Verificação da segurança de um galpão industrial com estrutura de aço constituída por perfis formados a frio

Abstract

The breakthroughs on calculation procedures and the observation of accidents on structures makes periodically updating of structural project regulations necessary. With regard to the design of steel structures made up of cold formed profiles (CFS), a first Brazilian standard (NB 143) came into force in 1967, but has become an obsolete document due to inadequate disclosure and poor utilization. In 2001 a new published standard (NBR-14762) was updated nine years later. Prior to 2001, most of the sizing of such profiles are performed based on foreign standards. Therefore, an application of the criteria of the current NBR 14762 to structures that were designed before 2001 may be of interest to the technical environment, especially from the point of view of structural safety assessment. The objective of this Graduation Project was to perform a structural assignment on an industrial storage hangar in steel structure containing cold formed profiles (CFS), designed at the 90’s and located at São Carlos-SP. The building was designed based on foreign regulations, since at the time there was no brazilian regulation on CFS sizing. Furthermore, the previous version of NBR 8681 (1986) was in place. Thus, the main objective of this paper consisted in checking the structural elements of this hangar with today regulations criteria – NBR 14762 (2010) and NBR 8681 (2003), focusing on structural safety evaluations. Some profiles did not fit the NBR 14762 (2010) criteria, therefore they could not be used on hangar’s execution.