This research deals with RC beams strengthened with FRP. An experimental research is presented which is aimed at evaluating the capability of an experimental modal analysis to assess the stiffness decrease due to damage, as well as the stiffness recovery due to strengthening. Ten beams were tested. All of them were subjected to loading cycles with increasing load levels in order to induce cracking of different severity in them. The beams were then retrofitted by externally bonded FRP sheets. Three types of composites were used. The number of layers was varied, too. Modal tests were carried out after each loading-unloading cycle. The modal frequencies and damping ratios were determined for the first four vibration modes. The results obtained indicate that an experimental modal analysis can give useful information on the severity of damage and the effectiveness of strengthening.

Pascale G., Bonfiglioli B. (2006). Dynamic assessment of reinforced concrete beams repaired with externally bonded FRP sheets. MECHANICS OF COMPOSITE MATERIALS, 42, 1-12.

Dynamic assessment of reinforced concrete beams repaired with externally bonded FRP sheets

PASCALE GUIDOTTI MAGNANI, GIOVANNI;BONFIGLIOLI, BARBARA
2006

Abstract

This research deals with RC beams strengthened with FRP. An experimental research is presented which is aimed at evaluating the capability of an experimental modal analysis to assess the stiffness decrease due to damage, as well as the stiffness recovery due to strengthening. Ten beams were tested. All of them were subjected to loading cycles with increasing load levels in order to induce cracking of different severity in them. The beams were then retrofitted by externally bonded FRP sheets. Three types of composites were used. The number of layers was varied, too. Modal tests were carried out after each loading-unloading cycle. The modal frequencies and damping ratios were determined for the first four vibration modes. The results obtained indicate that an experimental modal analysis can give useful information on the severity of damage and the effectiveness of strengthening.
2006
Pascale G., Bonfiglioli B. (2006). Dynamic assessment of reinforced concrete beams repaired with externally bonded FRP sheets. MECHANICS OF COMPOSITE MATERIALS, 42, 1-12.
Pascale G.; Bonfiglioli B.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/44488
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