Community Research and Development Information Service - CORDIS


Traditionally, the fire resistance of load-bearing structures is assessed by considering the behaviour of single structural components, rather than considering the behaviour of the whole structure. Strongly schematised, standard fire conditions are also taken into account. This approach is quite conservative for modern steel-framed structures, as experience in real fires shows. Recent large-scale fire tests, in particular those carried out in the scope of the Cardington project (CARD(1)), confirm this.

In the scope of the present project (CARD(2)), the conditions under which the floor beams can remain unprotected are reviewed more precisely. To this end, numerical design tools - suitable for the structural fire safety design of buildings on the type investigated in the CARD(1) project - have been selected/ further developed. These tools have been used to undertake a parametric study into the effect of the factors influencing the structural behaviour under natural fire exposure. The outcomes have been generalised where possible.

From the above analysis, it follows that the most important parameters are the fire load density and the so-called opening factor. Other investigated parameters are:
- mechanical loading
- amount of reinforcement
- choice of structural grid system
- type of concrete

Additional information

Authors: TWILT L, TNO Building and Construction Research, Delft (NL);BOTH C, TNO Building and Construction Research, Delft (NL);BREUNESE A J, TNO Building and Construction Research, Delft (NL);O'CALAGHAN D, Corus UK, Rotherham (UK);O'CONNOR M, Corus UK, Rotherham (UK);ROTTER M, University of Edinburgh, Edinburgh (UK);USMANI A, University of Edinburgh, Edinburgh (UK);CAJOT G L, ProfilArbed, Esch-sur-Alzette (LU);ZHAO B, CTICM, Saint-Remy-les-Chevreuse (FR), The Steel Construction Institute, Berkshire (UK);NEWMAN G M,
Bibliographic Reference: EUR 20953 EN (2004), 240 pp. Euro: 35
Availability: EUR-OP reference: KI-NA-20953-EN-S Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-0749-2
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