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arXiv · 2501.08704

Experimental and numerical analysis of a full-scale timber-concrete-composite beam from simply supported to frame-connected

Dolores Otero-Chans·Félix Suárez-Riestra·Emilio Martín-Gutiérrez·Javier Estévez-Cimadevila
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Abstract

Numerous TCC (timber-concrete composite) systems have been proposed and studied in recent years. Most of the studies have focused on the behaviour of the timber-concrete shear connection and the flexural behaviour of floor elements. This paper presents the results of an experimental and numerical study comparing the behaviour of a simply support beam and a beam connected in continuity to mixed TCC supports (a frame-connected beam). Full-scale tests were carried out with 370 mm wide beams and 5.9 m span. Experimental results have shown that the deflection in the frame-connected beam was less than 50% of those observed in the simply supported beam. A three-dimensional finite element model has been validated and calibrated from the test results. This model has been used to evaluate the moment redistribution in the frame-connected beam which, in the case studied, allows the maximum stresses in the timber members to be reduced by up to 49%. Based on the numerical and experimental results, a dimensioning criterion is proposed for the frame-connected beams.

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Dolores Otero-Chans, Félix Suárez-Riestra, Emilio Martín-Gutiérrez, Javier Estévez-Cimadevila. 2025-01-15. Experimental and numerical analysis of a full-scale timber-concrete-composite beam from simply supported to frame-connected. https://doi.org/10.1016/j.engstruct.2025.119624

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