采用MIDAS/Civil软件系统,以某跨度为96m的刚性系杆拱桥为例,分两种工况研究了该桥在恒载和恒载+活载作用下拱肋倾角变化对该体系桥梁受力性能的影响。研究结果表明:拱肋倾角变化对其自身变形、应力等受力性能影响较大,对结构动力特性及稳定性影响也较大,对系梁影响相对较小;研究表明:在跨度100m左右的刚性系杆拱桥中,设计时的拱肋倾角取值与施工过程中拱肋倾角偏差值应该控制在-3°～2°。研究结果可为同类型的桥梁设计与施工提供参考。 Using MIDAS / Civil software system, taking a certain length of 96m rigid tied arch bridge as an example, this paper studies the change of arch inclination under the condition of constant load, constant load and live load under two kinds of working conditions, The impact of performance. The results show that: the change of arch inclination has a great influence on its own deformation, stress and other mechanical properties, and has a great influence on the dynamic characteristics and stability of the structure, and has a relatively small influence on the tie beam. Studies have shown that at a span of 100m Rigid tied arch bridge, the design of arch rib inclination value and the construction process of arch rib inclination deviation should be controlled at -3 ° ~ 2 °. The research results can provide references for the same type of bridge design and construction.