JP4073407B2 - Seismic isolation devices for building structures - Google Patents
Seismic isolation devices for building structures Download PDFInfo
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- JP4073407B2 JP4073407B2 JP2004048857A JP2004048857A JP4073407B2 JP 4073407 B2 JP4073407 B2 JP 4073407B2 JP 2004048857 A JP2004048857 A JP 2004048857A JP 2004048857 A JP2004048857 A JP 2004048857A JP 4073407 B2 JP4073407 B2 JP 4073407B2
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- seismic isolation
- isolation device
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Description
本発明は建築構造物、とりわけ木造建築構造物において基礎と土台との間に施工して好適な免震装置に関するものである。
The present invention relates to a seismic isolation device suitable for construction between a foundation and a foundation in a building structure, particularly a wooden building structure.
建築物に対する免震構造には、従来から種々の構造が提案されているが、木造家屋の如き比較的軽量な建築物では独立した基礎の各々に免震構造体を組み込むか、基礎を一定に連続する布基礎としてその上面と土台の上面との間に免震構造体を組み込むことなどが行われていた、
Various structures have been proposed for seismic isolation structures for buildings, but in relatively lightweight buildings such as wooden houses, the base isolation structure is built into each independent foundation or the foundation is fixed. As a continuous fabric foundation, a seismic isolation structure was incorporated between the upper surface and the upper surface of the foundation.
しかし、近時、住宅等の比較的軽量な建築物に対する免震装置としては、球体を利用した免震装置が最善であると云われ、復元機能をもたせるために皿型の凹面を有する基板の上にベアリングボールを載置するもの(例えば特許文献1参照)や、振幅が大き過ぎるときにベアリングボールが基板の外に逸脱するのを防止するために環状壁を設けたもの(例えば特許文献2参照)などが提案されている。
また、複数の球体を上下金属位置の間に横方向に並置して配した免震素子(例えば特許文献3参照)や、球体とスプリングを併用したもの(例えば特許文献4参照)も提案されている。
However, recently, it is said that a seismic isolation device using a sphere is the best as a seismic isolation device for a relatively light building such as a house, and a substrate having a dish-shaped concave surface to provide a restoration function. A bearing ball placed thereon (see, for example, Patent Document 1) or an annular wall provided to prevent the bearing ball from deviating from the substrate when the amplitude is too large (for example, Patent Document 2). Have been proposed).
In addition, seismic isolation devices (see, for example, Patent Document 3) in which a plurality of spheres are juxtaposed in the horizontal direction between upper and lower metal positions, and those using a sphere and a spring in combination (for example, see Patent Document 4) have been proposed. Yes.
ところが、上記提案された球状体利用の免震装置は一般に水平方向の揺れに対するものが多く、上下方向の揺れを吸収するには充分でなく、また、吸収するにしても球体が1個、利用されているのみでは地震の衝撃震動を十分に吸収することができない問題があった。
特に木造建築物の場合には水平方向のみならず直下型地震に対応し上下方向に対しても十分な免震効果が求められる。
However, the proposed seismic isolation device using a spherical body is generally used for horizontal shaking, and is not sufficient to absorb vertical shaking. There was a problem that the shock shock of the earthquake could not be absorbed enough.
Especially in the case of wooden buildings, sufficient seismic isolation effect is required not only in the horizontal direction but also in the vertical direction in response to direct earthquakes.
本発明は上述の如き実状に対処し、特に複数の球体の上下配列と、スプリング及び補強ゴム体の併用を図ることにより、水平方向ならびら上下方向の震動を吸収し、横揺れのみとならず、直下型地震等による上下の揺れに対しても免震効果を付与し、建築物の地震等による崩壊,転倒の恐れを減少せしめることを目的とするものである。
The present invention addresses the actual situation as described above, and in particular, by using a vertical arrangement of a plurality of spheres together with a spring and a reinforcing rubber body, it absorbs horizontal and vertical vibrations and not only rolls. The purpose of this is to provide seismic isolation effects to vertical shaking caused by direct earthquakes, etc., and to reduce the risk of building collapses and falls.
そして、本発明は上記目的を達成するため、コンクリート基礎と建築物土台との間にH型鋼を介して設置される免震装置において、コンクリート基礎上に立設配置される補強弾性体からなる筒状体を基体として、その筒状体の上面側が鉄板を介して前記H型鋼に止着され、下面側が中心部に鉄板を配置してコンクリート基礎に一体に止着されると共に、上下椀状カップを底部により一連に連設し、上下に凹部を形成せしめた容器を前記筒状体内部に内壁面に沿って添接された弾性ばねを介し少なくとも上下2段積層して、その凹部内に所要大きさの球体を自由回動可能に収容せしめて構成した。 And in order to achieve the above-mentioned object, the present invention provides a seismic isolation device installed between a concrete foundation and a building foundation via an H-shaped steel, and a cylinder made of a reinforced elastic body standing on the concrete foundation. the Jo body as the substrate, the upper surface side of the cylindrical body is fastened to the H-shaped steel through the iron plate, the co when fastened together in a concrete foundation by placing the iron plate in the center portion lower side, top and bottom and continuously to set the bowl-shaped cup by a bottom and a top and bottom was allowed forming recesses in container stacking at least two upper and lower stages via an elastic spring that is along the inner wall surface bears against the tubular body portion, the recess A sphere of a required size is accommodated in the inside so as to be freely rotatable.
請求項2は筒状体内部に介装された弾性ばねの好ましい態様で、コイルスプリングを用いることを特徴とする。
A second aspect of the present invention is a preferred mode of the elastic spring interposed in the cylindrical body, and is characterized by using a coil spring.
上記本発明免震装置をコンクリートの基礎上に配設し、柱下部の建築物土台との間にH型鋼を介し設置し、上部をH型鋼に、下部をコンクリート基礎に夫々止着するときは椀状カップ凹部内に自由回動可能に収容された複数の球体の自由な回動による摩擦力により上下方向の震動は吸収され、一方、水平方向の震動に対しては球体及び球体と弾性体との間に介装されたコイルスプリング等の弾性ばねならびに筒状体の弾性体との相乗効果によって弾性体→弾性ばね→椀状カップ→球体を介して吸収されて建物の上下、ならびに水平方向の揺れを抑制することができる。
しかも、前記弾性ばねは水平方向及び上下方向の振動に対し、内部の椀状カップの凹部より球体が抜けるのを阻止し、椀状の凹部内に収容された球体の自由な回動による振動の吸収をより確実にする。
When the above-mentioned seismic isolation device of the present invention is installed on a concrete foundation, installed with an H-shaped steel between the building base at the bottom of the pillar, and the upper part is fixed to the H-shaped steel and the lower part is fixed to the concrete foundation. The vertical vibration is absorbed by the frictional force caused by the free rotation of a plurality of spheres accommodated in the bowl-shaped cup recess so as to freely rotate. On the other hand, the sphere, the sphere and the elastic body against the horizontal vibration. Is absorbed through the elastic body → elastic spring → bowl-shaped cup → sphere due to a synergistic effect with the elastic spring such as a coil spring and the elastic body of the cylindrical body interposed between Can be suppressed.
In addition, the elastic spring prevents the sphere from coming out of the recess of the inner bowl-shaped cup against the vibration in the horizontal direction and the vertical direction, and the vibration caused by the free rotation of the sphere accommodated in the bowl-like recess. Make absorption more certain.
以下、本発明の実施の形態を図1に示す木造建築の場合について説明する。
図において、1はコンクリート基礎であり、本発明は上記コンクリート基礎1と、上方の外壁2内部で木造床面F側端に立設される柱3下部の土台4との間にH型鋼5を介して免震装置を配置することによって構成される。
勿論、柱は隅柱,側柱,間仕切りなどがあり、本発明免震装置はこれら各柱の土台に随時、選択して適宜数、設置される。
Hereinafter, an embodiment of the present invention will be described in the case of a wooden building shown in FIG.
In the figure, reference numeral 1 denotes a concrete foundation. In the present invention, an H-
Of course, the pillar includes corner pillars, side pillars, partitions, and the like, and the seismic isolation device of the present invention is arbitrarily selected and installed on the base of each pillar as needed.
しかして、上記構成において、本発明の要部をなす免震装置は、図においてワイヤー等の補強材入りゴムの如き補強弾性体による筒状体6が基体として立設されており、該基体6上面側は鉄板を介して前記土台4下部のH型鋼5に、例えば図示例ではボルト7等によって4ケ所止着し、一方、下面側は鉄板9を中心部に配してボルト8で、図示例の場合、4ケ所止着することによって水平なコンクリート基礎1に固定されている。
In the above configuration, the seismic isolation device constituting the main part of the present invention has a
そして、上記筒状体6は、その内部に筒状体6の内壁面に沿ってコイルスプリング等よりなる弾性ばね10が沿接装入されており、該ばね10を介して内部に、上下椀状カップを底部により一連に連設し、上下に夫々、球体を保持する凹部を形成せしめたカップ容器11が少なくとも2段、図示例では3段積層挿入されていて、上下対向する凹部間に球体12を回動可能に収容、保持せしめて免震装置要部として構成されている。
ここで、球体12の数、カップ容器11の数は2段以上であれば効果的であり、1段のみでは余程、大きな球体が必要となり、好ましくない。
また、球体12は、椀状カップの凹部内で回動可能であることが肝要であり、回動がなければ椀状カップの凹部内面との間の摩擦力が発生せず、震動の抑制効果を得られないし、椀状カップがなければ球体同志による摩擦力が生じ、球体の摩耗を来す。
従って、本発明における免震装置としては筒状の弾性体6,弾性ばね10,椀状カップ容器11,球体12の組み合わせが求められ、これによって弾性体→弾性ばね→椀状カップ→球体への震動伝播により震動吸収が図られる。
The
Here, it is effective if the number of the
In addition, it is important that the
Therefore, as the seismic isolation device in the present invention, a combination of a cylindrical
コンクリート基礎をベタ基礎として15〜20cm厚に作成し、該基礎の上に下面が上面より稍広く、30cm径で中心部に8.5cmの孔径をもつ約35cmのワイヤー入りゴム筒状体をボルトにより4ケ所止着した。
そして、上記筒状体内にコイルスプリングを添接させて、その内部に1対の椀状カップをその底面同志で接合して凹部を外方に向けて形成した椀状カップ容器を、その凹部に夫々、球体を保持せしめて、椀状カップ容器3個と、これに保持されて4個の球体を収容した。
かくして配設されたゴム筒状体の上面に鉄板を配して高さ15cmのH型鋼を載せ、ゴム筒状体の上面とボルトにより4ケ所止着した。
この時、筒状体上面から底面までは略35cmであった。また、筒状体上面から床面までも略35cmであった。
かくて上記免震装置が形成されると、H型鋼上部に土台を配し側柱,隅柱,間仕切り等の柱を載置することにより本発明に係る木造家屋の免震装置が得られた。
A concrete foundation is made into a solid foundation with a thickness of 15 to 20 cm, and a rubber cylinder with a wire of about 35 cm having a lower surface wider than the upper surface, a diameter of 30 cm and a hole diameter of 8.5 cm in the center is bolted on the foundation. 4 places.
Then, a coil spring is attached to the cylindrical body, and a pair of bowl-shaped cups are joined to each other by the bottoms thereof, and a bowl-shaped cup container is formed with the depression facing outward. Each of the spheres was held, and three bowl-shaped cup containers and four spheres held therein were accommodated.
An iron plate was placed on the upper surface of the rubber cylinder thus disposed, and an H-shaped steel having a height of 15 cm was placed thereon, and was fixed at four locations with the upper surface of the rubber cylinder and bolts.
At this time, the distance from the top surface to the bottom surface of the cylindrical body was approximately 35 cm. Moreover, it was about 35 cm from the cylindrical body upper surface to the floor surface.
Thus, when the above seismic isolation device was formed, the base isolation was placed on the top of the H-shaped steel, and the pillars such as side columns, corner columns, and partitions were placed to obtain the seismic isolation device for the wooden house according to the present invention. .
本発明免震装置は特に木造家屋の免震装置として頗る効果的であるが、木造家屋に限らず、他の建築物においても使用し、同様に効果を奏することができる。
The seismic isolation device of the present invention is particularly effective as a seismic isolation device for a wooden house. However, the seismic isolation device can be used not only in a wooden house but also in other buildings and can achieve the same effect.
1;コンクリート基礎
3;柱
4;土台
5;H型鋼
6;補強弾性体
9;鉄板
10;弾性ばね
11;椀状カップ容器
12;球体
1: Concrete foundation
3; pillar
4; foundation
5; H-shaped steel
6; Reinforcing elastic body
9; Iron plate
10; Elastic spring
11; bowl-shaped cup container
12: Sphere
Claims (2)
コンクリート基礎上に立設配置される補強弾性体からなる筒状体よりなり、該筒状体は上面側が鉄板を介して前記H型鋼に止着され、下面側が中心部に鉄板を配置してコンクリート基礎に一体に止着されると共に、上下椀状カップを底部により一連に連設し、上下に凹部を形成せしめた容器を前記筒状体内部に内壁面に沿って添接された弾性ばねを介し少なくとも上下2段積層して、該凹部内に所要大きさの球体を夫々自由回動可能に収容せしめてなることを特徴とする建築構造物の免震装置。 A seismic isolation device installed via a H-shaped steel between a concrete foundation and a building foundation,
It consists of a cylindrical body composed of a reinforced elastic body standing on a concrete foundation, and the cylindrical body is fixed to the H-shaped steel on the upper surface side through an iron plate, and an iron plate is disposed in the center on the lower surface side of the concrete. co Once secured integrally to the base, and continuously provided on the lower bowl-shaped cup series by a bottom, which is spliced along the inner wall surface of the vessel was allowed recesses vertically to said tubular body portion A seismic isolation device for a building structure, wherein at least two upper and lower layers are stacked via an elastic spring, and a spherical body of a required size is accommodated in the recess so as to be freely rotatable.
筒状体内部に介装された弾性ばねがコイルスプリングである請求項1記載の建築構造物の免震装置。
The seismic isolation device for a building structure according to claim 1, wherein the elastic spring interposed in the cylindrical body is a coil spring.
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JP2004048857A JP4073407B2 (en) | 2004-02-25 | 2004-02-25 | Seismic isolation devices for building structures |
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JP2004048857A JP4073407B2 (en) | 2004-02-25 | 2004-02-25 | Seismic isolation devices for building structures |
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JP4073407B2 true JP4073407B2 (en) | 2008-04-09 |
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JPH0996125A (en) * | 1995-10-02 | 1997-04-08 | Noboru Kase | Round shaft aseismatic house |
JP3278806B2 (en) * | 1999-05-07 | 2002-04-30 | 小泉 恵三郎 | Seismic isolation device |
JP2002147058A (en) * | 2000-11-14 | 2002-05-22 | Hideo Nakajima | Base isolation structure for building |
JP3729450B2 (en) * | 2002-07-09 | 2005-12-21 | 尾瀬観光開発株式会社 | Seismic isolation device |
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