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:
  Condition Surveys Digital Cameras Girder Bridges Instrumentation Sensors Strain Measurement Structural Health Monitoring
• 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.
  
  
• Format:
  PDF
• Funding:
  15680L, A001(267)
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dd3c8ce8f807c134c44f97babd7fcd651d540ccc2bace0ac8afb847011714546
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29113/dot_29113_DS1.pdf
• File Type:
  [PDF - 7.41 MB ]