双线铁路连续钢桁梁设计

Design of Double-Track Railway Continuous Steel Trussed Girder

在铁路桥梁中,连续桁架桥得到了越来越广泛的采用。结合某运煤专线双线栓焊下承式连续钢桁梁(48+3×64+48)m实例,介绍其主桁、桥面系及联结系等的构造形式,主桁杆件内力及疲劳验算所用的计算模型、计算结果,预拱度的设置,横向自振周期的计算,以及设计中须注意的事项。

The continuous truss bridge has been more and more widely adopted in railway bridges. In this paper, its structural form of main truss, deck system and fasten system, internal forces of main truss elements, calculation model and result for fatigue check, beforehand camber setting, and lateral natural vibration period calculating, are introduced referring to a double-track bolting ＆ welding through type continuous steel trussed girder （48 m ＋3×64 m ＋48 m） in a special railway line for transporting coal.