Mechanical properties of corroded rebar in deteriorated reinforced concrete members

摘要

In this paper, the mechanical properties of corroded rebars in deteriorated reinforced concrete structures were investigated. Since reinforcing bars in concrete members bear tensile forces, their corrosion greatly damages the load-bearing capacity of reinforced concrete members. This study aims to investigate changes in the mechanical properties of deformed reinforcing bars of different types and sizes when they were subjected to salt spray testing. As a reinforcing bar is corroded and the cross-sectional area is reduced, the yield point linearly decreases. The rate of such reduction is common to all types, being independent of the strength and diameter of the bar. The apparent Young's modulus linearly decreases as corrosion proceeds. The rate of such reduction is common to all types, being independent of the strength and diameter of the bar.