3. RC beams strengthened with EB CFRP sheets failed due
to debonding of CFRP sheets and flexure failure as expected.
No crushing concrete occurring at ultimate load.
4. Increasing a layer of CFRP sheet dose not insignificantly
enhance further a RC beam under flexure stress.
5. The strengthening of RC beam with FRP has enhanced
the stiffness and reduces the crack width of the beam. The
percentage of stiffness increase is 55% to 85% for beam
strengthened with NSM GFRP bars, and 26% to 38% for beam
strengthened with EB CFRP sheets.
6. Based on the result, it has been also shown that the
strengthened beam with more than one numbers of GFRP bar
and CFRP sheet reduces significantly the deflection of the
beams at ultimate load and the crack width due to higher
stiffness provided by FRP.
For the flexural strengthening of RC structures, the NSM
technique was the most effective and suitable technique to
enhance the flexural capacity of RC beams compare to EB
technique. In the other hand, the use of NSM technique is
feasible, easy and faster to apply, and have good anchored.
However, both techniques can be used to increase stiffness,
ultimate load capacity and flexural strength of RC beams and
reduces the deflection of RC beams at ultimate loads.