有支架施工的钢管混凝土系杆拱桥吊杆张拉控制研究

The research on extend bars' tension control of steel pipe tied girder arch bridge with trestle construction

分析了钢管混凝土系杆拱桥在有支架施工状态下,张拉顺序及初张拉力的相互影响,给出了这一状态下吊杆初张拉力的计算方法;研究了拆除支架后此类桥型二次张拉吊杆顺序与二次张拉力大小的相互关系,及其对成桥索力的影响,给出了最佳张拉顺序及张拉力。

This paper analyzes the mutual influence of tensioning sequence and first tension to the steel pipe tied girder arch bridge during trestle construction,and provides the calculation method of suspender ＇s first tension in this status;researches the interrelation between the second tensioning sequence and the size of the second tension to this style of bridge after removing the trestle,and the effect to the cable ＇s strength of bridge completed,then gives out the best tensioning sequence and the strength of tension.