摘要
本文研究了纯弯工字形薄壁钢梁组成板件局部屈曲与整体屈曲间的相互作用。先导出一种屈曲分析的复数有限条法,用以分析局部屈曲相关作用以及梁的可能屈曲模态,然后结合有效截面法研究了局部屈曲后梁的整体侧扭屈曲。最后,通过试验研究对理论方法进行了验证,并结合我国规范作了一些讨论。
This paper deals with the interaction of local and overall buckling in thin-walled steel I-beams under pure bending. A complex finile strip method of buckling analysis is first developed, and the interaction betuveen local buckling of composed plate elements as well as the buckling modes of the beam are analyzed by using this method. Then combined with effective sectcon method, the overall lateral buckling is studied, and through experiment, the theory is verified. Besides, some discussions on the related specification of China are carried out.
关键词
相关屈曲
钢结构
工字形
薄壁梁
thin-walled beam
complex finite strip
interactive buckling
effective section
