Flexural and shear strengthenings of RC beams using carbon fiber reinforced polymer laminates

Document Type

Conference Proceeding

Publication Date

2-1-2003

Abstract

This paper explores both flexural and shear behavior of carbon fiber-reinforced polymer (CFRP) strengthened reinforced concrete (RC) beams. For flexural strengthening of RC beams, a total of ten large-scale beams were tested to failure under monotonic and cyclic loads. The beams were originally designed as either under-reinforced or almost over-reinforced concrete beams. The present experimental results show that externally bonded CFRP strips to the tension face of the beam is an effective technique for repair and retrofit of RC beams under various loads. This study also shows that ductility of CFRP strengthened beams, in particular for a shorter beam, is adequate if the beam is properly designed and the CFRP strips are properly anchored. Five RC beams without shear reinforcement were also cast for studying shear strengthening of RC beams. Results of test demonstrate the feasibility of using externally applied, epoxy-bonded CFRP system to restore or increase the shear capacity of RC beams. The CFRP system can significantly increase the serviceability, ductility, and ultimate shear strength of a concrete beam, thus restoring beam shear strength using CFRP is also a highly effective technique. An analysis and design method for shear strengthening of externally bonded CFRP has been proposed as well.

Identifier

67651217563 (Scopus)

ISBN

[9780870311086]

Publication Title

American Concrete Institute ACI Special Publication

ISSN

01932527

First Page

89

Last Page

113

Volume

SP-211

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