United States Department of Transportation
i
Residual Capacity of Impacted Bridge Piers
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2020-08-01
[PDF-1.56 MB]
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Corporate Contributors:Rutgers University. Center for Advanced Infrastructure and Transportation ; United States. Department of Transportation. Office of the Secretary for Research and Technology ; United States. Department of Transportation. Federal Highway Administration ; United States. Department of Transportation. University Transportation Centers (UTC) Program
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Edition:Final Report 12/15/2017 – 7/31/19
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Abstract:The FHWA has recently initiated research to determine the vulnerability of bridge piers subject to vehicular impact. Vehicular impact to bridge piers results in varying levels of damage and corresponding reduction in structural capacity. The extent of the damage determines the level of corrective maintenance required to keep the bridge in service or the decision to take the bridge off-line for pier replacement. The majority of the existing studies in this area have taken a risk management approach in an attempt to limit the number of accidental occurrences. The majority of approaches rely on the assignment of a damage level index to determine suitability for continued service. However, these approaches do not take into consideration the reduction in capacity and ability of the pier to withstand additional hazard loading conditions such as seismic. These sequential hazardous loading conditions are not currently considered in existing design codes and as such the analysis assumes that each member has its design capacity when it experiences the hazard loading. This study seeks to identify the reduction in capacity that bridge piers experience as a function of vehicular impact to develop reduction factors that can be used in the reliability analysis of subsequent, post impact, hazard analysis.
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