Experimental Study of Interface Shear Transfer of Steel Fiber Reinforced Concrete Members

• Published in: International journal of concrete structures and materials Vol. 19; no. 1; pp. 28 - 19
• Main Authors: Jeong, Daun, Son, Dong-Hee, Choi, Chang-Sik, Bae, Baek-Il
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 17.04.2025; Springer; Springer Nature B.V; SpringerOpen; 한국콘크리트학회
• Subjects: Building Materials; Compressive strength; Concrete; Concrete construction; Concrete properties; Design standards; Dowel action; Engineering; Friction; Precast concrete; Reinforced concrete; Reinforcing steels; Shear; Shear friction; Solid Mechanics; Steel fiber reinforced concrete; Steel fiber reinforced concretes; Steel fibers; Structural Materials; Tensile strength; 토목공학; South Korea; Dowel action; Steel fiber reinforced concrete; Shear friction; Precast concrete
• ISSN: 2234-1315; 1976-0485; 2234-1315
• DOI: 10.1186/s40069-024-00760-2

This study aimed to evaluate the shear friction strength mechanism of monolithically and separately cast concrete members using steel fiber reinforced concrete (SFRC). To achieve this, a total of 30 push-off tests were conducted with variables such as volume fraction of steel fiber, clamping force of shear-friction reinforcement, and concrete compressive strength. The experimental results showed that the inclusion of steel fibers significantly increased the shear friction strength of monolithically cast concrete. Similarly, the strength improvement in the separately cast specimens was notable with the addition of steel fibers. Notably, as the steel fiber content increased, the concrete contribution also improved, which was attributed to the enhancement of dowel action by the shear-friction reinforcement and the increased tensile strength of the concrete. When comparing the experimental results with current design standards, Eurocode2 provided the most accurate predictions, suggesting that the tensile strength of concrete increased by steel fibers can lead to more precise predictions of shear friction strength.