摘要
提出一种圆角多边形孔蜂窝梁孔间腹板受剪屈曲承载力的分析方法。该孔型蜂窝梁具有与圆孔蜂窝梁相同的良好受力性能,但制作工艺简易且不损失扩展比。采用有限元方法研究了跨中集中力作用下蜂窝梁孔间腹板的屈曲模式和屈曲承载力。有限元分析考虑的参数包括孔间距与孔高之比和孔高与腹板厚之比等。并提出了改进的斜压柱理论模型以用于圆角多边形孔蜂窝梁孔间腹板的屈曲承载力计算。
An analytical method is presented for predicting the buckling strength of the web-post in a castellated steel beam with the newly proposed fillet corner openings. Castellated steel beams with the proposed opening shape have the same good structural performance as those having circular openings. However, they are simple and economical to manufacture and there is no loss in the expansion ratio. The buckling modes and buckling strength of the web-post were studied using the finite element method. The parameters studied included the ratio of the opening distance to the opening height, and the ratio of the opening height to the web thickness. A strut model is proposed to predicate the buckling strength of the web-post in a castellated steel beam with the new fillet corner openings.
出处
《工程力学》
EI
CSCD
北大核心
2015年第4期145-152,共8页
Engineering Mechanics
关键词
结构工程
蜂窝梁
圆角多边形孔
孔间腹板
局部屈曲
屈曲承载力
斜压柱理论
structural engineering
castellated steel beam
fillet corner web opening
web-post
local buckling
buckling strength
strut model
