摘要
讨论国家规范GB50018-2002《冷弯薄壁型钢结构技术规范》"和欧盟规范EC3-1-3对冷弯薄壁型钢檩条承载能力的两种计算模式的差异:拉条和屋面板对檩条抗扭约束刚度及其整体稳定的重要影响,进行檩条畸变屈曲和翘曲应力的计算,评估工程实践中可滑动的卷边咬合式屋面板对檩条的抗扭约束刚度以及拉条的构造等对檩条的工况作用问题。对工程实践具有重要参考价值。
It is studied that the difference of cold-formed purlin structural calculation methods between the national code GB 50018--2002 Technical Code of Cold-Formed Thin-Wall Steel Structures and European code EC 3-- 1--3. Rotational spring stiffness of purlins given by roof sheets and anti-sag bars make an important effects on purlin buckling resistance. Torsional buckling and warping stress of purlin are calculated. Problem of the rotational spring stiffness between purlins and roof sheets with sliding seat and anti sag bar acting on purlins is considered. This paper may be as a reference for civil engineerings.
出处
《钢结构》
2009年第7期62-65,58,共5页
Steel Construction
关键词
蒙皮效应
局部屈曲
弯扭屈曲
畸变屈曲
扭转约束刚度
stressed skin
local buckling
flexural buckling
torsional buckling
rotational spring stiffness
