摘要
本文建立了大挠度弹塑性有限条法,用以分析冷弯薄壁单轴对称开口截面短柱段局部屈曲后相关作用,得出了一系列对于工程设计有价值的结论。进行了12根槽钢截面短柱段受压试验。通过与前人对单块板的分析及本文试验值的比较,证明本文提出的大挠度弹塑性有限条法具有相当高的精度。
The elastoplastic large deflection finite strip method is set up to compute the interaction behaviour of initially locally buckled and eccentrically loaded cold-formed thin-walled channel sections. A lot of results which are valuable. for engineering design are obtained. The ultimate loads of the sections are determined by use of an area approach associated with a modified Ilyushin or ivanov yield criterion and the Prandtl-Reuss flow rules. A test program of 12 channels is performed and moire fringe technique is used to obtain fringe patterns of buckled plates in the sections. In comparison with available theoretical and experimental results, the finite strip method gives extremely accurate results in elastoplastic large deflection analysis of the sections.
出处
《土木工程学报》
EI
CSCD
北大核心
1990年第3期36-46,共11页
China Civil Engineering Journal
基金
国家自然科学基金
青年基金
