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:
  • Bridges
  • Live loads
  • Load tests
  • Girders
  • Strain measurement
  • Bridge decks
• 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.
  More +
• Format:
  PDF
• Funding:
  20100506*5729
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28485/dot_28485_DS1.pdf
• File Type:
  [PDF - 6.01 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:6ffcd2bb7508ba6f8e82c71cf0ffe7fa5ca324bf3019a43e20a268c557d82c69