UPPER ANCHORAGE OF COLUMN BARS IN BRIDGE PYLONS
IN SINGLE-COLUMN PYLONS HAVING CANTILEVERED ARMS SUPPORTING HIGHWAY SPANS, A LARGE TENSION MAY BE INDUCED IN THE COLUMN BARS FROM UNEQUAL LIVE LOADS ON OPPOSITE ARMS. THE UPPER ANCHORAGE OF SUCH LARGE COLUMN BARS, GENERALLY NO. 14S AND NO. 18S, CAN BE QUESTIONED BECAUSE OF THE VARYING STRESS FROM THE BENDING FORCES PERPENDICULAR TO THE BARS, INCLUDING POSSIBLE TENSILE CRACKS PARALLEL TO THE BAR IN THE TRANSVERSE BEAM. A SPECIFIC DETAIL CURRENTLY BEING USED IN TEXAS WAS TESTED IN FULL SIZE AND FOUND ADEQUATE. BASED ON THIS TEST AND REINFORCING STEEL STRAIN DATA COLLECTED, SOME CONSERVATISM IN THE ANCHORAGE LENGTH PROVIDED UNDER ULTIMATE STRENGTH DESIGN SEEMS DESIRABLE. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Concrete Superstructures. 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:
- Rajagopalan, K S
- Ferguson, Phil M
- Publication Date: 1970
Media Info
- Media Type: Print
- Features: Figures; Photos; References;
- Pagination: pp 62-71
- Monograph Title: Bridges, foundations and retaining walls
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Serial:
- Highway Research Record
- Issue Number: 302
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Anchorages; Bending; Bending stress; Bridge superstructures; Cantilevers; Columns; Length; Live loads; Reinforcing steel; Stresses; Tension; Ultimate load design
- Uncontrolled Terms: Bridge spans; Tensile stress
- Old TRIS Terms: Anchor beams; Ultimate strength design
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00209245
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 3 1970 12:00AM