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。
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。
Calculation on baiting of truss of welded ball grid and setting of grid size are premises for assuring the quality of grid unity installation.
焊接球网架的施工杆件下料加工值的计算以及网架网格尺寸的定位是保证网架整体安装质量的主要前提条件。
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