Theoretical and field experimental evaluation of skewed modular slab bridges : [research summary].
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2012-12-01
By Fu, Chung C.
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Abstract:Adjacent precast, prestressed concrete multi-beam bridges have become more
prevalent due to their rapid construction time and cost effectiveness. Over the
years, various adjustments and refinements have been made to the design of
these bridges to reduce typical deteriorations, including shear key failure,
reflective cracking of the overlay, chloride penetration, and freeze/thaw damage.
Transverse post-tensioning is a common method that improves a bridge’s ability
to perform monolithically and reduces the amount of cracking in the overlay.
This method has been used with some success. However, longitudinal cracking
(possibly caused by insufficient and/or inadequate transverse connection
between the beams) has been discovered in the concrete overlays of some
skewed bridges that have been built within the past five years.
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