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<p>Older buildings and structures usually require some form of maintenance and repair due to the harsh environments, natural calamities, varying load requirements, corrosion and poor maintenance. Fiber-reinforced polymer composites (FRPC) have been found to be a viable solution in order to increase the life of the structures and improve their performance. Such materials are significant in strengthening and rehabilitation of reinforced concrete (RC) buildings in making them stronger and more resistant to different load conditions and the unfavorable environment. Six RC T-beams were in this case cast and tested using a two-point loading arrangement. Among these, two T-beams with two different percentages of reinforcement were chosen to serve as control beams. The Near-Surface Mounted Side Face (NSMS) approach was used to strengthen the remaining four T-beams. The remaining four T-beams underwent strengthening using NSMS technique. Two of these beams had a percentage of reinforcement (P<sub>t</sub>) of 0.463, while the other two beams had a P<sub>t</sub> of 0.825. These beams were tested under two-point loading and the ultimate load, deflection and debonding failure were measured. The experimental study involved the comparison of the performance of the control T-beams, and the strengthened specimens. The findings showed that T-beams reinforced with NSMS method showed a slight increase in performance relative to control beams.</p>

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Investigation on the flexural performance of preloaded RC T-beams strengthened by the NSM side-face technique using CFRP laminates

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • K. Mallikarjuna,
  • P. M. Ravindra,
  • H. N. Jagannath Reddy,
  • V. Naveen,
  • D. P. Archana

摘要

Older buildings and structures usually require some form of maintenance and repair due to the harsh environments, natural calamities, varying load requirements, corrosion and poor maintenance. Fiber-reinforced polymer composites (FRPC) have been found to be a viable solution in order to increase the life of the structures and improve their performance. Such materials are significant in strengthening and rehabilitation of reinforced concrete (RC) buildings in making them stronger and more resistant to different load conditions and the unfavorable environment. Six RC T-beams were in this case cast and tested using a two-point loading arrangement. Among these, two T-beams with two different percentages of reinforcement were chosen to serve as control beams. The Near-Surface Mounted Side Face (NSMS) approach was used to strengthen the remaining four T-beams. The remaining four T-beams underwent strengthening using NSMS technique. Two of these beams had a percentage of reinforcement (Pt) of 0.463, while the other two beams had a Pt of 0.825. These beams were tested under two-point loading and the ultimate load, deflection and debonding failure were measured. The experimental study involved the comparison of the performance of the control T-beams, and the strengthened specimens. The findings showed that T-beams reinforced with NSMS method showed a slight increase in performance relative to control beams.