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Strength and ductility of concrete beams reinforced with carbon fiber-reinforced polymer plates and steel
Seven concrete beams reinforced internally with varying amounts of steel and externally with precured carbon fiber-reinforced polymer (FRP) plates applied after the concrete had cracked under service loads were tested under four-point bending. It has been shown that the application of carbon FRP plates is very effective for flexural strengthening of reinforced concrete beams, provided proper anchorage of the FRP plate is ensured. As the amount of steel reinforcement increases, the additional strength provided by the carbon FRP external reinforcement decreases. Mechanical clamping or wrapping with FRP fabric, combined with adhesion, is effective in anchoring the precured FRP plates and increases the anchorage capacity above that expected for adhesive bond only. If proper anchorage is provided, such as by wrapping or clamping, the effective strain limit (or stress level) currently proposed informally for FRP reinforcement by ACI 440 is close to being achievable for this particular type of precured carbon FRP plates. For lightly (steel) reinforced beams, this design stress level in the FRP can add substantially and economically to the beam strength.
Strength and ductility of concrete beams reinforced with carbon fiber-reinforced polymer plates and steel
Seven concrete beams reinforced internally with varying amounts of steel and externally with precured carbon fiber-reinforced polymer (FRP) plates applied after the concrete had cracked under service loads were tested under four-point bending. It has been shown that the application of carbon FRP plates is very effective for flexural strengthening of reinforced concrete beams, provided proper anchorage of the FRP plate is ensured. As the amount of steel reinforcement increases, the additional strength provided by the carbon FRP external reinforcement decreases. Mechanical clamping or wrapping with FRP fabric, combined with adhesion, is effective in anchoring the precured FRP plates and increases the anchorage capacity above that expected for adhesive bond only. If proper anchorage is provided, such as by wrapping or clamping, the effective strain limit (or stress level) currently proposed informally for FRP reinforcement by ACI 440 is close to being achievable for this particular type of precured carbon FRP plates. For lightly (steel) reinforced beams, this design stress level in the FRP can add substantially and economically to the beam strength.
Strength and ductility of concrete beams reinforced with carbon fiber-reinforced polymer plates and steel
Festigkeit und Duktilität von mit carbonfaserverstärkten Kunststoffplatten und Stahl verstärkten Betonträgern
Duthinh, Dat (author) / Starnes, Monica (author)
Journal of Composites for Construction ; 8 ; 59-69
2004
11 Seiten, 16 Bilder, 4 Tabellen, 19 Quellen
Article (Journal)
English
Stahlbeton , Träger (Bauwesen) , Verstärkung (Festigkeit) , Platte (Bauteil) , carbonfaserverstärkter Kunststoff , Biegefestigkeit , Duktilität , Verankerung (mechanische Befestigung) , Klebverbindung , kombiniertes Verfahren , Retrofitting , statische Prüfung , Ummantelung , Klemmverbindung , Festigkeitserhöhung
| British Library Online Contents | 2004
Strength and Ductility of Reinforced Concrete Beams Externally Reinforced with Carbon Fiber Fabric
| Online Contents | 2002
Ductility Demand of Compression Yielding Fiber-Reinforced Polymer- Reinforced Concrete Beams
| Online Contents | 2008