ABSTRACT
This paper investigates the flexural behavior of locally corroded post-tensioned concrete beams under strand fracture. The electrochemical accelerated corrosion method was conducted to obtain the local fracture of strand at different positions. Results shows that the prestressing force produced by secondary anchorage of broken strand and the flexural behavior of locally corroded beams are related to the fracture position of strand. Strand fractured in end anchorage region has little influence on the flexural behavior of locally corroded beams, and the prestressing force produced by secondary anchorage decreases less relative to the initial prestressing force. With the strand fracture positions moves to the mid-span region, the flexural behavior and the prestressing force decreases continuously. When strand fractured in mid-span region, the prestressing force is basically lost, and the flexural behavior of locally corroded beams will degenerate to be similar to that of RC beam.
