A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Reinforced concrete T-beams strengthened in shear with fiber reinforced polymer sheets
This project provides a series of laboratory controlled experiments using concrete beam specimens strengthened externally in shear with fiber reinforced polymer (FRP) sheets. The project's objectives are to study the effects of concrete strength, stirrup spacing, height of the beam web, and type of FRP on the behavior of FRP-strengthened concrete beams.The following conclusions can be drawn: The effectiveness of FRP strengthening to shear contribution, is dependent on the amount of internal shear reinforcement. It appears that the composites are less effective when beams are heavily reinforced with internal shear reinforcement. The plane section does not remain plane in the shear span after a certain load level is reached, but the external FRP sheets delay the loss of plane section behavior. The shear forces carried by arching action are also delayed when FRP is used. The remaining beam action at ultimate, with significant shear reinforcement by either internal steel stirrups or external FRP sheets, accounts for about 20 % of the total shear force. The failure mode of the beams reinforced by continuous uniaxial glass fiber was by vertical tearing (unzipping) of the fibers close to the support. Triaxial glass-fiber reinforcement provided the beam with more ductile failure than did unidirectional glass fibers or unidirectional carbon fibers with a 50 mm gap.
Reinforced concrete T-beams strengthened in shear with fiber reinforced polymer sheets
This project provides a series of laboratory controlled experiments using concrete beam specimens strengthened externally in shear with fiber reinforced polymer (FRP) sheets. The project's objectives are to study the effects of concrete strength, stirrup spacing, height of the beam web, and type of FRP on the behavior of FRP-strengthened concrete beams.The following conclusions can be drawn: The effectiveness of FRP strengthening to shear contribution, is dependent on the amount of internal shear reinforcement. It appears that the composites are less effective when beams are heavily reinforced with internal shear reinforcement. The plane section does not remain plane in the shear span after a certain load level is reached, but the external FRP sheets delay the loss of plane section behavior. The shear forces carried by arching action are also delayed when FRP is used. The remaining beam action at ultimate, with significant shear reinforcement by either internal steel stirrups or external FRP sheets, accounts for about 20 % of the total shear force. The failure mode of the beams reinforced by continuous uniaxial glass fiber was by vertical tearing (unzipping) of the fibers close to the support. Triaxial glass-fiber reinforcement provided the beam with more ductile failure than did unidirectional glass fibers or unidirectional carbon fibers with a 50 mm gap.
Reinforced concrete T-beams strengthened in shear with fiber reinforced polymer sheets
Erhöhung der Scherfestigkeit von verstärkten Beton-Doppel-T-Trägern mit faserverstärkten Kunststoffplatten
Deniaud, C. (author) / Cheng, J.J.R. (author)
Journal of Composites for Construction ; 7 ; 302-310
2003
9 Seiten, 13 Bilder, 6 Tabellen, 22 Quellen
Article (Journal)
English
Reinforced Concrete T-Beams Strengthened in Shear with Fiber Reinforced Polymer Sheets
| Online Contents | 2003
Reinforced Concrete T-Beams Strengthened in Shear with Fiber Reinforced Polymer Sheets
| British Library Online Contents | 2003
Simplified Shear Design Method for Concrete Beams Strengthened with Fiber Reinforced Polymer Sheets
| British Library Online Contents | 2004
Simplified Shear Design Method for Concrete Beams Strengthened with Fiber Reinforced Polymer Sheets
| Online Contents | 2004