Computation of structural flexibility for bridge health monitoring using ambient modal data

Details

• Creators:
  Doebling, Scott W. ; Farrar, Charles R.
• Corporate Creators:
  Los Alamos National Laboratory
• Subject/TRT Terms:
  • Structural health monitoring
  • Modal analysis
  • Highway bridges
  • Bridge engineering
  • Quality assurance
• Resource Type:
  Proceedings
• Geographical Coverage:
  United States
• Corporate Publisher:
  Los Alamos National Laboratory
• Abstract:
  The issues surrounding the use of ambient vibration modes for the location of structural damage via dynamically ; measured flexibility are examined. Several methods for obtaining the required mass-normalized ; dynamic mode shapes from ambient modal data are implemented and compared. The methods are applied to ; data from a series of ambient modal tests on an actual highway bridge. The results indicate that the massnormalization ; procedures considered all gave comparable results. The results also indicate that for the damage ; case examined, the flexibility from the ambient mode shapes gave a better indication of damage than the ; flexibility from the forced-vibration mode shapes. This improved performance is attributed to the higher excitation ; load levels that occur during the ambient test.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/6476/dot_6476_DS1.pdf
• File Type:
  [PDF - 2.57 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:3a3daabbbc5e70ad7ef4d57ec6e9e1c35b31b43d21d8726b9b604e432fbb60f93879c5fc5c2318d0dd9840dc29173359eeb1a514e0d47dcafb93b1dafae4e776