Structural Engineering and Mechanics

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Potential side-NSM strengthening approach to enhance the flexural performance of RC beams: Experimental, numerical and analytical investigations

  • Md. Akter, Hosen (Department of Civil and Environmental Engineering, College of Engineering, Dhofar University) ;
  • Mohd Zamin, Jumaat (Department of Civil Engineering, Faculty of Engineering, University of Malaya) ;
  • A.B.M. Saiful, Islam (Department of Civil & Construction Engineering, Imam Abdulrahman Bin Faisal University) ;
  • Khalid Ahmed, Al Kaaf (Department of Civil and Environmental Engineering, College of Engineering, Dhofar University) ;
  • Mahaad Issa, Shammas (Department of Civil and Environmental Engineering, College of Engineering, Dhofar University) ;
  • Ibrahim Y., Hakeem (Civil Engineering Department, Najran University) ;
  • Mohammad Momeen, Ul Islam (Discipline of Civil and Infrastructure Engineering, School of Engineering, RMIT University)
  • Received : 2021.06.25
  • Accepted : 2022.12.14
  • Published : 2023.01.25
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Abstract

The performance of reinforced concrete (RC) beam specimens strengthened using a newly proposed Side Near Surface Mounted (S-NSM) technology was investigated experimentally in this work. In addition, analytical and nonlinear finite element (FE) modeling was exploited to forecast the performance of RC members reinforced with S-NSM utilizing steel bars. Five (one control and four strengthened) RC beams were evaluated for flexural performance under static loading conditions employing four-point bending loads. Experimental variables comprise different S-NSM reinforcement ratios. The constitutive models were applied for simulating the non-linear material characteristics of used concrete, major, and strengthening reinforcements. The failure load and mode, yield and ultimate strengths, deflection, strain, cracking behavior as well as ductility of the beams were evaluated and discussed. To cope with the flexural behavior of the tested beams, a 3D non-linear FE model was simulated. In parametric investigations, the influence of S-NSM reinforcement, the efficacy of the S-NSM procedure, and the structural response ductility are examined. The experimental, numerical, and analytical outcomes show good agreement. The results revealed a significant increase in yield and ultimate strengths as well as improved failure modes.

Keywords

Acknowledgement

The authors warmly acknowledge the University of Malaya High Impact Research Grant D000036-16001 for its financial support.

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