Connection of Simple-Span Precast Concrete Girders for Continuity (2004) / Chapter Skim
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Pages 48-52
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From page 48... ...
and was used to detail the bent-strand connections in this study. The bentstrand connection, designed using the proposed equations, had adequate capacity to resist positive moment.
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From page 49... ...
A tension tie at the top of the girders should improve performance because it seems that much higher compressive stresses were generated at the bottom of the diaphragm once continuity was established. This tension tie either can be a mechanical tie between the girder tops or it can be made by pouring the entire diaphragm and a portion of the slab in the negative moment region.
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From page 50... ...
Since the data suggest that these positive moments are not mitigated by the deck slab shrinkage as much as the models predict, the actual positive moments that develop may be worse than predicted. If the girders are allowed to age, much of the creep and shrinkage will occur before continuity is established.
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From page 51... ...
Seismic events tend to overstress the entire bridge and, particularly, the connections. For the sake of this discussion on the seismic implications, three types of continuity connections are identified: • Type I: Continuity diaphragms with positive moment connections made of bent bars or bent strands and negative moment reinforcement in the composite deck or even in the continuity diaphragm.
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From page 52... ...
Effect of vertical ground motion on the vibration of the superstructure and the continuity diaphragm also need to be studied. Finally, in this study, no experimental work was done that was specifically related to seismic behavior, but the experimental work that was done does provide some relevant information that may be applicable to seismic design.
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