何青峰¹，申跃奎²，张  缨¹，汪  涛¹
    （1中煤西安设计工程有限责任公司，西安710054; 2西安建筑科技大学土木工程学院，西安710055）

[摘要] 结合一个端部悬挑的钢结构栈桥设计，进行了栈桥桁架结构不同布置方案比较、下弦水平支撑不同布置方案比较，找寻了最优结构方案。同时指出了一些不正确的认识，供结构设计人员参考。
[关键词] 栈桥；门架；支撑；檩条设计；风荷载

    Optimization design of a long-span coal-convey trestle with cantilever span
    He Qingfeng¹, Shen Yuekui², Zhang Ying¹, Wang Tao¹
    (1 China Coal Xi'an Designing&Engineering Co., Xi'an 710054, China; 2 Civil Engineering Department, Xi'an University of Architecture&Technology, Xi'an 710055, China)

Abstract: The paper focus on the comparison and optimization of a steel trestle structural scheme which was built with a cantilever end. Especially the choice of brace system and the plan of truss' web member were investigated. Meanwhile some misunderstanding concepts of steel structure were discussed, which can be consulted by the civil engineers.
Keywords: trestle; door-like frame; brace; purline design; wind load