Finite element modelling of adhesively bonded timber-concrete composite beams

Abstract

This study presents a 3D non-linear Finite Element (FE) model for adhesively bonded Timber-Concrete Composite (TCC) beams. A comprehensive analysis was conducted through a combination of numerical simulations and experimental tests by investigating the deformation behaviour, bending stress distribution, ultimate capacity, and failure characteristics of TCC beams. Despite the challenges that arose in cases of bonding failure, leading to exceptional deviations in behaviour, the results revealed a remarkable agreement between the predictions of the FE model and the outcomes of experimental tests. The FE model accurately predicted the degree of composite action. Notably, the FE model and analytical model based on the γ-method exhibit comparable predictive performance in terms of deformation. Bending stress distribution findings highlighted a strong correspondence between FE simulations and experimental data. Furthermore, the FE model demonstrated efficacy in predicting the ultimate capacity of TCC beams and consistently captured failure modes, indicating its reliability in simulating the complex behaviour of TCC beams.