Advanced bridge safety initiative : live load testing and load rating of the Evans Brook Bridge (#5506) and the Hastings Bridge (#5507) in Batchelders Grant, Maine.

Details

• Creators:
  Goslin, Keenan ; Davids, William
• Corporate Creators:
  University of Maine. Advanced Structures and Composites Center
• Subject/TRT Terms:
  Bridge Decks Bridges Girders Live Loads Load Tests Strain Measurement
• Publication/ Report Number:
  ME 14-11
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maine
• Corporate Publisher:
  Maine. Dept. of Transportation
• Abstract:
  The Advanced Structures and Composites Center at the University of Maine (UMaine) performed live load testing
  
  and rating factor analysis for two bridges (No. 5506 and No. 5507) in Batchelders Grant, Maine. The bridge load
  
  rating performed by consultants to the Maine Department of Transportation (DOT) indicated that the girders are not
  
  sufficient for carrying the legal loads for these bridges. Each bridge is built with four rolled steel girders (W36x170)
  
  with a variable depth concrete deck. Live load testing was conducted on October 17 and 18, 2013 in collaboration
  
  with Maine DOT personnel to evaluate the performance of the girder with potential gains expected due to
  
  unintended composite action.
  
  The strain measurements were consistent, and the results appear reliable. Measured strains clearly indicated partial
  
  composite action between the girder and slab for Bridge No. 5506 and full composite action for Bridge No. 5507.
  
  Given that partial composite action was observed in Bridge No. 5506 and the flange is not partially embedded, the
  
  interior girder HL-93 operating rating factor for flexure can only be increased from 0.56 to 0.88 based on measured
  
  strains. However, the interior girder moment rating factor for Bridge No. 5507 can be increased to 0.92 based on
  
  analysis alone if the MaineDOT agrees that the girder will be able to develop its noncomposite plastic moment
  
  capacity given its partial embedment in the slab. The measured strains indicate that other sources of structural
  
  stiffness and capacity may justify a further increase in HL-93 operating rating factor to 1.18 for interior girder
  
  flexure in Bridge No. 5507.
  
  
• Format:
  PDF
• Funding:
  20100506*5729
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:6ffcd2bb7508ba6f8e82c71cf0ffe7fa5ca324bf3019a43e20a268c557d82c69
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28485/dot_28485_DS1.pdf
• File Type:
  [PDF - 6.01 MB ]