Steel fiber composite bar (SFCB) is a novel type of reinforcement, which has good ductility and durability
performance. Due to the unique pseudo strain hardening tensile behavior of SFCB, different flexural behavior is expected of
SFCB reinforced concrete (SFCB-RC) beams from traditional steel bar reinforced concrete (S-RC) beams and FRP bar
reinforced concrete (F-RC) beams. To investigate the flexural behavior of SFCB-RC beam, four points bending tests were
carried out and different flexural behaviors between S/F/SFCB-RC beams were discussed. An flexural analytical model of
SFCB-RC beams is proposed and proved by the current and existing experimental results. Based on the proposed model, the
influence of the fiber volume ratio R of the SFCB on the flexural behavior of SFCB-RC beams is discussed. The results show
that the proposed model is effective for all S/F/SFCB-RC flexural members. Fiber volume ratio R is a key parameter affecting
the flexural behavior of SFCB-RC. By controlling the fiber volume ratio of SFCB reinforcements, the flexural behavior of the
SFCB-RC flexural members such as bearing capacity, bending stiffness, ductility and repairability of SFCB-RC structures can
be designed.
Jia-Xiang Lin, Yong-Jian Cai, Ze-Ming Yang, Shu-Hua Xiao, Zhan-Biao Chen, Li-Juan Li,
Yong-Chang Guo and Fei-Fei Wei:School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
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