United States Department of Transportation
i
Evaluating the Potential Benefits of Implementing AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical and System Redundant Members
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2024-03-01
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[PDF-78.19 MB]
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Edition:Final Report
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Abstract:An exploratory study was conducted for some bridges in the state of Indiana that evaluated the implementation potential of the AASHTO Guide Specifications for Internal Redundancy of Mechanically-Fastened Built-Up Steel Members (IRM Guide Specification) and the AASHTO Guide Specifications for the Analysis and Identification of Fracture Critical Members and System Redundant Members (SRM Guide Specification). The outcomes for the project included (1) determining if the application of the Guide Specifications on a wider scale would be beneficial to INDOT; (2) identifying which bridges or members were “truly” non-redundant in the selected bridges, thus allowing a more targeted inspection program that would minimize the risk associated with member failures; (3) developing a more targeted inspection program for the bridges eligible to be classified as IRMs and SRMs, and (4) proposing a strategy to move forward with a state-wide implementation plan to analyze other bridges presently classified as having NSTMs. This report addresses the bridge selection process used in determining the list of structures in the state of Indiana for IRM and SRM evaluation, as well as a detailed description of the IRM and SRM evaluation processes.
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