JPH09177367A - Base insulation structure - Google Patents
Base insulation structureInfo
- Publication number
- JPH09177367A JPH09177367A JP34131495A JP34131495A JPH09177367A JP H09177367 A JPH09177367 A JP H09177367A JP 34131495 A JP34131495 A JP 34131495A JP 34131495 A JP34131495 A JP 34131495A JP H09177367 A JPH09177367 A JP H09177367A
- Authority
- JP
- Japan
- Prior art keywords
- seismic isolation
- hard
- isolation structure
- plates
- laminated body
- 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.)
- Pending
Links
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は免震装置に係り、大
型のビルのみならず、特に風揺れ等の影響を受けやすい
戸建住宅等の軽負荷用としても好適に使用しうる免震装
置に用いられる免震構造体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device, which can be suitably used not only for a large building but also for a light load of a detached house which is particularly susceptible to wind sway or the like. It relates to the seismic isolation structure used for.
【０００２】[0002]
【従来の技術】従来、複数個の鋼板等の剛性を有した硬
質板と、粘弾性的性質を有したゴム等の軟質板とを交互
に積層した免震構造体が、中層、低層のビルや橋梁等の
免震装置のゴム支承片として広く用いられている。この
ような免震構造体の軟質板を構成するゴム等の弾性体
は、下記のようなばね特性を有するように設計されるの
が一般である。即ち、ゴム等の弾性体の横ばね定数ＫH
、搭載質量をＭとして、水平方向の固有振動数ｆH は
次の条件を満たすように設計する。2. Description of the Related Art Conventionally, seismic isolation structures in which a plurality of rigid hard plates such as steel plates and soft plates such as rubber having viscoelastic properties are alternately laminated are used for middle and low-rise buildings. It is widely used as a rubber support piece for seismic isolation devices such as bridges and bridges. An elastic body such as rubber constituting a soft plate of such a seismic isolation structure is generally designed to have the following spring characteristics. That is, the lateral spring constant KH of an elastic body such as rubber
, And the mounted mass is M, the horizontal natural frequency fH is designed to satisfy the following conditions.
【０００３】[0003]
【数１】 [Equation 1]
【０００４】この固有振動数ｆH は、建物や橋梁などの
重量と、ゴムなどの弾性体の横ばね定数ＫH との比で決
まるので、ビルや橋梁など搭載重量Ｍの大きいものの免
震装置の軟質板を構成する弾性体はばね剛性の大きい材
料、高弾性材料が用いられることが一般的である。ま
た、免震構造体の積層部分に鉛等の塑性物を併用したも
のが一般的に用いられていた。Since the natural frequency fH is determined by the ratio of the weight of a building or bridge to the lateral spring constant KH of an elastic body such as rubber, the seismic isolation device is flexible even if the building or bridge has a large loading weight M. As the elastic body forming the plate, a material having a high spring rigidity or a highly elastic material is generally used. In addition, a structure in which a plastic material such as lead is used together in the laminated portion of the base isolation structure is generally used.
【０００５】このような、例えば、鉛を併用した免震構
造体は、低歪みにおける高弾性及び高歪みにおける低弾
性と、高減衰性とを合わせ持つので、地震や風揺れなど
に効果を発揮することができる。しかしながら、剪断歪
み２００％にも及ぶ大きな地震の場合は、免震の効果は
発揮できるものの、高い剪断歪みや歪み応力により内部
に用いた鉛等の塑性物が大きく塑性変型したり、切断破
壊されてしまう虞があり、特に建造物に用いた場合には
免震構造体のみを交換することができないため、大きな
地震等の振動をうけた後においても継続使用しうる、よ
り高い耐久性を有する免震構造体が要望されていた。Such a seismic isolation structure using lead in combination, for example, has both high elasticity at low strain and low elasticity at high strain, and high damping properties, so it is effective for earthquakes and wind sway. can do. However, in the case of a large earthquake with a shear strain of up to 200%, the effect of seismic isolation can be exhibited, but due to the high shear strain and strain stress, the plastic material such as lead used inside is greatly plastically deformed or cut and fractured. Since it is not possible to replace only the seismic isolation structure when it is used in buildings, it has higher durability that can be used continuously even after it is subjected to vibration such as a large earthquake. A seismic isolation structure was requested.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、このような
従来の技術に鑑みてなされたものであり、免震装置をビ
ルや橋梁等の重量物のみならず、戸建住宅用等の軽量物
に適用した場合にも高性能で、且つ、塑性変型や切断破
壊のない耐久性に優れた免震構造体の提供を目的とする
ものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional techniques, and the seismic isolation device is not only used for heavy objects such as buildings and bridges but also lightweight for detached houses. An object of the present invention is to provide a seismic isolation structure that has high performance even when applied to an object and has excellent durability without plastic deformation or cutting fracture.
【０００７】[0007]
【課題を解決するための手段】本発明の免震構造体は、
上下の面板の間に剛性を有した硬質板と粘弾性的性質を
有した軟質板とを、それぞれ複数個、交互に積層した複
合積層体の中心部に、該複合積層体を貫通する柱状の中
空部を設けて、そこに硬質粒状物を充填することを特徴
とする。The seismic isolation structure of the present invention comprises:
A rigid hard plate and a soft plate having viscoelastic properties between the upper and lower face plates, each having a plurality of columns, each having a columnar shape penetrating the composite laminate at the center of the composite laminate. It is characterized in that a hollow portion is provided and hard particles are filled therein.
【０００８】また、本発明の免震構造体においては、こ
の複合積層体に中央に中空部を有する円柱状のものを用
いた場合、前記複合積層体の平面視による直径をＤ、中
空部の平面視による直径をｄとしたとき、Ｄとｄが、下
記式を満たす関係にあることを特徴とする。Further, in the seismic isolation structure of the present invention, when a cylindrical column having a hollow portion in the center is used for this composite laminate, the diameter of the composite laminate in plan view is D, It is characterized in that D and d have a relationship satisfying the following equation, where d is a diameter in a plan view.
【０００９】０．６≧ｄ／Ｄ≧０．１５ さらに、中空部に充填する前記硬質粒状物の平均粒径は
０．１ｍｍ〜３０ｍｍであり、且つ、硬質粒状物の硬度
が、モース硬度で２以上であることを特徴とする。0.6 ≧ d / D ≧ 0.15 Furthermore, the average particle diameter of the hard granules to be filled in the hollow portion is 0.1 mm to 30 mm, and the hardness of the hard granules is Mohs hardness. It is characterized by being 2 or more.
【００１０】[0010]
【発明の実施の形態】本発明の免震構造体の粘弾性的性
質を有した軟質板に用いられる材料とは、５０％モジュ
ラスが１．５〜１０ｋｇｆ／ｃｍ2 、２５℃における動
的剪断弾性率Ｇが、１．５〜１０ｋｇｆ／ｃｍ2 の特性
を有するものを指し、５０％モジュラスが２〜８ｋｇｆ
／ｃｍ2 、動的剪断弾性率Ｇが、２〜８ｋｇｆ／ｃｍ2
のものが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The material used for the soft plate having the viscoelasticity of the seismic isolation structure of the present invention is a material having a 50% modulus of 1.5 to 10 kgf / cm 2 and a dynamic shear at 25 ° C. An elastic modulus G indicates a property of 1.5 to 10 kgf / cm 2 , and a 50% modulus is 2 to 8 kgf.
/ Cm 2 , dynamic shear modulus G is 2 to 8 kgf / cm 2
Are preferred.
【００１１】各種材料の５０％モジュラス及び動的剪断
弾性率Ｇは、例えば、ＪＩＳ Ｋ６３０１、Ｋ６３９４
に準拠して測定することができる。The 50% modulus and the dynamic shear modulus G of various materials are, for example, JIS K6301, K6394.
It can be measured according to.
【００１２】ここで、粘弾性的性質を有する材料として
は、熱可塑ゴム、ウレタンゴム、各種の加硫ゴム、未加
硫ゴム、微架橋ゴム、プラスチックス等の有機材料、こ
れらの発泡体、アスファルト、粘土等の無機材料、これ
らの混合材料など各種の材料であって、上記粘弾性的性
質を有するものを用いることができる。Here, examples of the material having viscoelastic properties include organic materials such as thermoplastic rubber, urethane rubber, various vulcanized rubbers, unvulcanized rubbers, slightly crosslinked rubbers, and plastics, foams thereof, Various materials such as inorganic materials such as asphalt and clay, and mixed materials thereof having the above viscoelastic properties can be used.
【００１３】これらの材料は、平板状に成形され、軟質
板として用いられる。軟質板の形状は特に制限はない
が、本発明の免震構造体においては、柱状の中空部を有
することから、中央に中空部を有することが必要であ
る。通常は、中央に中空部を有する所謂円柱状のものが
使用され、個々の軟質板はドーナツ盤状の形状を有す
る。軟質板の厚みには特に制限はなく、使用される材料
及び所望の免震性能によって選択できるが、一般には、
重量物に用いる場合には、５〜１０ｍｍ、軽量物に用い
る場合には、１〜４ｍｍ程度の厚みのものが使用され
る。These materials are formed into a flat plate and used as a soft plate. The shape of the soft plate is not particularly limited, but since the seismic isolation structure of the present invention has a columnar hollow portion, it is necessary to have a hollow portion at the center. Usually, a so-called columnar one having a hollow portion in the center is used, and each soft plate has a donut disc shape. The thickness of the soft plate is not particularly limited and can be selected depending on the material used and the desired seismic isolation performance, but in general,
When it is used for heavy objects, it has a thickness of 5 to 10 mm, and when it is used for lightweight objects, it has a thickness of about 1 to 4 mm.
【００１４】これらの材料は単独で用いても、複数種を
混合して用いてもよく、全体が均一な材料で形成されて
いてもよいが、内側部分に高ダンピング材料、外側部分
にクリープ性能の良くかつ柔らかい材料等と二種類以上
を組み合わせて使用してもよい。These materials may be used singly or as a mixture of two or more kinds, and may be formed of a uniform material as a whole, but a high damping material is used for the inner part and a creep performance is used for the outer part. You may use it in combination of 2 or more types with a good and soft material.
【００１５】また、本発明の免震構造体における硬質板
としては、金属、セラミックス、プラスチックス、ＦＲ
Ｐ、ポリウレタン、木材、紙板、スレート板、化粧板等
所要の剛性を有する各種の材料を使用することができ
る。ここで、所要の剛性とは、設計条件により大きく変
わるが、剪断変型した特許、座屈現象が生じにくい剛性
を意味する。Further, as the hard plate in the seismic isolation structure of the present invention, metal, ceramics, plastics, FR
Various materials having required rigidity, such as P, polyurethane, wood, paper board, slate board, decorative board, etc., can be used. Here, the required rigidity means a rigidity of a patent with shear deformation or a buckling phenomenon, although it varies greatly depending on design conditions.
【００１６】硬質板の厚み、形状には特に制限はなく、
使用される材料及び所望の免震性能によって選択できる
が、その厚みは、一般には、重量物に用いる場合には、
２〜４ｍｍ、軽量物に用いる場合には、０．５〜２ｍｍ
程度の厚みのものが使用される。また、形状は、積層さ
れる軟質板と同様、中央に中空部を有することの他は任
意であるが、通常は、併用する軟質板と同じ形状のもの
を用いる。There is no particular limitation on the thickness and shape of the hard plate,
It can be selected depending on the material used and the desired seismic isolation performance, but its thickness is generally
2 to 4 mm, 0.5 to 2 mm when used for lightweight items
It is of a moderate thickness. The shape is arbitrary as well as the soft plate to be laminated, except that it has a hollow portion at the center, but usually the same shape as the soft plate used together is used.
【００１７】前記軟質板と硬質板とを交互に複数段積層
して複合積層体を構成するものである。軟質板及び硬質
板、それぞれの形状、面積及び厚さは前記した如く要求
される免震性能によって異なるが、通常は、複合積層体
は前記した如く、中空部を有する円柱状を示し、軟質板
及び硬質板両者の形状が同じドーナツ盤状をなし、且
つ、表面積も同じであるものが汎用されている。A plurality of layers of the soft plate and the hard plate are alternately laminated to form a composite laminate. The shape, area, and thickness of each of the soft plate and the hard plate differ depending on the seismic isolation performance required as described above, but normally, as described above, the composite laminate exhibits a columnar shape having a hollow portion, It is widely used that both the hard plate and the hard plate have the same donut shape and have the same surface area.
【００１８】これらの免震構造体においては、剛性を有
する硬質板と粘弾性的性質を有する軟質板としてドーナ
ツ盤状のものを用いることが一般的であり、その場合、
前記軟質板の平面視による直径をＤ、軟質板の中空部の
平面視による直径をｄとしたとき、Ｄとｄが、下記式を
満たす関係にあることが好ましい。In these seismic isolation structures, it is common to use a rigid hard plate and a doughnut-shaped soft plate having viscoelastic properties. In that case,
When the diameter of the soft plate in plan view is D and the diameter of the hollow portion of the soft plate in plan view is d, it is preferable that D and d satisfy the following formula.
【００１９】０．６≧ｄ／Ｄ≧０．１５ ｄ／Ｄが０．６を超えると周囲に存在する複合積層体の
バネ剛性と中空部に充填された粒状物同志の摩擦力との
バランスがくずれ、地震等で大変型を受けた後に、もと
の位置に戻らなくなる虞があり、ｄ／Ｄが０．１５未満
であると摩擦力の効果が小さく、所望の減衰効果が得ら
れないため、いずれも好ましくない。用いられる複合積
層体が中空部を有する円柱状でない場合においても、複
合積層体と中空部との面積比が前記の式より導かれる範
囲にあることが好ましい。0.6 ≧ d / D ≧ 0.15 When d / D exceeds 0.6, the balance between the spring rigidity of the composite laminate existing around and the frictional force of the granular materials filled in the hollow portion. There is a risk that it will not return to its original position after being severely deformed due to crushing, earthquakes, etc. If d / D is less than 0.15, the effect of frictional force is small and the desired damping effect cannot be obtained. Therefore, neither is preferable. Even when the composite laminate to be used is not cylindrical having a hollow portion, it is preferable that the area ratio between the composite laminate and the hollow portion is in a range derived from the above equation.
【００２０】具体的には、例えば、重量物に用いる場
合、前記Ｄが５００〜１５００ｍｍ、ｄが７５〜９００
ｍｍ、軽量物に用いる場合、前記Ｄが５０〜３００ｍ
ｍ、ｄが７．５〜１８０ｍｍ程度のものが好ましい。Specifically, for example, when used in a heavy object, D is 500 to 1500 mm and d is 75 to 900.
mm, when used for lightweight objects, the D is 50 to 300 m
It is preferable that m and d are about 7.5 to 180 mm.
【００２１】本発明の免震構造体に耐候性を付与するた
め、免震構造体の外側を耐候性の優れた材料で被覆して
も良い。この被覆材料としては、例えば、ブチルゴム、
アクリルゴム、ポリウレタン、シリコンゴム、フッ素ゴ
ム、多硫化ゴム、エチレンプロピレンゴム（ＥＲＰ及び
ＥＰＤＭ）、クロロスルホン化ポリエチレン、塩素化ポ
リエチレン、エチレン酢酸ビニルゴム、クロロプレンゴ
ムなどを用いることができる。これらの材料は単独で
も、二種類以上をブレンドしても良い。また、天然ゴ
ム、イソプレンゴムスチレンブタジエンゴム、ブタジエ
ンゴム、ニトリルゴム等とブレンドしても良い。In order to impart weather resistance to the seismic isolation structure of the present invention, the outside of the seismic isolation structure may be coated with a material having excellent weather resistance. As this coating material, for example, butyl rubber,
Acrylic rubber, polyurethane, silicone rubber, fluorine rubber, polysulfide rubber, ethylene propylene rubber (ERP and EPDM), chlorosulfonated polyethylene, chlorinated polyethylene, ethylene vinyl acetate rubber, chloroprene rubber, and the like can be used. These materials may be used alone or as a blend of two or more. Further, it may be blended with natural rubber, isoprene rubber, styrene-butadiene rubber, butadiene rubber, nitrile rubber and the like.
【００２２】本発明の免震構造体において柱状の中空部
に充填される硬質粒状物としては、圧縮充填することに
より、粒状物同志の摩擦力によって免震構造体の過剰な
変型を防止しうるものであれば、特に制限はないが、モ
ース硬度にて２以上の値を有する材料で形成されている
ものが好ましい。好適な材料としては、例えば、銅（モ
ース硬度：２）、鉄（モース硬度：４）、サンドブラス
ト用砂（モース硬度：９）、ガラス（モース硬度：
６）、石英（モース硬度：７）等が挙げられ、さらに、
前記好ましい硬度を有する繊維強化プラスチック、各種
セラミック等も使用することができる。In the seismic isolation structure of the present invention, the hard granular material to be filled in the columnar hollow portion can be compressed and filled to prevent excessive deformation of the seismic isolation structure due to the frictional force between the granular materials. The material is not particularly limited as long as it is a material, but a material formed of a material having a Mohs hardness of 2 or more is preferable. Examples of suitable materials include copper (Mohs hardness: 2), iron (Mohs hardness: 4), sand for sandblasting (Mohs hardness: 9), glass (Mohs hardness:
6), quartz (Mohs hardness: 7), and the like.
Fiber reinforced plastics having various preferable hardnesses, various ceramics, etc. can also be used.
【００２３】粒状物の大きさは、０．１〜３０ｍｍの範
囲のものが好ましく、０．１ｍｍ未満であると充填時に
十分な応力をかけることができず、３０ｍｍを超える
と、粒状物同志の接触面積が小さくなり、いずれも所望
の摩擦力を得難いため、好ましくない。The size of the granules is preferably in the range of 0.1 to 30 mm. If it is less than 0.1 mm, sufficient stress cannot be applied at the time of filling, and if it exceeds 30 mm, the size of the granules is the same. This is not preferable because the contact area becomes small and it is difficult to obtain a desired frictional force in either case.
【００２４】この硬質粒状物の具体例としては、ガラス
ビーズ、鉄球、銅球等の金属球、砂、石英粉、Ａｌ2 Ｏ
3 を主成分とするサンドブラスト用砂等が挙げられる。Specific examples of this hard granular material include glass beads, metal balls such as iron balls and copper balls, sand, quartz powder, and Al 2 O.
Sand blasting sand containing 3 as a main component.
【００２５】粒状物の形状については、前記のサイズを
有するものであれば特に制限はないく、球状、紡錘状、
不定型等のいずれであってもよく、粒状物の表面も平滑
であっても、微細な凹凸を有するものであってもよい
が、変型緩和効果及び摩擦力の観点から、平板状のもの
よりもアスペクト比が３以下程度の球に近い形状を有す
るものが好ましく用いられる。The shape of the granular material is not particularly limited as long as it has the above-mentioned size, and it is spherical, spindle-shaped,
It may be an irregular shape or the like, and the surface of the granular material may be smooth or may have fine irregularities, but from the viewpoint of the deformation mitigating effect and frictional force, it is more preferable than the flat shape. Also, those having a shape close to a sphere with an aspect ratio of about 3 or less are preferably used.
【００２６】これらの硬質粒状物を前記免震構造体の中
空部に充填する際には、タッピングを行うなどして、最
密充填し、さらに、蓋体等により応力が掛かるように封
入することが好ましい。中空部に最密充填された硬質粒
状物同志の摩擦力が減衰効果に寄与するため、硬質粒状
物が互いに自由に振動しうるような空間を有する充填状
態では所望の減衰効果が得られず好ましくない。When filling the hollow portion of the seismic isolation structure with these hard granular materials, it is necessary to perform the closest packing by tapping or the like, and further to enclose so that a stress is applied by a lid or the like. Is preferred. Since the frictional force between the hard particles closely packed in the hollow portion contributes to the damping effect, the desired damping effect cannot be obtained in the filled state having a space where the hard particles can freely vibrate with each other, which is preferable. Absent.
【００２７】本発明の免震構造体は、軟質板及び硬質板
のサイズ、積層枚数、中空部の体積、充填する粒状物の
特性を選択することにより、橋、ビル等の重量物から、
戸建住宅の如き、比較的軽量（軽負荷）物についても、
優れた免震性能を示す免震構造体を得ることができる。
ここで、軽負荷物とは、面圧５０ｋｇｆ／ｃｍ2 未満、
更には面圧３０ｋｇｆ／ｃｍ2 以下、更に好ましくは面
圧２０ｋｇｆ／ｃｍ2以下のものを指す。The seismic isolation structure of the present invention can be selected from heavy objects such as bridges and buildings by selecting the size of the soft and hard plates, the number of laminated sheets, the volume of the hollow part, and the characteristics of the granular material to be filled.
For relatively lightweight (light load) objects such as detached houses,
It is possible to obtain a seismic isolation structure having excellent seismic isolation performance.
Here, the light load means a surface pressure of less than 50 kgf / cm 2 ,
Furthermore, the surface pressure is 30 kgf / cm 2 or less, and more preferably the surface pressure is 20 kgf / cm 2 or less.
【００２８】本発明の構成は、免震構造体の上下の面板
の間に剛性を有した硬質板と粘弾性的性質を有した軟質
板とを、それぞれ複数個、交互に積層した複合積層体を
設け、該複合積層体の内部に、該複合積層体を貫通する
柱状の中空部を設けて、そこに硬質の粒状物を充填して
なるものである。The structure of the present invention is a composite laminate in which a plurality of rigid hard plates and soft plates having viscoelastic properties are alternately laminated between the upper and lower face plates of the seismic isolation structure. And a column-shaped hollow portion penetrating the composite laminate is provided inside the composite laminate, and a hard granular material is filled therein.
【００２９】地震時などには、この免震構造体に大変形
が加わるが、剪断変形に合わせて移動する中空部に最密
充填された硬質粒状物の粒子表面同志の摩擦によって、
振動が効果的に減衰され、積層構造体にいわゆる塑性変
型を引き起こす程のダメージが起こることがない。この
ため、一度の地震で免震効果が失われることなく、耐久
性のある免震効果を有する。During an earthquake or the like, a large deformation is applied to the seismic isolation structure, but due to the friction between the particle surfaces of the hard granules that are most closely packed in the hollow portion that moves according to the shear deformation,
The vibration is effectively damped, and the laminated structure is not damaged so much as to cause so-called plastic deformation. Therefore, the seismic isolation effect is not lost in one earthquake, and has a durable seismic isolation effect.
【００３０】[0030]
【実施例】以下に本発明を図面を参照して実施例につい
て具体的に説明する。表１に実施例と比較例の条件と試
験結果をまとめて示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. Table 1 collectively shows the conditions and test results of Examples and Comparative Examples.
【００３１】（実施例１）図１は本発明の実施例１に係
る免震構造体１０の断面図を示している。図１に示す免
震構造体１０において、上面板１２（鉄板）と下面板１
４（鉄板）の間に硬質板１６として外径１６０ｍｍ、内
径３０ｍｍ、厚さ１ｍｍの鋼板２０枚、軟質板１８とし
て、５０％モジュラスが１．９ｋｇｆ／ｃｍ2 、引張り
強度が７０ｋｇｆ／ｃｍ2 、破断時の伸びが７００％の
ゴム材料を用い、軟質板１８（１枚の厚さ１．６ｍｍ）
を２１層用いた。この免震構造体１０の積層体中央部に
設けた中空部２０に、直径１ｍｍのガラスビーズ（球
形）２２をタッピングを行いながら充填できる最大量を
充填し、その上部にＭ３０のネジを切ったフタ２４をト
ルク１ｋｇｍでねじ込むことにより中のガラスビーズ２
２が圧縮状態になるように充填、封入した。さらに、こ
の積層体の外周を天然ゴム系ゴム材料を用いた外被ゴム
２６で被覆して免震構造体を得て、実施例１とした。(Embodiment 1) FIG. 1 shows a sectional view of a seismic isolation structure 10 according to Embodiment 1 of the present invention. In the seismic isolation structure 10 shown in FIG. 1, a top plate 12 (iron plate) and a bottom plate 1
4 outside diameter as the rigid plate 16 between the (iron plate) 160 mm, an inner diameter of 30 mm, 20 sheets steel plate having a thickness of 1 mm, as the soft sheet 18, 50% modulus of 1.9kgf / cm 2, a tensile strength of 70 kgf / cm 2, A soft plate 18 (thickness 1.6 mm per sheet) made of a rubber material whose elongation at break is 700%
21 layers were used. The hollow portion 20 provided in the central portion of the laminated body of the seismic isolation structure 10 was filled with the maximum amount of glass beads (spherical) 22 having a diameter of 1 mm that could be filled while tapping, and the upper portion thereof was threaded with M30. Glass beads 2 inside by screwing the lid 24 with a torque of 1 kgm
It was filled and sealed so that 2 was in a compressed state. Further, the outer periphery of this laminated body was covered with the outer rubber 26 made of a natural rubber-based rubber material to obtain a seismic isolation structure, which was Example 1.
【００３２】この免震構造体に、荷重３ｔ、振動数ｆ＝
０．２Ｈｚで剪断歪１００％で震動を与えた時の剪断剛
性（Ｇ）、ｔａｎδを測定した。結果を下記表１に示し
た。A load of 3 t and a frequency f =
Shear rigidity (G) and tan δ when a vibration was applied at a shear strain of 100% at 0.2 Hz were measured. The results are shown in Table 1 below.
【００３３】また、この積層体の中空部２０にガラスビ
ーズ２２を充填しなかったこと以外は実施例１と同様に
して、免震構造体を作製して比較例１とした。この比較
例１の免震構造体について、実施例１と同様の評価を行
い、結果を下記表１に示した。A seismic isolation structure was produced in the same manner as in Example 1 except that the hollow portion 20 of this laminated body was not filled with the glass beads 22, and Comparative Example 1 was obtained. The seismic isolation structure of Comparative Example 1 was evaluated in the same manner as in Example 1, and the results are shown in Table 1 below.
【００３４】[0034]
【表１】 [Table 1]
【００３５】表１に明らかなごとく、本発明の免震構造
体である実施例１は中空部にガラスビーズを充填しなか
った比較例１の免震構造体に比べて、著しく減衰効果が
向上していた。As is apparent from Table 1, the damping effect of Example 1 which is the seismic isolation structure of the present invention is remarkably improved as compared with the seismic isolation structure of Comparative Example 1 in which the hollow portion is not filled with glass beads. Was.
【００３６】また、この結果をみるに、剪断剛性（Ｇ）
が２．５ｋｇｆ／ｃｍ2 、ｔａｎδが０．３７という数
値は、例えば、戸建用免震構造体として十分なレベルで
あることが確認された。Further, looking at this result, the shear rigidity (G)
It was confirmed that the numerical values of 2.5 kgf / cm 2 and tan δ of 0.37 are, for example, sufficient levels for a seismic isolation structure for detached houses.
【００３７】（実施例２）図２は本発明の実施例２に係
る免震構造体２８の断面図を示している。図２に示す免
震構造体２８において、上面板１２（鉄板）と下面板１
４（鉄板）の間に硬質板１６として外径１６０ｍｍ、内
径６０ｍｍ、厚さ１ｍｍの鋼板２０枚、軟質板１８とし
て、５０％モジュラスが６．０ｋｇｆ／ｃｍ2 、引張り
強度が２００ｋｇｆ／ｃｍ2 、破断時の伸びが６５０％
のゴム材料を用い、軟質板（１枚の厚さ１．６ｍｍ）を
２１層用いた。この免震構造体２８の積層体中央部に設
けた中空部２０に、直径１ｍｍのガラスビーズ（球形）
２２をタッピングを行いながら充填できる最大量を充填
し、その最上部に厚さ１．５ｍｍのナイロン板３０をク
ッション材として配置し、その上から上ブタ３２をボル
トで締めて固定することにより、中のガラスビーズ２２
が圧縮状態になるように充填、封入した。さらに、この
積層体の外周を天然ゴム系ゴム材料を用いた外被ゴム２
６で被覆して免震構造体を得て、実施例１とした。(Second Embodiment) FIG. 2 is a sectional view of a seismic isolation structure 28 according to a second embodiment of the present invention. In the seismic isolation structure 28 shown in FIG. 2, the upper plate 12 (iron plate) and the lower plate 1
Between 4 (iron plates), 20 hard steel plates 16 having an outer diameter of 160 mm, an inner diameter of 60 mm and a thickness of 1 mm, and a soft plate 18 having a 50% modulus of 6.0 kgf / cm 2 and a tensile strength of 200 kgf / cm 2 , 650% elongation at break
21 layers of soft plates (one sheet having a thickness of 1.6 mm) were used. Glass beads (spherical) having a diameter of 1 mm are provided in the hollow portion 20 provided at the center of the laminated body of the seismic isolation structure 28.
22 is filled while tapping the maximum amount that can be filled, a nylon plate 30 having a thickness of 1.5 mm is arranged as a cushioning material on the uppermost portion, and the upper lid 32 is fixed by bolting it from above. Glass beads 22 inside
Was filled and sealed so that the powder was in a compressed state. Further, the outer circumference of this laminated body is covered with a rubber 2 using a natural rubber type rubber material.
A seismic isolation structure was obtained by coating with No.6, and this was taken as Example 1.
【００３８】この免震構造体２８に、荷重１０ｔ、振動
数ｆ＝０．２Ｈｚで剪断歪１００％で震動を与えた時の
剪断剛性（Ｇ）、ｔａｎδを測定した。結果を下記表２
に示した。Shear rigidity (G) and tan δ when a vibration was applied to this seismic isolation structure 28 at a load of 10 t and a frequency f = 0.2 Hz and a shear strain of 100% were measured. The results are shown in Table 2 below.
It was shown to.
【００３９】また、この積層体の中空部にガラスビーズ
を充填しなかったこと以外は実施例２と同様にして、免
震構造体を作製して比較例１とした。この比較例２の免
震構造体について、実施例２と同様の評価を行い、結果
を下記表２に示した。A seismic isolation structure was prepared as Comparative Example 1 in the same manner as in Example 2 except that the hollow portion of this laminate was not filled with glass beads. The seismic isolation structure of Comparative Example 2 was evaluated in the same manner as in Example 2, and the results are shown in Table 2 below.
【００４０】[0040]
【表２】 [Table 2]
【００４１】表２に明らかなごとく、本発明の免震構造
体である実施例２は中空部にガラスビーズを充填しなか
った比較例２の免震構造体に比べて、著しく減衰効果が
向上していた。As is clear from Table 2, the damping effect of Example 2 which is the seismic isolation structure of the present invention is remarkably improved as compared with the seismic isolation structure of Comparative Example 2 in which the hollow portion is not filled with glass beads. Was.
【００４２】[0042]
【発明の効果】以上の説明から明らかなごとく、本発明
の免震構造体は、ビルや橋梁等の重量物のみならず、戸
建住宅用等の軽重量物に適用した場合にも高性能で、且
つ、塑性変型や切断破壊がなく、かつ、耐久性に優れた
免震構造体を得ることができた。As is apparent from the above description, the seismic isolation structure of the present invention has high performance when applied to not only heavy objects such as buildings and bridges but also light objects such as detached houses. In addition, it was possible to obtain a seismic isolation structure with excellent durability and without plastic deformation or cutting fracture.
【図１】 本発明の実施例１に係る免震構造体の断面図
である。FIG. 1 is a cross-sectional view of a seismic isolation structure according to a first embodiment of the present invention.
【図２】 本発明の実施例２に係る免震構造体の断面図
である。FIG. 2 is a sectional view of a seismic isolation structure according to a second embodiment of the present invention.
１０：免震構造体 １２：上面板（鉄板） １４：下面板（鉄板） １６：硬質板 １８：軟質板 ２０：柱状の中空部 ２２：ガラスビーズ（硬質の粒状物） ２４：フタ ２６：外被ゴム ２８：免震構造体 ３０：ナイロン板（クッション材） ３２：上ブタ 10: Seismic isolation structure 12: Top plate (iron plate) 14: Bottom plate (iron plate) 16: Hard plate 18: Soft plate 20: Columnar hollow part 22: Glass beads (hard granular material) 24: Lid 26: Outside Rubberized 28: Seismic isolation structure 30: Nylon plate (cushion material) 32: Upper pig
Claims (3)
と粘弾性的性質を有した軟質板とを、それぞれ複数個、
交互に積層した複合積層体を設け、該複合積層体の内部
に、該複合積層体を貫通する柱状の中空部を有する免震
構造体であって、 該柱状の中空部に硬質粒状物を充填したことを特徴とす
る免震構造体。1. A plurality of hard plates having rigidity and a plurality of soft plates having viscoelastic properties are provided between the upper and lower face plates, respectively.
A seismic isolation structure having a composite laminated body that is alternately laminated, and having a columnar hollow portion that penetrates the composite laminated body inside, wherein the columnar hollow portion is filled with hard particulate matter. A seismic isolation structure characterized by the above.
円柱状をなしており、複合積層体の平面視による直径を
Ｄ、中空部の平面視による直径をｄとしたとき、Ｄとｄ
とが、下記式を満たす関係にあることを特徴とする請求
項１記載の免震構造体。 ０．６≧ｄ／Ｄ≧０．１５2. The composite laminate has a columnar shape having a hollow portion in the center, where D is the diameter of the composite laminate in plan view and D is the diameter of the hollow portion in plan view.
2. The seismic isolation structure according to claim 1, wherein and satisfy the following formula. 0.6 ≧ d / D ≧ 0.15
〜３０ｍｍであり、且つ、硬質粒状物の硬度が、モース
硬度で２以上であることを特徴とする請求項１又は２に
記載の免震構造体。3. The average particle size of the hard granules is 0.1 mm.
The seismic isolation structure according to claim 1 or 2, wherein the seismic isolation structure has a hardness of -30 mm and a hardness of the hard granular material of 2 or more in Mohs' hardness.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34131495A JPH09177367A (en) | 1995-12-27 | 1995-12-27 | Base insulation structure |
| US08/722,567 US5765322A (en) | 1995-09-29 | 1996-09-27 | Seismic isolation apparatus |
| US09/021,845 US5884440A (en) | 1995-09-29 | 1998-02-11 | Seismic isolation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34131495A JPH09177367A (en) | 1995-12-27 | 1995-12-27 | Base insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09177367A true JPH09177367A (en) | 1997-07-08 |
Family
ID=18345103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34131495A Pending JPH09177367A (en) | 1995-09-29 | 1995-12-27 | Base insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09177367A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220691A (en) * | 1999-01-29 | 2000-08-08 | Oiles Ind Co Ltd | Vibration energy absorbing device |
| JP2010096243A (en) * | 2008-10-15 | 2010-04-30 | Polsys Kenkyusho:Kk | Base isolation structure and method for manufacturing the same |
| JP6064075B1 (en) * | 2016-08-23 | 2017-01-18 | 株式会社ビービーエム | Seismic isolation device for structure and manufacturing method of seismic isolation device for structure |
| CN106401255A (en) * | 2016-10-09 | 2017-02-15 | 中国建筑第八工程局有限公司 | Combined lead-particle rubber damper |
| CN106567592A (en) * | 2016-11-09 | 2017-04-19 | 中国建筑第八工程局有限公司 | Low-yield point steel energy dissipation and particle energy dissipation damper |
| CN107816125A (en) * | 2017-10-26 | 2018-03-20 | 叶长青 | The structure of basement and superstructure synchronous construction |
| CN109098289A (en) * | 2018-08-27 | 2018-12-28 | 苏州海德新材料科技股份有限公司 | Shock isolating pedestal core material, friction core shock isolating pedestal and its preparation method and application |
| CN109403499A (en) * | 2018-12-19 | 2019-03-01 | 苏州海德新材料科技股份有限公司 | Viscoelastic damper and its construction and installation structure |
| WO2022103356A1 (en) * | 2020-11-13 | 2022-05-19 | Yildiz Teknik Universitesi | A seismic combination apparatus with elastomer and with friction particularly for use in buildings |
-
1995
- 1995-12-27 JP JP34131495A patent/JPH09177367A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220691A (en) * | 1999-01-29 | 2000-08-08 | Oiles Ind Co Ltd | Vibration energy absorbing device |
| JP2010096243A (en) * | 2008-10-15 | 2010-04-30 | Polsys Kenkyusho:Kk | Base isolation structure and method for manufacturing the same |
| JP6064075B1 (en) * | 2016-08-23 | 2017-01-18 | 株式会社ビービーエム | Seismic isolation device for structure and manufacturing method of seismic isolation device for structure |
| CN106401255A (en) * | 2016-10-09 | 2017-02-15 | 中国建筑第八工程局有限公司 | Combined lead-particle rubber damper |
| CN106567592B (en) * | 2016-11-09 | 2020-05-22 | 中国建筑第八工程局有限公司 | Damper for low yield point steel energy consumption and particle energy consumption |
| CN106567592A (en) * | 2016-11-09 | 2017-04-19 | 中国建筑第八工程局有限公司 | Low-yield point steel energy dissipation and particle energy dissipation damper |
| CN107816125A (en) * | 2017-10-26 | 2018-03-20 | 叶长青 | The structure of basement and superstructure synchronous construction |
| CN107816125B (en) * | 2017-10-26 | 2024-06-07 | 临沂锋立建筑劳务有限公司 | Structure for synchronous construction of basement and superstructure |
| CN109098289A (en) * | 2018-08-27 | 2018-12-28 | 苏州海德新材料科技股份有限公司 | Shock isolating pedestal core material, friction core shock isolating pedestal and its preparation method and application |
| WO2020042390A1 (en) * | 2018-08-27 | 2020-03-05 | 苏州海德新材料科技股份有限公司 | Core material for shock insulation support, shock insulation support having friction core and preparation method therefor |
| US12031601B2 (en) | 2018-08-27 | 2024-07-09 | Suzhou Haider New Material Technology Co., Ltd. | Core material for shock insulation support, shock insulation support having friction core and preparation method therefor |
| CN109403499A (en) * | 2018-12-19 | 2019-03-01 | 苏州海德新材料科技股份有限公司 | Viscoelastic damper and its construction and installation structure |
| WO2022103356A1 (en) * | 2020-11-13 | 2022-05-19 | Yildiz Teknik Universitesi | A seismic combination apparatus with elastomer and with friction particularly for use in buildings |
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