The glued-in rod (GIR) connections are lightweight, high-strength, and environmentally friendly post-anchored connections, which are suitable for large-span structural applications in engineered bamboo structures. Laminated flattened bamboo lumber (LFBL) is a new type of environment-friendly engineered bamboo. This study tested 56 LFBL connections with glued-in glass fiber-reinforced polymer (GFRP) rods under monotonic pullout loading. The research aimed to investigate the effects of adhesive thickness, bar diameter, and anchorage length on the bond-anchorage performance of the connections. It was concluded that GFRP rods with smaller rib heights (12 mm in diameter) predominantly exhibited bonding failure while splitting failure was more commonly observed in rods with larger rib heights (16 mm and 20 mm in diameter). For GFRP bars of the same diameter, the ultimate pullout load increased with increasing anchorage length. However, the average bond strength decreased with increasing anchorage length for specimens with 12 mm and 16 mm GFRP bars. In contrast, for specimens with 20 mm GFRP bars, the average bond strength slightly increased and then decreased, with the turning point occurring at a slenderness ratio of 5. A three-factor ANOVA analysis revealed that the anchorage length and diameter were the most significant variables influencing the bonding performance. The bond-anchorage performance of specimens with GFRP rods was lower than that of specimens with ribbed steel bars of the same diameter. However, the disparity in bonding performances between GIR connections using steel rods and GFRP rods narrowed as the diameter of the GFRP rods increased.
Glued-in GFRP rods in laminated flattened bamboo lumber subjected to monotonic loading / Zhang, H.; Li, H.; Tian, Y.; Liu, K.; Hong, C.; Yuan, C.; Corbi, O.. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 458:(2025). [10.1016/j.conbuildmat.2024.139591]
Glued-in GFRP rods in laminated flattened bamboo lumber subjected to monotonic loading
Corbi O.
2025
Abstract
The glued-in rod (GIR) connections are lightweight, high-strength, and environmentally friendly post-anchored connections, which are suitable for large-span structural applications in engineered bamboo structures. Laminated flattened bamboo lumber (LFBL) is a new type of environment-friendly engineered bamboo. This study tested 56 LFBL connections with glued-in glass fiber-reinforced polymer (GFRP) rods under monotonic pullout loading. The research aimed to investigate the effects of adhesive thickness, bar diameter, and anchorage length on the bond-anchorage performance of the connections. It was concluded that GFRP rods with smaller rib heights (12 mm in diameter) predominantly exhibited bonding failure while splitting failure was more commonly observed in rods with larger rib heights (16 mm and 20 mm in diameter). For GFRP bars of the same diameter, the ultimate pullout load increased with increasing anchorage length. However, the average bond strength decreased with increasing anchorage length for specimens with 12 mm and 16 mm GFRP bars. In contrast, for specimens with 20 mm GFRP bars, the average bond strength slightly increased and then decreased, with the turning point occurring at a slenderness ratio of 5. A three-factor ANOVA analysis revealed that the anchorage length and diameter were the most significant variables influencing the bonding performance. The bond-anchorage performance of specimens with GFRP rods was lower than that of specimens with ribbed steel bars of the same diameter. However, the disparity in bonding performances between GIR connections using steel rods and GFRP rods narrowed as the diameter of the GFRP rods increased.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
