Buckling response of ferritic stainless steel columns at elevated temperatures

摘要

This paper presents a numerical study on the buckling behaviour of ferritic stainless steel columnsrnin fire. Finite element models were developed and validated against existing test results to predict the elevatedrntemperature non-linear response of ferritic stainless steel columns. A total of nine austenitic and three ferriticrnstainless steel column tests were replicated using the finite element analysis package ABAQUS. Parametricrnstudies were performed to investigate the effects of variation of load level and global slenderness on the elevatedrntemperature buckling response of ferritic stainless steel columns, and to extend the range of structural performancerndata. Both the experimental and numerical parametric study resultswere compared with the current designrnrules in EN 1993-1-2 (2005) and recent proposed modifications thereof by Ng and Gardner (2007), Uppfeldt etrnal. (2008) and Lopes et al. (2010).