冷弯薄壁槽钢截面柱局部与整体相关屈曲  

Interaction Behavior of Local and Overall Buckling in Thin-Walled Channel Columns

作　　者：郭彦林[1] 

机构地区：[1]西北工业大学

出　　处：《建筑结构学报》1992年第1期53-59,共7页Journal of Building Structures

基　　金：国家自然科学基金;青年基金

摘　　要：薄壁钢结构构件局部与整体稳定相关作用问题是一个相当复杂的研究课题,精确地分析必然要涉及到材料和几何非线性,给问题的解决增加了很大的难度。本文提出了一种有效的分析方法,把局部屈曲的薄壁压弯构件等效成若干个局部屈曲的小波段所组成的梁柱模型,通过建立短柱段超屈曲后的M-P-Φ曲线,用有限积分法获得压弯构件的相关屈曲承载能力。进行了冷弯槽钢截面柱的受压试验,试验与理论分析结果符合良好。This paper reports the interactive behavior of local and overall buckling in the cold-formed thin-walled channel columns with locally buckled component plates under eccentric loading. The column is first modelled as an assembly of a series of short sections, each being equal to the local buckling wavelength of the perfect column. Then M-P-φ curves of the short section in the post-buckling range can be calculated by using the nonlinear finite strip method developed by the author. Finally, a beam-column procedure with associated finite integration approach is used to estimate the ultimate load of the locally buckled column. A test program has been performed for cold-formed thin-walled channel column under compression resulting in good agreement between the experimental and theoretical results.

关 键 词：冷弯薄壁型 槽钢 截面柱 屈曲 试验 

分 类 号：TU392.1[建筑科学—结构工程]