Corrosion effect on compatibility between prestressing strand and concrete

摘要

This present study investigated effects of the strain compatibility between strands and concreternon the flexural behavior of corroded post-tensioned beams. First, eight post-tensioned beams withrnbonded strand were designed and subjected to accelerated corrosion to different strand corrosionrndegrees, and the load deflection response and the ultimate strength were discussed based on thernflexural test. Next, a compatibility coefficient was introduced to quantify the inconsistentrncompatibility between corroded strand and concrete. The influence of strand corrosion on therncompatibility coefficient was discussed. Finally, an analytical model was proposed to predict thernultimate strength of the post-tensioned beams with corroded strand. The model was verified withrndifferent experimental results.