Response modification for enhanced operation and safety of bridges.

Details

• Creators:
  Gastineau, Andrew ; Schultz, Arturo ; Wojtkiewicz, Steven F.
• Corporate Creators:
  University of Minnesota. Dept. of Civil Engineering
• Subject/TRT Terms:
  • Bridges
  • Live loads
  • Structural health monitoring
  • Inspection
  • Structural analysis
  • Testing
  • Nondestructive tests
  • Maintenance
  • Bridges--Maintenance and repair
  • Bridges--Nondestructive testing
  More +
• Publication/ Report Number:
  CTS 11-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Minnesota
• Edition:
  Final report.
• Corporate Publisher:
  University of Minnesota. Center for Transportation Studies
• Abstract:
  This report shows that safe extension of the service life of existing bridge structures is possible through bridge ; health monitoring and structural response modification. To understand bridge health monitoring and structural ; response modification and control, it is necessary to examine: 1) common bridge vulnerabilities, 2) bridge loading ; models, 3) response modification devices, and 4) bridge monitoring systems. The efficacy of response modification ; techniques on a realistic bridge system were demonstrated using the Cedar Avenue Bridge in Minnesota as a ; specific example. The Cedar Avenue Bridge is a steel tied arch bridge which means that it is fracture critical. Due ; to the non-redundant nature of a fracture critical bridge, fatigue failure could be catastrophic and is of concern. ; Previous research has shown that stress concentrations exist at the joints where the hangers and floor beams are ; attached to the box girder 7. Using a simulation of response modification on the Cedar Avenue Bridge model, ; stress ranges have been reduced on these specific details that are of concern. Modeling using a scissor jack and ; simple damping device has shown that stress ranges can be reduced by approximately 39% which can lead to life ; extension of as much as 346%.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23288/dot_23288_DS1.pdf
• File Type:
  [PDF - 938.68 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:70cbd37585ecc8774386817dc504ea2f988298a1d35558aaac5c208b0243d9edc104ad81ddb2353a9f37f0fb0f58a752068290bfefc4849d2a18efb1986fb594