Prestressed concrete railway bridges (PCR bridges) cross rivers, roads and railways. As many PCR bridges have been constructed, the problems of durability such as deterioration of concrete and reinforcing steel bars will come to the fore after this type of bridge has been in operation for a long time.
This paper describes the evaluation of the durability of 28 technically characteristic PCR bridges operated for more than 20 years. The author evaluated the degree of durability by visual observation using the durability point proposed by the author in accordance with the “Proposed recommendation on durability design for concrete structures” published by JSCE.