Experimental Investigation on Bond Stress Behavior of Sand-Coated GFRP Bars with Concrete
In this paper, a comprehensive experimental study was conducted to investigate the bond performance of sand-coated glass fiber reinforced polymer (GFRP) bars embedded in normal concrete with different bar sizes and different embedded regions of concrete beams following the regulation of the Rile...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Salahaddin University-Erbil
2023-06-01
|
| Series: | Zanco Journal of Pure and Applied Sciences |
| Subjects: | |
| Online Access: | https://zancojournal.su.edu.krd/index.php/JPAS/article/view/515 |
| Summary: | In this paper, a comprehensive experimental study was conducted to investigate the bond performance of sand-coated glass fiber reinforced polymer (GFRP) bars embedded in normal concrete with different bar sizes and different embedded regions of concrete beams following the regulation of the Rilem beam. The achieved results are compared to the analytical equations presented by current codes and reputable recent research using the average bond strength and the free end bond stress-slip curves. This study contains the effect of bar size and embedded length on bond stress and slippage of sand-coated GFRP bars. From the data observed, bond stress of 8mm bar size is about 23% higher than 10mm and 16% higher than 12mm bar size for 10D embedded length. The 8mm bar size showed the maximum bond stress of 13.8MPa among all the other specimens while the maximum slip measurement was detected from a 12mm bar size of 1.519mm. Bond stress with beam test showed a higher value by almost twice than those derived from other codes. In general, as the bar size increases the bond stress decreases, and as the embedded length increases the bond stress tends to fall. Similarly, the slip of the bar rises as the embedded length rises. The embedded length of 10D recommended by RILEM 1994 is inadequate for GFRP bars. Finally, GFRP bars show higher bond stress than steel bars by 20%. |
|---|---|
| ISSN: | 2218-0230 2412-3986 |