| Title |
Flexural Strengthening Design of RC Beams Strengthened with FRP |
| Authors |
Ahn Sang-Ho ; Lee Sang-Ho |
| Keywords |
flexural strengthening design ; FRP ; failure mode ; analysis |
| Abstract |
It is now common practice to retrofit or rehabilitation existing reinforced concrete beams by adhesively bonding fiber reinforced polymer or metal plates to their surface. Researchers are working towards introducing its design procedures to standard codes of practice. This paper presents an analytical study on the flexural behavior of reinforced concrete beams strengthened with FRP. Different failure modes of these strengthened reinforced beams have been reported and these failure modes are generally referred to as brittle failure or ductile failure involving the compression crushing of the concrete, debonding or rupture of the FRP and yielding of the steel reinforcement. For the analysis, the stresses and strains of all the components of the beam are related by the material properties, including the stress-strain curves for the concrete, steel and FRP. In this study, an efficient computational analysis to predict the nominal moment capacity of reinforced concrete beams strengthened with FRP is presented. For design purpose, the upper and lower limits of FRP cross-section areas are established to ensure that reinforced concrete beam strengthened with FRP will fail in a ductile manner. A comparison between the analytical results and the data obtained from the literature has been made and the agreement is very good. |