Corrosion occurs more rapidly under high tensile stress and this leads to several problems like degradation of serviceability and\nstructural performance in PSC (prestressed concrete) structures. In this paper, impressed current method, so-called ICM, was\napplied to tendons under tensile loadings of 0.0, 20.0, 40.0, and 60.0% of ultimate load.With induction of 20 volts for 24 hours to\ntendon under tensile stress, loading was induced to failure and the ultimate load was evaluated with varying corrosion behaviors.\nThechanging mechanical behaviors in the same corrosive conditions were evaluated under different initial prestressing levels.With\nincreasing initial prestressing load, corrosion occurredmore rapidly and corrosion amount also increased linearly.The ultimate load\naccordingly decreased with increasing initial prestressing and corrosion amount. The relationships between prestressing levels and\ncorrosion behaviors were quantitatively obtained through regression analysis.Themeasured current during applied voltage and the\nrelated corrosion amounts were also dealt with in this work.
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