Instantaneous deflection calculation for steel fibre reinforced concrete one way members

In this paper, a simple yet accurate method for determining the instantaneous deflection of steel fibre reinforced concrete (SFRC) one way members is presented. The model builds upon previous work conducted by the authors by considering the beneficial effect of the fibres across a crack to the tension stiffening relationship of SFRC. In turn, the increased stiffness across the crack is translated into curvature and then to deflection. The model reported herein is founded upon a previously reported adaptation of the Tension Chord Model of Marti et al. (1998) for the prediction of deflections for RC beams and is shown to provide good correlations to test data.