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A platform for research: civil engineering, architecture and urbanism
Peeling Prevention in Strengthened RC Beams Using End Cover Replacement
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.
Peeling Prevention in Strengthened RC Beams Using End Cover Replacement
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.
Peeling Prevention in Strengthened RC Beams Using End Cover Replacement
El-Emam, Hesham M. (author) / Salim, Hani A. (author) / Badawy, Amal (author) / Sallam, Hossam E. M. (author)
Structures Congress 2018 ; 2018 ; Fort Worth, Texas
Structures Congress 2018 ; 317-325
2018-04-17
Conference paper
Electronic Resource
English
Peeling Prevention in Strengthened RC Beams Using End Cover Replacement
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