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Computers and Concrete Volume 33, Number 2, February 2024 , pages 163-173 DOI: https://doi.org/10.12989/cac.2024.33.2.163 |
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Finite element modeling of reinforced concrete beams externally bonded with PET-FRP laminates |
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Rami A. Hawileh, Maha A. Assad, Jamal A. Abdalla and M. Z. Naser
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| Abstract | ||
| Fiber-reinforced polymers (FRP) have a proven strength enhancement capability when installed into Reinforced Concrete (RC) beams. The brittle failure of traditional FRP strengthening systems has attracted researchers to develop novel materials with improved strength and ductility properties. One such material is that known as polyethylene terephthalate (PET). This study presents a numerical investigation of the flexural behavior of reinforced concrete beams externally strengthened with PET-FRP systems. This material is distinguished by its large rupture strain, leading to an improvement in the ductility of the strengthened structural members compared to conventional FRPs. A three-dimensional (3-D) finite element (FE) model is developed in this study to predict the load-deflection response of a series of experimentally tested beams published in the literature. The numerical model incorporates constitutive material laws and bond-slip behavior between concrete and the strengthening system. Moreover, the validated model was applied in a parametric study to inspect the effect of concrete compressive strength, PET-FRP sheet length, and reinforcing steel bar diameter on the overall performance of concrete beams externally strengthened with PET-FRP. | ||
| Key Words | ||
| computational mechanics; concrete structures; externally bonded reinforcement; fiber reinforced plastic (FRP); finite elements method; non-linear analysis; reinforced concrete (RC) | ||
| Address | ||
| Rami A. Hawileh, Maha A. Assad and Jamal A. Abdalla: Department of Civil Engineering, American University of Sharjah, Sharjah, United Arab Emirates M. Z. Naser: School of Civil and Environmental Engineering & Earth Sciences, Clemson University, 312 Lowry Hall, Clemson, SC 29634 | ||