摘要
【目的】研究锈蚀冷弯薄壁型钢柱弹性整体屈曲性能。【方法】采用有限元特征值屈曲分析的方法,研究锈蚀部位、锈蚀区域长度和宽度对冷弯薄壁型钢柱弹性整体屈曲性能的影响,提出锈蚀冷弯薄壁型钢柱弹性整体屈曲应力计算方法,并对比分析理论计算结果与有限元特征值屈曲分析值。【结果】结果表明:随着锈蚀程度增大,弹性弯曲屈曲应力和弹性弯扭屈曲应力均逐渐下降;腹板锈蚀对弹性弯曲屈曲应力的影响大于翼缘锈蚀,而腹板锈蚀与翼缘锈蚀对弹性弯扭屈曲应力的影响接近。【结论】弹性弯曲屈曲应力随锈蚀区域长度增大逐渐下降,且下降速率呈减小趋势,而弹性弯扭屈曲应力随锈蚀区域长度增大近似线性下降;随着锈蚀区域宽度增大,弹性弯扭屈曲应力下降速率增大趋势大于弹性弯曲屈曲应力。
【Objective】The overall elastic buckling performance of corroded cold-formed thin-walled steel col-umns was investigated in this paper.【Method】The finite element eigenvalue buckling analysis method was used to study the effects of corrosion location,corrosion area length and width on the elastic overall buckling of cold-formed thin-walled steel columns.The calculation method for the elastic overall buckling stress of corroded cold-formed thin-walled steel columns was proposed,and the theoretical calculation results were compared with the fi-nite element eigenvalue buckling analysis values.【Result】The results show that as the degree of corrosion in-creased,the elastic bending buckling stress and the elastic bending torsional buckling stress gradually decreased.The effect of web corrosion on elastic bending buckling stress was greater than that of flange corrosion,while the effect of web corrosion and flange corrosion on elastic bending torsional buckling stress was similar.The elastic bending buckling stress gradually decreased with the increase of the corrosion area length,and the rate of de-crease showed a decreasing trend.However,the elastic bending torsional buckling stress approximately linearly decreased with the increase of the corrosion area length.【Conclusion】With the increase of the corrosion area width,the elastic bending torsional buckling stress decreased faster than the elastic bending buckling stress.
作者
聂彪
徐善华
陈华鹏
胡伟成
肖林发
Nie Biao;Xu Shanhua;Chen Huapeng;Hu Weicheng;Xiao Linfa(School of Transportation Engineering,East China Jiaotong University,Nanchang 330013,China;School of Civil Engineering,Xi'an University of Architecture&Technology,Xi'an 710055,China)
出处
《华东交通大学学报》
2024年第3期10-19,共10页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(52308313,52208168)
江西省自然科学基金项目(20224BAB214067)
中国博士后科学基金资助项目(2023M741161)
江西省重点研发计划项目(20223BBH80002)。
关键词
锈蚀
冷弯薄壁型钢
整体屈曲
有限元分析
弹性
corrosion
cold-formed thin-walled steel
overall buckling
finite element analysis
elastic
