Prestress Losses and Development of Short-term Data Acquisition System for Bridge Monitoring

The University Transportation Center at Utah State University sponsors research through the Federal Highway Administration’s University Transportation Center Program. The purpose of this research is to advance technology and expertise in transportation-related fields. This includes research on the best methods to design, monitor, and inspect bridges. When a vehicle drives over a bridge, each bridge girder carries a portion of the vehicle’s weight. This load causes strain in the bottom of the bridge girders. However, depending on where the vehicle is located on the bridge, some bridge girders carry a higher percentage of the vehicle’s load. This study investigated the amount of strain typical vehicles caused in the bottom of each girder as they travel across the bridge. This research also examined the maximum strains in the bridge girders due to vehicle loads, which is of interest in girder design. In order to resist these vehicle loads, the effective prestress must be accurately determined. This project also quantified the effective prestress in an exterior and interior girder. These measured prestress forces are compared with predicted values in accordance to the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) specifications.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=950
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/48894
• Summary URL:
  https://rosap.ntl.bts.gov/view/dot/68330
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Utah State University, Logan

  Department of Civil and Environmental Engineering, 4110 Old Main Hill
  Logan, UT  United States  84322-4110

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Authors:
  • Pace, Justin M
  • Barr, Paul J
  • Powelson, Phillip
• Publication Date: 2019-6

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 67p

Subject/Index Terms

• TRT Terms: Bridge design; Data collection; Girders; Load and resistance factor design; Prestressing; Strain (Mechanics); Structural health monitoring
• Identifier Terms: AASHTO LRFD Bridge Design Specifications
• Subject Areas: Bridges and other structures; Data and Information Technology; Design; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01713722
• Record Type: Publication
• Report/Paper Numbers: MPC 19-387
• Files: UTC, NTL, TRIS, ATRI, USDOT
• Created Date: Aug 13 2019 9:27AM