摘要
新月型拱-悬臂梁组合体系桥作为近年来新出现的一种桥梁形式,相关的力学特性研究较少。以石棉大渡河大桥为工程背景,采用空间有限元软件对该类桥梁的第一类稳定问题以及受力性能进行研究,分析主副拱肋夹角、拱肋刚度、主梁刚度以及横向联系形式对新月型拱桥稳定系数以及结构内力和挠度的影响。研究结果表明:横向联系和主拱肋刚度是结构稳定性的控制因素,设计中可不考虑主副拱肋夹角对稳定性的影响;拱肋刚度是影响结构内力分配的重要因素。
Crescent arch-cantilever combination bridge is a new type of bridge,and the analysis about its mechanical properties is rare.Based on the Shimian Dadu River Bridge,the first kind stability and mechanical properties are studied in this paper by use of finite element software.The influence of the angle between main and side arch rib,the stiffness of arch rib and girder and the form of horizontal contact on first kind stability coefficient and internal force and deflection about crescent arch bridge were also analyzed.The results indicate that the form of horizontal contact and stiffness of main rib are the controlling factor of structural stability.The influence of the angle between main and side arch rib on stability can be neglected in designing.The stiffness of main and side arch rib are found to be the key factors in internal force distribution of the bridge.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2016年第6期1075-1082,共8页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(50978221)
关键词
新月型拱桥
结构稳定
拱肋夹角
受力性能
参数分析
crescent arch bridge
structural stability
angle between main and side arch rib
mechanical properties
parameter analysis
