Issue 63

I. Harba et alii, Frattura ed Integrità Strutturale, 63 (2023) 190-205; DOI: 10.3221/IGF-ESIS.63.16

The influence of the load eccentricity on Ne/Nf. Where Nf define as numerical load capacity of unconfined columns specimens with the same eccentricity of load as Ne, can be used to further analyze the contribution of the CFRP confinement ratio. Fig. 10 depicts the comparing results. For the term Ne/Nf, the confinement efficiency can be simply determined. So that because a high value of ratio Ne/Nf indicates an augmentation of strength due to efficiency of CFRP confinement. Fig. 10 show that as load eccentricity increases the Ne/Nf value increases for most CFRP confined circular concrete specimens. However, increasing load eccentricity reduces confinement efficiency, which is understandable given the circular section's lower compressive area. Because the natural axis is so short, large eccentricities exhibit a stronger trend.

Figure 10: Values of Ne/Nf for each group

Figure 11: The load- longitudinal displacement curves for eccentrically loaded confined columns.

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