Time-dependent deformation in segmental prestressed concrete bridges

A rational analytical procedure for estimating the time dependent behavior of segmental prestressed concrete bridges built by the cantilever method is presented. It is based on a step by step numerical procedure which attempts to account for most of the important parameters that influence the time dependent behavior of such structures, and the procedure was incorporated in a computer program. Computed strains were compared with Kishwaukee River Bridge at Rockford, Illinois. Good agreement between the two sets of values was obtained as long as the computations were based on the creep properties of samples of concrete from the bridge, for the particular case where the creep specimens were stored outdoors in the same environment that the structure experienced.