Authors:
Qasim M. Shakir Department of Civil Engineering, College of Engineering, University of Kufa, Najaf, Iraq

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Yahya M. Yahya Department of Civil Engineering, College of Engineering, University of Kufa, Najaf, Iraq

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Abstract

In the present study, a comparison has been conducted to investigate the efficiency of stitching using the near-surface mounted steel bars and externally bonded carbon fibers reinforced polymers technique for strengthening the T-deep beams having large opening within the shear spans and with deficient shear reinforcement. Eight specimens with two locations of openings were tested. It was found that stitching of beams by steel bars with openings located flush to the flange yielded improvement in capacity in range (10–39%). Furthermore, Stitching by external bonded carbon sheets yield enhancements in capacity was 96 and 78% for the top location compared to the control specimen and the vertical near-surface mounted stirrups system. The respective values for the bottom location were 62 and 42% respectively.

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    S. Dey and M. M. Karthik, “Modeling four-pile cap behavior using three-dimensional compatibility strut-and-tie method,” Eng. Struct., vol. 198, 2019, Art no. 109499.

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    J. Bartuš and J. Odrobiňák, “Lateral-torsional buckling of nonsymmetrical plate girders with web openings,” Pollack Period., vol. 17, no. 3, pp. 4752, 2022.

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  • [4]

    Q. M. Shakir, S. D. Abd Alsaheb, and E. N. Farsangi, “Rehabilitation of deteriorated reinforced self-consolidating concrete brackets and corbels using CFRP composites: diagnosis and treatment,” J. Build. Pathol. Rehabil., vol. 8, 2023, Art no. 16.

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    A. I. Quadri and C. Fujiyama, “Assessment of repaired reinforced concrete dapped-end beams exhibiting bond deterioration under static and cyclic loading,” Construct. Build. Mater., vol. 403, 2023, Art no. 133070.

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    Q. M. Shakir and A. F. Alghazali, “New model of eco-friendly hybrid deep beams with wastes of crushed concrete,” Jurnal Teknologi, vol. 85, no. 6, 2023, Art no. 20431.

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    C. Aksoylu, Y. O. Özkılıç, E. Çeledir, and M. H. Arslan, “Bending performance of dapped-end beams having web opening: Experimental and numerical investigation,” Structures, vol. 48, pp. 736753, 2023.

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    M. F. M. Fahmy and L. K. Idriss, “Flexural behavior of large scale semi-precast reinforced concrete T-beams made of natural and recycled aggregate concrete,” Eng. Struct., vol. 198, 2019, Art no. 109525.

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    M. K. Ghali, M. Said, T. S. Mustafa, and A. A. El-Sayed, “Behavior of T-shaped RC deep beams with openings under different loading conditions,” Structures, vol. 31, pp. 11061129, 2021.

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  • [13]

    Q. M. Shakir, Y. M. Al-Sahlawi, B. B. Abd, and S. A. Hamad, “Nonlinear finite element analysis of high-strength reinforced concrete beams with severely disturbed regions,” Jordan J. Civil Eng., vol. 17, no. 1, pp. 2333, 2023.

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    M. R. Khalaf and A. H. A Al-Ahmed, “Shear strength of reinforced concrete deep beams with large openings strengthened by external pre-stressed strands,” Structures, vol. 28, pp. 10601076, 2020.

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    C. C. Chen, K. T. Lin, and Y. J. Chen, “Behavior and shear strength of steel shape reinforced concrete deep beams,” Eng. Struct., vol. 175, pp. 425435, 2018.

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    Q. M. Shakir and H. K. Hannon, “Novel hybrid model of reinforced concrete deep beams with curved hybridization,” J. Teknol, vol. 85, no. 2, 2023, Art no. 18703.

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  • [17]

    Q. M. Shakir and H. K. Hanoon, “New models for reinforced concrete precast hybrid deep-beams under static loads with curved hybridization,” Structures, vol. 54, pp. 10071025, 2023.

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  • [18]

    H. K. Lee, S. H. Cheong, S. K. Ha, and C. G. Lee, “Behavior and performance of RC T-section deep beams externally strengthened in shear with CFRP sheets,” Compos. Struct., vol. 93, no. 2, pp. 911922, 2011.

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    A. Kumari and A. N. Nayak, “An experimental approach for strengthening of RC deep beams with web openings using GFRP fabrics and gas actuated fasteners,” J. Building Eng., vol. 35, 2021, Art no. 102027.

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  • [20]

    Z. N. Jing, R. G. Liu, G. H. Xie, and D. Liu, “Shear strengthening of deep T-section RC beams with CFRP bars,” Materials, vol. 14, no. 20, 2021, Art no. 6103.

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  • [21]

    S. D. A. Alsaheb, “Repairing self-compacting reinforced concrete corbels using NSM steel bars and CFRP sheets techniques,” MSc Thesis, University of Kufa, Iraq, 2021.

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  • [22]

    Q. M. Shakir and R. Alliwe, “Upgrading of deficient disturbed regions in precast RC beams with Near Surface Mounted (NSM) steel bars,” J. Mater. Eng. Struct., vol. 7, no. 2, pp. 167184, 2020.

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  • [23]

    Q. M. Shakir and S. D. Abd Alsaheb, “High strength self-compacting corbels retrofitted by near surface mounted steel bars,” Pollack Period., vol. 18, no. 1, pp. 106112, 2023.

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  • Zoltán Siménfalvi (Institute of Energy and Chemical Machinery, Faculty of Mechanical Engineering and Informatics, University of Miskolc, Hungary)
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  • Barry H. V. Topping (Heriot-Watt University, UK, Faculty of Engineering and Information Technology, University of Pécs, Hungary)

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2023  
Scopus  
CiteScore 1.5
CiteScore rank Q3 (Civil and Structural Engineering)
SNIP 0.849
Scimago  
SJR index 0.288
SJR Q rank Q3

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