An experimental algorithm for detecting damage applied to the I-40 bridge over the Rio Grande

Conference · Sat Oct 01 00:00:00 EDT 1994

OSTI ID:10190739

Mayes, R L

An algorithm originally used to locate errors in finite element models is applied to a full scale bridge damage detection experiment. The method requires experimental frequency response function data measured at discrete locations along the major bridge load paths. In the bridge damage application the algorithm is most effective when applied to static flexibility shapes estimated with a truncated set of six mode shapes rather than individual mode shapes. The algorithm compares ``before damage`` and ``after damage`` data to locate physical areas where significant stiffness changes have occurred. A damage indicator shows whether damage is detectable. Damage is correctly located in the two most significant damage cases using the driving point static flexibility estimates. Limitations of the technique are addressed. The damage detection experiment was performed on a three span steel girder bridge that was 425 feet long. This bridge was part of Interstate 40 across the Rio Grande. The New Mexico State University Department of Civil Engineering organized the experiment. The frequency response functions were collected by Los Alamos National Laboratories personnel. The bridge excitation was provided by Sandia National Laboratories.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10190739
• Report Number(s): SAND-94-1624C; CONF-950240-1; ON: DE95001832; BR: GB0103012
• 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

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
BRIDGES
NONDESTRUCTIVE TESTING
ALGORITHMS
MECHANICAL VIBRATIONS
FINITE ELEMENT METHOD
FAILURE MODE ANALYSIS
DAMAGE
STRESS ANALYSIS
420200
990200
FACILITIES, EQUIPMENT, AND TECHNIQUES
MATHEMATICS AND COMPUTERS