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

Conference · Wed May 01 00:00:00 EDT 1996

OSTI ID:238358

Doebling, S W; Farrar, C R

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 method are applied to data from a series of ambient modal tests on an actual highway bridge. Results 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.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 238358
• Report Number(s): LA-UR-96-0305; CONF-9605100-4; ON: DE96008149
• Resource Relation: Conference: 11. American Society of Civil Engineers (ASCE) engineering mechanics conference, Ft. Lauderdale, FL (United States), 19-22 May 1996; Other Information: PBD: [1996]
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
BRIDGES
DAMAGE
MONITORING
MECHANICAL VIBRATIONS
MATHEMATICAL MODELS
QUALITY ASSURANCE
INSPECTION
MECHANICAL ENGINEERING
OSCILLATION MODES
MATRICES