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A finite element numerical analysis was performed to understand how the axial strength of double back-to-back cold-formed steel angles is influenced by: loading condition (concentric and eccentric axial compression), boundary condition, global slenderness, geometric imperfections, cross-section thickness, and connection spacing. This paper also presents preliminary results on the behavior of the same built-up cross-section under high temperatures. The study shows that the nominal axial strength according to ABNT NBR 14762:2010 is conservative in most cases. The thermo-structural analysis revealed that according to the minimum fire resistance specified at ABNT NBR 14432:2001 all the built-up cross-sections analyzed need fire protection. The connection spacing (bolted connection with stitch plates in-between the angles) and the presence of a connection at mid-length alter the buckling mode and significantly increases the strength of the member. LEAL, D. F.; MUNAIAR NETO, J. Sobre perfis de aco formados a frio compostos por dupla cantoneira com secao “T” submetidos a compressao. Cadernos de Engenharia de Estruturas , v. 14, n. 62, p. 55-70, 2012. ISSN: 1809-5860.

Sobre perfis de aço formados a frio compostos por dupla cantoneira com seção "T" submetidos à compressão