JP2021183764A - Base isolation structure - Google Patents

Base isolation structure Download PDF

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JP2021183764A
JP2021183764A JP2020088791A JP2020088791A JP2021183764A JP 2021183764 A JP2021183764 A JP 2021183764A JP 2020088791 A JP2020088791 A JP 2020088791A JP 2020088791 A JP2020088791 A JP 2020088791A JP 2021183764 A JP2021183764 A JP 2021183764A
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seismic isolation
foundation
isolation structure
building
receiving portion
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JP7083525B2 (en
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一生 新熊
Kazuo Niikuma
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Masa Labo
Masa Labo Co Ltd
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Masa Labo
Masa Labo Co Ltd
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Abstract

To provide a base isolation structure with a simple configuration at a low cost.SOLUTION: A base isolation structure of a building has a foundation and a plurality of columns standing on the foundation as structural materials. The base isolation structure of a building comprises: a sill material placed horizontally at the lower parts of the columns; and a base isolation part provided between the lower end of the column and the foundation.SELECTED DRAWING: Figure 1

Description

本発明は、建築物における免震構造に関するものである。 The present invention relates to a seismic isolation structure in a building.

従来から、建築物の免震構造として、基礎と土台の間に免震装置を設ける構成が知られている。 Conventionally, as a seismic isolation structure of a building, a configuration in which a seismic isolation device is provided between a foundation and a foundation has been known.

特開２００７−２３２０９１号公報Japanese Unexamined Patent Publication No. 2007-232091

従来知られた免震構造は、複数の免震装置で土台より上部の構造の荷重を受けること、ならびに上部構造の一体性を確保するため、高い剛性を有する鉄骨架台等が必要となる。
しかし、剛性の高い鉄骨架台は高価であり、免震構造の普及の弊害となっているという問題がある。
また、免震装置の構成が複雑なため高価であることも、免震構造の普及の弊害となっている。 Conventionally known seismic isolation structures require a steel frame base having high rigidity in order to receive the load of the structure above the base by a plurality of seismic isolation devices and to secure the integrity of the superstructure.
However, there is a problem that a highly rigid steel frame is expensive and has an adverse effect on the spread of seismic isolation structures.
In addition, the complicated configuration of the seismic isolation device makes it expensive, which also hinders the spread of the seismic isolation structure.

本発明は、簡易な構成で低コストな免震構造を提供することを目的とする。 An object of the present invention is to provide a low-cost seismic isolation structure with a simple configuration.

上記目的を達成するためになされた本願の第１発明は、基礎と、基礎上に立設する複数の柱を構造材とする建築物の免震構造であって、柱の下部間に水平に配置する土台材と、柱の下端と基礎との間に設ける免震部と、からなる、建築物の免震構造を提供する。
本願の第２発明は、第１発明の建築物の免震構造において、免震部は、柱又は基礎のいずれか一方の構造材に設ける球面体と、他方の構造材に設ける受け部と、からなり、球面体は、一方の構造材から他方の構造材に対して突出する球面を有し、受け部は、球面体と接触する面が、球面に沿う方向に湾曲していることを特徴とする、建築物の免震構造を提供する。
本願の第３発明は、第２発明の建築物の免震構造において、前記受け部は、上面が湾曲した皿状体を基礎上に載置して構成することを特徴とする、建築物の免震構造を提供する。
本願の第４発明は、第２発明の建築物の免震構造において、前記受け部は、上面が湾曲した皿状体を基礎に埋設して構成することを特徴とする、建築物の免震構造を提供する。
本願の第５発明は、第２発明の建築物の免震構造において、前記受け部は、基礎の上面を凹陥して構成することを特徴とする、建築物の免震構造を提供する。
本願の第６発明は、第１発明の建築物の免震構造において、免震部は、すべり支承であることを特徴とする、建築物の免震構造を提供する。
本願の第７発明は、第１発明乃至第６発明のいずれかの建築物の免震構造において、一部の柱の下端と基礎との間に設ける免震部に代えて、摩擦材からなる減衰部材を設けることを特徴とする、
建築物の免震構造を提供する。 The first invention of the present application made to achieve the above object is a seismic isolation structure of a building having a foundation and a plurality of pillars erected on the foundation as structural materials, and is horizontally between the lower parts of the pillars. Provided is a seismic isolation structure of a building consisting of a base material to be arranged and a seismic isolation part provided between the lower end of a pillar and a foundation.
According to the second invention of the present application, in the seismic isolation structure of the building of the first invention, the seismic isolation portion includes a spherical body provided on one of the structural materials of the pillar or the foundation, and a receiving portion provided on the other structural material. The spherical body is composed of a spherical body having a spherical surface protruding from one structural material to the other structural material, and the receiving portion is characterized in that the surface in contact with the spherical body is curved in a direction along the spherical body. To provide a seismic isolation structure for buildings.
The third aspect of the present invention is the seismic isolation structure of the building of the second invention, wherein the receiving portion is configured by placing a dish-shaped body having a curved upper surface on a foundation. Provides a seismic isolation structure.
The fourth invention of the present application is the seismic isolation structure of the building of the second invention, wherein the receiving portion is configured by burying a dish-shaped body having a curved upper surface in the foundation. Provide the structure.
A fifth aspect of the present invention provides a seismic isolation structure for a building according to the second aspect, wherein the receiving portion is configured by recessing the upper surface of the foundation.
The sixth invention of the present application provides the seismic isolation structure of a building, characterized in that the seismic isolation portion is a sliding bearing in the seismic isolation structure of the building of the first invention.
The seventh invention of the present application comprises a friction material in place of the seismic isolation portion provided between the lower end of some columns and the foundation in the seismic isolation structure of the building according to any one of the first to sixth inventions. It is characterized by providing a damping member.
Provides a seismic isolation structure for buildings.

本発明は、上記した課題を解決するための手段により、次のような効果の少なくとも一つを得ることができる。
（１）免震部を設ける一部の柱に建築物の荷重を集中させることで、転倒を抑制するカウンターウェイトを大きくでき、また、免震部の個数も減らせるため、安価となる。
（２）免震部は、球面体と受け部とを組み合わせた簡易な構成であり、安価である。
（３）免震部を球面体で構成することにより、上部構造の自重によって元の位置に復元されるため、別途、復元機構を設ける必要がない。
（４）皿状体を埋設又は基礎の上面を凹陥して受け部を形成し、受け部の端縁を基礎の上面と同一平面とすることにより、柱が受け部４２の範囲から外れるような振動であっても、柱下部を、平坦であり強度の高いコンクリート製の基礎で連続して支持することで、大振動時のフェールセーフとなる。 The present invention can obtain at least one of the following effects by means for solving the above-mentioned problems.
(1) By concentrating the load of the building on some of the pillars where the seismic isolation section is provided, the counterweight that suppresses the fall can be increased, and the number of seismic isolation sections can be reduced, so that the cost is low.
(2) The seismic isolation part has a simple structure in which a spherical body and a receiving part are combined, and is inexpensive.
(3) By forming the seismic isolation portion with a spherical body, the seismic isolation portion is restored to the original position by the weight of the superstructure, so that it is not necessary to separately provide a restoration mechanism.
(4) By burying a dish-shaped body or recessing the upper surface of the foundation to form a receiving portion and making the edge of the receiving portion flush with the upper surface of the foundation, the pillar is out of the range of the receiving portion 42. Even in the case of vibration, by continuously supporting the lower part of the column with a flat and high-strength concrete foundation, it becomes fail-safe at the time of large vibration.

本発明の実施例１の免震構造の説明図Explanatory drawing of seismic isolation structure of Example 1 of this invention 本発明の免震部の説明図Explanatory drawing of seismic isolation part of this invention 本発明の実施例１の免震構造の作用状態の説明図Explanatory drawing of working state of seismic isolation structure of Example 1 of this invention 束に免震部を設けた状態の説明図Explanatory drawing of the state where the seismic isolation part is provided in the bundle その他実施例に係る免震部の説明図（１）Explanatory drawing of the seismic isolation part according to other examples (1) その他実施例に係る免震部の説明図（２）Explanatory drawing of the seismic isolation part according to other examples (2) その他実施例に係る免震部の説明図（３）Explanatory drawing of the seismic isolation part according to other examples (3) その他実施例に係る免震部の説明図（４）Explanatory drawing of the seismic isolation part according to other examples (4) 減衰部材を設ける場合の免震構造の説明図Explanatory drawing of seismic isolation structure when damping member is provided 減衰部材の説明図（１）Explanatory drawing of damping member (1) 減衰部材の説明図（２）Explanatory drawing of damping member (2)

以下、図面を参照しながら本発明の免震構造を詳細に説明する。 Hereinafter, the seismic isolation structure of the present invention will be described in detail with reference to the drawings.

［実施例１］
（１）本発明の対象となる建築物の構造
本発明の免震構造の対象となる建築物は、基礎１と、基礎１上に立設する複数の柱２を構造材として含むものである（図１）。
基礎１は一体性の確保に優れたベタ基礎が好適である。
立設した柱２の下部間には、土台材３を水平に配置し、柱２と土台材３とを強固に固定することにより、上部構造を一体とする。
土台材３上には、柱２以外の管柱５を設置してもよい。 [Example 1]
(1) Structure of a building subject to the present invention The building subject to the seismic isolation structure of the present invention includes a foundation 1 and a plurality of pillars 2 erected on the foundation 1 as structural materials (Fig.). 1).
The foundation 1 is preferably a solid foundation that is excellent in ensuring integrity.
The base material 3 is horizontally arranged between the lower parts of the erected pillars 2, and the pillars 2 and the base material 3 are firmly fixed to integrate the superstructure.
A pipe pillar 5 other than the pillar 2 may be installed on the base material 3.

（２）免震部４
免震部４は、基礎１と柱２との間に設けることにより、基礎１から柱２及び建築物の上部構造に伝達する振動を低減するものである。
免震部４を設ける一部の柱２に建築物の荷重を集中させることで、転倒を抑制するカウンターウェイトを大きくでき、また、免震部４の個数も減らせるため、安価となる。 (2) Seismic isolation section 4
The seismic isolation portion 4 is provided between the foundation 1 and the pillar 2 to reduce the vibration transmitted from the foundation 1 to the pillar 2 and the superstructure of the building.
By concentrating the load of the building on a part of the pillars 2 where the seismic isolation section 4 is provided, the counterweight for suppressing the fall can be increased, and the number of the seismic isolation sections 4 can be reduced, so that the cost is low.

（２．１）免震部４の形態
免震部４は、柱２の下端に設ける球面体４１と、基礎１に設ける受け部４２と、からなる（図２）。
球面体４１は下面を球面状としたステンレスやアルミニウム製の部材であり、中実が好ましい。また、球面体４１は上面に柱２の下端に嵌合する嵌合孔を有する。
受け部４２の上面は、球面体４１に沿う方向に湾曲した球面状である。
受け部４２は、ステンレス製の皿状体であり、基礎１上に載置して構成する。
球面体４１と受け部４２それぞれの接触面は、低摩擦係数かつ耐久性を確保することができる表面処理を行う。
免震部４は、球面体４１と受け部４２とを組み合わせた簡易な構成であり、安価である。
受け部４２の上面に球面体４１を設けた柱２を載置し、受け部４２により柱２及び球面体４１を受けることで、受け部４２の上面に沿った方向に柱２が移動可能となる。 (2.1) Form of Seismic Isolation Division 4 The seismic isolation portion 4 includes a spherical body 41 provided at the lower end of the pillar 2 and a receiving portion 42 provided on the foundation 1 (FIG. 2).
The spherical body 41 is a member made of stainless steel or aluminum having a spherical lower surface, and is preferably solid. Further, the spherical body 41 has a fitting hole on the upper surface thereof to be fitted to the lower end of the pillar 2.
The upper surface of the receiving portion 42 has a spherical shape curved in a direction along the spherical body 41.
The receiving portion 42 is a dish-shaped body made of stainless steel, and is configured by placing it on the foundation 1.
The contact surfaces of the spherical body 41 and the receiving portion 42 are surface-treated so as to have a low coefficient of friction and durability.
The seismic isolation portion 4 has a simple configuration in which a spherical body 41 and a receiving portion 42 are combined, and is inexpensive.
By placing a pillar 2 provided with a spherical body 41 on the upper surface of the receiving portion 42 and receiving the pillar 2 and the spherical body 41 by the receiving portion 42, the pillar 2 can move in the direction along the upper surface of the receiving portion 42. Become.

（３）免震構造の作用
地震時には、球面体４１が受け部４２上を移動することにより、柱２及び建築物の上部構造に基礎１から伝達する振動を低減する（図３）。
立設した柱２の下部間には土台材３を配置し、柱２と土台材３とは強固に固定されている。
このため、地震時に球面体４１が受け部４２上を移動する際に、上部構造は水平状態を保持したまま、球面体４１が受け部４２の球面に沿って移動する。
受け部４２を球面状に形成することにより、振動が収まると、建築物の上部構造の自重により球面体４１が受け部４２の中央に戻ることで、上部構造も元の位置に復元される。
上部構造の自重によって元の位置に復元されるため、別途、復元機構を設ける必要がない。 (3) Action of seismic isolation structure During an earthquake, the spherical body 41 moves on the receiving portion 42 to reduce the vibration transmitted from the foundation 1 to the pillar 2 and the superstructure of the building (FIG. 3).
A base material 3 is arranged between the lower portions of the erected pillars 2, and the pillars 2 and the base material 3 are firmly fixed to each other.
Therefore, when the spherical body 41 moves on the receiving portion 42 during an earthquake, the spherical body 41 moves along the spherical surface of the receiving portion 42 while maintaining the horizontal state of the superstructure.
By forming the receiving portion 42 into a spherical shape, when the vibration is settled, the spherical body 41 returns to the center of the receiving portion 42 due to the weight of the superstructure of the building, and the superstructure is also restored to the original position.
Since it is restored to its original position by the weight of the superstructure, it is not necessary to separately provide a restoration mechanism.

［その他の実施例］
（１）束を有する場合
土台材３の下部に束３１を有する建築物の場合、基礎１と束３１との間に免震部４を設ける（図４）。
束３１を有することで建築物の荷重が分散され、免震部４を小さくすることができる。
（２）免震部４のその他の形態
実施例１では、免震部４は皿状体を基礎１上に載置して構成したが、基礎１に皿状体を埋設して構成してもよい（図５）。このとき、皿状体は、湾曲した上面の端縁が基礎１の上面と同一平面となるように構成する。
受け部４２の端縁が基礎１の上面と同一平面であるため、柱２が受け部４２の範囲から外れるような振動であっても、柱２下部を、平坦であり強度の高いコンクリート製の基礎１で連続して支持できるため、大振動時のフェールセーフとなる。 [Other Examples]
(1) When having a bundle In the case of a building having a bundle 31 at the lower part of the base material 3, a seismic isolation portion 4 is provided between the foundation 1 and the bundle 31 (FIG. 4).
By having the bundle 31, the load of the building is dispersed, and the seismic isolation portion 4 can be made smaller.
(2) Other Forms of Seismic Isolation Unit 4 In the first embodiment, the seismic isolation unit 4 is configured by placing a dish-shaped body on the foundation 1, but the seismic isolation portion 4 is configured by embedding the dish-shaped body in the foundation 1. It may be good (Fig. 5). At this time, the dish-shaped body is configured so that the edge of the curved upper surface is flush with the upper surface of the foundation 1.
Since the edge of the receiving portion 42 is flush with the upper surface of the foundation 1, the lower portion of the pillar 2 is made of flat and high-strength concrete even if the pillar 2 vibrates outside the range of the receiving portion 42. Since it can be continuously supported by the foundation 1, it is fail-safe at the time of large vibration.

また、免震部４は、基礎１の上面を凹陥して形成してもよい（図６）。このとき、湾曲した上面を樹脂によりコーティングしたり、上面に沿ってステンレス板を配置したりしてもよい。
コンクリート製の基礎１の上面を凹陥するため、樹脂によるコーティングやステンレス板であっても基礎１のコンクリートの材料特性と合わせることで、上部構造を支持可能な強度の受け部４２となるため、皿状体に比べて安価に受け部４２を構築することができる。
そして、基礎１の上面を凹陥するため、受け部４２の端縁が基礎１の上面と同一平面となり、上述の実施例のフェールセーフの効果も有する。 Further, the seismic isolation portion 4 may be formed by recessing the upper surface of the foundation 1 (FIG. 6). At this time, the curved upper surface may be coated with resin, or a stainless steel plate may be arranged along the upper surface.
Since the upper surface of the concrete foundation 1 is recessed, even if it is coated with resin or a stainless steel plate, by combining it with the material properties of the concrete of the foundation 1, it becomes a receiving part 42 with strength that can support the superstructure. The receiving portion 42 can be constructed at a lower cost than the shaped body.
Since the upper surface of the foundation 1 is recessed, the edge of the receiving portion 42 becomes the same plane as the upper surface of the foundation 1, and the fail-safe effect of the above-described embodiment is also obtained.

さらに、免震部４は受け部４２を平面状としてもよいし、球面体４１と受け部４２に代えてすべり支承４３を用いてもよい（図７）。
受け部４２を平面状とする場合や、すべり支承を用いる場合、上部構造は水平方向に移動する。このため、別途復元機構を設ける。
復元機構としては、バネやゴム、油圧や空気圧で作動するジャッキ、磁石等、従来知られているものを用いる。 Further, the seismic isolation portion 4 may have a flat receiving portion 42, or a sliding bearing 43 may be used instead of the spherical body 41 and the receiving portion 42 (FIG. 7).
When the receiving portion 42 is made flat or when a sliding bearing is used, the superstructure moves in the horizontal direction. Therefore, a separate restoration mechanism is provided.
As the restoration mechanism, conventionally known ones such as springs, rubber, jacks operated by hydraulic pressure or pneumatic pressure, magnets, etc. are used.

この他、免震部４は、柱２の下端に設ける球面体４１を基礎１の上面に設け、受け部４２を柱２の下端に設けてもよい（図８）。 In addition, in the seismic isolation portion 4, a spherical body 41 provided at the lower end of the pillar 2 may be provided on the upper surface of the foundation 1, and the receiving portion 42 may be provided at the lower end of the pillar 2 (FIG. 8).

（２）減衰部材６の設置
上記実施例は、全ての柱２の下に免震部４を設けたが、複数の免震部４のうちの一部を、減衰部材６に変更してもよい（図９）。
減衰部材６は、柱２の下端に設ける球面体６１と、基礎１の上面に設け、又は基礎１に埋設する受け部６２と、からなる（図１０）。
球面体６１は実施例１の球面体４１と同様に下面を球面状としたステンレスやアルミニウム製の部材であり、中実が好ましい。また、球面体６１は上面に柱２の下端に嵌合する嵌合孔を有する。
受け部６２は実施例１の受け部４２の上面を表面処理により摩擦係数を大きくし、又は上面に摩擦材を配置して構成する。
減衰部材６は、振動によって球面体６１が受け部６２上を移動すると、球面体６１と受け部６２間の摩擦によって振動のエネルギーを摩擦熱に変換する。このため、減衰部材６を設けることにより、早く振動を抑えることができる。
また、免震部４の形態により上部構造が水平に移動する場合には、減衰部材６は、受け部４２を平板状の摩擦材としたものや、柱２の下面と基礎１の上面にそれぞれ配置する平板状の摩擦材を組み合わせたものとする（図１１）。 (2) Installation of damping member 6 In the above embodiment, the seismic isolation section 4 is provided under all the pillars 2, but even if a part of the plurality of seismic isolation sections 4 is changed to the damping member 6. Good (Fig. 9).
The damping member 6 includes a spherical body 61 provided at the lower end of the pillar 2 and a receiving portion 62 provided on the upper surface of the foundation 1 or embedded in the foundation 1 (FIG. 10).
The spherical body 61 is a member made of stainless steel or aluminum having a spherical lower surface as in the spherical body 41 of the first embodiment, and is preferably solid. Further, the spherical body 61 has a fitting hole on the upper surface thereof to be fitted to the lower end of the pillar 2.
The receiving portion 62 is configured by increasing the friction coefficient by surface-treating the upper surface of the receiving portion 42 of the first embodiment or by arranging a friction material on the upper surface.
When the spherical body 61 moves on the receiving portion 62 due to the vibration, the damping member 6 converts the energy of the vibration into frictional heat by the friction between the spherical body 61 and the receiving portion 62. Therefore, by providing the damping member 6, vibration can be suppressed quickly.
Further, when the superstructure moves horizontally due to the form of the seismic isolation portion 4, the damping member 6 has a receiving portion 42 as a flat friction material, or on the lower surface of the column 2 and the upper surface of the foundation 1, respectively. It is assumed that the flat friction materials to be arranged are combined (FIG. 11).

１ 基礎
２ 柱
３ 土台材
３１ 束
４ 免震部
４１ 球面体
４２ 受け部
４３ すべり支承
５ 管柱
６ 減衰部材
６１ 球面体
６２ 受け部
６３ 摩擦材 1 Foundation 2 Pillar 3 Base material 31 Bundle 4 Seismic isolation part 41 Spherical body 42 Receiving part 43 Sliding bearing 5 Pipe pillar 6 Damping member 61 Spherical body 62 Receiving part 63 Friction material

Claims (7)

基礎と、基礎上に立設する複数の柱を構造材とする建築物の免震構造であって、
柱の下部間に水平に配置する土台材と、
柱の下端と基礎との間に設ける免震部と、からなる、
建築物の免震構造。 It is a seismic isolation structure of a building whose structural material is a foundation and multiple pillars erected on the foundation.
The base material to be placed horizontally between the bottoms of the pillars,
It consists of a seismic isolation part provided between the lower end of the pillar and the foundation.
Seismic isolation structure of the building. 請求項１に記載の建築物の免震構造において、
免震部は、柱又は基礎のいずれか一方の構造材に設ける球面体と、他方の構造材に設ける受け部と、からなり、
球面体は、一方の構造材から他方の構造材に対して突出する球面を有し、
受け部は、球面体と接触する面が、球面に沿う方向に湾曲していることを特徴とする、
建築物の免震構造。 In the seismic isolation structure of the building according to claim 1,
The seismic isolation part consists of a spherical body provided on one of the structural materials of the pillar or the foundation and a receiving part provided on the other structural material.
The spherical body has a spherical surface that protrudes from one structural material to the other structural material.
The receiving portion is characterized in that the surface in contact with the spherical body is curved in a direction along the spherical surface.
Seismic isolation structure of the building. 請求項２に記載の建築物の免震構造において、
前記受け部は、上面が湾曲した皿状体を基礎上に載置して構成することを特徴とする、
建築物の免震構造。 In the seismic isolation structure of the building according to claim 2.
The receiving portion is characterized in that a dish-shaped body having a curved upper surface is placed on the foundation.
Seismic isolation structure of the building. 請求項２に記載の建築物の免震構造において、
前記受け部は、上面が湾曲した皿状体を基礎に埋設して構成することを特徴とする、
建築物の免震構造。 In the seismic isolation structure of the building according to claim 2.
The receiving portion is characterized in that a dish-shaped body having a curved upper surface is embedded in the foundation.
Seismic isolation structure of the building. 請求項２に記載の建築物の免震構造において、
前記受け部は、基礎の上面を凹陥して構成することを特徴とする、
建築物の免震構造。 In the seismic isolation structure of the building according to claim 2.
The receiving portion is characterized in that the upper surface of the foundation is recessed.
Seismic isolation structure of the building. 請求項１に記載の建築物の免震構造において、
免震部は、すべり支承であることを特徴とする、
建築物の免震構造。 In the seismic isolation structure of the building according to claim 1,
The seismic isolation section is characterized by being a sliding bearing.
Seismic isolation structure of the building. 請求項１乃至６のいずれか一項に記載の建築物の免震構造において、
一部の柱の下端と基礎との間に設ける免震部に代えて、摩擦材からなる減衰部材を設けることを特徴とする、
建築物の免震構造。 In the seismic isolation structure of the building according to any one of claims 1 to 6.
It is characterized in that a damping member made of a friction material is provided in place of the seismic isolation portion provided between the lower end of some columns and the foundation.
Seismic isolation structure of the building.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09256667A (en) * 1996-03-22 1997-09-30 Asahi Chem Ind Co Ltd Foundation structure of middle and low storied steel ridge-frame building
JP2000054685A (en) * 1998-08-11 2000-02-22 Koichi Ebara Base isolation foundation
JP2002070358A (en) * 2000-08-24 2002-03-08 Shimizu Corp Base isolation device
JP2003082880A (en) * 2001-09-14 2003-03-19 Shusuke Ito Base isolation device in general house
JP2010156166A (en) * 2008-12-29 2010-07-15 Yoshio Suzuki Base isolating apparatus for wooden building structure
JP2010189999A (en) * 2009-02-20 2010-09-02 Tokyo Institute Of Technology Base-isolation structure and building having the same
JP2015218472A (en) * 2014-05-16 2015-12-07 鹿島建設株式会社 Quake-absorbing structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09256667A (en) * 1996-03-22 1997-09-30 Asahi Chem Ind Co Ltd Foundation structure of middle and low storied steel ridge-frame building
JP2000054685A (en) * 1998-08-11 2000-02-22 Koichi Ebara Base isolation foundation
JP2002070358A (en) * 2000-08-24 2002-03-08 Shimizu Corp Base isolation device
JP2003082880A (en) * 2001-09-14 2003-03-19 Shusuke Ito Base isolation device in general house
JP2010156166A (en) * 2008-12-29 2010-07-15 Yoshio Suzuki Base isolating apparatus for wooden building structure
JP2010189999A (en) * 2009-02-20 2010-09-02 Tokyo Institute Of Technology Base-isolation structure and building having the same
JP2015218472A (en) * 2014-05-16 2015-12-07 鹿島建設株式会社 Quake-absorbing structure

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