Fire design methods for slim‐floor structures

Slim-floor beams are well-known, sustainable and economical solutions for residential, commercial and industrial buildings. However, despite their widespread use, Eurocode 4 contains no specific simplified calculation methods for the fire resistance of integrated and shallow floor beams. There is a clear need for an improved understanding of the performance of structures in fire plus clear and cost-effective design guidance. This paper presents a set of simplified rules for determining thermal fields in the lower flange, web, rebars and slab of slim or integrated floor beams. This calculation methodology is based on existing formulas taken from different parts of Eurocode 4 except for the temperature calculation in the lower flange, which is deduced from a parametrical study using the SAFIR software.

[1]  Colin Bailey.  The behaviour of asymmetric slim floor steel beams in fire , 1999 .

[2]  Jean-Marc Franssen,et al.  Sécurite incendie - Sécurité incendie et calcul de la résistance au feu des bâtiments en acier selon l'Eurocode 3 , 2012 .

[3]  Jean-Marc Franssen,et al.  Simplified Fire Design for Slim Floor Beams , 2011 .

[4]  Ehab Ellobody.  Nonlinear behaviour of unprotected composite slim floor steel beams exposed to different fire conditions , 2011 .

[5]  Ulf Wickström,et al.  Comments on calculation of temperature in fire-exposed bare steel structures in prEN 1993-1-2: Eurocode 3—design of steel structures—Part 1–2: general rules—structural fire design , 2005 .

[6]  Renata Obiala,et al.  CoSFB – Design and Application of a New Generation of Slim-Floor Construction , 2014 .

[7]  Jean-Marc Franssen,et al.  Simple equations for the calculation of the temperature within the cross-section of slim floor beams under ISO Fire , 2012 .

[8]  G. M. Newman.  Fire resistance of slim floor beams , 1995 .

[9]  Ali Nadjai,et al.  Structural Performance of Slim Beam Floor System in Fire , 2011 .

[10]  Chrysanthos Maraveas.  NUMERICAL ANALYSIS OF DELTA COMPOSITE BEAMS IN FIRE , 2014 .

[11]  Zhongcheng Ma,et al.  Behavior of Composite Slim Floor Structures in Fire , 2000 .

[12]  Walter Borgogno.  Tragverhalten von Betonhohlplatten bei nachgiebiger Auflagerung , 1997 .

[13]  Zhongcheng Ma,et al.  Fire resistance of composite slim floor beams , 2000 .

[14]  Jean-Marc Franssen,et al.  Simplified design method for slim floor beams exposed to fire , 2012 .

[15]  Wei Sha,et al.  Intumescent fire protection coating thickness for shallow floor beams , 2002 .