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A platform for research: civil engineering, architecture and urbanism
BRIDGE FALL PREVENTION DEVICE OF TRUSS BRIDGE
PROBLEM TO BE SOLVED: To provide a bridge fall prevention device which can prevent a bridge fall of a truss bridge even if a girder member in the vicinity of a center of an upper structure of the truss bridge is damaged.SOLUTION: In a bridge fall prevention device of a truss bridge having an upper structure 2 which connects both ends of a columnar girder member into a triangular shape together with the other member, and is constituted by repeating the connection, and a pair of lower structures 3 which support both ends of the upper structure 2, the bridge fall prevention device comprises at least one piece of a cable 5 at each of both sides of the upper structure 2 in a width direction, and has guide parts 21a for slidably inserting the cable 5 into side faces of a plurality of the girder members. The cable 5 is inserted into the guide parts 21a, and both ends of the cable 5 are fixed to a pair of the lower structures 3, respectively. The cable 5 is in a loosened state at normal vibration which is generated by the movement of an active load, and when the girder members are broken and the upper structure is deformed, the cable is strained, and prevents the collapse of the upper structure.SELECTED DRAWING: Figure 1
【課題】トラス橋の上部構造の中央付近の桁部材が損傷した場合でも、トラス橋の落橋を防止できる落橋防止装置を提供すること。【解決手段】柱状の桁部材の両端を他の桁部材と三角形に繋いだ構造でありそれを繰り返して構成された上部構造２と、上部構造２の両端を支える一対の下部構造３を有するトラス橋の落橋防止装置において、上部構造２の幅員方向の両サイドに各々少なくとも１本のケーブルを５有すること、複数の桁部材の側面に、ケーブル５を摺動可能に挿通するガイド部２１ａを有すること、ケーブル５はガイド部２１ａに挿通され、ケーブル５の両端は一対の下部構造３の各々に固定されていること、ケーブル５は、活荷重の移動により生じる通常振動時には、弛んだ状態にあり、桁部材が破損して上部構造が変形した時に、緊張して前記上部構造の崩落を防止する。【選択図】図１
BRIDGE FALL PREVENTION DEVICE OF TRUSS BRIDGE
PROBLEM TO BE SOLVED: To provide a bridge fall prevention device which can prevent a bridge fall of a truss bridge even if a girder member in the vicinity of a center of an upper structure of the truss bridge is damaged.SOLUTION: In a bridge fall prevention device of a truss bridge having an upper structure 2 which connects both ends of a columnar girder member into a triangular shape together with the other member, and is constituted by repeating the connection, and a pair of lower structures 3 which support both ends of the upper structure 2, the bridge fall prevention device comprises at least one piece of a cable 5 at each of both sides of the upper structure 2 in a width direction, and has guide parts 21a for slidably inserting the cable 5 into side faces of a plurality of the girder members. The cable 5 is inserted into the guide parts 21a, and both ends of the cable 5 are fixed to a pair of the lower structures 3, respectively. The cable 5 is in a loosened state at normal vibration which is generated by the movement of an active load, and when the girder members are broken and the upper structure is deformed, the cable is strained, and prevents the collapse of the upper structure.SELECTED DRAWING: Figure 1
【課題】トラス橋の上部構造の中央付近の桁部材が損傷した場合でも、トラス橋の落橋を防止できる落橋防止装置を提供すること。【解決手段】柱状の桁部材の両端を他の桁部材と三角形に繋いだ構造でありそれを繰り返して構成された上部構造２と、上部構造２の両端を支える一対の下部構造３を有するトラス橋の落橋防止装置において、上部構造２の幅員方向の両サイドに各々少なくとも１本のケーブルを５有すること、複数の桁部材の側面に、ケーブル５を摺動可能に挿通するガイド部２１ａを有すること、ケーブル５はガイド部２１ａに挿通され、ケーブル５の両端は一対の下部構造３の各々に固定されていること、ケーブル５は、活荷重の移動により生じる通常振動時には、弛んだ状態にあり、桁部材が破損して上部構造が変形した時に、緊張して前記上部構造の崩落を防止する。【選択図】図１
BRIDGE FALL PREVENTION DEVICE OF TRUSS BRIDGE
トラス橋の落橋防止装置
GOTO YOSHIAKI (author) / YAMADA TADANOBU (author)
2017-03-23
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken