Connection of Simple-Span Precast Concrete Girders for Continuity (2004) / Chapter Skim
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Pages 53-56
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From page 53... ...
• In all but one case, negative moment continuity was established by the use of a reinforced concrete deck slab. • Positive moment connections are used with the continuous-for-live-load bridges to control positive moments caused by creep and shrinkage of the precast girders.
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From page 54... ...
For a particular bridge, the predicted development of this negative moment depends on a number of factors, such as the creep and shrinkage properties of the girder and slab, the amount of prestressing force, the dead load, and the span length. In this project, the analytical models predicted that a negative moment should have formed for full-size Specimen 1 and that there should have been a gradual downward deflection of the girders and a decrease in the end reactions.
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From page 55... ...
The proposed specifications discuss the effect of girder age on the analysis and on the formation of positive time-dependent moments.
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From page 56... ...
Limited testing to verify positive moment connection capacity for other shapes may be advisable. This experimental program tested only a single beam line as a full-size specimen.
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