Browsing by Author "Deifalla, Ahmed F"

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FRP-RC Slabs Under Punching Shear: Assessment of Existing Models
(Springer Science and Business Media B.V., 2023-11) Tawfik, Maged; Ibrahim, Taha; Ahmad, Mahmood; Deifalla, Ahmed F; Awad, Ahmed; El-Said, Amr
The purpose of this study is to examine the punching shear behavior of concrete slabs reinforced with FRP. We compared and quickly described 21 strength models. In addition, based on overall performance, strength models were contrasted with one another in terms of the experimentally observed strength. Conclusions were made and discussed, which may help future design codes evolve more effectively, It was decided where to focus future studies. This might aid in the development of future design codes. The ACI is the least realize model, although taking into account the effects of size, dowel action, depth-to-control perimeter ratio, concrete compressive strength, and shear span-to-depth ratio.
Torsion Strength of Concrete Beams with Steel Fibers, Lightweight, or FRP: Data Driven Code Appraisal
(Springer Science and Business Media B.V., 2023-11) Awad, Ahmed; Ahmed, Jawad; Deifalla, Ahmed F; Tawfik, Maged; El-Said, Amr
Despite extensive research efforts directed toward the shear and torsional behavior of concrete elements, torsion strength remains an unexplored area. Numerous new materials are being used in construction as a result of advances in concrete technology. The use of lightweight concrete, steel-fiber reinforced concrete, and FRP-reinforced concrete are all kinds of advancements. The objective of the current work is to enhance torsion strength prediction for these three aspects. A summary of a series of power equation models for torsion strength based on a massive experimental database of 346 beams tested under torsion is outlined. The model validation is discussed. The developed models are accurate while remaining simple for design purposes.