Abstract
This study aims to investigate the effect of using externally bonded carbon fiber reinforced polymer (CFRP) on the strengthening and rehabilitation of reinforced concrete (RC) T-beams reinforced with steel stirrups. Three configurations of CFRP were used: 45° inclined strips, horizontal straight strips, and U-wrapped sheets. A total of 19 specimens of strengthened and preloaded RC T-beams were experimentally tested. The experimental results were compared with the theoretical values determined according to the ACI 440.2R−17 code. The results proved that all beams containing CFRP recorded higher strength than the control sample, regardless of whether the beams were tested for strengthening or rehabilitation purposes. The horizontal straight strips of the CFRP schemes recorded the highest enhancement in the shear capacity, followed by the U-wrapped sheets and inclined strips. Moreover, the ACI 440.2R−17 code overestimated the capacities of some samples.
Highlights
If the neutral axis (NA) is in the flange, the beam will behave as a rectangular section, while if the NA is in the web, the beam will behave as a T-beam
The results proved that using carbon fiber reinforced polymer (CFRP) composites on pre-cracked T-beams increased their shear capacity when compared with control samples without any CFRP
The results clearly indicate that using externally bonded CFRP laminates and sheets in T-beams is effective in improving the shear capacity
Summary
Reinforced concrete (RC) structures are used extensively due to their ease of construction and materials availability. The deterioration of RC structures with time is an important dilemma to be considered in the design and the maintenance stages during its service life. Concrete slabs and beams are usually cast simultaneously, providing small edges at the top of beams that work with the beam compression zone. This type of beam is called a T-beam due to its shape. If the NA is in the flange, the beam will behave as a rectangular section, while if the NA is in the web, the beam will behave as a T-beam
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
