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Behavior of reinforced concrete beams strengthened with externally bonded hybrid carbon fiber-glass fiber sheets
Carbon fiber (CF) and glass fiber (GF) are two materials suitable for strengthening concrete structures. CF has a high strength and a high elastic modulus while GF has a relatively large elongation. However, the elastic modulus of GF is significantly lower than that of CF. When GF and CF work together the GF with a higher elongation will bear the extra load due to the fracture of CF retarding the progress of fracture of CFs, leading to a significant increase of average elongation and a bilinear 'ductile' stress-strain behavior. In the light of this a comparative test research program to strengthen RC beams by using hybrid CF and GF sheets was proposed. Test results indicated that H-CF/GF-RP strengthening can obtain both a significant increase of ductility and a remarkable decrease of strengthening cost with slight varieties in load carrying capacity and stiffness of strengthened beams. Under similar failure loads the deflection ductility, stiffness, and strengthening cost of H-CF/GF-RP strengthening beams were 89.7 % higher, 10 and 38 % lower than those of the CFRP strengthening beam; and under similar failure loads the deflection ductility of H-CF/GR-RP strengthening beams was only 16.2 % lower than that of the control beam.
Behavior of reinforced concrete beams strengthened with externally bonded hybrid carbon fiber-glass fiber sheets
Carbon fiber (CF) and glass fiber (GF) are two materials suitable for strengthening concrete structures. CF has a high strength and a high elastic modulus while GF has a relatively large elongation. However, the elastic modulus of GF is significantly lower than that of CF. When GF and CF work together the GF with a higher elongation will bear the extra load due to the fracture of CF retarding the progress of fracture of CFs, leading to a significant increase of average elongation and a bilinear 'ductile' stress-strain behavior. In the light of this a comparative test research program to strengthen RC beams by using hybrid CF and GF sheets was proposed. Test results indicated that H-CF/GF-RP strengthening can obtain both a significant increase of ductility and a remarkable decrease of strengthening cost with slight varieties in load carrying capacity and stiffness of strengthened beams. Under similar failure loads the deflection ductility, stiffness, and strengthening cost of H-CF/GF-RP strengthening beams were 89.7 % higher, 10 and 38 % lower than those of the CFRP strengthening beam; and under similar failure loads the deflection ductility of H-CF/GR-RP strengthening beams was only 16.2 % lower than that of the control beam.
Behavior of reinforced concrete beams strengthened with externally bonded hybrid carbon fiber-glass fiber sheets
Verhalten von mit äußerlich verbundenen, hybriden Carbonfaser-Glasfaser-Platten verstärkten Stahlbetonträgern
Xiong, G.J. (author) / Yang, J.Z. (author) / Ji, Z.B. (author)
Journal of Composites for Construction ; 8 ; 275-278
2004
4 Seiten, 3 Bilder, 3 Tabellen, 5 Quellen
Article (Journal)
English
Träger (Bauwesen) , Stahlbeton , Verstärkung (Festigkeit) , Laminieren (Mehrschichtstoff) , glasfaserverstärkter Kunststoff , carbonfaserverstärkter Kunststoff , Hybridverbundwerkstoff , Systemvergleich , Duktilität , Klebverbindung , Retrofitting , Platte (Bauteil) , Steifigkeit , Kosteneinsparung , mechanische Eigenschaft
| British Library Online Contents | 2004
Mechanical Behavior of Reinforced Concrete Beams Externally Strengthened with Carbon Fiber Sheets
| British Library Conference Proceedings | 2011
| British Library Conference Proceedings | 2003