Effect of Corrosion Damage on the Ductility Performance of Concrete Columns

K Suguna,P.N Raghunath,J Revathy

doi:10.3844/ajeassp.2009.324.327

Abstract

Problem statement: An experimental investigation was carried out on reinforced concrete columns with corroding reinforcement to assess the residual strength and ductility performance of columns. Approach: An accelerated corrosion regime of different degrees of corrosion damage of 10 and 25% were induced in the steel reinforcement of concrete columns. The columns were then tested under uni-axial compression until failure. Results: The results showed a marked reduction in axial strength and ductility of the corroded concrete columns. Conclusion/Recommendations: The increase in corrosion intensity decreased the axial load carrying capacity of the columns and hence reduction in ductility of the corroded columns.

Highlights

Corrosion of reinforcing steel is widely accepted as the primary cause of premature deterioration in Reinforced Concrete (RC) structures
He reported that the bearing capacities of corroded columns was not caused by reductions in strength or effective areas of the reinforcing bars and by cracks formed during the corrosion process
The present study is focused on the residual strength and ductility of reinforced concrete columns that were subjected to different degrees of corrosion damage

Summary

INTRODUCTION

Corrosion of reinforcing steel is widely accepted as the primary cause of premature deterioration in Reinforced Concrete (RC) structures. The past research addressed on the flexural behavior of corrosion damaged concrete members[5,7,8] They indicated that load carrying capacity and ductility decreased as the reinforcing steel bars were corroded. Uornoto[12] studied the effects of corrosion damage on the load bearing capacity of reinforced concrete columns. Research significance: For assessing the condition of corrosion-damaged structures, the remaining service life of such structures is to be estimated For this purpose, the effects of maintenance and repair options on their service life are to be determined. The effects of maintenance and repair options on their service life are to be determined To meet this objective, the present study is focused on the residual strength and ductility of reinforced concrete columns that were subjected to different degrees of corrosion damage.

MATERIALS AND METHODS

RESULTS

CONCLUSION