Precision Monitoring of Bridge Deck Curvature Change During Replacement

This project was focused on development and deployment of a system for monitoring vertical displacement in bridge decks and bridge spans. The system uses high precision wireless inclinometer sensors to monitor inclinations at various points of a bridge deck. The inclination data is fed into a mathematical model which calculates vertical displacement. As a specific goal, this project was intended to monitor change in vertical displacement and curvature of a bridge deck during the deck replacement process. Wireless inclination/temperature sensors were developed and thoroughly tested in laboratory environment. Mathematical curvature calculation methods were used to convert inclination data into vertical displacement. Wireless precision inclination/temperature sensors were deployed on a bridge close to Pocomoke City in Maryland, which underwent deck replacement from January until August 2015. The sensor revealed that, temperature change could lead to z changes in inclination of bridge girders. The changes in inclination would lead into temperature induced vertical displacement of a bridge deck. As a result, comparing change in displacement of bridge deck before and after deck replacement is not meaningful unless temperature effects are characterized. The study also revealed shortcoming of surveying, being used to find change in curvature of a bridge, because unless two surveys for a bridge deck are taken place at the same time, their results cannot be directly compared. The method based on wireless inclinometer sensors characterizes the effect of temperature and therefore, it separates contribution of temperature from the change in the displacement caused by deck replacement.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 50p

Subject/Index Terms

Filing Info

  • Accession Number: 01605772
  • Record Type: Publication
  • Report/Paper Numbers: MD-16-SHA-UM-3-18
  • Files: TRIS, ATRI, STATEDOT
  • Created Date: Jul 6 2016 8:44AM