... 板箱梁slab box beam 主梁截面girder section 中等(30～50米)的主跨跨径范围medium range of main span ...
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welding box-section crane girder 焊接箱形吊车梁
The girder is square in cross-section.
这个大梁的截面是方形的。
Following the process of construction, considering the worst loads, according to the assumption of plane section, the steel girder alone and the composite girder are computed respectively.
按照实际施工过程，考虑最不利计算荷载，根据平截面假定，分别对钢梁单独受力和钢-混凝土组合梁两种工况进行计算。
The structure features of bearing column girder transfer floor such as large section and complicated mechanical behaviors are introduced, which realize the transfer of structural axes.
介绍了托柱梁式转换层结构实现了上下层结构柱网改变、截面大、结构受力复杂等结构形式特点；
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