Flexural buckling resistance of cold-formed HSS hollow section members

摘要

The application range of the current EN 1993-1-1 [1] for column buckling resistance determination is limited for steel materials up to the steel grade of 5460. The EN 1993-1-12 [2] gives design rules for materials up to steel grade of 5700. The stability failure of HSS steel structures is very important in the design, because due to the higher yield strength smaller cross sections can be used, which might be more sensitive tor stability failure. According to the previous research results, the global budding behavior of HSS and NSS columns can be significantly different, however these differences are not considered in the Eurocode based design process. The purpose of the current research is to study the column buckling behavior of HSS cold-formed hollow section columns based on previous and current experimental investigations and based on numerical simulations. This paper focuses on the effect of the different material properties, imperfections and residual stresses on the global buckling behavior of HSS members and to give design proposals for the applicable column budding curves for steel grades between (S420) 5500 and 5960. (C) 2016 Elsevier Ltd. All rights reserved.