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Title: CRACK DETECTION AT COVER PLATE ENDS AND WELDED SPLICES USING ULTRASOUND TECHNOLOGY
Accession Number: 00603590
Record Type: Component
Availability: Find a library where document is available Abstract: Many steel bridges constructed before 1970 are now of concern because they contain welded fabrication details that are highly susceptible to the formation of fatigue cracks. It is imperative that nondestructive evaluation methodology be available to examine such bridges, especially those with more than 25 years of service history and high volumes of truck traffic. Within Ohio a large number of bridges were fabricated with welded splices and cover plates located over the piers of continuous-beam bridges. Commonly accepted analytical models indicate that the average fatigue life has already been exceeded in some situations. Unfortunately, unaided visual inspection allows no opportunity for early crack detection because the critical top flange surface is embedded in the concrete deck. Research conducted on behalf of the Ohio Department of Transportation has demonstrated that ultrasonic testing procedures may be used to determine whether cracks have been initiated within a top flange surface that is embedded in concrete. Three Interstate highway bridges experiencing high volumes of truck traffic and containing AASHTO Category E' cover plate details were examined during 1989. Application of the ultrasound technology is described and the results of this field investigation are presented.
Supplemental Notes: This paper appears in Transportation Research Record No. 1275, Bridge Research 1990. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01411073
Authors: Zuraski, Patrick DPagination: p. 27-33
Publication Date: 1990
Serial: ISBN: 0309050618
Features: Figures
(11)
; Photos
(4)
; References
(8)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls
Files: TRIS, TRB, ATRI
Created Date: Feb 28 1991 12:00AM
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