This paper studies the effects of the behavior of normal strength rectangular concrete (NSC) columns confined by carbon fiber-reinforced polymer (CFRP) sheets. Six reinforced concrete columns with dimensions (100mmx100mmx900mm) have been cast and tested. These specimens were subjected to pure axial compressive loading up to failure. Included in the study is the influence of three parameters. Those parameters are the CFRP distribution (5 strips and full wrapping), column slenderness ratio (40, 30), and steel reinforcement ratio (ρ = 0.0113, 0.0314, 0.0678). Those results show a high enhancement in the columns’ load capacity for the first cracking load and the ultimate load for all of the columns.

This paper studies the effects of the behavior of normal strength square concrete (NSC) columns confined by carbon fiber-reinforced polymer (CFRP) sheets. Six reinforced concrete columns of dimensions (100mmx100mmx1200mm) have been casted and tested, those samples have been subjected to uniaxial compression load (eccentricity=0.5b) up to failure. Included the study the impact of three parameters which are the CFRP distribution (5 strips and fully wrapping), column slenderness ratio (40, 30) and steel reinforcement ratio (ρ= 0.0113, 0.0314, 0.0678). Those results showed high improvements in the columns’ load capacity of cracking and ultimate load for all the columns.

The present work deals with the analysis of experimental results, obtained from the tests on circular reinforced concrete (RC) columns, confinement with external sheets of carbon fiber reinforced polymer (CFRP). Two parameters was studied including the number of CFRP wrap strips and steel ratio of the columns (, and). Six circular RC columns with scale (100×900 mm) were exposed to pure axial compression load up to failure. Crack and failure load was recorded to estimate the loaddisplacement behavior, ultimate strength, and ductility of the specimens. The results show clearly that wrapping with (CFRP) can improve the structural performance of the RC columns by providing greater load carrying capacity and ductility than the unwrapped RC columns. The effects of test parameters are evidenced and compared.