摘要
该文针对压弯作用下闭合截面圆弧拱的平面外弹性屈曲性能及稳定设计方法进行研究。首先通过势能驻值原理分析均匀轴压力和弯矩同时作用下,钢拱的平面外弹性屈曲性能。在此基础上,在弹塑性范围内讨论弯矩对钢拱的平面外稳定削弱作用,推导得到考虑弯矩作用的压弯钢拱正则化长细比,进而将压弯钢拱的平面外稳定问题简化为纯压钢拱的稳定问题。该文提出的压弯钢拱平面外稳定设计方法与数值分析计算结果吻合较好,可用于钢拱的平面外稳定承载力设计。
This paper is concerned with the out-of-plane stability and design of close-section arches under compression and bending. Firstly, the out-of-plane elastic buckling loads of arches under uniformly-distributed compression and bending are studied by a potential energy principle. After that, the moment of cross-section is considered as the decrease effect on the out-of-plane inelastic stability of arches, and a normalized slenderness considered the decrease effect is proposed. Based on the results proposed, the out-of-plane inelastic design of arches under compression and bending is simplified into inelastic design of compressed arches. The out-of-plane design method agrees well with finite element results. Thusly, it could be used to design the out-of-plane inelastic stability of steel arches.
出处
《工程力学》
EI
CSCD
北大核心
2016年第10期62-67,共6页
Engineering Mechanics
基金
中国博士后科学基金面上项目(2015M582449)
关键词
钢拱
平面外
稳定
闭合截面
弹塑性
设计方法
steel arches
out-of-plane
stability
close-section
inelastic
design method
