Vibration testing of the I-40 bridge before and after the introduction of damage
Because the bridges over the Rio Grande were to be razed, the investigators were able to introduce simulated cracks in four stages of increasing length into the structure. This paper summarizes the results of ambient and conventional, measured-input, modal analyses, performed on the undamaged structure. Also summarized are the results of conventional modal analyses performed after each stage of damage had been introduced. These tests were intended to quantify the amount of damage necessary to produce changes in the global dynamic properties of the bridge and to form a data base that can be used by other investigators to develop damage identification algorithms. Conventional modal analysis identified changes in the global dynamic properties of the structure only after the final stage of a damage.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- Federal Highway Administration, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10194229
- Report Number(s):
- LA-UR-94-3470; CONF-950240-3; ON: DE95002711
- Resource Relation:
- Conference: International modal analysis conference,Nashville, TN (United States),13-16 Feb 1995; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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