In this paper, the structural behavior of hybrid reinforcement concrete RC beams with openings was investigated. Goals included evaluating the impact of utilizing Slurry Infiltrated Fiber Concrete SIFCON. The experimental program consists of casting and testing four beams, two of them cast with Normal Concrete NC completely (solid beam and beam with openings), while the other specimens were cast with NC and used SIFCON surrounding the openings (solid beam and beam with openings). Ultimate load capacity, load-deflection curves, and crack patterns were investigated in this research. Results show an improvement in flexural behavior and an increase in cracking load for specimens casting with SIFCON as compared with NC. It was found Even in the failure state, no vertical or horizontal cracks were seen at the interfaces between normal concrete and SIFCON in hybrid beams. This is a good sign that the casting technique utilized in the current investigation is effective. On the other hand, hybrid concrete beams with openings display great development in ultimate load by about (400%) as compared with specimen cast with NC-containing openings.

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