Precision monitoring of bridge deck curvature change during replacement.

Details

• Creators:
  Khandani, Mehdi Kalantari
• Corporate Creators:
  University of Maryland (College Park, Md.)
• Corporate Contributors:
  Maryland. State Highway Administration. Office of Policy & Research
• Subject/TRT Terms:
  • Bridge decks
  • Curvature
  • Girders
  • Inclinometers
  • Laboratory tests
  • Structural health monitoring
  • Temperature
  • Vertical displacement monitoring
  • curvature monitoring
  • wireless strain sensor
  More +
• Publication/ Report Number:
  MD-16-SHA-UM-3-18
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Maryland
• Edition:
  Final report
• Corporate Publisher:
  Maryland. State Highway Administration. Research Division
• Abstract:
  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.
  More +
• Format:
  PDF
• Funding:
  MD-16-SHA-UM-3-18
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30962/dot_30962_DS1.pdf
• File Type:
  [PDF - 3.02 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dd60739728e96a31f7bb0cc35e92b0de865ff13064579e56e6807725d38ad346