Abstract
The results of a non-linear analysis model of reinforced concrete beams using a high-performance fibre-reinforced cement (FRC) based matrix are described and compared with experimental observations. The constitutive relationship of the FRC materials used in both compression and tension and the logical flow chart for the non-linear analysis model are described. Analytical predictions of moment versus curvature and moment versus deflection curves are compared with experimentally observed results of reinforced concrete beams using a SIFCON (slurry infiltrated fibre concrete) matrix. The use of a fibre-reinforced matrix in the compression zone of a reinforced concrete beam allows for other over-reinforced sections to achieve significant increases in structureal ductility while resisting loads close to their ultimate load. Ductility and energy ratios, normalized by the control beam without fibres, ranged from 2.47 to 3.60 and 3.28 to 5.69, respectively; that is several hundred per cent in improvement. The analytical model is shown to predict, with reasonably good agreement, experimental observations of moment-curvature and moment-deflection curves. Thus it can be used to evaluate the effects of various parameters in order to optimize structural performance.
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