Brazilian standards for steel structures fire design

On the behaviour of single-span steel beams under uniform heating

“…Exposure of materials to thermal action causes degradation of physical and chemical properties, reduction of strength and modulus of elasticity and produces additional loads on statically indeterminate structures. Fire situation is considered an accidental action as ABNT NBR 14323 (1999) (Silva and Fakury, 2002) and Eurocode 0 (2001). For this reason, the design actions have lower values than those normally adopted at room temperature.…”

Sensitivity Study on Using Different Formulae for Calculating the Temperature of Insulated Steel Members in Natural Fires

“…The emissivity of a real surface is a function of the surface temperature [20], but in current codes [1][2][3][4], constant values of emissivity are adopted. The Neumann boundary condition at the fire-insulation interface is complex.…”

“…In order to undertake such an assessment it may be necessary to determine the temperature of steel members, with and without fire protection, when subject to real fire exposure. * Correspondence should be addressed to: Chao Zhang, E-mail: 08_chao_zhang@tongji.edu.cn Fire codes [1][2][3][4] in different countries provide various formulae for calculating the temperature of insulated steel members in fire. Those formulae are developed by solving a simplified 1D condensed heat transfer model [5], as shown in Figure 1.…”

“…This paper intends to investigate the capacity of using the formula recommended by CECS200 [3], as well the formulae recommended by fire codes in other countries [1,2,4], for calculating the temperature of insulated steel members in natural fires. The most widely referenced 'Swedish' fire curves [11], the measured average compartment temperature time curves in BRE full-scale tests at Cardington [12], the recorded average atmosphere temperature time curves in Cardington 8 story real building fire tests [13], and the measured average compartment temperature time curve in Dalmarnock fire test one [14] are used to represent different natural fire environments.…”

Incêndio real em um apartamento de interesse social: um estudo de caso

“…A união entre esses elementos é executada por meio de solda de filete em toda a volta do perfil da viga e há nervuras horizontais, internas aos pilares, no nível de cada mesa das vigas. A análise estrutural foi feita usando o programa computacional comercial SAP 2000 (13) , para a combinação excepcional de ações recomendada pela NBR 14323 (11), (14) (equação 1).…”