Fracture and Structural Integrity e-ISSN 1971-8993 Open access
Structural Integrity and Safety: Experimental and Numerical Perspectives Vol. 18, No. 67 (2024)

Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups

Author and affiliation details
  • Ahmed Mahmoud Corresponding author Benha University, Faculty of Engineering at Shoubra, Civil Engineering Department, 108 Shoubra Street, Shoubra 11691, Cairo, Egypt. ahmed.m5882@gmail.com
  • Moaz A. Nasser Civil Engineering Department, High Institute for Engineering Technology, 21K Cairo-Belbies Rd., Al-Obour, Egypt ORCID iD0009-0002-3014-4278
  • Tarek S. Mostafa Benha University, Faculty of Engineering at Shoubra, Civil Engineering Department, 108 Shoubra Street, Shoubra 11691, Cairo, Egypt. ORCID iD0000-0003-1327-8143
  • Ahmed N. Khater Benha University, Faculty of Engineering at Shoubra, Civil Engineering Department, 108 Shoubra Street, Shoubra 11691, Cairo, Egypt. ORCID iD0000-0003-4528-8979
DOI
10.3221/IGF-ESIS.67.23
Pages
319-336
Published
Licence
CC BY 4.0
Published inVol. 18, No. 67 (2024)Go to the issue

Abstract

There are a few kinds of research about box section Reinforced Concrete (RC) beams under the effect of combined shear and torsional stresses. In the present research, the concept of adding external strengthening, in the transverse direction, is adopted. The paper focuses on using Glass Fiber Reinforced Polymer GFRP ropes as near-surface mount stirrups. Nine box-section concrete specimens were decanted and tested. Three variables are adopted, (1) GFRP stirrups diameter, (2) GFRP stirrups inclination, and (3) GFRP stirrups spacing. The experimental results showed considerable enhancement in the shear capacity of the strengthened beams by 8 to 56% depending on the effectiveness of the studied parameters. Ductility and toughness were improved when more intensive strengthening schemes were adopted. The shear capacity of all tested beams based on Egyptian code ECP 208–2019 is calculated and compared with that from American code ACI 440–2019 and Canadian code CSA-A23.3-04. The shear capacity from both Egyptian and American codes compared with experimental loads. The analytical results are conservative in some cases and unconservative in others while the analytical results in general are conservative. The Canadian code CSA-A23.3-04 is unconservative compared to the experimental results for the range of the studied parameters and specimens.

 

Keywords

Article history

  1. ReceivedUntil the next stage: 86 days
  2. RevisedUntil the next stage: 11 days
  3. AcceptedUntil the next stage: 8 days
  4. Published

About the authors

Moaz A. Nasser

Assistant Lecture, Civil Department, High Institute for Engineering Technology, 21K Cairo- Belbies Rd., Al-Obour, Egypt. Ph.D.

 

Tarek S. Mostafa

Associate Professor, Civil Engineering Department, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt

 

Ahmed N. Khater

Assistance Professor, Civil Engineering Department, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt

How to cite

APA

Mahmoud, A., Nasser, M., Mostafa, T., & Khater, A. (2023). Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups. Fracture and Structural Integrity, 18(67), 319–336. https://doi.org/10.3221/IGF-ESIS.67.23

IEEE

A. Mahmoud, M. Nasser, T. Mostafa, and A. Khater, “Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups,” Fracture and Structural Integrity, vol. 18, no. 67, pp. 319–336, 2023, doi: 10.3221/IGF-ESIS.67.23.

MLA

Mahmoud, Ahmed, et al. “Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups.” Fracture and Structural Integrity, vol. 18, no. 67, 2023, pp. 319–336. https://doi.org/10.3221/IGF-ESIS.67.23.

Chicago

Mahmoud, Ahmed, Moaz Nasser, Tarek Mostafa, and Ahmed Khater. 2023. “Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups.” Fracture and Structural Integrity 18 (67): 319–336. https://doi.org/10.3221/IGF-ESIS.67.23.

Harvard

Mahmoud, A., Nasser, M., Mostafa, T. and Khater, A. (2023) ‘Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups’, Fracture and Structural Integrity, 18(67), pp. 319–336. doi: 10.3221/IGF-ESIS.67.23.

Vancouver

Mahmoud A, Nasser M, Mostafa T, Khater A. Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups. Fracture and Structural Integrity. 2023;18(67):319-336. doi:10.3221/IGF-ESIS.67.23

BibTeX

@article{mahmoud2023, author = {Mahmoud, Ahmed and Nasser, Moaz and Mostafa, Tarek and Khater, Ahmed}, title = {Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups}, journal = {Fracture and Structural Integrity}, year = {2023}, volume = {18}, number = {67}, pages = {319--336}, doi = {10.3221/IGF-ESIS.67.23}, url = {https://doi.org/10.3221/IGF-ESIS.67.23}, issn = {1971-8993} }

RIS

TY - JOUR AU - Mahmoud, Ahmed AU - Nasser, Moaz AU - Mostafa, Tarek AU - Khater, Ahmed TI - Retrofitting of Box Section Concrete Beams to Resist Shear and Torsion Using Near-Surface-Mount (NSM) GFRP Stirrups JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2023 DA - 2023/12/17 VL - 18 IS - 67 SP - 319 EP - 336 DO - 10.3221/IGF-ESIS.67.23 UR - https://doi.org/10.3221/IGF-ESIS.67.23 SN - 1971-8993 ER -

Licence

Creative Commons Attribution 4.0 International

May be shared and adapted, provided appropriate credit is given. Copyright © 2023 Ahmed Mahmoud, Moaz A. Nasser , Tarek S. Mostafa , Ahmed N. Khater.

Copyright 
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.  

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