Effect of uncertainty in localized imperfection on the ultimate compressive strength of cold-formed stainless steel hollow sections
PublisherMultidisciplinary Digital Publishing Institute
Rights accessOpen Access
Stainless steel has excellent corrosion resistance properties, considerable long-term durability, and good mechanical strength. Hollow sections are a versatile and efficient form for construction applications. The use of cold-formed stainless steel rectangular hollow section (RHS) and square hollow section (SHS) in construction industry grasps the attention of designers conceiving long-term, cost-effective structures. For cold-formed RHS and SHS, localized imperfection (ω) resulting from rolling and fabrication process is inevitable. ω has inherent variability and has no definitive characterization. In this paper, statistical analysis of the maximum value of ω collected from available experimental data is conducted. A new approach utilizing Fourier series to generate the three-dimensional (3D) models of members with random ω is proposed. Probabilistic studies based on the proposed 3D models are then carried out to evaluate the effect of uncertainty in ω on the ultimate compressive strength of stainless steel columns with cold-formed RHS and SHS. A total of 21 columns that are prone to local buckling reduction are studied. The results show that uncertainty in ω has a considerable influence on the columns with relatively higher cross-sectional slenderness.
CitationShen, Y.; Chacon, R. Effect of uncertainty in localized imperfection on the ultimate compressive strength of cold-formed stainless steel hollow sections. "Applied sciences", Setembre 2019, vol. 9, núm. 18, p. 3827-1-3827-15.