大跨度上承式钢管混凝土拱桥设计研究

研究目的:大跨度上承式钢管混凝土拱桥,结构受力复杂.结构形式和施工方法的选择对拱肋受力、桥上无缝线路设计、列车行车安全性和平稳性有较大的影响.因此,本文对此进行研究探讨.研究结论:上承式拱桥是跨越山区河流、深谷的合理桥式.通过对某线黄河特大桥上承式钢管混凝土拱桥的设计研究,得出如下结论:(1)拱肋截面形式、拱肋横倾角及拱上建筑主梁跨度、支墩顶支座布置方式等有关设计参数对无缝线路、车线桥动力性能影响的计算研究结果;(2)拱肋矢跨比及拱轴系数、钢管拱架设方案、管内混凝土灌注顺序选对拱肋应力影响的研究结果;(3)形成了一整套上承式铁路拱桥设计研究的新思路、新方法.

Research on the Design of Large Span Deck Steel Tube Concrete Arch Bridge

Research purposes: Large span deck steel tube concrete arch bridge is very complicated in the stresses structure.The selection of structure type and construction method has great effects on the arch rib force,the design of jointless track on the bridge,the safety and stability of the train.The issues mentioned above are studied in this paper.Research conclusions:The deck arch bridge is suitable for crossing the mountain river and deep valley.Based on studying the design of deck steel tube concrete arch brid...