摘要
对美国土木工程师协会ASCE《输电铁塔设计导则》(简称《美国导则》)与中国的《架空送电线路杆塔结构设计技术规定》(DL/T5154—2002)中热轧角钢宽厚比限值进行了探讨,并且比较了角钢局部屈曲失稳问题的不同方法得到的强度折减系数。通过六组不同长细比的等边角钢轴心受压试验,结果表明现行杆塔结构设计中采用DL/T5154—2002标准计算方法得到的等边角钢强度折减系数是偏保守的。在借助有限元分析结果并结合我国的《钢结构设计规定》(GB50017—2003)和《美国导则》的基础上,对《架空送电线路杆塔结构设计技术规定》中等边角钢的强度折减系数提出了修正建议。
The limit value for the width-to-thickness ratio of the hot-rolled equilateral angle steel member from 'Guide for design of transmission tower' by American Society of Civil Engineers and 'Technical Regulation of design for tower and pole structure of overhead transmission line' (DL/T5154-2002) in China is discussed. And the different method of dealing with local buckling instability of single angle columns is compared. With six group axial compressed test of different slenderness ratio, it is found that the current structural design standards DL/T5154-2002 used in the calculation of high-strength steel stability is conservative. According to finite element method(FEM), the strength subtraction coefficient under axial compression in DL/T5154-2002 is amended.
出处
《重庆大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2010年第1期94-98,共5页
Journal of Chongqing University
基金
国家自然科学基金资助项目(50678181)
重庆大学'211工程'三期创新人才培养计划建设项目(S09105)
关键词
Q460钢
强度折减系数
宽厚比
稳定系数
局部屈曲
Q460 steel
intensity subtraction coefficient
the ratio of width to its thickness
stability coefficient
local buckling