摘要
果子沟大桥为大跨度钢桁梁斜拉桥,桥塔为阶梯形钢筋混凝土结构,塔高分别为209.5 m和215.5 m,共设置4道横梁,构造复杂,塔柱与横梁异步施工难度大。为确保施工过程安全、合理,采用空间有限元法模拟桥塔施工阶段,计算分析塔柱的应力和位移。结果表明:塔柱各施工阶段预偏量设置合理;斜塔柱施工过程中2道临时横撑及在梁端加顶力减小了斜塔柱根部混凝土开裂的可能,保证塔柱与横梁异步施工过程中整体斜塔柱的线形、应力和稳定性满足设计与施工要求。
The Guozigou Bridge is a long span steel truss cable-stayed bridge.The pylons of the Bridge are of the stepped reinforced concrete structures,respectively 209.5 m and 215.5 m high and are provided with totally 4 cross beams.The pylons are structurally complicated and the asynchronous construction of the pylon columns and cross beams is difficult.To ensure that the construction process are safe and rational,the spatial finite element method is used to simulate the construction stages of the pylons and the st...
出处
《桥梁建设》
EI
CSCD
北大核心
2010年第2期69-72,共4页
Bridge Construction
基金
新疆维吾尔自治区交通厅项目-大跨度桥梁施工控制研究(43070136)
关键词
斜拉桥
钢筋混凝土结构
桥塔
横梁
异步施工
有限元法
位移
应力
cable-stayed bridge
reinforced concrete structure
pylon
cross beam
asynchronous construction
finite element method
displacement
stress
