Torsional responses of steel fiber-reinforced concrete members

Abstract

This study introduces two analytical approaches to estimate the torsional behavior of steel fiber reinforced concrete (SFRC) members. The first approach utilized the tensile constitutive relationship of SFRC in tension derived from SFRC panel test results, and the second approach adopted the direct tension force transfer model, which were applied to the smeared-truss model. In addition, three torsional members including two SFRC specimens with large amounts of transverse reinforcement were tested, and twenty-three SFRC torsional specimens were collected from literature to verify the proposed models. From this study, it appears that the proposed approaches provide enhanced analysis accuracy in estimating the torsional capacities of SFRC members, and closely capture their overall torsional responses compared to other models examined in this study.