Destructive testing of twenty-year-old prestressed concrete bridge beams in freezing-thawing region

Anotace: The paper conducted a destructive test and nonlinear finite element analysis for four pieces of pre-stressed concrete hollow plate, which have served for 20 years in the freezing-thawing region. The results showed that typical bending destruction occurred in the test beams under the action of bending load, and the bearing capacity of the test beams decreased by a little compared with finite element analysis results. The test beams showed typical bending response before the reinforcement yielded under the action of uniform load, and the pre-stressed reinforcement in the bending-shearing zone slipped after reinforcement yielded, the final ultimate bearing capacity of the test beam was only 75% of the finite element calculation value.