Investigation of corrosion products on the performance of concrete columns under axial and cyclic lateral loads

Document Type : Original Article

Authors

1 Civil engineering department. Islamic Azad University, Bushehr, Iran

2 Civil engineering department. Islamic Aza University, Bushehr. Iran

3 Civil engineering department, Islamic Azad University, Bushehr, Iran

Abstract

Corrosion is the deterioration process of a material caused by a chemical reaction with its ‎environment. Corrosion of reinforcement in concrete structures is a global problem that causes a ‎range of problems in reinforced concrete structures. In order to determine, which corrosion ‎product has the greatest impact on the durability and force-displacement diagram of the ‎structure, several concrete column specimens with reduced reinforcement cross-sectional area, ‎reduced reinforcement yield strength, and reduced concrete compressive strength resulting from ‎reinforcement corrosion were examined under cyclic and vertical lateral loads simultaneously, ‎and the results were evaluated at the end. Finally, it was found that at 9%, 16%, 22%, and 54% ‎corrosion in the presence of simultaneous axial and lateral cyclic loads, the effectiveness of ‎reducing the cross-sectional area of the reinforcement was greater and caused significant ‎changes in the force-displacement diagrams. The importance of reinforcement in the load ‎transfer and durability of reinforced concrete columns means that any change in their mechanical ‎properties due to corrosion can have serious and critical effects on the overall performance of the ‎structure. This phenomenon can have serious consequences on the performance of structures, ‎because in addition to a significant reduction in strength and load-bearing capacity, it may also ‎lead to changes in the dynamic behavior and buckling of structures.‎

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