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  • Practical design tools for composite steel-concrete construction elements submitted to ISO-fire considering the interaction between axial load N and bending moment M


The thermo-mechanical laws describing the behaviour of steel and concrete at various temperatures are presented and discussed. These stress-strain relationships have been adapted slightly in order to improve the simulation of all boundary conditions. The adaptation concerning heat exchange, particularly the convection factor and the relative resultant emissivity used in CEFICOSS calculations, is described. The selection of material qualities has been limited to four basic possible combinations, because it could be shown that any other combination with intermediate qualities of structural steel and concrete is covered by a very simple interaction method. Four different cross-section types of composite columns were analysed under ISO-fire conditions, starting with a constant first order eccentricity. The different fire resistance classes, ultimate bending moments and shear forces of three types of composite beams are presented.

Additional information

Authors: ARBED RECHERCHES, ARBED Recherches, Esch/Alzette (LU)
Bibliographic Reference: EUR 13309 EN (1991) Parts I, II, III, 330 pp., FS, ECU 30
Availability: (2)
ISBN: ISBN 92-826-2398-X
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