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To allow shear deformation of rubber shoes when an earthquake motion of level 2 or lower occurs, and to restrain shear deformation of rubber shoes when an unexpected earthquake motion exceeding level 2 or ground deformation occurs in order to prevent the rubber shoes from breaking.SOLUTION: In a rubber bearing 10 for bridge installed between an upper structure and a lower structure, and including an upper shoe 11 fixed to a lower surface of the upper structure, a lower shoe 12 fixed to the lower structure, and a rubber shoe 13 provided between the upper shoe 11 and the lower shoe 12, side blocks 21, 22 are provided on both sides holding the rubber shoe 13 along the lower shoe 12 in the bridge axis direction and the direction perpendicular to the bridge axis direction at a distance d, being approximately equivalent to the maximum design displacement during an earthquake assuming a level-2 earthquake motion of the rubber shoe from the upper shoe 11. The lower shoe 12 is fixed to an upper surface of a base plate 16 fixed to the lower structure by bolts 17. The bolts 17 are broken by an earthquake motion exceeding level 2.SELECTED DRAWING: Figure 1
【課題】レベル２以下の地震動まではゴム沓のせん断変形を許容するが、レベル２を超える想定外地震動や地盤変状などが起きた場合にはゴム沓のせん断変形を拘束してゴム沓が破断するのを防止する。【解決手段】上部構造と下部構造との間に設置され、上部構造の下面に固定される上沓１１と、下部構造に固定される下沓１２と、上沓１１と下沓１２との間に設けられたゴム沓１３とを備えた橋梁用ゴム支承１０において、下沓１２上の橋軸方向及び橋軸直角方向にゴム沓１３を挟んだ両側であって、上沓１１からゴム沓のレベル２地震動を想定した地震時最大設計変位にほぼ相当する距離ｄ離れた位置にサイドブロック２１、２２が設けられ、下沓１２は下部構造に固定されたベースプレート１６の上面にボルト１７によって固定され、ボルト１７はレベル２を超える地震動によって破断する。【選択図】図１
To allow shear deformation of rubber shoes when an earthquake motion of level 2 or lower occurs, and to restrain shear deformation of rubber shoes when an unexpected earthquake motion exceeding level 2 or ground deformation occurs in order to prevent the rubber shoes from breaking.SOLUTION: In a rubber bearing 10 for bridge installed between an upper structure and a lower structure, and including an upper shoe 11 fixed to a lower surface of the upper structure, a lower shoe 12 fixed to the lower structure, and a rubber shoe 13 provided between the upper shoe 11 and the lower shoe 12, side blocks 21, 22 are provided on both sides holding the rubber shoe 13 along the lower shoe 12 in the bridge axis direction and the direction perpendicular to the bridge axis direction at a distance d, being approximately equivalent to the maximum design displacement during an earthquake assuming a level-2 earthquake motion of the rubber shoe from the upper shoe 11. The lower shoe 12 is fixed to an upper surface of a base plate 16 fixed to the lower structure by bolts 17. The bolts 17 are broken by an earthquake motion exceeding level 2.SELECTED DRAWING: Figure 1
【課題】レベル２以下の地震動まではゴム沓のせん断変形を許容するが、レベル２を超える想定外地震動や地盤変状などが起きた場合にはゴム沓のせん断変形を拘束してゴム沓が破断するのを防止する。【解決手段】上部構造と下部構造との間に設置され、上部構造の下面に固定される上沓１１と、下部構造に固定される下沓１２と、上沓１１と下沓１２との間に設けられたゴム沓１３とを備えた橋梁用ゴム支承１０において、下沓１２上の橋軸方向及び橋軸直角方向にゴム沓１３を挟んだ両側であって、上沓１１からゴム沓のレベル２地震動を想定した地震時最大設計変位にほぼ相当する距離ｄ離れた位置にサイドブロック２１、２２が設けられ、下沓１２は下部構造に固定されたベースプレート１６の上面にボルト１７によって固定され、ボルト１７はレベル２を超える地震動によって破断する。【選択図】図１
RUBBER BEARINGS FOR BRIDGE
橋梁用ゴム支承
HISHIJIMA YASUHISA (author)
2021-08-05
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
/
F16B
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES
,
Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile
/
F16F
SPRINGS
,
Federn
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