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Structural Engineering and Mechanics Volume 30, Number 4, November10 2008 , pages 403-426 DOI: https://doi.org/10.12989/sem.2008.30.4.403 |
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Flexural ductility of reinforced HSC beams strengthened with CFRP sheets |
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Seyed Hamid Hashemi, Ali Akbar Maghsoudi and Reza Rahgozar
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| Abstract | ||
| Externally bonding fiber reinforced polymer (FRP) sheets with an epoxy resin is an effective technique for strengthening and repairing reinforced concrete (RC) beams under flexural loads. Their resistance to electro-chemical corrosion, high strength-to-weight ratio, larger creep strain, fatigue resistance, and nonmagnetic and nonmetallic properties make carbon fiber reinforced polymer (CFRP) composites a viable alternative to bonding of steel plates in repair and rehabilitation of RC structures. The objective of this investigation is to study the effectiveness of CFRP sheets on ductility and flexural strength of reinforced high strength concrete (HSC) beams. This objective is achieved by conducting the following tasks: (1) flexural four-point testing of reinforced HSC beams strengthened with different amounts of cross-ply of CFRP sheets with different amount of tensile reinforcement up to failure; (2) calculating the effect of different layouts of CFRP sheets on the flexural strength; (3) Evaluating the failure modes; (4) developing an analytical procedure based on compatibility of deformations and equilibrium of forces to calculate the flexural strength of reinforced HSC beams strengthened with CFRP composites; and (5) comparing the analytical calculations with experimental results. | ||
| Key Words | ||
| CFRP; beams; high strength concrete; ductility; tensile bars. | ||
| Address | ||
| Seyed Hamid Hashemi: Faculty of Engineering, Arak University, Shariati St., Farmandari Sq., Arak, P. O. Box 38139, Iran Ali Akbar Maghsoudi and Reza Rahgozar: Civil Engineering Department, Kerman University, Kerman, Iran | ||