United States Department of Transportation
i
Infrastructure Inspection During and After Unexpected Events – Phase IV
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2021-12-01
[PDF-4.33 MB]
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Alternative Title:Infrastructure Inspection During and After Unexpected Events Fourth Year Final Report and Outcomes
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Edition:Final Report December 2020 – December 2021
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Abstract:This report compares the performance of a representative highway bridge with two different bearing systems under extreme flood events. A numerical model of the representative highway bridge with a conventional roller/rocker bearing system was compared to the same bridge model but with a newly integral abutment bearing system. Both scenarios were successfully modeled, and their outcomes clarify failure modes of common highway bridge systems against extreme flood conditions. The first and most important outcome of this study indicates that a bridge with an integral abutment system would tolerate much more severe flood intensity than the same bridge with a conventional bearing system. Secondly, the complicity of the failure mode for integral abutment indicates that there are several completely plastic spots/hinges rather than a single failure mode. Therefore, it seems that more research studies are required in order to categorize such bridge structural systems, which are classified based on their span lengths. The current research study was performed on a small-span representative bridge.
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