A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bond strength of fiber reinforced polymer rebars in normal strength concrete
This study focuses on the bond of straight FRP reinforcing bars in normal strength concrete using the pullout test method. The FRP reinforcing bars (AFRP (aramid fibre reinforced polymer), CFRP (carbon fibre reinforced polmer), and GFRP (glass fibre reinforced polymer)) are generally manufactured using the pultrusion process, and are made of continuous longitudinal fibers bound together with a thermosetting vinyl ester resin. The bond inprovement is achieved through sand coating, surface texture, helical wrapping with sand coating, deep dents (grooves), and deformation by resin. For each of the tested rebars, average bound stress-slip relationships and failure mode were experimentally determined. The results of this study can be summarized as follows: surface deformations similar to the ones on steel are very effective means of bond enhancement. Pullout load increases with increasing embedment length, but the average bond strength decreases, due to the fact that the pullout load increase is not proportional to the increase in embedment length. The bond strength of an FRP rebar is typically 40-100 % that of a steel rebar for pullout failure mode.
Bond strength of fiber reinforced polymer rebars in normal strength concrete
This study focuses on the bond of straight FRP reinforcing bars in normal strength concrete using the pullout test method. The FRP reinforcing bars (AFRP (aramid fibre reinforced polymer), CFRP (carbon fibre reinforced polmer), and GFRP (glass fibre reinforced polymer)) are generally manufactured using the pultrusion process, and are made of continuous longitudinal fibers bound together with a thermosetting vinyl ester resin. The bond inprovement is achieved through sand coating, surface texture, helical wrapping with sand coating, deep dents (grooves), and deformation by resin. For each of the tested rebars, average bound stress-slip relationships and failure mode were experimentally determined. The results of this study can be summarized as follows: surface deformations similar to the ones on steel are very effective means of bond enhancement. Pullout load increases with increasing embedment length, but the average bond strength decreases, due to the fact that the pullout load increase is not proportional to the increase in embedment length. The bond strength of an FRP rebar is typically 40-100 % that of a steel rebar for pullout failure mode.
Bond strength of fiber reinforced polymer rebars in normal strength concrete
Die Bindefestigkeit von faserverstärkten Kunststoffstäben in normalfestem Beton
Okelo, Roman (author) / Yuan, Robert L. (author)
Journal of Composites for Construction ; 9 ; 203-213
2005
11 Seiten, 9 Bilder, 6 Tabellen, 15 Quellen
Article (Journal)
English
armierter Beton , Armierung , Stab , Pultrudieren , carbonfaserverstärkter Kunststoff , glasfaserverstärkter Kunststoff , Para-Aramidfaser , faserverstärkter Kunststoff , Vinylesterharz , Korrosionsbeständigkeit , Ausziehwiderstand , Bindefestigkeit , Verstärkung (Festigkeit) , Oberflächenstruktur , Haftfestigkeit , Einbettung
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