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A platform for research: civil engineering, architecture and urbanism
Environmental fatigue and static behavior of RC beams strengthened with carbon-fiber-reinforced polymer
The objective of the project reported here is to obtain data on the durability of CFRP-strengthened structures in environmentally challenging conditions. The paper presents the results of fatigue and quasi-static bending tests performed on RC beams after submitting them to severe exposure conditions. Twelve beams were externally reinforced with CFRP: six beams with a Sika CarboDur unidirectional plate, and six beams with Mitsubishi Replark sheets. The two strengthening systems were significantly different from each other. From the first cycle of loading, large strains were measured in the CarboDur reinforcement, whereas it took a certain level of concrete cracking before the Replark reinforcement would be activated. Local stiffness seemed to degrade more rapidly for the Replark-reinforced specimens. When all the beams were submitted to quasi-static loads up to failure, the Replark specimens exhibited higher deformability than did the CarboDur beams. The ultimate loads and deflections were not affected by the wet-dry or continuous immersion in water. However, the shear transfer mechanism at the CFRP-concrete interface at failure seemed to be influenced by the accelerated aging.
Environmental fatigue and static behavior of RC beams strengthened with carbon-fiber-reinforced polymer
The objective of the project reported here is to obtain data on the durability of CFRP-strengthened structures in environmentally challenging conditions. The paper presents the results of fatigue and quasi-static bending tests performed on RC beams after submitting them to severe exposure conditions. Twelve beams were externally reinforced with CFRP: six beams with a Sika CarboDur unidirectional plate, and six beams with Mitsubishi Replark sheets. The two strengthening systems were significantly different from each other. From the first cycle of loading, large strains were measured in the CarboDur reinforcement, whereas it took a certain level of concrete cracking before the Replark reinforcement would be activated. Local stiffness seemed to degrade more rapidly for the Replark-reinforced specimens. When all the beams were submitted to quasi-static loads up to failure, the Replark specimens exhibited higher deformability than did the CarboDur beams. The ultimate loads and deflections were not affected by the wet-dry or continuous immersion in water. However, the shear transfer mechanism at the CFRP-concrete interface at failure seemed to be influenced by the accelerated aging.
Environmental fatigue and static behavior of RC beams strengthened with carbon-fiber-reinforced polymer
Umweltbedingte Ermüdung und statisches Verhalten von mit carbonfaserverstärktem Kunststoff verstärkten Stahlbetonträgern
Gheorghiu, Catalin (author) / Labossiere, Pierre (author) / Raiche, Alexandre (author)
Journal of Composites for Construction ; 8 ; 211-218
2004
8 Seiten, 7 Bilder, 4 Tabellen, 10 Quellen
Article (Journal)
English
| British Library Online Contents | 2004
Fatigue behavior of reinforced concrete beams strengthened with prestressed fiber reinforced polymer
| Online Contents | 2012
Fatigue behavior of reinforced concrete beams strengthened with prestressed fiber reinforced polymer
| British Library Online Contents | 2012