下承式系杆拱桥支架体系施工安全分析研究

Calculation and Analysis of Bracket System Construction Safety for Through Tied-Arch Bridge

以某支架体系施工钢箱梁系杆拱桥为例,借助有限元软件,对其各个施工阶段和成桥状态各种荷载组合下结构体系进行了详细静力和稳定性计算分析。结果表明:支架强度和稳定性均符合相关规范限值要求,整个桥梁施工过程是安全的。该支架体系施工方法可为同类桥梁施工提供参考。

Taking a steel box girder tied arch bridge constructed by a support system as an example,with the help of finite element software,detailed static and stability calculation and analysis of the structural system under various load combinations at various construction stages and bridge completion states are carried out.The results showed that bracket strength and stability are in line with the relevant specification limits,the whole bridge construction process is safe.The construction method of this support system can provide reference for the construction of similar bridges.