JP3253252B2 - Seismic isolation base structure - Google Patents
Seismic isolation base structureInfo
- Publication number
- JP3253252B2 JP3253252B2 JP00542897A JP542897A JP3253252B2 JP 3253252 B2 JP3253252 B2 JP 3253252B2 JP 00542897 A JP00542897 A JP 00542897A JP 542897 A JP542897 A JP 542897A JP 3253252 B2 JP3253252 B2 JP 3253252B2
- Authority
- JP
- Japan
- Prior art keywords
- seismic isolation
- foundation beam
- pit
- rolling
- foundation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は免震基礎構造物、さ
らに詳しくは地震等による鉛直及び水平方向に生じた震
動を良好に吸収して、上部構造物に震動の伝達を阻止で
きる免震基礎構造物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base-isolated base structure, and more particularly, to a base-isolated base capable of effectively absorbing vertical and horizontal vibrations caused by an earthquake or the like and preventing transmission of the vibrations to an upper structure. Related to structures.
【0002】[0002]
【従来の技術】従来の免震構造物としては、例えば特開
平8-240033号公報所載の発明が存在する。2. Description of the Related Art As a conventional seismic isolation structure, for example, there is an invention described in Japanese Patent Application Laid-Open No. H8-240033.
【0003】即ち、この従来のものは、図4に示すよう
に基礎梁6'の下面所定位置に免震材2'及び転動部材7'を
取付けたものであり、これら両部材2',7' により鉛直及
び水平方向の震動を吸収して、基礎梁6'上に構築される
上部構造物B'への震動の伝達を阻止せんとするものであ
る。That is, in this prior art, as shown in FIG. 4, a seismic isolation member 2 'and a rolling member 7' are mounted at predetermined positions on the lower surface of a foundation beam 6 '. 7 'absorbs the vertical and horizontal vibrations and prevents the transmission of the vibrations to the upper structure B' built on the foundation beam 6 '.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来の免震基礎構造物に於いては、上部構造物6'の鉛直荷
重を転動部材7'のみで支持するものであるために、地震
等による水平方向の震動が大きな場合にはさほど問題は
生じないのであるが、かかる震動が比較的小さな場合に
転動部材7'のスムースな転動が阻害されてこれを吸収す
ることができず、上部構造物B'に震動が伝達されてしま
うという大なる問題点を有していた。However, in the above-described conventional seismic isolation base structure, since the vertical load of the upper structure 6 'is supported only by the rolling members 7', an earthquake or the like is required. When the horizontal vibration due to is large, there is not much problem, but when such vibration is relatively small, the smooth rolling of the rolling member 7 ′ is disturbed and it cannot be absorbed, There was a serious problem that the vibration was transmitted to the upper structure B '.
【0005】また、基礎梁6'上に配置した免震材2'及び
転動部材7'により基礎梁6'を直接支持する構造であり、
作業スペースを有しないため、施工後に免震材2'等の保
守,点検等のメンテナンスが行えないという管理上の欠
点もあった。[0005] The base beam 6 'is directly supported by the seismic isolation members 2' and the rolling members 7 'arranged on the base beam 6'.
Since there is no work space, there was also a management defect that maintenance such as maintenance and inspection of the seismic isolation material 2 'etc. could not be performed after construction.
【0006】それ故に、本発明は上記従来の問題点を解
決するためになされたものであり、上部構造物への震動
の伝達を確実に阻止できるようにし、また作業スペース
を確保することにより、保守,点検等メンテナンスの便
に供することを課題とする。[0006] Therefore, the present invention has been made to solve the above-mentioned conventional problems, and it is possible to surely prevent the transmission of vibrations to the upper structure, and to secure a work space. The task is to provide maintenance and inspection services.
【0007】[0007]
【課題を解決するための手段】即ち、上記課題を解決す
るために本発明が採った手段は、上部開口状のピットP
内に複数本の支柱3が免震材2を介して立設されると共
に、該支柱3から側方に突設した基礎梁6が転動部材7
により移動自在に支持されてなり、しかも該基礎梁6上
に構築される上部構造物Bの鉛直荷重が前記免震材2に
より支持されるように構成されてなる点にある。In order to solve the above-mentioned problems, means adopted by the present invention is a pit P having an upper opening shape.
A plurality of columns 3 are erected through the seismic isolation member 2 and a foundation beam 6 projecting laterally from the columns 3 is provided with a rolling member 7.
And the vertical structure of the upper structure B constructed on the foundation beam 6 is supported by the seismic isolation member 2.
【0008】従って、免震基礎構造物上に構築される上
部構造物Bの鉛直荷重は支柱3を介して免震材2により
支持されることとなるため、かかる鉛直荷重により転動
部材7の転動動作が阻害されるというようなことはな
く、スムースな転動動作が良好に維持される。Accordingly, the vertical load of the upper structure B constructed on the base isolation structure is supported by the seismic isolation member 2 through the column 3, and the rolling member 7 is supported by the vertical load. The rolling operation is not hindered, and the smooth rolling operation is favorably maintained.
【0009】そして、地震等による鉛直方向の震動は、
免震材2が備える復元力と減衰効果により、また、水平
方向の震動は、その大小に拘らず基礎梁6の転動部材7
が例えば基礎1の上面を水平方向に転動することによ
り、それぞれ前記上部構造物Bには伝達されないのであ
る。[0009] The vertical vibration caused by an earthquake or the like is as follows .
The restoring force and the damping effect of MenShinzai 2 comprises, also, vibration in the horizontal direction, the rolling member 7 regardless foundation beam 6 on the magnitude
For example, by rolling the upper surface of the foundation 1 in the horizontal direction.
Therefore, they are not transmitted to the upper structure B.
【0010】[0010]
【発明の実施の形態】以下、本発明に係る免震基礎構造
物の一実施形態について図面に従って説明する。BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of a seismic isolation base structure according to the present invention will be described below with reference to the drawings.
【0011】図1乃至図3に於いて、Pは地中に埋設し
た上面開口箱型形状のピットを示し、鉄筋コンクリート
等で形成されている。1はピットPが中央に配されるよ
うにその周囲に所定間隔を有して地面Gに布設した基礎
である。In FIGS. 1 to 3, P denotes a box-shaped pit having an open top and buried in the ground, and is made of reinforced concrete or the like. Reference numeral 1 denotes a foundation laid on the ground G at predetermined intervals around the pit P so that the pit P is arranged at the center.
【0012】2はピットPの上底面に固定した4個の免
震材で、正方形の頂点に相当する4点に配されてなり、
ネオプレインゴム等からなる弾性体の両端に鉄板等が接
着されて復元力と減衰効果を備えている。Reference numeral 2 denotes four seismic isolation members fixed to the upper bottom surface of the pit P, which are arranged at four points corresponding to the vertices of a square.
An iron plate or the like is adhered to both ends of an elastic body made of neoprene rubber or the like to provide a restoring force and a damping effect.
【0013】3は各免震材2の上部に下端部を固定して
立設した支柱で、隣合う支柱3の上端部内側面及び下部
側内側面には夫々横架材4,5が架設されている。Numerals 3 denote standing columns which are fixed to the upper part of each of the seismic isolation members 2 with the lower end fixed thereto. ing.
【0014】6はI形鋼からなる基礎梁で、各支柱3の
上端部二外側面に夫々一端部を固定した内側基礎梁6a
と、該内側基礎梁6aの他端部端面に架設した外側基礎梁
6bとからなる。Reference numeral 6 denotes a foundation beam made of an I-shaped steel, and an inner foundation beam 6a having one end fixed to the upper end and two outer surfaces of each column 3 respectively.
And an outer foundation beam erected on the other end face of the inner foundation beam 6a
6b.
【0015】7は内側基礎梁6aの延長線上に位置する外
側基礎梁6bの下面に取付けた回転自在なローラからなる
転動部材で、該転動部材7は水平方向に回動自在に構成
されると共に、前記基礎1の上面に固着した溝形鋼8の
凹部8aに転動可能な状態で支持されている。Reference numeral 7 denotes a rolling member composed of rotatable rollers mounted on the lower surface of the outer foundation beam 6b located on an extension of the inner foundation beam 6a. The rolling member 7 is configured to be rotatable in the horizontal direction. In addition, it is rollably supported by a recess 8a of a channel 8 fixed to the upper surface of the foundation 1.
【0016】9は長尺側の内側基礎梁6a同士、該内側基
礎梁6aと外側基礎梁6aとの間に架設したI形鋼からなる
補助梁を示す。10は横架材4,基礎梁6及び補助梁9と
により形成される矩形状の空間に対角線上に架設した張
架材で、ターンバックル11を備えたワイヤ12からなる。Numeral 9 denotes an auxiliary beam made of I-shaped steel erected between the inner side foundation beams 6a on the long side and between the inner side foundation beam 6a and the outer side foundation beam 6a. Reference numeral 10 denotes a tension member that is diagonally installed in a rectangular space formed by the horizontal member 4, the foundation beam 6, and the auxiliary beam 9, and includes a wire 12 having a turnbuckle 11.
【0017】本実施形態は以上のような特定事項からな
り、かかる基礎構造物A上に上部構造物Bが構築される
が、その鉛直荷重の大部分は免震材2により支持され、
転動部材7にかかる鉛直荷重は小荷重となるように設定
されている。In this embodiment, the upper structure B is constructed on the substructure A, and most of the vertical load is supported by the seismic isolation member 2,
The vertical load applied to the rolling member 7 is set to be a small load.
【0018】そして、地震等の震動が発生した場合に
は、鉛直方向の震動は、免震材2が備える復元力と減衰
効果により、また、水平方向の震動は、その大小に拘ら
ず基礎梁6の転動部材7が例えば基礎1の上面を水平方
向に転動することにより、それぞれ前記上部構造物Bに
は伝達されないのである。 When a vibration such as an earthquake occurs, the vertical vibration is reduced by the restoring force and damping of the seismic isolation material 2.
Due to the effect, horizontal vibrations are
The rolling member 7 of the foundation beam 6 is, for example,
The upper structure B by rolling in
Is not transmitted.
【0019】この場合に於いて、上部構造物Bの鉛直荷
重の大部分は免震材2により支持されてなるため、転動
部材7の転動動作が上部構造物Bの鉛直荷重により阻害
されるというようなことはなく、震動の大小に拘らずス
ムースな転動動作が維持されて、上部構造物Bへの震動
の伝達は確実に阻止されるのである。In this case, most of the vertical load of the upper structure B is supported by the seismic isolation member 2, so that the rolling operation of the rolling member 7 is hindered by the vertical load of the upper structure B. The smooth rolling motion is maintained regardless of the magnitude of the vibration, and the transmission of the vibration to the upper structure B is reliably prevented.
【0020】尚、支柱3の本数は上記実施形態のように
4本とするのが一般的ではあるが、本発明は決してこれ
に限定されず、上部構造物Bの形状等に応じて複数の支
柱3と基礎梁6とを適宜組合せて基礎構造物を形成すれ
ばよい。Although the number of columns 3 is generally four as in the above-described embodiment, the present invention is not limited to this, and a plurality of columns 3 may be provided depending on the shape of the upper structure B and the like. What is necessary is just to form the foundation structure by combining the support | pillar 3 and the foundation beam 6 suitably.
【0021】また、図1の二点鎖線に示すように、上部
構造物Bの床面13にピットPと連通する出入口14を開設
すると、該出入口14を介して人がピットP内に出入りす
ることが可能となり、よって免震基礎構造物の保守,点
検等のメンテナンスの便に供し得るという好ましい効果
を奏することになる。As shown by a two-dot chain line in FIG. 1, when an entrance 14 communicating with the pit P is opened on the floor 13 of the upper structure B, a person enters and exits the pit P via the entrance 14. Therefore, it is possible to provide a favorable effect that the system can be used for maintenance such as maintenance and inspection of the base isolation structure.
【0022】さらに、転動部材7としては上記実施形態
の如きローラに限定されるものではなく、ボールのよう
なものを使用しても構わない。Further, the rolling member 7 is not limited to the roller as in the above embodiment, but may use a ball or the like.
【0023】また、上部構造物Bは鉄骨構造物、木造構
造物の別を問わず適用可能である。The upper structure B is applicable regardless of whether it is a steel structure or a wooden structure.
【0024】その他、ピットPの形状や基礎1の布設形
状等も本発明の意図する範囲内に於いて任意に設計変更
自在である。In addition, the shape of the pits P and the laying shape of the foundation 1 can be freely changed within the range intended by the present invention.
【0025】[0025]
【発明の効果】叙上のように、本発明は基礎梁上に構築
される上部構造物の鉛直荷重を免震材により支持するよ
うに構成してなるため、鉛直荷重により転動部材の転動
動作が従来のもののように阻害されるということはな
く、よって震動の大小に拘らずスムースな転動動作が維
持される結果、上部構造物への震動の伝達を良好に阻止
し得るという格別の効果を得るに至った。As described above, the present invention is configured so that the vertical load of the superstructure constructed on the foundation beam is supported by the seismic isolation material, so that the rolling member is rolled by the vertical load. The dynamic motion is not disturbed as in the conventional one, and therefore, the smooth rolling motion is maintained regardless of the magnitude of the vibration, and as a result, the transmission of the vibration to the upper structure can be prevented well. The effect was obtained.
【0026】また、請求項2のようにピット内への人の
出入りを可能とすることにより、免震基礎構造物の保
守,点検等のメンテナンスの便に供し得るという特有の
効果を奏することになる。In addition, by allowing a person to enter and exit the pit as described in claim 2, a unique effect is provided in that it can be used for maintenance such as maintenance and inspection of the seismic isolation base structure. Become.
【図1】本発明の一実施形態に係る一部断面正面図。FIG. 1 is a partial cross-sectional front view according to an embodiment of the present invention.
【図2】同ピット及び基礎部分の平面図。FIG. 2 is a plan view of the pit and a basic portion.
【図3】同基礎梁を配設した状態を示す平面図。FIG. 3 is a plan view showing a state in which the foundation beams are provided.
【図4】従来例を示す一部断面正面図。FIG. 4 is a partial cross-sectional front view showing a conventional example.
2…免震材 3…支柱 6…基礎梁 7…転動部材 13…床面 14…出入口 P…ピット 2 ... seismic isolation material 3 ... prop 6 ... foundation beam 7 ... rolling member 13 ... floor surface 14 ... entrance P ... pit
Claims (2)
柱(3) が免震材(2) を介して立設されると共に、該支柱
(3) から側方に突設した基礎梁(6) が転動部材(7) によ
り移動自在に支持されてなり、しかも該基礎梁(6) 上に
構築される上部構造物(B) の鉛直荷重が前記免震材(2)
により支持されるように構成されてなることを特徴とす
る免震基礎構造物。1. A plurality of columns (3) are erected through a seismic isolation material (2) in an upper open pit (P).
A foundation beam (6) protruding laterally from (3) is movably supported by a rolling member (7), and furthermore, a superstructure (B) constructed on the foundation beam (6). Vertical load is the seismic isolation material (2)
A base-isolated base structure characterized by being configured to be supported by:
人の出入りを可能とすべくその床面(13)に出入口(14)が
開設されてなる請求項1記載の免震基礎構造物。2. The seismic isolation device according to claim 1, wherein an entrance (14) is opened in the floor (13) of the pit (P) so that people can enter and exit from the superstructure (B). Substructure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00542897A JP3253252B2 (en) | 1997-01-16 | 1997-01-16 | Seismic isolation base structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00542897A JP3253252B2 (en) | 1997-01-16 | 1997-01-16 | Seismic isolation base structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10196154A JPH10196154A (en) | 1998-07-28 |
JP3253252B2 true JP3253252B2 (en) | 2002-02-04 |
Family
ID=11610919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP00542897A Expired - Fee Related JP3253252B2 (en) | 1997-01-16 | 1997-01-16 | Seismic isolation base structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3253252B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002038759A (en) * | 2000-07-26 | 2002-02-06 | Sekisui House Ltd | Structure of external floor in seismically isolated residence |
-
1997
- 1997-01-16 JP JP00542897A patent/JP3253252B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH10196154A (en) | 1998-07-28 |
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