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为了改变工业厂房“重盖”、“肥梁”的落后局面,我们将弯曲薄壁型钢屋架应用到了实际工程中去。弯曲薄壁型钢屋架跟同跨度的普通钢屋架相比,可节约钢材2.3倍,跟同跨度的预应力混凝土屋架相比,虽然钢材近乎相等,但节省了大量水泥、木材,而且制造、安装也较为简便。现将试验结果及计算实例介绍如下。一、試驗結果原设计杆件全部为闭口截面,仅在钢板軋制成型后留有一条焊縫,后因上弦杆仅能供应的材料是二个槽钢焊拼,而且两侧还各少20毫米,这样只能将设计修改成为两侧各加一条50毫米宽的钢板焊贴上去,为了减少材料规格,
In order to change the backwardness of “heavy cover” and “fat beam” of industrial plants, we applied the curved thin-walled steel roof truss to the actual project. Curved thin-walled steel truss can save 2.3 times more steel than conventional steel truss with same span, compared with spanned prestressed concrete truss, although the steel is nearly equal, it saves a lot of cement and timber, and the manufacture and installation More convenient. Now the test results and calculation examples are as follows. First, the test results of the original design of the rod all closed cross-section, only after the rolling plate forming a weld left after the rod can only supply the material is two channel welding, but also less on both sides 20 mm, this can only be modified on both sides of the design to add a 50 mm wide steel plate paste up, in order to reduce material specifications,