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Partially bonded near-surface-mounted CFRP bars for strengthened concrete T-beams by Han T. Choi; Jeffrey S. West; Khaled A. Soudki is a Engineering article available to read on EtoBox.

What is Partially bonded near-surface-mounted CFRP bars for strengthened concrete T-beams about?

A partially bonded strengthening approach for reinforced concrete (RC) beams utilizing near-surfacemounted (NSM) carbon fiber reinforced polymer (CFRP) bars was investigated with the specific objective of improving deformability. A total of six RC T-beams strengthened with NSM CFRP bars of various unbonded lengths were tested. Test results showed a decrease of the stiffness at the post-yield stage of the load-deflection response in the partially bonded beams. This is caused by the delayed increase of the FRP strain within the unbonded length. As a result the beam deformability was increased as the unbonded length increased at the same applied load. Internal slip of the FRP bar and gradual concrete failure were observed near the ultimate state, which caused a complicate nonlinear behavior of the beams. An analytical model is proposed to address the complete beam behavior including the effect of slip of FRP reinforcement and gradual concrete crushing. This model was developed based on the compatibility of deformation of the partially bonded system and was able to represent the ultimate behavior of the beams well.

Who reads Partially bonded near-surface-mounted CFRP bars for strengthened concrete T-beams?

Author

Han T. Choi; Jeffrey S. West; Khaled A. Soudki

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0950-0618)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)