摘要
韩家沱长江大桥主桥为(81+135+432+135+81)m双塔双索面钢桁梁半飘浮体系斜拉桥。主梁为平行弦钢桁梁,N形桁架,2片主桁,桁间距18m,桁高14m,节间长13.5m,采用正交异性板整体钢结构桥面,节点为焊接整体节点结构形式。桥塔为折线H形桥塔,采用C50混凝土,最大塔高187.5m。全桥共设56对镀锌高强钢丝斜拉索,呈平行的扇形双索面布置。在设计中通过在钢桁梁下弦杆底分段设置导流板经济有效地抑制了钢桁梁的涡激振动,研发了利用带控制开关的新型锁定装置控制列车制动力引起的结构振动、利用粘滞阻尼器控制地震响应的综合控制系统。
The main bridge of Hanjiatuo Changjiang River Bridge on Chongqing-Lichuan Rail- way is a semi-floating system steel truss girder cable-stayed bridge with double pylons, double ca- ble planes and with span arrangement （81 ＋ 135 ＋ 432 ＋ 135 ＋ 81） m. The main girder of the bridge is the N-shape steel truss girder with parallel chords and the girder is composed of two main trusses that are 18 m apart, 14 m high and 13.5 m long for an panel length. The deck of the bridge is the integral steel structure deck used with orthotropic steel plates and the panel points are the welded integral panel point structures. The pylons are the kinked H-shape pylons, 187. 5 m in maximum height and are constructed with C50 concrete. There are totally 56 pairs of high- strength galvanized steel wire stay cables for the whole bridge and the cables are arranged in par- allel fan shape and in double cable planes. In the design of the bridge, the vortex-excited vibra- tion of the steel truss girder has been economically and effectively suppressed through arrange- ment of the guide vanes in sections at the bottom of the lower chords and the new type of the lock device with control switch that can control the structural vibration due to train braking and the comprehensive control system of viscous dampers that can control the seismic response of the bridge have also been developed.
出处
《桥梁建设》
EI
CSCD
北大核心
2012年第6期63-67,共5页
Bridge Construction
基金
铁道部重大科研课题<大跨度桥梁建造关键技术研究--大跨度铁路斜拉桥建造关键技术研究>(2009G004-D)资助~~
关键词
斜拉桥
铁路桥
钢桁梁
整体节点
总体设计
cable-stayed bridge
railway bridge
steel truss girder
integral panel point
o- verall design
