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贝雷桁片由于其结构设计比较合理。能较充分的发挥材料的性能。当钢材(16Mn)的许用应力[σ]=173MPa 时,单片的最大许用弯矩可达635kN·m。由贝雷桁片组成的简易龙门吊主梁具有结构较简单、实用,自重较轻,拆装也较容易等优点,因此在公路、桥
Berets due to its structural design more reasonable. Can more fully play the material’s performance. When the allowable stress [σ] of steel (16Mn) = 173MPa, the maximum allowable bending moment of single piece can reach 635kN · m. The simple gantry crane girder composed of beret truss has the advantages of simple structure, practicality, light weight and easier disassembly and assembly. Therefore, in the highway, bridge