Abstract
A procedure for assessing stiffness variations due to damaging and retrofitting of reinforced concrete beams is presented in this paper. This procedure is based on modal analysis and testing. Two beams were subjected to cyclic loading at increasing load levels, in order to induce in them increasing cracking patterns. The beams were then retrofitted by externally bonded CFRP sheets. Modal tests were carried out after each loading-unloading cycle. A theoretical model was applied, in order to simulate the behaviour of the beams in each situation. This model is based on the concepts of Fracture Mechanics to evaluate the stiffness of cracked beam elements, with and without external strengthening. The theoretical results are in good agreement with the experimental ones. The research suggests that dynamic testing can be used to obtain useful information about the effectiveness of the strengthening system.
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© 2003 Springer-Verlag Wien
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Bonfiglioli, B., Pascale, G. (2003). Dynamic Behaviour and Modelling of RC Beams Retrofitted with CFRP Sheets. In: Davini, C., Viola, E. (eds) Problems in Structural Identification and Diagnostics: General Aspects and Applications. International Centre for Mechanical Sciences, vol 471. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2536-6_4
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DOI: https://doi.org/10.1007/978-3-7091-2536-6_4
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-20492-4
Online ISBN: 978-3-7091-2536-6
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