Abstract
An experimental study on nine circular reinforced concrete (RC) columns is presented in this paper, wherein one column specimen was adopted as the reference group, the other eight specimens were subjected to accelerated corrosion. After the accelerated corrosion for 180 days, two of the corroded columns were protected by impressed current cathodic protection (ICCP), while the other six corroded columns were further repaired by structural strengthening (SS). A combination of ICCP and SS, namely ICCP-SS, is adopted in this study, which adopts the carbon-fabric reinforced cementitious matrix (C-FRCM) as anode and strengthening material. Finally, specimens were cyclically loaded in a horizontal direction under different axial loads. The results indicated load-carrying and energy dissipation capacities of specimens were deteriorated due to corrosion. This phenomenon is severer under higher axial load. The dual function of ICCP-SS technique does not only improve load-carrying and energy dissipation capacities of RC columns, but also reduce the on-going corrosion of steel re-bars. These benefits can be attributed to the confinement effect to the column base provided by the C-FRCM composites and the ICCP effect using carbon fabric mesh in the C-FRCM composites as anode.
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