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Analysis of the Thermo-Mechanical Behaviour of Steel-to-Timber Connections in Bending

1 CSTB, 84 avenue Jean Jaurès, 77447 Marne-la-Vallée Cedex 2, France
2 Ecole Nationale d'Ingénieur de Saint-Etienne, Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), Université de Lyon, UMR 5513, 58 rue Jean Parot, 42023 Saint-Etienne, Cedex 2, France
3 Université Blaise Pascal, Institut Pascal, Clermont Université, BP 10448, F-63000 Clermont-Ferrand. CNRS, UMR 6602, Institut Pascal, F-63171 Aubière, France

Journal of Structural Fire Engineering

ISSN: 2040-2317

Article publication date: 17 June 2014

127

Abstract

Two different configurations of steel-to-timber connections are tested in bending in normal conditions and under ISO-fire exposure. To observe the influence of clearances in the connection area on the fire resistance of the connections, two specimens were previously tested under cyclic loadings. These tests consist in the application of loading-unloading cycles by controlled displacements. The experimental results of connections tested in cold and under ISO-fire conditions are analyzed and commented. These results are then used to validate a finite element model. This model allows to simulate numerically the evolution of the temperatures inside the connections as well as their mechanical and thermo-mechanical behaviours. The thermal modelling is validated on the basis of the temperature-time evolutions measured during fire tests. The nonlinear modelling of the mechanical behaviour of timber is done using the Hill yield criterion in combination with the Tsaï-Wu failure criterion. The thermo-mechanical modelling allows obtaining fire resistances of the tested connections in good agreement with the experimental ones.

Keywords

Citation

Dhima, D., Audebert, M. and Bouchaïr, A. (2014), "Analysis of the Thermo-Mechanical Behaviour of Steel-to-Timber Connections in Bending", Journal of Structural Fire Engineering, Vol. 5 No. 2, pp. 97-112. https://doi.org/10.1260/2040-2317.5.2.97

Publisher

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Emerald Group Publishing Limited

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