What does this research mean for the field?

Reinforcing internal openings in UHPFRC deep beams with a combination of additional stirrups and vertical/horizontal bars significantly mitigates opening-induced shear capacity loss, recovering nearly 80% of the solid-beam capacity. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate how internal-opening reinforcement can reduce shear capacity loss in UHPFRC deep beams.

July 21, 2026Scientific ReportsOpen Access

Shear behavior of UHPFRC deep beams with internal opening reinforcement

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Authors

AYAhmed M. YousefMansoura University ATAhmed M. TahwiaMansoura University AEAli A. ElzainMansoura University

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Implication

Experimental and numerical investigation of shear capacity in UHPFRC beams with internal openings, indicating effective reinforcement techniques.

Key Points

To investigate how internal-opening reinforcement can reduce shear capacity loss in UHPFRC deep beams.
Experimentally tested eight UHPFRC deep beams under four-point loading with varying geometries and reinforcement techniques.
Divided beams into two groups based on their a/d ratio: Group I (0.61) and Group II (0.79).
Examined three reinforcement techniques: additional bars, stirrups, and diagonal cross-bars.
Unreinforced openings reduced cracking load by 41.4% and ultimate load by 40.4% compared to solid beams.
Reinforcement technique (1) improved ultimate shear capacity by 16.5%, (2) by 69.2%, and (3) by 25.3% versus unreinforced openings.
3D numerical model demonstrated predictive reliability with experimental-to-numerical ratios of 1.08 for ultimate shear load.

Cite This Study

Yousef et al. (2026) studied this question.

synapsesocial.com/papers/6a5f0bc586a4235cc16194bb https://doi.org/10.1038/s41598-026-62381-x

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Implication

Experimental and numerical investigation of shear capacity in UHPFRC beams with internal openings, indicating effective reinforcement techniques.

Shear behavior of UHPFRC deep beams with internal opening reinforcement

Discussion

Member takes

Implication

Key Points

Cite This Study

Shear behavior of UHPFRC deep beams with internal opening reinforcement

Discussion

Member takes

Implication

Key Points

Cite This Study

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