摘要
本文统一分析了轴心压杆三种常用截面的板件宽厚比限值。现行钢结构设计规范对H形截面和箱形截面采用两种不同准则,以致二者宽厚比限值的表达式存在质的区别。在综合运用两种准则并对板件间的约束作用细致分析的基础上,得出一系列实用的宽厚比限值的计算公式。此外,还对承载能力未用足的压杆,提出进一步放宽限值的系数。最后对两本国外新规范进行了评论。
This article presents a unified analysis of the limiting slenderness of plate elements of compression members with three commonly used sections. The current design code of steel structures assumes two different criteria for H-section and box section so that their expressions of limiting slenderness are substantially discrepant. Basing on synthetic use of the two criteria and elaborate analysis of the interactive restraint between plate elements, this article provides series of practical formulas of limiting slenderness. Besides, coefficient for further release of the limiting slenderness is suggested for members whose bearing capacity is not fully utilized. Finally, comments are made on two recent foreign design codes regarding the issue discussed here-in.
出处
《建筑钢结构进展》
2009年第5期1-7,共7页
Progress in Steel Building Structures
基金
陕西省教育厅重点实验室项目(05JS18)
关键词
压杆
板件
屈曲
宽厚比限值
约束系数
compression member
plate element, buckling limiting slenderness
restraining coefficient
