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Numerical Investigation of Creep Effects on FRP-Strengthened RC Beams |
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| Authors: | Kyoung-Kyu Choi Mahmoud M. Reda Taha Mark J. Masia Penelope L. Shrive Nigel G. Shrive |
| Affiliation: | 1Assistant Professor, School of Architecture, Soongsil Univ., Sangdo-dong, Dongjak-gu, Seoul 156-743, South Korea. 2Associate Professor and Regents’ Lecturer, Dept. of Civil Engineering, Centennial Engineering Center, Univ. of New Mexico, MSC01 1070, Albuquerque, NM 87131 (corresponding author). E-mail: mrtaha@unm.edu 3Senior Lecturer, Centre for Infrastructure Performance and Reliability, School of Engineering, Univ. of Newcastle, University Dr., Callaghan, NSW 2308, Australia. 4Structural Engineer, HalcrowYolles, Calgary, AB, Canada. 5Killam Memorial Research Chair, Dept. of Civil Engineering, Univ. of Calgary, Calgary, AB, Canada T2N 1N4. |
| Abstract: | Numerical analysis using a finite-element model was performed to simulate and investigate the long-term behavior of two RC beams with similar steel reinforcement, cast from the same batch of concrete. One beam was a plain RC beam and the other beam was strengthened using carbon fiber-reinforced polymer (FRP) strips. The deflections of both beams have been monitored for 5 years after loading. The finite-element model included both creep of concrete and viscoelasticity of the epoxy adhesive at the concrete-carbon FRP (CFRP) interface. The results of the finite-element analysis are compared to experimental observations of the two beams. The finite-element analysis was found to be able to simulate the long-term behavior of the CFRP-strengthened beam and help us understand the complex changes in the stress state that occur over time. |
| Keywords: | Reinforced concrete Epoxy Adhesives Finite element method Fiber reinforced polymer Creep Deflection Concrete beams |
