REPLACEMENT OR REPAIR OF OLD TRUSS BRIDGES (ABRIDGEMENT)
The results are reported of tests on 6 steel truss bridges (late 19th century) and the effects that strengthening of the deck had on the floor systm. The results of laboratory tests on stringer beams when they are stiffened with nailers and planking are also presented. The results yield a distribution factor that is less conservative than that of AASHTO. The 6 bridges were instrumented with SR-4 strain gauges. The test truck (gravel loaded 2D truck) was placed on each bridge at various positions and induced strains on the various members were recorded. The ratings for the bridges were obtained after computing the probable induced dead and live load stresses and the allowable stresses. The ratings of 3 of the 6 bridges are governed by the strength of the stringers. In most instances the low ratings were due to the fact that no lateral bracing of the compression flange is assumed. This was rectified by the attachment of wooden nailing strips as lateral bracing. Laboratory tests were conducted to evaluate their effectiveness. Models used in the studies are described, and the bridges ratings for the 6 bridges are presented.
- Record URL:
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309025826
-
Supplemental Notes:
- Publication of this paper sponsored by Committee on Dynamics and Field Testing of Bridges. 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
-
Authors:
- Heins, Conrad P
- Fout, William S
- Wilkinson, Raymond Y
- Publication Date: 1976
Media Info
- Media Type: Print
- Features: Tables;
- Pagination: pp 63-65
- Monograph Title: Bridge design, testing, and evaluation
-
Serial:
- Transportation Research Record
- Issue Number: 607
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Bracing; Bridge decks; Lateral supports; Live loads; Mathematical models; Metal bridges; Ratings; Repairing; Static loads; Steel bridges; Strain gages; Stringers; Truss bridges
- Uncontrolled Terms: Models; Repairs; Replacing
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00157816
- Record Type: Publication
- ISBN: 0309025826
- Files: TRIS, TRB
- Created Date: Sep 28 1977 12:00AM