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:
  Live Loads Load Tests Ratings Reinforced Concrete Bridges
• 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
  
  
• Format:
  PDF
• Funding:
  20130102*2462
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a44255b9c6cbce52744d2476cac7d96c7c23f0cca2840e26c24adfab70177041
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28487/dot_28487_DS1.pdf
• File Type:
  [PDF - 11.72 MB ]