Study of Elastomeric Bearings for Super-Elevated U-Beam Bridges
|The primary objective of this research was to determine the
best way to consider the effects of transverse
superelevation on uniform-height steel-reinforced elastomeric bearing pads for U-Beam bridges. Existing TxDOT
design provisions did not specifically account for the effects of the transverse superelevation. A nationwide survey
of Departments of Transportation (DOTs) revealed that the country was nearly evenly split on whether or not
superstructure elements such as U-Beams should be placed on a transverse superelevation. Specific modifications
to the AASHTO Method “A” design of elastomeric bearing equations were developed to account for the transverse
superelevation.The ability of the proposed modifications to predict actual behavior was evaluated by inspecting existing bridges and performing full-scale laboratory testing. Both the field inspections and the laboratory testing validated the need for the proposed revisions.
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William Randy Burkett Ph.D.