JP2018031145A - Base isolation bearing device for structure and manufacturing method for the same - Google Patents
Base isolation bearing device for structure and manufacturing method for the same Download PDFInfo
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- 238000002955 isolation Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 74
- 239000005060 rubber Substances 0.000 claims abstract description 74
- 238000013016 damping Methods 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 16
- 239000008187 granular material Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000012778 molding material Substances 0.000 claims description 3
- 229910000576 Laminated steel Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000013618 particulate matter Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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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及び構造物用免震支承装置の製造方法に関する。 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, and a manufacturing method of the seismic isolation bearing device for a structure.
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は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.
一方、中空部にガラスビーズ、鉄等の硬質粒状物を最密充填した免震支承装置が提案されている。このような免震構造体では、中空部に最密充填された硬質粒状物同士の摩擦力により減衰効果が発揮される。 On the other hand, seismic isolation bearing devices have been proposed in which the hollow portion is closely packed with hard granular materials such as glass beads and iron. In such a seismic isolation structure, the damping effect is exhibited by the frictional force between the hard granular materials that are closely packed in the hollow portion.
しかしながら、錫などの低降伏点材料により連続体として作製した減衰部材を用いた場合、繰返し変形に対して減衰部材に多数の亀裂５８が発生し易く、繰り返し耐久性が低いという問題がある。また、ガラスビーズ等の硬質粒状物は地震等の際に粒状物同士が摩擦し合うことにより破壊され易く、減衰効果が大きく低下して次の地震発生時に十分なエネルギー吸収を発揮できないおそれがある。 However, when a damping member manufactured as a continuous body using a low yield point material such as tin is used, there is a problem in that a large number of cracks 58 are easily generated in the damping member due to repeated deformation, and repeated durability is low. In addition, hard granular materials such as glass beads are easily broken due to friction between the granular materials in the event of an earthquake, etc., and the damping effect is greatly reduced, and there is a possibility that sufficient energy absorption cannot be exhibited at the occurrence of the next earthquake. .
本発明は、構造物用免震支承装置の製造方法及び構造物用免震支承装置は、前記従来技術の持つ問題点を解決する、構造が簡単で、製造組み立てが容易で免震効果の大きな構造物用免震支承装置及び構造物用免震支承装置の製造方法を提供することを目的とする。 The present invention provides a method for manufacturing a seismic isolation device for a structure and a seismic isolation device for a structure, which solves the problems of the prior art, has a simple structure, is easy to manufacture and assemble, and has a large seismic isolation effect. It aims at providing the manufacturing method of the seismic isolation device for structures, and the seismic isolation device for structures.
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、上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した中央積層ゴム体と、前記中央積層ゴム体に対してリング状の空間を形成して配置され上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した外側積層ゴム体と、前記中央積層ゴム体と前記外側積層ゴム体との間のリング状空間に配置される硬質粒状物又は硬質粉状体が分散したウレタン成形体からなる減衰部材と、を備えることを特徴とする。 In order to solve the above-mentioned problem, the seismic isolation bearing device for a structure of the present invention includes a central laminated rubber body obtained by alternately laminating reinforcing steel plates and rubbers having upper and lower connecting steel plates arranged on the upper and lower sides, and the central laminated rubber body. On the other hand, an outer laminated rubber body in which a reinforcing steel plate and a rubber, in which a ring-shaped space is formed and upper and lower connecting steel plates are arranged on the upper and lower sides, are laminated alternately, and between the central laminated rubber body and the outer laminated rubber body And a damping member made of a urethane molded body in which hard granular materials or hard powder bodies are dispersed.
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の製造方法は、上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した中央積層ゴム体の外周部にリング状の空間をあけて上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した外側積層ゴム体を配置し、前記中央積層ゴム体と前記外側積層ゴム体との間のリング状空間に硬質粒状材又は硬質粉状材を混合したウレタン成形材料を充填し硬質粒状材又は硬質粉状材が分散したウレタン成形体からなる減衰部材を形成することを特徴とする。 Moreover, the manufacturing method of the seismic isolation bearing device for a structure according to the present invention includes a ring-shaped space in the outer peripheral portion of a central laminated rubber body in which reinforcing steel plates and rubbers arranged with upper and lower connecting steel plates are alternately laminated. An outer laminated rubber body in which reinforcing steel plates and rubbers having upper and lower connecting steel sheets arranged on the upper and lower sides are alternately laminated is arranged, and a hard granular material or a hard material is provided in a ring-shaped space between the central laminated rubber body and the outer laminated rubber body. The present invention is characterized in that a damping member made of a urethane molded body in which a hard granular material or a hard powder material is dispersed is filled with a urethane molding material mixed with a powdery material.
上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した中央積層ゴム体と、前記中央積層ゴム体に対してリング状の空間を形成して配置され上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した外側積層ゴム体と、前記中央積層ゴム体と前記外側積層ゴム体との間のリング状空間に配置される硬質粒状物又は硬質粉状体が分散したウレタン成形体からなる減衰部材と、を備えることで、地震時に作用するせん断変形により、減衰部材を構成する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、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。
上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した中央積層ゴム体の外周部にリング状の空間をあけて上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した外側積層ゴム体を配置し、前記中央積層ゴム体と前記外側積層ゴム体との間のリング状空間に硬質粒状材又は硬質粉状材を混合したウレタン成形材料を充填し硬質粒状材又は硬質粉状材が分散したウレタン成形体からなる減衰部材を形成することで、減衰部材をリング状空間に挿入配置する工程を省略することができ効率のよい免震支承製造方法とすることが可能となる。
A central laminated rubber body in which reinforcing steel plates and rubbers with upper and lower connected steel plates arranged on top and bottom are alternately laminated, and a ring-shaped space is arranged with respect to the central laminated rubber body, and upper and lower connected steel plates are arranged up and down. An outer laminated rubber body in which reinforcing steel plates and rubber are alternately laminated, and a urethane in which hard granular materials or hard powder bodies arranged in a ring-shaped space between the central laminated rubber body and the outer laminated rubber body are dispersed. A hard granular material or a hard powder material in a urethane molded body in which the hard granular material or the hard powder material constituting the attenuation member is dispersed by shear deformation that acts during an earthquake. Seismic energy can be attenuated by causing friction with urethane.
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, the hard granular material or hard powder material is made of a material with a small environmental load, and the hard granular material or hard powder material has a low rate of friction and collision with each other, so the hard granular material or hard powder material is not destroyed and is attenuated. It is possible to maintain the performance for a long time, optimize the volume ratio and particle size, and make the polyurethane molded body by shear deformation of the laminated rubber body by interspersing many stress concentration points in the urethane molded body It is possible to uniformly shear and deform the entire damping member.
Laminated steel sheets and rubbers with upper and lower connecting steel plates arranged vertically, with a ring-shaped space in the outer periphery of a central laminated rubber body with laminated upper and lower connecting steel plates and rubber. The outer laminated rubber body is disposed, and the ring-shaped space between the central laminated rubber body and the outer laminated rubber body is filled with a urethane molding material mixed with a hard granular material or a hard powdery material, and the hard granular material or the hard By forming a damping member made of a urethane molded body in which a powdery material is dispersed, the step of inserting and arranging the damping member in the ring-shaped space can be omitted, and an efficient seismic isolation bearing manufacturing method can be achieved. Become.
本発明の実施形態を図により説明する。図１〜図４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. FIGS. 1-4 is a longitudinal cross-sectional view which shows one Embodiment of the seismic
構造物用免震支承装置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毎積層し、上下に上連結鋼板５と下連結鋼板６を配置し、加硫成形により一体化して形成される。
The seismic isolation device for a
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１２を開けてリング状の外側積層ゴム体７を配置する。外側積層ゴム体７は、ゴム層８と補強鋼板９を交互に鉛直方向に複数毎積層し、上下に上連結鋼板１０と下連結鋼板１１を配置し、加硫成形により一体化して形成される。
A ring-shaped outer laminated
中央積層ゴム体２の下連結鋼板６の両端にリング状の下押え型枠１３を載置するための段部６ａが形成される。また、外側積層ゴム体７の下連結鋼板１１の内側にリング状の下押え型枠１３を載置するための段部１１ａが形成される。
中央積層ゴム体２の上連結５の両端にリング状の上押え型枠１４を載置するための段部５ａが形成される。また、外側積層ゴム体７の上連結鋼板１０の内側にリング状の上押え型枠１４を載置するための段部１０ａが形成される。
図４は、中央積層ゴム体２と外側積層ゴム体７との間のリング状空間１２に減衰部材１５を形成する第一工程を示す図である。この工程では、中央積層ゴム体２の下連結鋼板６に形成した段部６ａと外側積層ゴム体７の下連結鋼板１１に形成した段部１１ａに下押え型枠１３を載置し固定ボルト１６で固定する。
FIG. 4 is a view showing a first step of forming the
減衰部材１５を構成するウレタン成形体を形成するため、ポリオール、イソシアネートの主原料に触媒、発泡剤、整泡剤等と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の上部から充填する。
In order to form the urethane molded body that constitutes the
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 a urethane molded body is insufficient. If the amount exceeds 18% by volume, the content of the urethane composition decreases, and hard granular materials or hard powders This is because the damping effect of vibration energy cannot be sufficiently obtained due to the friction.
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
図３は、リング状空間１２への上記混合材料の充填が終了すると、中央積層ゴム体２の上連結鋼板５に形成した段部５ａと外側積層ゴム体７の上連結鋼板１０に形成した段部１０ａに上押え型枠１４を載置し固定ボルト１６で固定する。
FIG. 3 shows a
この状態でウレタン成形混合物を成形すると発泡により体積が増加するがリング状空間１２の上下が上押え型枠１４と下押え型枠１３で閉じられているため減衰部材１５は加圧成形の状態で成形される。
When the urethane molding mixture is molded in this state, the volume increases due to foaming. However, since the upper and lower sides of the ring-
ここまでの製造工程は、工場で実施される。出来上がった構造物用免震支承装置１は、現場に搬送され、上部構造と下部構造の間に設置される。
The manufacturing process so far is carried out at the factory. The completed structure
このように構成された構造物用免震支承装置１は、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。
In the seismic isolation bearing
また、減衰部材１５の中央ゴム体２と外側ゴム体７間のリング状空間１２への挿入配置の工程を省略することができ効率のよい免震支承の製造方法とすることが可能となる。
Further, the step of inserting and arranging the damping
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：上連結鋼板、５ａ：段部、６：下連結鋼板、６ａ：段部、７：外側積層ゴム体、８：ゴム層、９：補強鋼板、１０：上連結鋼板、１０ａ：段部、１１：下連結鋼板、１１ａ：段部、１２：リング状空間、１３：下押え型枠、１４：上押え型枠、１５：減衰部材、１６：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 connecting steel plate, 5a: stepped portion, 6: lower connecting steel plate, 6a: stepped portion, 7 : Outer laminated rubber body, 8: rubber layer, 9: reinforcing steel plate, 10: upper connecting steel plate, 10a: stepped portion, 11: lower connecting steel plate, 11a: stepped portion, 12: ring-shaped space, 13: lower presser formwork 14: Upper presser formwork, 15: Damping member, 16: Fixing bolt
Claims (3)
前記中央積層ゴム体に対してリング状の空間を形成して配置され上下に上下連結鋼板を配置した補強鋼板とゴムとを交互に積層した外側積層ゴム体と、
前記中央積層ゴム体と前記外側積層ゴム体との間のリング状空間に配置される硬質粒状物又は硬質粉状体が分散したウレタン成形体からなる減衰部材と、
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 rubbers arranged with upper and lower connecting steel plates above and below are alternately laminated;
An outer laminated rubber body in which a reinforcing steel plate and rubber are alternately laminated by forming a ring-shaped space with respect to the central laminated rubber body and arranging upper and lower connecting steel plates;
A damping member made of a urethane molded body in which hard granular materials or hard powder materials are disposed in a ring-shaped space between the central laminated rubber body and the outer laminated rubber body,
A seismic isolation bearing device for structures, comprising:
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