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A platform for research: civil engineering, architecture and urbanism
Use of carbon fibre textile to control premature failure of reinforced concrete beams strenghtened with bonded CFRP plates
Overhead presentation: The structural performances of Reinforced Concrete (RC) elements repaired with Externally Bonded Reinforcement (EBR) made of Carbon Fibre Reinforced Polymer (CFRP) plates is strongly influenced by the strengthening of their ends, which controls the premature end failure called peeling-off. This failure is occurring when the anchorage length of the plates or the shear span/depth ratio are low. Different techniques of end strengthening are studied. The most efficient is the use of carbon textile. Two aspects must be considered when the load-carrying capacity of RC elements externally strengthened with CFRP bonded plates is studied. A significant increase in the range of elastic behaviour, the stiffness, and the ultimate capacity is noticed compared to RC beam. Jointly tensile strains and ultimate deflection are greatly reduced. The externally bonded reinforcement modifies the cracking that is more diffuse, delaying the appearance of cracks and reducing their opening but in many situations the failure occurs prematurely by separation of the plate from the beam in one of the shear spans. This failure is called end peel or peeling-off failure. Three basic techniques were studied to enhance the load-carrying capacity of CFRP EBR beams by delaying end peel failure. All the three allow the development of a debonding failure mode rather than a concrete cover separation mode.
Use of carbon fibre textile to control premature failure of reinforced concrete beams strenghtened with bonded CFRP plates
Overhead presentation: The structural performances of Reinforced Concrete (RC) elements repaired with Externally Bonded Reinforcement (EBR) made of Carbon Fibre Reinforced Polymer (CFRP) plates is strongly influenced by the strengthening of their ends, which controls the premature end failure called peeling-off. This failure is occurring when the anchorage length of the plates or the shear span/depth ratio are low. Different techniques of end strengthening are studied. The most efficient is the use of carbon textile. Two aspects must be considered when the load-carrying capacity of RC elements externally strengthened with CFRP bonded plates is studied. A significant increase in the range of elastic behaviour, the stiffness, and the ultimate capacity is noticed compared to RC beam. Jointly tensile strains and ultimate deflection are greatly reduced. The externally bonded reinforcement modifies the cracking that is more diffuse, delaying the appearance of cracks and reducing their opening but in many situations the failure occurs prematurely by separation of the plate from the beam in one of the shear spans. This failure is called end peel or peeling-off failure. Three basic techniques were studied to enhance the load-carrying capacity of CFRP EBR beams by delaying end peel failure. All the three allow the development of a debonding failure mode rather than a concrete cover separation mode.
Use of carbon fibre textile to control premature failure of reinforced concrete beams strenghtened with bonded CFRP plates
Verwendung von Kohlenstofffasertextilien für die Reparatur von mit geklebten Verbundwerkstoffplatten verstärkten Betonträgern
Buyle-Bodin, F. (author) / David, E. (author)
2003
38 Seiten, 25 Bilder, 2 Tabellen, 21 Quellen
Conference paper
Storage medium
English
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