An Analytical Study of the Reinforcement of Fungal Slabs with CFRP Sheets after Creating Service Openings in them

Authors

DOI:

https://doi.org/10.5281/zenodo.19345338

Keywords:

Flat Slab, Opens In The Slabs, CFRP Plats, Steel Plats, Nonlinear Analysis, Slabs Strengthening

Abstract

When constructing modern buildings, openings are often used in reinforced concrete slabs to serve as corridors for various building services, but at the same time they are considered a weak source for the slabs, as they lead to a decrease in durability and rigidity unless they are strengthened with reinforcement to compensate for the reinforcement cut off as a result of the opening, whether it was specified before or after pouring .
The research included an analytical study, and an analytical model was built according to the finite element method using the safe [7] program for the samples to be studied, and its validity and reliability were verified. The analytical model was also used to study the contribution of the external reinforcement of the openings in several ways to bearing the loads applied to these slabs.
The results showed the effectiveness of the reinforcement of the opening area using steel plates and CFRP plates, and the great convergence between the analytical and experimental results in the reference study, where the average relative difference between them reached 5.59%. They also demonstrated the reliability of the analytical  model used. 

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References

[1] F. W. Hafez, “Strengthening of R.C. flat slabs with cut-out edge openings,” M.Sc. thesis, Faculty of Engineering, Cairo University, 2019.

[2] H. K. Shehab, A. S. Eisa, and K. A. El-Awady, “Strengthening of cutouts in existing one-way spanning R.C. flat slabs using CFRP sheets,” Int. J. Concr. Struct. Mater., vol. 11, no. 2, pp. 327–341, Jun. 2017, doi: 10.1007/s40069-017-0186-7.

[3] J. G. MacGregor and J. K. Wight, Reinforced Concrete: Mechanics and Design, 5th ed. Pearson Prentice Hall, 2009.

[4] W. Chen, Plasticity in Reinforced Concrete. J. Ross Publishing, 2007.

[5] ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-95) and Commentary (ACI 318R-95). American Concrete Institute, 1995.

[6] M. H. Ashur, “Nonlinear finite element analysis of RC beams strengthened with steel fiber-reinforced concrete (SFRC) overlays,” M.Sc. thesis, Faculty of Engineering, Islamic University of Gaza, 2015.

[7] Computers and Structures, Inc., SAFE 2016, ver. 16.0.2, structural analysis and design software, 2017.

[8] Syrian Engineers Syndicate and Syrian Council of Ministers, Syrian Arab Code for the Design and Implementation of Reinforced Concrete Structures, 2018 ed., 2018 (in Arabic).

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Published

2023-12-03

Issue

Section

Articles – Volume 1 Number 1

Categories

How to Cite

[1]
I. AL Tarsha, T. Gharib, and M. . Nour, “An Analytical Study of the Reinforcement of Fungal Slabs with CFRP Sheets after Creating Service Openings in them”, J.W.P.U, vol. 1, no. 1, pp. 13–39, Dec. 2023, doi: 10.5281/zenodo.19345338.

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