ABSTRACT
In bridges which had a tendon-like structural member, the corrosion is a main cause of deterioration of the structural resistance. For assessing the effect of corrosion in tendon, the transition of corroded section should be identified. For this purpose, strand samples were collected from prestressed concrete bridge site which had suffered the corrosion caused by chloride contamination. By utilizing camera and macro lens, corroded wire sections are scanned as pictures. Based on these pictures, the geometric properties of corroded wire sections such as pit angle and pit depth are analyzed. The corrosion of wire spreads rapidly with tangential direction at the early stage of corrosion. As the corrosion grows, the main direction of corrosion is changed to radial direction. Furthermore, the uncertainties of pit angle and maximum pit depth decrease as the corrosion of wire progresses. This research can help the modeling the corrosion in corroded wire under chloride contamination.
