Recommendations for the use of precast deck panels at expansion joints
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2008-11-01
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Alternative Title:Development of simple bridge deck details at expansion joints
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Abstract:Prestressed concrete panels have been used by the bridge construction industry in the state of Texas for many
years to increase construction speed and improve safety and economy. At expansion joints, cast-in-place concrete
is used and requires temporary formwork and slows construction. In a previous TxDOT project (0-4418), a fullscale
bridge deck was constructed that included precast panels at a 0o skew. The results indicated that the precast
panel system provided adequate strength and reduced construction costs compared with the traditional cast-inplace
details at the expansion joint. In this investigation (TxDOT Project 0-5367) two areas not covered in
Project 0-4418 were studied: fatigue performance of bridge decks using precast panels at the expansion joints and
the use of precast panels at skewed expansion joints. Fatigue response of precast panels under loading at the
expansion joint in 0o skew bridges was excellent. Skewed precast panels at expansion joints were tested under
static and fatigue loads. Two skew angles were tested: 30o and 45o. Six specimens were constructed and
subjected to a total of eleven tests. Loads were applied at midspan of the skewed end of each specimen, and some
specimens were also loaded at joint between trapezoidal (skewed) panels and an adjacent rectangular panel. The
skewed panels performed well. Design recommendations for implementation of skewed panels were developed.
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