ULTIMATE LOAD TEST OF A HIGH-TRUSS BRIDGE
As a result of the construction of the Saylorville Dam and Reservior on the Des Moines River, six highway bridges crossing the river were scheduled for removal. An old pin-connected, high-truss, single-lane bridge was selected for a testing program that included ultimate load tests. The purpose was to relate design and rating procedures currently used in bridge design to the field behavior of this type of truss bridge. The ultimate load tests consisted of testing one span of the bridge, two l-shaped floor beams, and two panels of the timber deck. The theoretical capacity of each of these components is compared with the results from the field tests. This paper examines the portion of the program related to the ultimate load testing of the trusses. The bridge was rated using the 1970 AASHO maintenance manual. The test span ratings of the trusses averaged about 18 percent of actual capacity and were fairly consistent except for the floor beams, where the lateral support conditions for the compression flange caused considerable variation. /Author/
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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
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Authors:
- Klaiber, F Wayne
- Sanders Jr, Wallace W
- Elleby, Hotten A
- Publication Date: 1976
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 75-80
- Monograph Title: Bridge design, testing, and evaluation
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Serial:
- Transportation Research Record
- Issue Number: 607
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Beams; Breaking loads; Bridge decks; Bridge design; Bridge superstructures; Bridges; Field tests; Flanges; Highway bridges; Structural design; Truss bridges
- Uncontrolled Terms: Bridge spans
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00157819
- Record Type: Publication
- ISBN: 0309025826
- Files: TRIS, TRB
- Created Date: Sep 28 1977 12:00AM