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Corrosion and strength behavior of prestressed tendons under different tensile stress and applied current

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Document pages: 7 pages

Abstract: Under high tensile stress, corrosion occurs faster, which will lead to some problems, such as the availability and structural performance degradation of PSC (prestressed concrete) structures. In this paper, the applied current method (ICM) is applied to the tendons bearing 0.0 , 20.0 , 40.0 and 60.0 tensile loads. Under tensile stress, the tendons were induced for 24 hours and 20 volts, resulting in load failure, and the ultimate load was evaluated by different corrosion behaviors. The mechanical behavior changes under the same corrosion conditions were evaluated under different initial prestress levels. With the increase of initial prestress load, corrosion occurs faster and the amount of corrosion increases linearly. The ultimate load is reduced accordinglyased with increasing initial prestressing and corrosion amount. The relationships between prestressing levels and corrosion behaviors were quantitatively obtained through regression analysis. The measured current during applied voltage and the related corrosion amounts were also dealt with in this work.

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