Dynamic Character of Reinforced Concrete Column with Corroded Stirrup

An Experimental testing program was undertaken using full-scale specimen of seven reinforced concrete columns, one of which was employed as control without corrosion, and the other six of which were corroded in different degree. The test results indicate that with the increase of the corrosion level, the failure mode change from flexural-shear failure ,due to crushing of core concrete, to flexural-shear failure, due to fracture of stirrup. Although corrosion of stirrup do not influence distinctly on the ultimate strength of the columns, the ultimate drift and plastic rotation capacities greatly decrease with increasing the corrosion level. Compared with the test results, a calculation value can be more accurately acquired from the proposed method predicting the shear strength, through which both the minimum residual area and average corrosion weigh loss of stirrup are both considered.