Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pullout behaviors of basalt fiber-reinforced polymer bars with mechanical anchorages for concrete structures exposed to seawater
Highlights Mechanical anchorages avoid the splitting failure of concrete with FRP bars. Composite head improves the pullout capacity of FRP bars in concrete by 20 %. Composite head increases the ductility of FRP-bar-concrete interface. BFRP bars with composite heads in concrete exhibit no degradation in seawater.
Abstract This study presents an investigation of the pullout behaviors of basalt fiber-reinforced polymer (BFRP) bars with mechanical anchorages in concrete exposed to seawater. A total of forty-eight pullout specimens were prepared. Three types of mechanical anchorages that can be flexibly assembled on FRP bars, that is, additional straight bar, additional hook, and composite head, were adopted. The experimental variables comprised the anchorage type, conditioning temperature, and conditioning duration. The maximum pullout load (P max) and corresponding slip (s max), and the plateau length at the peak (l p) and slope of the descending branch (k d) of the load-slip curves, were evaluated and discussed. The results show that mechanical anchorages contribute to significant increases in the l p and decreases in the k d. Furthermore, the composite head achieves 32 % and 10 % increases in P max and l p respectively, and 20 % and 36 % decreases in s max and k d respectively, compared with the other two types of anchorages. After conditioning in seawater, the specimens with composite heads exhibit no significant degradation in their pullout behaviors, which indicates the effectiveness of the composite head in the protection against corrosive media. These results demonstrate the application prospects of a composite-head mechanical anchorage for FRP reinforcement in concrete structures constructed in the marine environment.
Pullout behaviors of basalt fiber-reinforced polymer bars with mechanical anchorages for concrete structures exposed to seawater
Highlights Mechanical anchorages avoid the splitting failure of concrete with FRP bars. Composite head improves the pullout capacity of FRP bars in concrete by 20 %. Composite head increases the ductility of FRP-bar-concrete interface. BFRP bars with composite heads in concrete exhibit no degradation in seawater.
Abstract This study presents an investigation of the pullout behaviors of basalt fiber-reinforced polymer (BFRP) bars with mechanical anchorages in concrete exposed to seawater. A total of forty-eight pullout specimens were prepared. Three types of mechanical anchorages that can be flexibly assembled on FRP bars, that is, additional straight bar, additional hook, and composite head, were adopted. The experimental variables comprised the anchorage type, conditioning temperature, and conditioning duration. The maximum pullout load (P max) and corresponding slip (s max), and the plateau length at the peak (l p) and slope of the descending branch (k d) of the load-slip curves, were evaluated and discussed. The results show that mechanical anchorages contribute to significant increases in the l p and decreases in the k d. Furthermore, the composite head achieves 32 % and 10 % increases in P max and l p respectively, and 20 % and 36 % decreases in s max and k d respectively, compared with the other two types of anchorages. After conditioning in seawater, the specimens with composite heads exhibit no significant degradation in their pullout behaviors, which indicates the effectiveness of the composite head in the protection against corrosive media. These results demonstrate the application prospects of a composite-head mechanical anchorage for FRP reinforcement in concrete structures constructed in the marine environment.
Pullout behaviors of basalt fiber-reinforced polymer bars with mechanical anchorages for concrete structures exposed to seawater
Shi, Jianzhe (Autor:in) / Sun, Shenpeng (Autor:in) / Cao, Xuyang (Autor:in) / Wang, Haitao (Autor:in)
24.02.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Modeling the pullout behavior of fiber reinforced polymer bars from concrete
| Online Contents | 2010
Modeling the pullout behavior of fiber reinforced polymer bars from concrete
| British Library Online Contents | 2010