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梁拱组合桥具有刚度大、材料节省等优点,近几年在铁路桥中相继得到了应用。对于大跨度连续梁拱桥,整体稳定始终是重点关注的问题,其中在荷载、横向联系等因素对稳定性影响方面的研究还不是很完善。该文采用有限元软件Midas/Civil建立某连续梁-拱桥的有限元模型,计算分析了该桥拱肋间横撑的形式对其稳定性的影响,同时还计算了在4种不同工况下结构的稳定系数,为同类型桥梁的设计和施工提供了经验和借鉴。
Beam arch bridge with stiffness, material saving, etc., in recent years in the railway bridge have been applied. For long-span continuous beam arch bridge, the overall stability is always a key issue, of which the research on the influence of load, horizontal link and other factors on the stability is still not perfect. In this paper, a finite element model of a continuous beam-arch bridge is established by using finite element software Midas / Civil. The influence of the form of bracing between the bridge and arch ribs on the stability is calculated and analyzed. In four different conditions The stability coefficient of the structure provides the experience and reference for the design and construction of the same kind of bridge.