Shear Response of SFRC Beams Constructed with SCC and Steel Fibers

Abstract

This paper presents the experimental results from eleven slender beams constructed with highly workable SFRC tested under four-point loading. In the study self-consolidating concrete (SCC) was combined with steel fibers to improve workability and concrete placement. The response of the beams in terms of shear versus deflection response, crack control and damage tolerance is reported. The results demonstrate that the combined use of SCC and steel fibers in shear-deficient beams results in significant improvements in shear resistance and enhancements in flexural ductility. In the second part of the paper a model is proposed for predicting the shear capacity of SFRC beams. The proposed model and various equations proposed in the literature are used to predict the shear capacity of the beams tested in the experimental program. The results demonstrate the need for developing accurate and reliable equations for predicting the shear capacity of SFRC beams constructed with SCC and steel fibers.