JP2018138809A - Base isolation bearing device for structure - Google Patents
Base isolation bearing device for structure Download PDFInfo
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- JP2018138809A JP2018138809A JP2017033499A JP2017033499A JP2018138809A JP 2018138809 A JP2018138809 A JP 2018138809A JP 2017033499 A JP2017033499 A JP 2017033499A JP 2017033499 A JP2017033499 A JP 2017033499A JP 2018138809 A JP2018138809 A JP 2018138809A
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- 238000002955 isolation Methods 0.000 title claims abstract description 27
- 229920001971 elastomer Polymers 0.000 claims abstract description 69
- 239000005060 rubber Substances 0.000 claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 15
- 239000008187 granular material Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 31
- 238000013016 damping Methods 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 239000000843 powder Substances 0.000 description 24
- 230000002238 attenuated effect Effects 0.000 description 6
- 230000005489 elastic deformation Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Landscapes
- Bridges Or Land Bridges (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
- Springs (AREA)
- Vibration Dampers (AREA)
Abstract
Description
本発明は、建築物、橋梁等の構造物の上部構造と下部構造との間に設置される構造物用免震支承装置に関する。 The present invention relates to a seismic isolation bearing device for a structure installed between an upper structure and a lower structure of a structure such as a building or a bridge.
ビルや橋梁などの構造物において地震の際の揺れを抑制するため、免震支承装置が使用される場合がある。この免震支承装置として、金属などの剛性板とゴムなどの弾性板とを交互に積層した積層弾性体の中央部に円筒状の中空部を形成し、前記中空部に減衰部材として円柱状の鉛体（鉛プラグ）が嵌め込まれるものが提案されている。 In some cases, a seismic isolation bearing device is used in a structure such as a building or a bridge to suppress shaking during an earthquake. As this seismic isolation bearing device, a cylindrical hollow portion is formed at the center of a laminated elastic body in which a rigid plate such as metal and an elastic plate such as rubber are alternately laminated, and a cylindrical member as a damping member is formed in the hollow portion. The thing in which a lead body (lead plug) is inserted is proposed.
このような構造の免震支承装置は、積層されたゴム等の弾性体のせん断変形時に内部の鉛プラグの塑性変形によりエネルギーを吸収することができる。従って、この免震支承装置を構造物と基礎との間に配置しておくことで、地震の際、積層されたゴム等により構造物の固有周期を地震の周期からずらすとともに、減衰部材により縦揺れや横揺れのエネルギーが吸収され、構造物の破壊を防ぐ効果が得られる。 The seismic isolation bearing device having such a structure can absorb energy by plastic deformation of an internal lead plug during shear deformation of an elastic body such as laminated rubber. Therefore, by placing this seismic isolation bearing device between the structure and the foundation, the natural period of the structure is shifted from the period of the earthquake by laminated rubber or the like in the event of an earthquake, and the damping member vertically The energy of shaking and rolling is absorbed, and the effect of preventing the destruction of the structure is obtained.
近年、上記のような免震支承装置の減衰部材に関しては、環境負荷の観点から鉛以外の代替材料が望まれる傾向にある。鉛以外の減衰部材として、錫などの降伏点の低い材料からなる減衰部材を用いた免震支承装置が提案されている。 In recent years, regarding the damping member of the seismic isolation bearing device as described above, alternative materials other than lead tend to be desired from the viewpoint of environmental load. As a damping member other than lead, a seismic isolation bearing device using a damping member made of a material having a low yield point such as tin has been proposed.
また、鉛プラグ等の金属を用いない免震支承として、特開２００５−２２１０４６号公報には、積層弾性体の中央部に、積層弾性体を貫通する弾性体中空部２８が形成され、弾性体中空部に、素線２９をコイル状に巻き回したエネルギー吸収部材を巻き回し方向とＸ方向とが一致する方向で積層弾性体の内側に密着するように挿入し、弾性体中空部に充填部材を充填する免震支承装置が開示されている。 Further, as a seismic isolation bearing that does not use a metal such as a lead plug, Japanese Patent Application Laid-Open No. 2005-221406 has an elastic body hollow portion 28 penetrating the laminated elastic body formed at the center of the laminated elastic body, and the elastic body. An energy absorbing member in which the wire 29 is wound in a coil shape is inserted into the hollow portion so that the winding direction and the X direction are in close contact with each other inside the laminated elastic body, and the elastic member is filled with the filling member A seismic isolation bearing device is disclosed.
特開平１１−２７０６２１号公報には、弾性材料層と剛性材料層が軸心方向に交互に積層されてなる積層体の軸心部に軸心方向に沿って貫通するコイル形状の振動エネルギー吸収部材を埋設してなる積層ゴム支承であって、前記振動エネルギー吸収部材が、与えられた応力が弾性限度を超えると塑性変形を起こしその状態を維持しうる弾塑性材料を中空形状にし、その外周を前記積層体の内周面に密着させてなるものであることを特徴とする免震支承装置が開示されている。 Japanese Patent Laid-Open No. 11-270621 discloses a coil-shaped vibration energy absorbing member that penetrates along the axial center of a laminated body in which elastic material layers and rigid material layers are alternately laminated in the axial direction. The vibration energy absorbing member has a hollow shape made of an elastoplastic material capable of causing plastic deformation and maintaining the state when the applied stress exceeds the elastic limit. There is disclosed a seismic isolation bearing device characterized by being in close contact with the inner peripheral surface of the laminate.
しかしながら、従来のコイルスプリングを用いるエネルギー吸収部材は、コイルスプリングの弾性変形のみで地震エネルギーを減衰するもので、コイルの形状が径に比べて高さが高い細長形状であるためコイルの剛性が低く地震エネルギーの減衰効率が十分でないという問題を有している。 However, the conventional energy absorbing member using the coil spring attenuates the seismic energy only by the elastic deformation of the coil spring, and the coil has a slender shape whose height is higher than the diameter, so the rigidity of the coil is low. There is a problem that the attenuation efficiency of earthquake energy is not sufficient.
本発明は、前記従来技術の持つ問題点を解決する、構造が簡単で、地震エネルギーの減衰効率の高い構造物用免震支承装置を提供することを目的とする。 An object of the present invention is to provide a seismic isolation bearing device for a structure that solves the problems of the prior art and has a simple structure and high seismic energy attenuation efficiency.
本発明の構造物用免震支承装置は、前記課題を解決するために、補強鋼板とゴムとを交互に積層した中央積層ゴム体と、中央積層ゴム体に対してリング状空間を形成して配置され補強鋼板とゴムとを交互に積層した外側積層ゴム体と、中央積層ゴム体と外側積層ゴム体との間のリング状空間に配置される断面長方形の板状部材を螺旋状に巻回した板状コイルスプリングとウレタン成形体からなるリング状減衰部材と、外側積層ゴム体の上下に配置される外側上下連結鋼板と、中央積層ゴム体の上下に配置される中央上下連結鋼板と、を備えることを特徴とする。 In order to solve the above-mentioned problems, the seismic isolation device for a structure of the present invention includes a central laminated rubber body in which reinforcing steel plates and rubber are alternately laminated, and a ring-shaped space formed on the central laminated rubber body. An outer laminated rubber body in which laminated reinforcing steel plates and rubber are alternately laminated, and a plate member having a rectangular cross section arranged in a ring-shaped space between the central laminated rubber body and the outer laminated rubber body are spirally wound. A ring-shaped damping member composed of a plate coil spring and a urethane molded body, an outer vertical connecting steel plate disposed above and below the outer laminated rubber body, and a central vertical connecting steel plate arranged above and below the central laminated rubber body, It is characterized by providing.
また、本発明の構造物用免震支承装置は、前記ウレタン成形体からなる減衰部材が、鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせで含有量１〜１８体積％、粒径１〜２０ｍｍの硬質粒状物又は硬質粉状体を含むことを特徴とする。 Moreover, in the seismic isolation bearing device for a structure of the present invention, the damping member made of the urethane molded body has a content of 1 to 18% by volume and a particle size of any one or a combination of iron, aluminum and ceramic. It includes 1 to 20 mm of hard granular material or hard powder.
また、本発明の構造物用免震支承装置は、外側上下連結鋼板の内側と中央上下連結鋼板の外側に段部を形成し、段部に上下押え型枠を配置することを特徴とする。 Moreover, the seismic isolation bearing device for a structure according to the present invention is characterized in that a step portion is formed on the inside of the outer vertical connecting steel plate and the outer side of the central vertical connecting steel plate, and the upper and lower presser form is disposed on the step portion.
補強鋼板とゴムとを交互に積層した中央積層ゴム体と、中央積層ゴム体に対してリング状空間を形成して配置され補強鋼板とゴムとを交互に積層した外側積層ゴム体と、中央積層ゴム体と外側積層ゴム体との間のリング状空間に配置される断面長方形の板状部材を螺旋状に巻回した板状コイルスプリングとウレタン成形体からなるリング状減衰部材と、外側積層ゴム体の上下に配置される外側上下連結鋼板と、中央積層ゴム体の上下に配置される中央上下連結鋼板と、を備えることで、板状コイルスプリングの径に対する高さの比が大きく板状なので剛性を大きくすることが可能となり板状コイルスプリングの弾性変形による地震エネルギー減衰性能を向上させることが可能となる。また、板状コイルスプリングの周囲がウレタン成形体で充填されているので、環状空間への雨水等の浸入を防止でき板状コイルスプリングの腐食を防止し長寿命化することが可能になる。さらに、板状コイルスプリングの弾性変形に伴い板状コイルスプリングとウレタン成形体との間に摩擦が発生し地震エネルギーを減衰することが可能となる。
ウレタン成形体からなる減衰部材が、鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせで含有量が１〜１８体積％、粒径１〜２０ｍｍの硬質粒状物又は硬質粉状体を含むことで、地震時に作用するせん断変形により、硬質粒状材又は硬質粉状材が分散したウレタン成形体中の硬質粒状材又は硬質粉状材がウレタンと摩擦を起こすことで地震エネルギーを減衰することが可能となり、鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせで含有量が１〜１８体積％、粒径１〜２０ｍｍの硬質粒状物又は硬質粉状体を含むことで、硬質粒状材又は硬質粉状材を環境負荷が小さい材料とし、硬質粒状材又は硬質粉状材同士が摩擦、衝突する割合が少ないので硬質粒状材又は硬質粉状材が破壊されないので減衰性能を長期間維持することが可能となり、体積率、粒径の最適化を図り、ウレタン成形体中の応力集中点を多数点在させることにより、積層ゴム体のせん断変形によってウレタン成形体からなる減衰部材全体を均一にせん断変形させることが可能となる。
外側上下連結鋼板の内側と中央上下連結鋼板の外側に段部を形成し、段部に上下押え型枠を配置することで、ウレタン成形体を加圧状態で成形することが可能となる。
A central laminated rubber body in which reinforcing steel plates and rubber are alternately laminated, an outer laminated rubber body in which a ring-shaped space is formed with respect to the central laminated rubber body, and laminated alternately with reinforcing steel plates and rubber, and central lamination A ring-shaped damping member comprising a plate-shaped coil spring and a urethane molded body spirally wound with a plate-shaped member having a rectangular cross section disposed in a ring-shaped space between the rubber body and the outer laminated rubber body, and an outer laminated rubber By providing the outer upper and lower connecting steel plates arranged above and below the body and the central upper and lower connecting steel plates arranged above and below the central laminated rubber body, the ratio of the height to the diameter of the plate coil spring is large and plate-like The rigidity can be increased, and the seismic energy attenuation performance due to the elastic deformation of the plate coil spring can be improved. In addition, since the periphery of the plate coil spring is filled with the urethane molded body, it is possible to prevent the intrusion of rainwater or the like into the annular space, thereby preventing the plate coil spring from being corroded and extending its life. Further, with the elastic deformation of the plate coil spring, friction is generated between the plate coil spring and the urethane molded body, and the seismic energy can be attenuated.
The damping member made of a urethane molded body includes a hard granular material or a hard powdery material having a content of 1 to 18% by volume and a particle size of 1 to 20 mm in any one or a combination of iron, aluminum, and ceramic. Therefore, due to the shear deformation that acts during an earthquake, the hard granular material or hard powder material in the urethane molded body in which the hard granular material or hard powder material is dispersed may attenuate the earthquake energy by causing friction with urethane. It becomes possible to contain hard granular materials or hard powders having a content of 1 to 18% by volume and a particle size of 1 to 20 mm in any one or a combination of iron, aluminum, and ceramic. Or hard powder material is made of material with low environmental impact, and hard granular material or hard powder material is less likely to rub and collide with each other, so hard granular material or hard powder material is not destroyed, so it is attenuated Performance can be maintained for a long time, the volume ratio and particle size are optimized, and a large number of stress concentration points are scattered in the urethane molded body. It is possible to uniformly shear and deform the entire damping member.
By forming a step portion on the inner side of the outer vertical connecting steel plate and on the outer side of the central upper and lower connecting steel plate, and arranging the upper and lower pressing molds on the step portion, it becomes possible to form the urethane molded body in a pressurized state.
本発明の実施形態を図により説明する。図１〜図３は、本発明の構造物用免震支承装置１の一実施形態を示す縦断面図である。
An embodiment of the present invention will be described with reference to the drawings. 1-3 is a longitudinal cross-sectional view which shows one Embodiment of the seismic
免震支承装置１は、平面視円形の中央積層ゴム体２を備えている。中央積層ゴム体２は、ゴム層３と補強鋼板４を交互に鉛直方向に複数枚積層し、上下に中央上連結鋼板５と中央下連結鋼板６を配置し、加硫成形により一体化して形成する。
The seismic isolation bearing
中央積層ゴム体２の外側に中央積層ゴム体２に対して所定間隔のリング状空間１０を開けて外側積層ゴム体７を配置する。外側積層ゴム体７は、ゴム層３と補強鋼板４を交互に鉛直方向に複数枚積層し、上下に外側上連結鋼板８と外側下連結鋼板９を配置し、加硫成形により一体化して形成する。
The outer laminated
図４（a）（ｂ）に示すように、外側上連結鋼板８の内側に段部８aを形成し、中央上連結鋼板５の外側に段部５aを形成する。外側下連結鋼板９の内側に段部９aを形成し、中央下連結鋼板６の外側に段部６aを形成する。
As shown in FIGS. 4 (a) and 4 (b), a
先ず、外側下連結鋼板９の段部９aと中央下連結鋼板６の段部６aに環状の下押え型枠１１を設置し固定ボルト１５で外側下連結鋼板９と中央下連結鋼板６に固定する。
First, an annular
下押え型枠１１が固定された環状空間１０に、図３に示される断面が長方形の板状部材を螺旋状に巻回した板状コイルスプリング１２を配置する。
A plate-
板状コイルスプリング１２が配置された環状空間１０に、ウレタン成形体１４を形成するため、ポリオール、イソシアネートの主原料に触媒、発泡剤、整泡剤等の材料をリング状空間１０の上部から投入する。材料の投入が終了すると、外側上連結鋼板８の段部８aと中央上連結鋼板５の段部５aに上押え型枠１３を設置し、固定ボルト１５で外側上連結鋼板８と中央上連結鋼板５に固定する。板状コイルスプリング１２は、上押え型枠１３により圧縮状態になる高さとする。
In order to form the urethane molded
ウレタン成形体１４は形成工程で材料が膨張するので、板状コイルスプリング１２が配置され上下に上押え型枠１３と下押え型枠１１が固定された密封状態の環状空間１０でウレタン成形体１４が加圧成形される。
Since the material of the urethane molded
このようにして形成がれた構造物用免震支承装置１は、環状空間１０に配置された板状コイルスプリング１２が断面形状長方形の板状部材でスプリングの径と高さの比が大きいので剛性が大きく弾性変形による地震エネルギーの減衰性能が高い。
In the
板状コイルスプリング１２が配置された環状空間１０にはウレタン成形体１４が充填されているので、環状空間１０内への雨水等の浸入が防止され、板状コイルスプリング１２の腐食が防止される。
Since the
また、板状コイルスプリング１２が地震の応力により弾性変形する際、板状コイルスプリング１２とウレタン成形体との間に摩擦力が生じ、摩擦減衰で地震エネルギーを吸収することが可能となる。
Further, when the plate-
他の実施形態では、ウレタン成形体１４を形成するため、ポリオール、イソシアネートの主原料に触媒、発泡剤、整泡剤等の材料に加えて、環境負荷の少ない鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせた硬質粒状物又は硬質粉状体を混合した材料をリング状空間１２の上部から投入する。
In another embodiment, in order to form the urethane molded
硬質粒状物又は硬質粉状体のウレタン成形体中の含有率を１〜１８体積％、とする。１体積％未満では、ウレタン成形体１４からなる減衰材の塑性変形能の改善効果が不十分であり、１８体積％超ではウレタン組成物の含有率が減少し、硬質粒状物又は硬質粉状体同士の摩擦により振動エネルギーの減衰効果が十分に得られないためである。
Let the content rate in the urethane molded object of a hard granular material or a hard powder form be 1-18 volume%. If the amount is less than 1% by volume, the effect of improving the plastic deformability of the damping material made of the urethane molded
硬質粒状物又は硬質粉状体の粒径を１〜２０ｍｍとする。硬質粒状物又は硬質粉状体の粒径が１ｍｍ未満であると大きさが不十分であり応力集中点として機能しない。一方、硬質粒状物又は硬質粉状体の粒径球体が２０ｍｍ超であるとウレタン成形体１４からなる減衰部材１５に硬質粒状物又は硬質粉状体を均一に分散させることが困難となる。
The particle size of the hard granular material or hard powder is set to 1 to 20 mm. If the particle size of the hard granular material or hard powder is less than 1 mm, the particle size is insufficient and does not function as a stress concentration point. On the other hand, when the particle size sphere of the hard granular material or the hard powder is more than 20 mm, it is difficult to uniformly disperse the hard granular material or the hard powder in the damping
地震時に作用するせん断変形により減衰部材１５中の硬質粒状材又は硬質粉状材がウレタンと摩擦し地震エネルギーを減衰する。硬質粒状材又は硬質粉状材同士が摩擦、衝突する割合が少ないので、硬質粒状材又は硬質粉状材が破壊しないので長期的に減衰性能を維持することができる。
The hard granular material or the hard powdery material in the damping
以上のように構成された構造物用免震支承装置１は、板状コイルスプリング１２の径に対する高さの比が大きく板状なので剛性を大きくすることが可能となり板状コイルスプリング１２の弾性変形による地震エネルギー減衰性能を向上させることが可能となる。また、板状コイルスプリング１２の周囲がウレタン成形体１４で充填されているので、環状空間への雨水等の浸入を防止でき板状コイルスプリング１２の腐食を防止し長寿命化することが可能になる。さらに、板状コイルスプリング１２の弾性変形に伴い板状コイルスプリング１２とウレタン成形体１４との間に摩擦力が発生し地震エネルギーを減衰することが可能となる。
Since the structure-based seismic
１：構造物用免震支承装置、２：中央積層ゴム体、３：ゴム層、４：補強鋼板、５：中央上連結鋼板、５ａ：段部、６：中央下連結鋼板、６ａ：段部、７：外側積層ゴム体、８：外側上連結鋼板、８ａ：段部、９：外側下連結鋼板、９ａ：段部、１０：環状空間、１１：下押え型枠、１２：板状コイルスプリング、１３：上押え型枠、１４：ウレタン成形体、１５：固定ボルト 1: seismic isolation device for structure, 2: central laminated rubber body, 3: rubber layer, 4: reinforcing steel plate, 5: upper center connecting steel plate, 5a: stepped portion, 6: center lower connecting steel plate, 6a: stepped portion , 7: outer laminated rubber body, 8: outer upper connecting steel plate, 8a: stepped portion, 9: outer lower connecting steel plate, 9a: stepped portion, 10: annular space, 11: lower presser formwork, 12: plate coil spring , 13: Upper presser formwork, 14: Urethane molded body, 15: Fixing bolt
本発明の構造物用免震支承装置は、前記課題を解決するために、補強鋼板とゴムとを交互に積層した中央積層ゴム体と、中央積層ゴム体に対してリング状空間を形成して配置され補強鋼板とゴムとを交互に積層した外側積層ゴム体と、外側積層ゴム体の上下に配置される外側上下連結鋼板と、中央積層ゴム体の上下に配置される中央上下連結鋼板と、外側上下連結鋼板の内側と中央上下連結鋼板の外側に形成される段部に配置されるリング状の上下押え型枠と、中央積層ゴム体と外側積層ゴム体との間のリング状空間にリング状上下押え型枠により圧縮状態で配置される断面長方形の板状部材を螺旋状に巻回した板状コイルスプリングと硬質粒状物又は硬質粉状体が分散されたウレタン成形体からなるリング状減衰部材と、を備えることを特徴とする。
In order to solve the above-mentioned problems, the seismic isolation device for a structure of the present invention includes a central laminated rubber body in which reinforcing steel plates and rubber are alternately laminated, and a ring-shaped space formed on the central laminated rubber body. An outer laminated rubber body in which laminated reinforcing steel plates and rubber are alternately laminated, outer upper and lower connected steel plates arranged above and below the outer laminated rubber body, and central upper and lower connected steel plates arranged above and below the central laminated rubber body, ring the ring-shaped space between the ring-shaped upper and lower pressing mold disposed in a stepped portion formed on the outside of the inner and central vertical connecting steel outer vertical connecting steel plates, the central laminated rubber body and the outer laminated rubber body Ring-shaped damping consisting of a plate-shaped coil spring spirally wound with a plate-shaped member with a rectangular cross section arranged in a compressed state by a cylindrical upper and lower press form and a urethane molded product in which hard granular materials or hard powder materials are dispersed And a member To.
また、本発明の構造物用免震支承装置は、ウレタン成形体中に分散される硬質粒状物又は硬質粉状体を、鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせで含有量１〜１８体積％、粒径１〜２０ｍｍとすることを特徴とする。
Moreover, the seismic isolation bearing device for a structure of the present invention contains a hard granular material or a hard powder dispersed in a urethane molded body in one or a combination of two or more of iron, aluminum, and ceramic. It is characterized by being 1-18 volume% and a particle size of 1-20 mm.
補強鋼板とゴムとを交互に積層した中央積層ゴム体と、中央積層ゴム体に対してリング状空間を形成して配置され補強鋼板とゴムとを交互に積層した外側積層ゴム体と、外側積層ゴム体の上下に配置される外側上下連結鋼板と、中央積層ゴム体の上下に配置される中央上下連結鋼板と、外側上下連結鋼板の内側と中央上下連結鋼板の外側に形成される段部に配置されるリング状の上下押え型枠と、中央積層ゴム体と外側積層ゴム体との間のリング状空間にリング状上下押え型枠により圧縮状態で配置される断面長方形の板状部材を螺旋状に巻回した板状コイルスプリングと硬質粒状物又は硬質粉状体が分散されたウレタン成形体からなるリング状減衰部材と、を備えることで、板状コイルスプリングの径に対する高さの比が大きく板状なので剛性を大きくすることが可能となり板状コイルスプリングの弾性変形による地震エネルギー減衰性能を向上させることが可能となる。また、板状コイルスプリングの周囲に硬質粒状物又は硬質粉状体が分散されたウレタン成形体で充填されているので、環状空間への雨水等の浸入を防止でき板状コイルスプリングの腐食を防止し長寿命化することが可能になる。さらに、板状コイルスプリングの弾性変形に伴い板状コイルスプリングと硬質粒状物又は硬質粉状体が分散されたウレタン成形体との間に摩擦が発生し地震エネルギーを減衰することが可能となる。
ウレタン成形体中に分散される硬質粒状物又は硬質粉状体を、鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせで含有量が１〜１８体積％、粒径１〜２０ｍｍの硬質粒状物又は硬質粉状体を含むことで、地震時に作用するせん断変形により、硬質粒状材又は硬質粉状材が分散したウレタン成形体中の硬質粒状材又は硬質粉状材がウレタンと摩擦を起こすことで地震エネルギーを減衰することが可能となり、鉄、アルミニウム、セラミックのいずれか１種又は２種以上組み合わせで含有量が１〜１８体積％、粒径１〜２０ｍｍの硬質粒状物又は硬質粉状体を含むことで、硬質粒状材又は硬質粉状材を環境負荷が小さい材料とし、硬質粒状材又は硬質粉状材同士が摩擦、衝突する割合が少ないので硬質粒状材又は硬質粉状材が破壊されないので減衰性能を長期間維持することが可能となり、体積率、粒径の最適化を図り、ウレタン成形体中の応力集中点を多数点在させることにより、積層ゴム体のせん断変形によってウレタン成形体からなる減衰部材全体を均一にせん断変形させることが可能となる。
A central laminated rubber body in which reinforcing steel plates and rubber are alternately laminated, an outer laminated rubber body in which a ring-shaped space is formed with respect to the central laminated rubber body, and an outer laminated rubber body in which reinforcing steel plates and rubber are alternately laminated, and outer lamination On the upper and lower connecting steel plates arranged above and below the rubber body, the central upper and lower connecting steel plates arranged above and below the central laminated rubber body, the step formed on the inside of the outer vertical connecting steel plate and the outside of the central vertical connecting steel plate helix and the ring-shaped upper and lower pressing mold being arranged, the rectangular cross section of the plate-like member disposed in a compressed state in a ring-shaped space by a ring-shaped upper and lower pressing mold between the central laminated rubber body and the outer laminated rubber body A plate-shaped coil spring wound in a ring and a ring-shaped damping member made of a urethane molded product in which hard granular materials or hard powders are dispersed , so that the ratio of the height to the diameter of the plate-shaped coil spring is Because it ’s large It is possible to improve the seismic energy damping performance due becomes plate-shaped coil elastic deformation of the spring is possible to increase the resistance. In addition, since the periphery of the plate coil spring is filled with a urethane molded product in which hard granular materials or hard powder is dispersed, it is possible to prevent intrusion of rainwater into the annular space and prevent corrosion of the plate coil spring. However, it is possible to extend the service life. Furthermore, with the elastic deformation of the plate coil spring, friction is generated between the plate coil spring and the urethane molded body in which the hard granular material or the hard powder material is dispersed , and the seismic energy can be attenuated.
A hard granular material or hard powder dispersed in a urethane molded body having a content of 1 to 18% by volume and a particle size of 1 to 20 mm in any one or a combination of iron, aluminum and ceramic. By including the granular material or hard powdery material, the hard granular material or hard powdery material in the urethane molded product in which the hard granular material or hard powdery material is dispersed causes friction with urethane due to shear deformation acting during an earthquake. Seismic energy can be attenuated, and hard granular materials or hard powders with a content of 1 to 18% by volume and a particle size of 1 to 20 mm in any one or a combination of iron, aluminum and ceramic By including the body, the hard granular material or the hard powder material is made a material with a small environmental load, and the hard granular material or the hard powder material has a small ratio of friction and collision between the hard granular material or the hard powder material. Since it is not destroyed, it is possible to maintain the damping performance for a long period of time, optimize the volume ratio and particle size, and distribute many stress concentration points in the urethane molded product. It is possible to uniformly shear and deform the entire damping member made of the molded body.
Claims (3)
中央積層ゴム体に対してリング状空間を形成して配置され補強鋼板とゴムとを交互に積層した外側積層ゴム体と、
中央積層ゴム体と外側積層ゴム体との間のリング状空間に配置される断面長方形の板状部材を螺旋状に巻回した板状コイルスプリングとウレタン成形体からなるリング状減衰部材と、
外側積層ゴム体の上下に配置される外側上下連結鋼板と、
中央積層ゴム体の上下に配置される中央上下連結鋼板と、
を備えることを特徴とする構造物用免震支承装置。 A central laminated rubber body in which reinforcing steel plates and rubber are alternately laminated;
An outer laminated rubber body in which a ring-shaped space is formed with respect to the central laminated rubber body and the reinforcing steel sheet and the rubber are alternately laminated;
A ring-shaped damping member comprising a plate-shaped coil spring and a urethane molded body spirally wound with a plate-shaped member having a rectangular cross section disposed in a ring-shaped space between the central laminated rubber body and the outer laminated rubber body;
Outer upper and lower connecting steel plates disposed above and below the outer laminated rubber body,
Central upper and lower connecting steel plates arranged above and below the central laminated rubber body,
A seismic isolation bearing device for structures, comprising:
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