[en] Structural elements of building have to meet a multitude of requirements. Besides the static load bearing capacity, common
requirements are the structural integrity and efficiency during the construction stage and sufficient fire resistance. Within the French
CIFRE research project COMINO, an innovative type of composite beam was developed for buildings beams with a span of 6 -12m,
which need fire resistance until 2 hours with no additional supports at construction stage.
The developed solution is composed of a steel U-section acting as a formwork in construction stage for a reinforced concrete part
that provides the fire resistance. In the exploitation stage, the steel and the reinforced concrete are acting together as a composite
beam. In construction stage, when the concrete is not hardened and thus the stabilizing effect is not present, the steel beam, is subjected
to Lateral-Torsional Buckling. In order to investigate the structural behaviour of the new developed steel section in construction stage,
a single full-scale test has been carried out at the Laboratory of Structural Engineering of the University of Luxembourg. This article
focuses on the stability of the steel beam made of thin-walled steel parts without considering any stabilizing effect. The test results
are then compared to the results of numerical investigations and to the analytical solutions of EN 1993.
Disciplines :
Civil engineering
Author, co-author :
Turetta, Maxime; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering
Odenbreit, Christoph ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)
Khelil, Abdelouahab; Université de Lorraine
Martin, Pierre-Olivier; CTICM – Centre Technique Industriel de la Construction Métallique
External co-authors :
yes
Language :
English
Title :
Investigations on the lateral-torsional buckling of an innovative U-shaped steel beam in construction stage of composite beam
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