A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bond enhancement for NSM FRP bars in concrete using different anchorage systems
Highlights Two innovative anchorage systems were developed for NSM FRP bar. The feasibility of the anchorage systems to improve the bond of the NSM FRP bar was verified. The bond enhancement of each proposed anchorage system was compared.
Abstract Studies have shown that the near-surface mounted (NSM) FRP technique provides better bond performance than the externally bonded (EB) FRP method in strengthening applications. However, undesirable intermediate crack-induced debonding failures and end debonding failures are still frequently observed in NSM FRP reinforcements. In this study, the additional ribs (ARs) anchorage system and the wire mesh mortar protection layer (WML) anchorage system were proposed in an attempt to eliminate such premature debonding failures in NSM FRP strengthening system. The testing results of 20 direct pull-out specimens were used to verify the feasibility of the two proposed anchorage systems in improving the bond behaviour of NSM FRP bars. The individual use of the ARs anchorage system and WML anchorage system enhanced the bond strength of the NSM FRP bars up to 40.7% and 69.7%, respectively. The combined use of the two developed anchorage systems was found to be the most effective in increasing the bond performance of the NSM FRP bars, providing a maximum bond enhancement of 114.3%.
Bond enhancement for NSM FRP bars in concrete using different anchorage systems
Highlights Two innovative anchorage systems were developed for NSM FRP bar. The feasibility of the anchorage systems to improve the bond of the NSM FRP bar was verified. The bond enhancement of each proposed anchorage system was compared.
Abstract Studies have shown that the near-surface mounted (NSM) FRP technique provides better bond performance than the externally bonded (EB) FRP method in strengthening applications. However, undesirable intermediate crack-induced debonding failures and end debonding failures are still frequently observed in NSM FRP reinforcements. In this study, the additional ribs (ARs) anchorage system and the wire mesh mortar protection layer (WML) anchorage system were proposed in an attempt to eliminate such premature debonding failures in NSM FRP strengthening system. The testing results of 20 direct pull-out specimens were used to verify the feasibility of the two proposed anchorage systems in improving the bond behaviour of NSM FRP bars. The individual use of the ARs anchorage system and WML anchorage system enhanced the bond strength of the NSM FRP bars up to 40.7% and 69.7%, respectively. The combined use of the two developed anchorage systems was found to be the most effective in increasing the bond performance of the NSM FRP bars, providing a maximum bond enhancement of 114.3%.
Bond enhancement for NSM FRP bars in concrete using different anchorage systems
Wang, Qiang (author) / Li, Ting (author) / Zhu, Hong (author) / Su, Weiqiang (author) / Hu, Xiuxiu (author)
2020-01-29
Article (Journal)
Electronic Resource
English
| British Library Conference Proceedings | 2009
Bond and Anchorage of Deformed Bars in High Strength Concrete
| British Library Conference Proceedings | 1995
Bond and anchorage of ribbed bars in high-strength concrete
| TIBKAT | 2000
Bond and Anchorage of Ribbed Bars in High-Strength Concrete
| British Library Conference Proceedings | 1996
Bond behaviors of BFRP bars in concrete using carbon fiber rib anchorage
| Elsevier | 2022