Compressive behaviour of short-fibre-reinforced concrete

The most important parameters studied in the analysis of steel-fibre-reinforced composite (SFRC) are the tensile and flexural strength since these parameters dictate the composite behaviour. SFRC under compression has received less attention and most of the works are empirical and case-specific. However, compressive strength plays an important role in the complete understanding of composite behaviour. The current paper presents a comprehensive approach to predict the compressive behaviour of SFRC considering the possibility of fibre buckling in the matrix. The analytical development is based on the micro-mechanical behaviour describing the phenomenon in terms of fibre–matrix constitutive properties, their interface and proportioning. The development is based on single fibre stress–strain relationships, which is subsequently implemented into a composite model. The results of the analytical model are supplemented with those of experimental investigations and the results of the existing model in literature. The stress–strain behaviours capture the trend quite satisfactorily and are in good conformity with the results of experimental investigation and the existing model.