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Layered suspension structure of single-side double-main-cable steel truss stiffening girder suspension bridge
The invention discloses a layered suspension structure of a single-side double-main-cable steel truss stiffening girder suspension bridge. A main cable close to the inner side of a bridge deck is connected to an upper chord of a steel truss stiffening girder through a cable clamp and a sling, and a main cable close to the outer side of the bridge deck is connected to a bracket extending out of a lower chord of the steel truss stiffening girder through a cable clamp and a sling. The single-side double main cables are arranged at different heights with one cable arranged at the upper part, and the other main cable arranged at the lower part, or the inner side main cable and the outer side main cable are arranged in parallel at the same height, or the inner side main cable and the outer sidemain cable are arranged in a double-chain manner. The bridge deck width occupied by the main cable suspension area can be reduced, so that the dead load of the stiffening girder is reduced, and the transverse width of the bridge tower is also reduced. The problem that the lifting point force is excessively concentrated on the upper (or lower) layer node can be effectively reduced by layered suspension. The inner and outer slings are different in length, so that same-frequency resonance of the slings can be avoided. The heights of the inner and outer main cables are different, so that cable vibration caused by wake flow can be avoided. If the double main cables are arranged in a double-chain form, the S-shaped deflection of the stiffening girder can be reduced.
本发明公开了一种单侧双主缆钢桁架加劲梁悬索桥的分层悬吊结构，靠桥面内侧的主缆通过索夹和吊索连接到钢桁架加劲梁的上弦，靠桥面外侧的主缆通过索夹和吊索连接到钢桁架加劲梁下弦伸出的牛腿。单侧双主缆采用一根主缆在上、另一根主缆在下的不等高布置，或采用内侧和外侧主缆平行等高布置，或采用内侧和外侧主缆双链布置。本发明可减少主缆悬吊区占用的桥面宽度，从而减轻加劲梁恒载，也减小桥塔的横向宽度。分层悬吊还能有效降低吊点力过于集中于上(或下)层节点的问题。内外侧吊索长度不一样，可避免吊索同频率共振。内外侧主缆高度不一样，可避免尾流引起的缆索振动。双主缆如果布置成双链形式，还可以减少加劲梁的S型挠度。
Layered suspension structure of single-side double-main-cable steel truss stiffening girder suspension bridge
The invention discloses a layered suspension structure of a single-side double-main-cable steel truss stiffening girder suspension bridge. A main cable close to the inner side of a bridge deck is connected to an upper chord of a steel truss stiffening girder through a cable clamp and a sling, and a main cable close to the outer side of the bridge deck is connected to a bracket extending out of a lower chord of the steel truss stiffening girder through a cable clamp and a sling. The single-side double main cables are arranged at different heights with one cable arranged at the upper part, and the other main cable arranged at the lower part, or the inner side main cable and the outer side main cable are arranged in parallel at the same height, or the inner side main cable and the outer sidemain cable are arranged in a double-chain manner. The bridge deck width occupied by the main cable suspension area can be reduced, so that the dead load of the stiffening girder is reduced, and the transverse width of the bridge tower is also reduced. The problem that the lifting point force is excessively concentrated on the upper (or lower) layer node can be effectively reduced by layered suspension. The inner and outer slings are different in length, so that same-frequency resonance of the slings can be avoided. The heights of the inner and outer main cables are different, so that cable vibration caused by wake flow can be avoided. If the double main cables are arranged in a double-chain form, the S-shaped deflection of the stiffening girder can be reduced.
本发明公开了一种单侧双主缆钢桁架加劲梁悬索桥的分层悬吊结构，靠桥面内侧的主缆通过索夹和吊索连接到钢桁架加劲梁的上弦，靠桥面外侧的主缆通过索夹和吊索连接到钢桁架加劲梁下弦伸出的牛腿。单侧双主缆采用一根主缆在上、另一根主缆在下的不等高布置，或采用内侧和外侧主缆平行等高布置，或采用内侧和外侧主缆双链布置。本发明可减少主缆悬吊区占用的桥面宽度，从而减轻加劲梁恒载，也减小桥塔的横向宽度。分层悬吊还能有效降低吊点力过于集中于上(或下)层节点的问题。内外侧吊索长度不一样，可避免吊索同频率共振。内外侧主缆高度不一样，可避免尾流引起的缆索振动。双主缆如果布置成双链形式，还可以减少加劲梁的S型挠度。
Layered suspension structure of single-side double-main-cable steel truss stiffening girder suspension bridge
一种单侧双主缆钢桁架加劲梁悬索桥的分层悬吊结构
SHEN RUILI (author) / CHEN WEI (author) / YAN YONG (author) / MIAO RUSONG (author) / XUE SONGLING (author)
2020-07-17
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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