摘要
基于薄板的弹塑性大挠度有限元理论和弧长法,综合考虑了各种缺陷的影响,分别研究了梁的长细比、翼缘宽厚比和截面边长比对梁的稳定性的影响。最后在考虑了高强钢薄壁箱形截面梁的局部和整体的相关屈曲的基础上,提出了以翼缘宽厚比和截面边长比为参数的高强钢薄壁箱形截面梁的极限承载能力计算公式,并证实了公式的有效性。为有关高强度薄壁箱形截面梁的稳定性设计提供参考。
Basing on elasto-plasticity large deflection finite element theory of the thin-walled steel plate,all kinds of imperfections were considered.The parameters that included the slenderness ratio,the width-thickness ratio of flange and the section side ratio were studied. Considering the relative buckling of the local and overall of the beam,the ultimate load-carrying calculation expression is put forward,which takes the widththickness ratio of flange and the section side ratio as the parameters.The effectiveness of the expression is verified.The results can provide reference for the design of the thin-walled box-section beam of high-strength steel.
作者
程剑锋
胡裕祥
马铁刚
Gao Lei,Sun Hongcai,Xu Guanyao,Qi Liang（1 Engineering Institute of Engineering Corps,PLAUST,Nanjing 210007,China;2 No.2 Institute of Engineer Corps,General Equipment Headquarters,Beijing 100093,China）
出处
《铁道通信信号》
2010年第6期13-16,共4页
Railway Signalling & Communication
关键词
箱形梁
稳定系数
高强钢
薄壁箱形截面
相关屈曲
box beam
stability factor
thin-walled box-section beam
high-strength steel
relative buckling
