铁道标准设计2016，Vol.60Issue(5)：42-47,6.DOI:10.13238/j.issn.1004-2954.2016.05.010
铁路大跨度连续梁拱组合桥结构参数研究
Research on Design Parameters of Railway Long-span Continuous Beam and Arch Bridge
摘要
Abstract
In order to understand the impact of the structural design parameters on the stress characteristics of railway long-span continuous beam and arch bridge and to guide the future design of the similar bridges, the Guangyuan Jialing River Bridge on Lanzhou-Chongqing railway it referenced to study the impact of the ratio of rise to span, the arch axis shape and the arch beam stiffness ratio on the mechanical characteristics of the bridge. Analysis results indicate remarkable impact of the ratio of rise to span on the axial force of rib arch and the arch of the foot and the girder mid-span bending moment, and the value between 1/4 to 1/5 is more reasonable. When 1. 6 parabolic, 2. 4 parabolic and circular arc are taken as the arch axis, the arch foot section bending moment is too big and the second parabola and the catenary are more feasible to be taken as the arch axis of this kind of bridge. The arch beam stiffness ratio has little impact on the structure of the axial force, but more on arch rib bending moment. As the arch beam stiffness ratio increases, the bending moment of the arch rib is significantly improved.关键词
铁路桥/连续梁拱组合桥/矢跨比/拱轴线/拱梁刚度比Key words
Railway bridge/Continuous beam and arch bridge/Rise to span ratio/Arch axis shape/Arch beam stiffness ratio分类
交通工程引用本文复制引用
刘忠平,陈克坚,陈扬义..铁路大跨度连续梁拱组合桥结构参数研究[J].铁道标准设计,2016,60(5):42-47,6.基金项目
中国中铁股份有限公司科技研究开发计划课题(编号:引导-2014-16) （编号:引导-2014-16）
