Statistical Analysis of Weigh-in-Motion Data for Bridge Design in Vermont

The design loads in the American Association of State Highway and Transportation Officials (AASHTO) Specifications were calibrated in the 1980s and 1990s. Ever since states in the U.S. have been using this code to design bridges, researchers have sought to analyze their performance from the stand-point of bridge reliability. The basic question they are trying to answer is: Does using the AASHTO specified design loading result in the target level of reliability consistent with field data? The goal of this project was to explore this question for the state of Vermont. This project focuses on one type of load, the vehicular live load. For bridges, the primary source of live load is heavy vehicles. The Vermont Agency of Transportation (VTrans) has provided 12 years of Weigh-in-Motion (WIM) data to use for comparison with the AASHTO loads. This is an extensive data set, containing roughly 37 million vehicles. As a comparative reference, the live load in the AASHTO specifications (HL-93) was calibrated using 9,250 vehicles.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Technical Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 113p

Subject/Index Terms

Filing Info

  • Accession Number: 01535706
  • Record Type: Publication
  • Report/Paper Numbers: UVM TRC Report # 14-014
  • Contract Numbers: TRC046-027402, RSCH017-729
  • Created Date: Aug 7 2014 2:33PM