Flexural response of preloaded RC beams strengthened by NSM-FRP bars | ||
| Journal of International Society for Science and Engineering | ||
| Volume 7, Issue 3, September 2025, Pages 55-62 PDF (1.11 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jisse.2025.429548.1119 | ||
| Authors | ||
| Alaa Farouk Omar Elkashif* 1; Abdel-Rahman Hazem2 | ||
| 1Lecturer, Housing and Building National Research Center, Cairo, Egypt | ||
| 2Ph.D. 2025 in Structural Engineering, Faculty of Engineering, Cairo University, Egypt | ||
| Abstract | ||
| This research presents an experimental investigation of the flexural strengthening of preloaded RC beams. There are two parameters that were studied in this experiment: the preloading levels and the type of FRP bars. Two types of FRP bars were used: GFRP bars and BFRP bars. Two values of percentages of the preloading levels were used: 50% and 75% of the failure load of the control RC beam. Five RC beams are studied in this experiment; one of them was tested as a control RC beam, and the other four RC beams were divided into two groups. The first group included two RC beams strengthened with two GFRP bars, and the second group included two RC beams strengthened with two BFRP bars. The results of the experiment indicated that the strengthening RC beams preloaded to 50% of the failure load of the control RC beam had higher flexural load-carrying capacity and ductility than the strengthening RC beams preloaded to 75% of the failure load of the control RC beam, and the strengthening RC beams preloaded to 50% of the failure load of the control RC beam had lower deflection than the RC beams preloaded to 75% of the failure load of the control RC beam. | ||
| Keywords | ||
| Flexural Strengthening; Preloaded RC Beams; BFRP bars; GFRP bars; NSM | ||
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