According to feature of bolted and welded steel truss beam, the reasonable model simplified and calculating method is presented.
根据栓焊钢桁梁的结构特点，提出结构模型的简化计算图式的处理方法。
According to fatigue damage accumulation theory, test load of verified fatigue test on rail across beam and welded connections with integral joint of combined steel truss bridge was gotten.
依据疲劳损伤累积理论，确定了公轨两用钢桁桥轨道横梁与整体节点连接头验证性疲劳试验的试验荷载。
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