THEORETICAL INVESTIGATION ON FLEXURAL PERFORMANCE OF RC BEAMS STRENGTHENED EXTERNALLY BY CFRP | ||
| JES. Journal of Engineering Sciences | ||
| Article 5, Volume 40, No 1, January and February 2012, Pages 67-91 PDF (909.06 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.21608/jesaun.2012.112714 | ||
| Authors | ||
| Khairy Hassan Abdelkareem1; Fayez Kaiser Abdelseed1; Mohamed Omar Sayed2 | ||
| 1Professors, Civil Eng. Dept., Assiut University | ||
| 2Assistant Researcher, Construction Research Institute, National Water Research Center, Egypt | ||
| Abstract | ||
| In this paper an analytical model is presented for reinforced concrete beams externally reinforced with carbon fiber reinforced polymer (CFRP) laminates using finite element method adopted by ANSYS. The finite element models are developed using a smeared cracking approach for concrete and three dimensional layered elements for the CFRP composites. In particular, attaching unidirectional CFRP to the tension face of RC beams has provided an increase in the stiffness and load capacity of the structure. However, due to the brittle nature of unidirectional CFRP, the ductility of the beam decreases. Consequently, the safety of the structure is compromised, due to the reduction in ductility. The purpose of this research is to investigate the behavior of normal and high strength reinforced concrete beams strengthened with CFRP sheets. The major test parameters included the grade of concrete, the different dimensions of the beam and the tensile reinforcement ratio. Furthermore, change in the strength, ductility and toughness of the beams, as the grade of concrete, the dimensions of the beam and tensile reinforcement bar ratios are altered, are investigated. Fifty-four reinforced concrete beams were modeled and analyzed up to failure. | ||
| Keywords | ||
| Finite Element Model; CFRP; High Strength Concrete; Ductility; Strength; Toughness | ||
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