Dependence of the complete diagrams of deformation of steel fiber reinforced concrete under axial tension from the parameters of fiber reinforcement
Abstract
Dependence of the complete diagrams of deformation of steel fiber reinforced concrete under axial tension from the parameters of fiber reinforcement
Incoming article date: 28.05.2021The article presents dependencies between deformation characteristics of SFRC with a high-strength cement-sand matrix from the type of steel fiber and its volumetric content. It was found that the introduction of fiber imparts plasticity to the matrix. Plasticity depends more on the type of fiber than on its amount per unit volume. Full deformation diagrams of steel fiber reinforced concrete have a descending branch, in contrast to the matrix diagram. The introduction of steel fiber increases the deformations corresponding to the ultimate tensile strength by no more than 75%. Deformations of the descending branch of the diagram, depend on the type of fiber, characterizing the plastic properties of steel fiber reinforced concrete. At the same time, it essential how fiber ensures the adhesion to the matrix: along its entire length due to its fiber profile or due to the design features of the anchors at its ends.
Keywords: axial tension, complete diagram of deformation of steel fiber reinforced concrete, type of fiber, percentage of fiber reinforcement, ductility, residual strength