Experimental Study of Deformation Processes in Reinforced Concrete Beams Strengthened with a Carbon Fiber Sheet
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In practical terms, repair and strengthening of reinforced concrete structures with composite materials is an issue of great importance. However, how this strengthening affects the strength of reinforced structures has not been adequately justified. The specific features of the deformation behavior of strengthened structures are mainly determined by the debonding of the composite from the concrete surface. Experimental data describing the debonding process are practically absent. This paper presents the results of experimental studies of deformation processes taking place in bending reinforced beams strengthened with carbon fiber sheets. A thermography technique was used to detect the debonding in the examined structures. The results obtained made it possible to evaluate the effect of the strengthening of carbon fiber sheets on the deformation process and bearing capacity of reinforced concrete beams.
KeywordsFRP RC beams Strengthening IC debonding Infrared thermography
This research was supported by the Russian Science Foundation, project No. 14-29-00172.
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