Analysis of Uniaxial Tensile Behavior of Reinforced Fiber-Reinforced Concrete Members considering Probabilistic Distribution

In order to apply fiber-reinforced concrete (FRC) as a structural member, numerous studies have been conducted to predict the structural behavior of fiber-reinforced concrete with rebars (R/FRC). This paper proposes an analytical method for predicting the tensile behavior of R/FRC members. The method considers three components of the tensile force in the members: fibers, the concrete matrix, and rebars. Specifically, when evaluating the tensile force exerted by the fibers, the analysis considered the probabilistic distribution of the force through cracks, as multiple cracks were observed in the R/FRC member. By analyzing existing test specimens, it was seen that the proposed method accurately predicted the actual tensile force-deformation behavior. When the probabilistic distribution was not considered, the tensile behavior of the R/FRC member was overestimated. Therefore, it can be concluded that the effect of multiple cracks should be considered in the analysis of R/FRC members. The main results of this study are expected to be useful for further research in the field of the structural behavior of R/FRC members.