Abstract
In this work, the experimental investigation and theoretical analysis on the flexural behavior of steel-reinforced concrete-basalt fiber reinforced concrete (RC-BFRC) beams were conducted. The formulae for calculating the cracking, yielding and ultimate moments, and the deflection of RC-BFRC beams were proposed and validated through experiments. Experimental results demonstrated significant enhancement in load-carrying capacity, deformation ability, and crack resistance for the RC-BFRC beam compared with the ordinary reinforced concrete (RC) beam. And the ultimate deflection of the RC-BFRC beam was slightly smaller than that of the steel-reinforced basalt fiber reinforced concrete (RBFRC) beam at the same fiber content. To gain a deeper understanding of the flexural performance of the RC-BFRC beam, a parametric study was also conducted based on the proposed methods. The results indicated that yield and ultimate moments increased but ultimate curvature in case of under-reinforced failure decreased with the increase of yield strength and amount of steel reinforcement. In case of under-reinforced failure, curvature ductility and energy dissipation of the whole stage decreased with the increase of yield strength and amount of steel reinforcement but increased with the increase of concrete compressive strength and concrete ultimate compressive strain.
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