A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ANTISEISMIC STRUCTURE FOR BRIDGE
PROBLEM TO BE SOLVED: To provide an antiseismic structure for a bridge for dealing with seismic ground motions of magnitudes below a prescribed level, also capable of absorbing seismic energy of seismic ground motions of magnitudes above the prescribed level in directions parallel and perpendicular to the bridge, at the same time offering high durability, ease of inspection and maintenance, and ease of installation and replacement.SOLUTION: An antiseismic structure for a bridge supports a bridge girder with a bridge pier via a movable support, and has a friction damper installed in a range between the angle parallel to the bridge axis and the angle normal to the bridge axis, between a wall part on one side or a top part in the bridge axis direction of the bridge pier and a lower part or a side part of the bridge girder above the bridge pier. The friction damper has a mechanism in which an outer surface of a column body and an inner surface of a tubular body slide to make the damper displaced in the axial direction while retaining a certain friction load.
【課題】 所定レベル以下の地震動の地震に対応するとともに、所定レベルを超える地震動の大規模地震に対しても、橋梁と平行の方向及び橋梁と直角方向の震動エネルギーを吸収することができ、耐久性及び優れた検査、メンテナンス性を有し、さらに設置や取り換えが容易にできる橋梁耐震構造を提供する。【解決手段】 橋桁を可動支承を介して橋脚で支持する橋梁の耐震構造であって、前記橋脚の橋軸方向の片方の壁部又は上部と、前記橋脚の上方の橋桁の下部又は側部との間に、橋軸方向と平行の角度から橋軸直角方向の角度の範囲で摩擦ダンパーを設けた橋梁耐震構造であり、前記摩擦ダンパーが、柱体の外面と筒体の内面が摺動して、一定の摩擦荷重を保持したまま軸方向に変位する機構を有することを特徴とする。【選択図】図１
ANTISEISMIC STRUCTURE FOR BRIDGE
PROBLEM TO BE SOLVED: To provide an antiseismic structure for a bridge for dealing with seismic ground motions of magnitudes below a prescribed level, also capable of absorbing seismic energy of seismic ground motions of magnitudes above the prescribed level in directions parallel and perpendicular to the bridge, at the same time offering high durability, ease of inspection and maintenance, and ease of installation and replacement.SOLUTION: An antiseismic structure for a bridge supports a bridge girder with a bridge pier via a movable support, and has a friction damper installed in a range between the angle parallel to the bridge axis and the angle normal to the bridge axis, between a wall part on one side or a top part in the bridge axis direction of the bridge pier and a lower part or a side part of the bridge girder above the bridge pier. The friction damper has a mechanism in which an outer surface of a column body and an inner surface of a tubular body slide to make the damper displaced in the axial direction while retaining a certain friction load.
【課題】 所定レベル以下の地震動の地震に対応するとともに、所定レベルを超える地震動の大規模地震に対しても、橋梁と平行の方向及び橋梁と直角方向の震動エネルギーを吸収することができ、耐久性及び優れた検査、メンテナンス性を有し、さらに設置や取り換えが容易にできる橋梁耐震構造を提供する。【解決手段】 橋桁を可動支承を介して橋脚で支持する橋梁の耐震構造であって、前記橋脚の橋軸方向の片方の壁部又は上部と、前記橋脚の上方の橋桁の下部又は側部との間に、橋軸方向と平行の角度から橋軸直角方向の角度の範囲で摩擦ダンパーを設けた橋梁耐震構造であり、前記摩擦ダンパーが、柱体の外面と筒体の内面が摺動して、一定の摩擦荷重を保持したまま軸方向に変位する機構を有することを特徴とする。【選択図】図１
ANTISEISMIC STRUCTURE FOR BRIDGE
橋梁耐震構造
KURAJI KENTARO (author) / ONISHI TAKANORI (author) / SATO TOSHIO (author) / HADA MASAYA (author) / NOBUOKA YASUHISA (author) / USHIJIMA SAKAE (author) / NAKAJIMA RYOICHI (author)
2015-12-10
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
ANTISEISMIC STRUCTURE AND ANTISEISMIC REINFORCEMENT METHOD
| European Patent Office | 2017