吊杆张拉顺序对系杆拱桥系梁和拱肋受力影响分析

Analysis of Influence of Suspender Tension Sequence on the Forces on the Tie Beam and Arch Rib of Tied Arch Bridge

为确定施工过程中吊杆张拉顺序对系梁和拱肋受力的影响,以某128m系杆拱桥为工程背景,采用Midas软件建立有限元模型,用桥梁模型模拟吊杆张拉过程,对系杆拱桥特定位置的应力和内力进行对比分析,得到最优张拉顺序.结果表明:采用不同的张拉顺序,对结构的受力产生一定影响,系梁和拱肋在受力方面不能同时达到最优,应根据实际工程选择合理顺序.

In order to determine the influence of Suspender Tension Sequence on tied beam and arch rib forces during construction,a 128-meter tied arch bridge as an engineering background is taken for analysis.Midas software is used to establish finite element model,bridge model is used to simulate the process of suspender tension to carry out comparative analysis of stress and internal force at specific locations of tied arch bridge,so as to obtain the optimal tension sequence.The results show that different tension sequence has a certain effect on the structure stress,and tied beams and arch ribs cannot achieve the optimal stress at the same time.The reasonable sequence should be selected according to the actual project.