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Title:Prestress Losses and Development of Short-term Data Acquisition System for Bridge Monitoring
Authors:Justin Pace, Paul Barr, and Phillip Powelson
University:Utah State University
Publication Date:Jun 2019
Report #:MPC-19-387
Project #:MPC-512
TRID #:01713722
Keywords:bridge design, data collection, girders, load and resistance factor design, prestressing, strain (mechanics), structural health monitoring



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 AASHTO LRFD specifications.

How to Cite

Pace, Justin, Paul Barr, and Phillip Powelson. Prestress Losses and Development of Short-term Data Acquisition System for Bridge Monitoring, MPC-19-387. North Dakota State University - Upper Great Plains Transportation Institute, Fargo: Mountain-Plains Consortium, 2019.

NDSU Dept 2880P.O. Box 6050Fargo, ND 58108-6050