Shear capacity of steel fiber-reinforced concrete beams

This study proposes a shear strength model for steel fiber-reinforced concrete (SFRC) beams—the so-called dual potential capacity model (DPCM). It can suitably consider the dominant shear failure mode, including the shear contributions of the compression side and the cracked tension side, at the section considered. In the proposed approach, the direct tension force transfer model (DTFTM), which can consider the random orientation and bond characteristics of steel fibers at a crack surface, has been introduced to calculate the shear contribution of the steel fibers. Shear test results of SFRC beams have been collected from various references and compared with the analysis results of the proposed DPCM. A simplified version of the DPCM was also developed for practical applications by reducing the iterative computational procedures.