Experimental investigation on residual shear strength of short-span reinforced concrete beams with corroded stirrups

Abstract

This paper reports an experimental investigation on the residual shear strength of the corrodeị d RC beams with stirrups having different levels of corrosion. A total of ten beams was tested, including four beams were subjected to an electrochemically accelerated aging technique for 60 and 80 days to obtain the theoretical mass loss in their stirrups of 10% and 20%, respectively. The objective of the test program was to investigate the shear performances of strengthened beams loaded up to failure, including load-deflection behaviour, crack patterns, ultimate capacities, and modes of failure. Compared to the un-corroded specimens, the average shear strength of corroded specimens decreased by 16.08% and 25.34%, corresponding to the degree of corrosion of 12.3% and 23.6%.