Instrumentation, digital image correlation, and modeling to monitor bridge behavior and condition assessment.

Details

• Creators:
  Bell, Erin Santini ; Gaylord, David ; Goudreau, Adam ; White, Daniel
• Corporate Creators:
  University of New Hampshire. Dept. of Civil Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Girder bridges
  • Structural health monitoring
  • Condition surveys
  • Instrumentation
  • Digital cameras
  • Strain measurement
  • Sensors
• Publication/ Report Number:
  FHWA-NH-RD-15680L
• Resource Type:
  Tech Report
• Geographical Coverage:
  New Hampshire
• Corporate Publisher:
  New Hampshire. Dept. of Transportation. Bureau of Materials and Research
• Abstract:
  Bridge managers have historically relied on visual inspection reports and field observation, including ; photographs, to assess bridge health. The inclusion of instrumentation, including strain gauges, along ; with a structural model can enhance bridge management. This combination of instrumentation and ; modeling is commonly classified as Structural Health Monitoring (SHM). Traditional SHM measurements ; are reference-independent, such as strain gauges. These sensors can be easily installed and provided ; valuable information for bridge condition assessment, including neutral axis location. The collection of ; global deflection of a bridge, a reference-dependent measurement, is more difficult to collect as the ; connection between the bridge structure and a fixed reference is geometrically challenging. A ; measurement technique that alleviates this issue is digital image correlation. Through recent advances ; in digital photography and the computational capability of personal computers, Digital Image Correlation ; (DIC) is a non-contact measurement technique that can be cost-effectively deployed to collect global ; deflection measurements of a bridge structure. DIC uses multiple digital cameras to photograph a target ; object to provide structural response information. This project incorporates a DIC system into the bridge ; instrumentation and testing program for a concrete deck-steel girder composite bridge, Bagdad Road ; over US Route 4, in Durham, New Hampshire. This report presents the instrumentation selection, ; sensors location planning and deployment, structural testing, DIC measurement for displacement, and ; strain measurements in both laboratory and field experiments. This report also includes a detailed ; structural model that is calibrated with collected field structural response data for bridge decision-making ; and management.
  More +
• Format:
  PDF
• Funding:
  15680L, A001(267)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29113/dot_29113_DS1.pdf
• File Type:
  [PDF - 7.41 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dd3c8ce8f807c134c44f97babd7fcd651d540ccc2bace0ac8afb847011714546