Live load testing and load rating of five reinforced concrete bridges.

Details

• Creators:
  Goslin, Keenan ; Davids, Bill
• Corporate Creators:
  University of Maine. Advanced Structures and Composites Center
• Subject/TRT Terms:
  • Reinforced concrete bridges
  • Live loads
  • Load tests
  • Ratings
• Publication/ Report Number:
  ME 14-13
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maine
• Corporate Publisher:
  Maine. Dept. of Transportation
• Abstract:
  Five cast-in-place concrete T-beam bridges – Eustis #5341, Whitefield #3831, Cambridge #3291, Eddington #5107, ; and Albion #2832 – were live load tested. Revised load ratings were computed either using test data or detailed ; analysis when possible. In four of the five bridges, increases in rating factors were made through analysis alone. The ; Cambridge bridge was shown to have HL-93 operating rating factors greater than 1.0 for both shear and moment ; without testing. Additionally, gains are presented for two of the five bridges (Eustis and Whitefield) where test ; data was used to compute an adjustment factor K for midspan bending, where the revised rating factor equals K x ; RF. Adjustment factors were found to be 1.61 and 1.24 for Eustis and Whitefield, increasing their flexural rating ; factors to 1.14 and 1.06 if accepted by the Maine DOT. Similarly, our analyses indicate that Eustis has a rating ; capacity greater than 1.0 for shear. While Whitefield has a rating factor greater than 1.0 for shear at the supports, the ; rating factor for shear near the termination of the bent-up reinforcing is 0.48 based on our analyses. ; Low loads used in the live load tests of both Albion and Eddington, where only one truck was provided on site, ; preclude the development of revised rating factors based on the test data. However, both of these structures did ; exhibit better-than-expected live load distribution. Further, analysis of the Albion bridge indicates that the ; consultant-provided load ratings for this structure can likely be increased significantly. ; Use of these revised load ratings, live load test data, and extrapolation of these results to other structures is at the ; sole discretion of the bridge owner. ; The objective of this study, to implement an effective live load testing bridge program, was fulfilled
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• Format:
  PDF
• Funding:
  20130102*2462
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28487/dot_28487_DS1.pdf
• File Type:
  [PDF - 11.72 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a44255b9c6cbce52744d2476cac7d96c7c23f0cca2840e26c24adfab70177041