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Advanced bridge safety initiative, task 3 : slab bridge load rating using AASHTO methodology and finite element analysis - an analysis of 20 bridges.

File Language:
English


Filetype [PDF - 12.62 MB]

Details

  • Creators:
    Poulin, Timothy J. ; Davids, Bill
  • Corporate Creators:
    University of Maine
  • Subject/TRT Terms:
  • Publication/ Report Number:
    ME 14-07
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Maine
  • Corporate Publisher:
    Maine. Dept. of Transportation
  • Abstract:
    Current AASHTO provisions for the conventional load rating of flat slab bridges rely on the equivalent strip method ; of analysis for determining live load effects, this is generally regarded as overly conservative by many professional ; engineers. As a result there are a significant number of slab bridges in Maine that are (or will be) posted for reduced ; truck weights, when in reality such postings may not be necessary. ; In Tasks 1 and 2 of this study a program called SlabRate is developed and validated. SlabRate computes the rating ; factors for simply-supported, continuous flat slab bridges using finite element analysis (FEA). ; This report under Task 3 explores the potential benefits of using SlabRate over the conventional strip width, twenty ; existing bridges were load rated using both. Twenty one different truck configurations were analyzed, these include ; AASHTO’s design and legal trucks, along with AASHTO’s specialized hauling vehicles and MaineDOT’s rating ; trucks. ; It was also concluded that SlabRate can be reliably used to load rate flat slab bridges having skew angles of 20° or ; less. Only fourteen bridges of the original twenty bridges met this criteria, of which seven would have rating factors ; above one using SlabRate while below one using the conventional strip width method.
  • Format:
    PDF
  • Funding:
    20100506*5729
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/28482/dot_28482_DS1.pdf
  • File Type:
    Filetype[PDF - 12.62 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:f341e776968904124730335e3ea8045d1dab3c7910cd8b0a0cb2e45cb73bdaae
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