Abstract
Steel fiber has been used successfully in concrete mixtures to control volumetric changes, including shrinkage. However, the feasibility of the use of steel fiber has been restricted to nonstructural construction, such as ‘slab on ground’. Recently, researchers have attempted to expand the applications of steel fiber to replace structural reinforcement (rebar) and have shown promising results in its substitution for shear reinforcement. Few studies have been conducted to ensure the feasibility of using steel fiber in structural components, however. This experimental study was designed to investigate the shear performance of steel fiber-reinforced concrete beams using the tensile strength of steel fiber and the shear span-to-depth ratio as variables. The experimental results indicate that the tensile strength of steel fiber significantly affects the shear strength of steel fiber-reinforced concrete beams, regardless of the shear span-to-depth ratio, and that steel fiber can play a role in shear reinforcement of concrete beams.
Highlights
Steel fiber-reinforced concrete (SFRC) has excellent mechanical characteristics in terms of shear and flexural strength, impact resistance, and fatigue resistance
Six SFRC beams were experimentally investigated according to their shear span-to-depth ratios
As mentioned in the flexural behavior of SFRC, this is because continuous fiber bridge action becomes possible when the strength of steel fiber is higher than the bonding of the composite
Summary
Steel fiber-reinforced concrete (SFRC) has excellent mechanical characteristics in terms of shear and flexural strength, impact resistance, and fatigue resistance. Local cracks in SFRC can be controlled by redistributing the cracks throughout the concrete matrix. SFRC has been implemented for various construction uses, including slabs on ground and structural members. Since the late 1990s, the feasibility of replacing the shear reinforcement in SFRC has been investigated, as have several parameters associated with shear strength of the SFRC beam, such as fiber type, compressive strength of concrete, and steel fiber contents [1,2,3,4,5,6,7,8]. For the minimum shear reinforcement replacement [1]. The shear strength of SFRC is greater
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