大跨度连续梁拱组合桥梁吊杆应力分析

大跨度连续梁拱组合桥梁具有走行性好、方便维护、结构变形小、抗疲劳性能强等一系列优点，在我国公路桥梁建设中得到了广泛应用。以某公路大跨度连续梁拱组合桥梁为例，分析了桥梁吊杆的应力分布。首先介绍了大跨度连续梁拱组合桥梁的特点和研究现状，随后确定了局部模型的分析方法和边界的处理情况，最后建立了分析模型。利用ANSYS有限元法对该桥梁吊杆模型进行应力分析，得到了其应力分布情况，找出了运行中危险工况下的应力分布规律以及影响因素，提出了改进该桥梁结构的措施，可为大跨度连续梁拱组合桥梁设计提供有益的参考。

Boom Stress of Large Span Continuous Beam Arch Composite Bridge

Large span continuous beam arch composite bridge is with a series of advantages such as good direction, convenient maintenance, small structure deformation, strong anti-fatigue performance, and so on, which has been widely applied in the construction of highway bridges in China. Taking the large span continuous beam arch composite bridge of one highway as an example, the paper analyzes the stress distribution of the bridge boom. Firstly, the characteristics of large span continuous beam arch composite bridge and the research status are introduced. Then, the analysis method of part model and the boundary treatment are determined. Finally, the analysis model is established. Using ANSYS finite element method, it analyzes the stress for bridge boom model, obtains the stress distribution, finds out the regularities of stress distribution and influence factors of risk conditions in the operation, and puts forward the measures to improve the bridge structure. It provides the beneficial reference for the design of large span continuous beam arch composite bridge.