Structures Congress 2018
Peeling Prevention in Strengthened RC Beams Using End Cover Replacement
Publication: Structures Congress 2018: Buildings and Disaster Management
ABSTRACT
End cover separation and shear crack debonding are the two most critical modes of failure in RC beams retrofitted with steel plates or carbon fiber reinforced polymer (CFRP) composite plates due to the brittle nature of the failures. In this paper, a 3D finite element analysis was used to simulate the peeling failure of strengthened beams using either smeared and/or discrete crack approaches. The effect of the thickness, stiffness, and length of the bonded plates and adhesive layer were investigated in this paper. Also, the effect of concrete cover replacement on the peeling failure was studied. Extending the CFRP plate length to 55% of the shear span enhanced the ultimate load capacity by over 200% compared to the un-strengthened beam. Further extension of the CFRP plate in the shear span had little effect on the flexural capacity of the beam. Beams with concrete cover replacement had higher ultimate load and deflection and bending stiffness than strengthened beams without cover replacement.
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Published In
Structures Congress 2018: Buildings and Disaster Management
Pages: 317 - 325
Editor: James Gregory Soules, 1CB&I
ISBN (Online): 978-0-7844-8132-5
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Apr 17, 2018
Published in print: Apr 17, 2018
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