United States Department of Transportation
i
Load Rating of Bridge LOG-47-1184: Engineering Research Services 2017-2020 Task 5
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2019-10-01
[PDF-1.08 MB]
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Alternative Title:Load Rating of Bridge LOG-47-1184: Division of Engineering ROC, Task 5 [Title from Cover]
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Edition:Final Technical Report
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Abstract:Bridge LOG-47-1184, a four-lane concrete highway bridge, was instrumented and subjected to controlled vehicle load testing in May 2019. The load response data collected were used to generate load Rating Factors (RFs) via a three-dimensional finite element model (FEM) created using ABAQUS, which were compared to those generated by MIDAS/Civil software, and those from the original BrR analysis by the Ohio Department of Transportation (ODOT) following the AASHTO method. The RFs from the FEM were higher than those from MIDAS/Civil which were higher than those from the original BrR method. The ratios of the BrR RFs to the other methods were generally constant over several test truck load configurations, with less than 4% variation for BrR/MIDAS and about 25% for BrR/ABAQUS. This suggests that considerably higher RFs can be used than those generated by the conservative BrR method, however these conclusions apply to this specific bridge and the corresponding ratios determined for other concrete slab bridges may differ.
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