Dynamic Behaviour and Modelling of RC Beams Retrofitted with CFRP Sheets

  • Barbara Bonfiglioli
  • Giovanni Pascale
Part of the International Centre for Mechanical Sciences book series (CISM, volume 471)


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.


Fibre Reinforce Polymer Reinforced Concrete Beam Stiffness Variation Compliance Matrix CFRP Sheet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Wien 2003

Authors and Affiliations

  • Barbara Bonfiglioli
    • 1
  • Giovanni Pascale
    • 1
  1. 1.DISTART — University of BolognaBolognaItaly

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