Free Vibration of a Single-Edge Cracked RC Beam Strengthened with FRP
Publication: Journal of Engineering Mechanics
Volume 140, Issue 6
Abstract
The equations of motion and corresponding boundary conditions for the vibration of a single-edge cracked RC beam strengthened with fiber-reinforced polymer (FRP) have been developed by applying the Hamilton principle, where the stress concentration near the crack is taken into account by introducing a crack disturbance function into the beam’s compatibility relations. The solution employs the Galerkin method. A parametric study is carried out to investigate the influence of the crack geometry parameter, in which the steel bar’s restraints, as well as FRP reinforcement on the dynamic behavior of the RC beam, are considered. It is shown that calculating the dynamic characteristics of a single-edge cracked RC beam strengthened with FRP must take into account the effect of the steel bar’s restraints and FRP reinforcement, simultaneously, whereas the crack geometry parameter has very little influence on the dynamic characteristics of the cracked beam. The crack position has little effect on the frequency of the RC beam and concrete beam.
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Acknowledgments
This work was supported financially by the Hunan Province University Key Laboratory of Bridge Engineering (Changsha University of Science & Technology) (13KC02).
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© 2014 American Society of Civil Engineers.
History
Received: Jan 9, 2013
Accepted: Nov 21, 2013
Published ahead of production: Nov 23, 2013
Published online: Jan 30, 2014
Published in print: Jun 1, 2014
Discussion open until: Jun 30, 2014
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