Flexural buckling resistance of rectangular welded box section columns

Application of high strength steel (HSS – S420 and higher grades) is growing nowadays in the civil engineering praxis due to numerous advantages compared normal (NSS S235-S355). The accurate consideration flexural buckling resistance HSS structures highly important design. Higher yield indicates applicability smaller cross-sections, which might be more sensitive for stability problems. purpose current study (1) investigate behaviour welded rectangular box section columns (2) propose a reliable column curve. Residual stress structural elements have significant influence on columns. This phenomenon causes that hot-rolled, cold-formed sections different resistance. Previous research results authors proved curves can used or NSS square Research continued extended investigation sections, significantly increase design proposals. resistances are determined by using deterministic numerical simulation technique wide range relative slenderness grades. Based proposed all analysed grades aspect ratios.