*Acoustic Emission - New Perspectives and Applications*

to the longitudinal reinforcement ratio. As the longitudinal reinforcement ratio changes from 0.33, 0.52, and 1.1%, the mid-span deflection decrease in both steel and well as GFRP reinforced concrete beams. For example, in the case of steelreinforced concrete beams, increasing the longitudinal reinforcement ratio changes from 0.33, 0.52, and 1.1% decreases the mid-span deflection by 53.15, 42.59, and 31.42 mm. On the other hand in the case of GFRP reinforced concrete beams decreases by 65.14, 55.52, and 34.43 mm. Hence, the overall comparison of steel and GFRP reinforced beams under static flexural loading is widely different. GFRP-RC beams exhibit higher deflections and lower crack widths in comparison to steel reinforced beams at the same reinforcement ratios (**Figure 8** and **Table 4**). The deflections are 22.55, 30.35, and 9.57% higher in G-0.33-1, G-0.33-1, and G-1.11-1 RC beams in comparison to S-0.33-1, S-0.52-1, and S-1.11-1 RC beams. This is because of the low elastic modulus of GFRP bars as compared to steel bars.

**Figure 8.** *Variation in average maximum mid-span deflection Vs 'ρ'.*


### **Table 4.**

*Moment capacities of steel and GFRP reinforced beams.*

*Crack Classification in Steel-RC and GFRP-RC Beams with Varying Reinforcement Ratio Using… DOI: http://dx.doi.org/10.5772/intechopen.101305*
