Load ratings using an in-service bridge monitoring system.

摘要

This thesis investigates the use of in-situ strain data to directly calculate load ratings for bridges. Six bridges were monitored using an In-Service Bridge Monitoring System (ISBMS) for two week periods. The data collected is presented, along with the resulting load ratings for each bridge. The load ratings calculated using the collected data are compared to ratings computed using the standard practice. In addition to yielding higher load ratings, the ISBMS system has great potential to be used to understand changes in bridge condition over time. By monitoring a network of bridges, and by collecting new data sets every two years, bridge owners will be better able to track the health of their bridges. Also included in this thesis is the testing and evaluation of a peak gauge that can be used for long term strain monitoring of bridges. This system mechanically stores the peak strain experienced by the system over the deployment period. The advantages of the peak gauge are presented, as well as the use of the collected data in calculating load ratings for bridges.