An unidentified vehicle recently struck the bottom of a railroad overpass and damaged one of the concrete beams in the overpass. The damaged beam was taken intact to the University of Texas where the Spectral-Analysis-of-Surface-Waves (SASW) method was used to nondestructively delineate the damaged zones. SASW measurements performed on the beam revealed a significant velocity contrast between damaged and undamaged zones. These measurements were consistent with visual inspection of the beam and also indicated the presence of cracking that was not visibly detectable. In addition, SASW measurements taken while repairing the beam revealed how surface wave velocity measurements can be used to monitor improvements in the integrity of a beam after each repair step.
|Title of host publication||Innovations in Nondestructive Testing of Concrete|
|Editors||Stephen Pessiki, Larry Olson|
|Publisher||American Concrete Institute|
|Number of pages||26|
|State||Published - Apr 1 1997|
|Event||Innovations in Nondestructive Testing of Concrete at the 1995 ACI Fall Convention - Montreal, Canada|
Duration: Nov 5 1995 → Nov 10 1995
|Name||American Concrete Institute, ACI Special Publication|
|Conference||Innovations in Nondestructive Testing of Concrete at the 1995 ACI Fall Convention|
|Period||11/5/95 → 11/10/95|
Bibliographical noteFunding Information:
I would like to thank Dr. Kenneth H. Stokoe II for his guidance during this project, as well as Rob Zobel and Dr. James Jirsa for their cooperation in allowing the collection of data on their specimen. I would also like to thank the Texas Department of Transportation for providing support through Projects #1243 and #1370 and the National Science Foundation through grant #MSS-9018962.
© 1997 American Concrete Institute. All rights reserved.
- Nondestructive tests
- Prestressed concrete
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science (all)