This paper deals with the prediction of behavior of composite girder bridges according to the placing sequences of concrete deck. Based on a degenerate kernel of creep compliance in the form of Dirichlet series, the time-dependent behaviors of bridges are simulated, and the layer approach is adopted to determine the equilibrium condition in a section. To verify the analytical results, field tests were performed for an actual bridge under construction in Korea. Based on both analytical and experimental results, it is concluded that the possibility of cracking at supports for continuous bridges with closed box girder sections is very little even if deck concrete is placed continuously from one end of bridge to the other end. The ultimate shrinkage strain recommended in the Specifications may be far below the actual drying shrinkage rate depending on the field conditions. Therefore, the effective control for the quality of deck concrete is more important than the placing sequences of concrete in order to reduce cracks occurring in the early stage. In addition, correlation studies are conducted with the objective to establish the validity of the continuous placing of concrete deck on the closed steel box-girder that is broadly used in practice.

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