Experimental study on the behavior of eccentrically compressed corrosion-damaged reinforced concrete columns

Abstract

This paper presents an experimental study of corrosion-damaged reinforced concrete (RC) columns under eccentric compression. Three RC concrete column specimens, identical in geometry, reinforcing steel bars, and
concrete mix, were fabricated. One undamaged control specimen served as the control group, while the other
two column specimens underwent corrosion due to chloride ion exposure. All specimens were subjected to a
minor eccentric compressive load. The test results have revealed the behavior of RC columns damaged by steel
corrosion. Additionally, a comparison of the load-bearing capacity of corrosion-damaged RC columns was
conducted between calculation and experiment. The results indicate a close alignment between calculated and
experimental outcomes. Furthermore, the degree of decrease in the load-bearing capacity of corrosion-damaged RC columns over time was evaluated based on the axial load-moment interaction diagram. This evaluation considered the influence of the reduction in concrete strength and the cross-sectional area of the reinforcement.