Prediction of IC debonding failure of precracked FRP strengthened RC beams using global energy balance

Prediction of IC debonding failure of precracked FRP strengthened RC beams using global energy... Reinforced concrete (RC) beams strengthened with fiber reinforced polymer (FRP) have been extensively investigated, but the failure load of precracked beams strengthened with FRP has not been fully studied yet. When structurally deficient RC beams are repaired or strengthened using FRP, flexural cracks due to service load usually appear on the beams. Strengthened beams with precracking have been rarely examined, and most existing methods for predicting premature failures ignore the precracking effect. This research proposes a method for predicting debonding failure induced by intermediate crack (IC) for FRP-strengthened beams with precracking. The method consists of a numerical study on structurally damaged RC beams retrofitted with FRP laminate in the tension side of the beam. The method also applies the global energy balance approach in combination with fracture mechanics criteria to predict failure load for complicated IC-induced failure. The simulated results are validated against published experimental data and show good correlation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Materials and Structures Springer Journals

Prediction of IC debonding failure of precracked FRP strengthened RC beams using global energy balance

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Publisher
Springer Netherlands
Copyright
Copyright © 2017 by RILEM
Subject
Engineering; Structural Mechanics; Materials Science, general; Theoretical and Applied Mechanics; Operating Procedures, Materials Treatment; Civil Engineering; Building Materials
ISSN
1359-5997
eISSN
1871-6873
D.O.I.
10.1617/s11527-017-1077-8
Publisher site
See Article on Publisher Site

Abstract

Reinforced concrete (RC) beams strengthened with fiber reinforced polymer (FRP) have been extensively investigated, but the failure load of precracked beams strengthened with FRP has not been fully studied yet. When structurally deficient RC beams are repaired or strengthened using FRP, flexural cracks due to service load usually appear on the beams. Strengthened beams with precracking have been rarely examined, and most existing methods for predicting premature failures ignore the precracking effect. This research proposes a method for predicting debonding failure induced by intermediate crack (IC) for FRP-strengthened beams with precracking. The method consists of a numerical study on structurally damaged RC beams retrofitted with FRP laminate in the tension side of the beam. The method also applies the global energy balance approach in combination with fracture mechanics criteria to predict failure load for complicated IC-induced failure. The simulated results are validated against published experimental data and show good correlation.

Journal

Materials and StructuresSpringer Journals

Published: Aug 21, 2017

References

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