surface of the relaxation member 10, and a vertical spring (elastic member) 16 such as a disc spring is provided between the metal plate 11 and the upper mounting plate 12. (Invention of claim 6).
[0030]
Therefore, the seismic isolation structure using the sliding bearing 15 is in a state in which an initial compressive force is applied to the vertical spring 16 in a long-term load supporting state. A dowel pin 17 that transmits shearing force and allows vertical deformation is provided at the center of the vertical spring 16.
[0031]
The seismic isolation method for constructing the seismic isolation structure 30 transmits the pulling force to the base structure 3 to the part X where the pulling force accompanying rocking vibration is generated in the seismic isolation layer 2 of the high-rise building 1 or the like. The above-mentioned seismic isolation device is installed in a part where the pulling force is not generated and the sliding support 15 is configured to allow the high-rise building 1 to lift without absorbing and absorb and mitigate the impact when the high-rise building is restored. 5 is carried out (the invention according to claim 2).
[0032]
Therefore, the seismic isolation structure 30 according to claim 4 has substantially the same effect as the above-described seismic isolation structure 20 according to claim 3, and even when an earthquake in which a pulling force acts is generated. If it is smaller than the initial compression force, the sliding bearing 15 is deformed as shown in FIG. 5B, and the sliding member 8 and the mating member 9 can be kept in a stable floating state without being separated from each other.
[0033]
Further, if the pull-out force is larger than the initial compressive force, the sliding member 8 and the mating member 9 of the sliding bearing 15 are separated from each other as in the seismic isolation structure 20 according to claim 2, but provided on the sliding bearing 15. By the action of the vertical spring (elastic member) 16, it is possible to absorb and mitigate the impact when the high-rise building or the like 1 accompanying the rocking vibration is restored, and to prevent the sliding bearing 15 and its peripheral members from being damaged as much as possible. Can provide a basic seismic isolation structure.
[0034]
6A and 6B show different embodiments of the seismic isolation method and the seismic isolation structure of the high-rise building 1 described in claims 2 and 4.
[0035]
This 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 does not require the relaxing member 10 as compared with the sliding bearing 15 shown in FIG. 5, and instead of the vertical spring 16, the vertical rigidity is sufficiently softened in series. A slightly thicker rubber 19 (elastic member) is provided (inventions according to claims 5 and 6).
[0036]
Therefore, the seismic isolation structure using the sliding bearing 18 is in a state in which an initial compressive force is applied to the rubber 19 in a long-term load supporting state.
[0037]
Therefore, the seismic isolation structure 40 has substantially the same effect as the seismic isolation structure 30. That is, even if an earthquake in which a pulling force acts is applied, if the sliding 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.
[0038]
Further, if the pull-out force is larger than the initial compressive force, the sliding member 8 and the mating member 9 of the sliding bearing 18 are separated from each other as in the seismic isolation structure 20 according to claim 2, but provided on the sliding bearing 18. By the action of the rubber (elastic member) 19, it is possible to absorb and mitigate the impact at the time of restoration of the high-rise building or the like 1 due to the rocking vibration, and to suppress damage to the sliding bearing 18 and its peripheral members as much as possible, and to be permanent. Can provide a simple seismic isolation structure.
[0039]
[Effects of the present invention]
According to the seismic isolation method and the seismic isolation structure for high-rise buildings described in claims 1 to 6,
1) For earthquakes at a level where no pulling force is generated due to rocking vibration, the sliding bearing supports a long-term load on a high-rise building or the like as well as the seismic isolation device, and at the same time functions as a seismic isolation device by a sliding mechanism. A stable seismic isolation method and seismic isolation structure can be provided together with a seismic isolation device that does not have power.
2) For large earthquakes where a pulling force is generated due to rocking vibration, the sliding material of the sliding bearing and the mating member are separated from each other, and the pulling force is not transmitted to the foundation structure, allowing the high-rise buildings to lift. Accordingly, it is possible to provide a seismic isolation method and a seismic isolation structure that consumes energy that enters a high-rise building or the like due to an earthquake by moving the center of gravity of the high-rise building or the like up and down.
3) Since no pulling force is generated in pillars, foundation structures, and eventually seismic isolation devices of high-rise buildings, there is no damage to them. Along with that, it can be carried out with seismic isolation devices such as general-purpose laminated rubber, and the design of the seismic isolation devices etc. can be simplified, and the design and construction of the peripheral members of the seismic isolation devices can be greatly rationalized, making it extremely economical. Can provide seismic isolation structure.
4) In the case of a base-isolated structure in which an initial compressive force is applied by an elastic member such as a vertical spring or rubber provided on the sliding bearing, even if an earthquake in which a pulling force acts is generated, if it is smaller than the initial compressive 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 member and the mating member. Moreover, the impact at the time of restoration of a high-rise building etc. accompanying a rocking vibration can be absorbed and relieved, damage to 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 such as a high-rise building according to the present invention.
FIG. 2 is an elevational 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 seismic isolation structures such as high-rise buildings according to the present invention.
4 is an elevational view showing a state in which a pulling force is generated in the sliding bearing shown in FIG. 2. FIG.
FIG. 5A is an elevational view showing different embodiments of a sliding bearing of a seismic isolation structure such as a high-rise building according to the present invention, and B is an example of a state in which a pulling force is generated in the sliding bearing. FIG.
FIG. 6A is an elevational view showing different embodiments of the sliding bearing of the seismic isolation structure such as a high-rise building according to the present invention, and FIG. 6B is an example of a state in which the pulling force is generated in the sliding bearing. FIG.
FIGS. 7A and 7B are explanatory views of the principle of reducing seismic energy according to the present invention, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 High-rise building 2 Seismic isolation layer 3 Foundation structure 4 Sliding bearing 5 Seismic isolation device 8 Sliding material 9 Opposing member 16 Elastic member 20, 30, 40 Seismic isolation structure

Claims (6)

A seismic isolation method for a high-rise building where a pulling force is generated due to rocking vibration during an earthquake or a low-rise building with a large aspect ratio ,
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure A seismic isolation method for a high-rise building or a low-rise building with a large aspect ratio , characterized by installing a sliding bearing configured to allow lifting, and installing a seismic isolation device at a site where no pulling force is generated. A seismic isolation method for a high-rise building where a pulling force is generated due to rocking vibration during an earthquake or a low-rise building with a large aspect ratio ,
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure Install a sliding bearing with a structure that allows lifting and absorbs and relieves shocks during restoration of the high-rise building or low-rise building with a large aspect ratio , and installs a seismic isolation device at a site where pull-out force does not occur. A seismic isolation method for high-rise buildings or low-rise buildings with a large aspect ratio . A seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio that generates a pulling force due to rocking vibration during an earthquake,
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure A seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio , characterized in that a sliding bearing having a structure that allows lifting is installed, and a seismic isolation device is installed in a region where no pulling force is generated. A seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio that generates a pulling force due to rocking vibration during an earthquake,
At a site pulling force due to rocking vibrations during an earthquake in the seismic isolation layer of the high-rise building or a high aspect ratio low-rise buildings is generated, the low-rise buildings high-rise building or a high aspect ratio without transmitting a drawing force to the substructure Sliding bearings that are designed to absorb and mitigate shock when restoring high-rise buildings or low-rise buildings with a large aspect ratio are installed, and seismic isolation devices are installed in areas where pull-out force does not occur A seismic isolation structure for high-rise buildings or low-rise buildings with a large aspect ratio . The sliding bearing is composed of a sliding member and a mating member that can be separated in a vertical direction, and the sliding member is provided on one of a high-rise building, a low-rise building having a large aspect ratio, and a foundation structure, and the mating member Is provided on the other side, either one of the sliding material and the mating member, or both are provided with an elastic member that absorbs and relieves shock during restoration of a high-rise building, The seismic isolation structure of the high-rise building according to claim 4 or a low-rise building having a large aspect ratio . The seismic isolation structure for a high-rise building or a low-rise building with a large aspect ratio according to claim 5, wherein the elastic member is rubber, laminated rubber, vertical spring, or a combination thereof.

Images