ULTRASONIC EVALUATION OF STEEL BRIDGE GIRDERS OVER LONG RANGES
This paper describes a preliminary study on the use of ultrasonic Lamb waves for detecting fatigue cracks and other types of defects in steel girders at long distances. Lamb waves are capable of propagating long distances, making them ideal for detecting defects in large portions of bridge girders with the transducer placed at an easily accessible location. In this study, practical field testing methods and procedures for detecting fatigue cracks were developed in the laboratory by testing small steel members and a large W section. These methods were then used in a field test of a steel girder bridge to determine if fatigue cracks could be detected in the area of a connection to the web at long ranges. Results from the laboratory tests indicate that cracks can be detected at long ranges using Lamb waves. Field test results indicated that Lamb waves can be used to detect fatigue cracks in the area of a connection to the girder web.
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Corporate Authors:
Technomic Publishing Company, Incorporated
851 New Holland Avenue, Box 3535
Lancaster, PA United States 17604 -
Authors:
- WOODWARD, C
- White, K R
- Parashis, A
- Carrica, V
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Conference:
- Structural Materials Technology. An NDT Conference.
- Location: San Diego, CA
- Date: 1996-2-20 to 1996-2-23
- Publication Date: 1996
Language
- English
Media Info
- Features: Figures; References;
- Pagination: p. 34-39
Subject/Index Terms
- TRT Terms: Bridge foundations; Bridge members; Cracking; Detection and identification; Detectors; Distance; Evaluation; Field tests; Girders; Inspection; Intercity transportation; Long range planning; Metal bridges; Steel bridges; Structural connection; Structural steel; Test procedures; Transducers; Ultrasonic tests; Ultrasonics; Waves; Webbing
- Uncontrolled Terms: Long term
- Old TRIS Terms: Long range distance; Propagation
- Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00725851
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 10 1996 12:00AM