WIND EXCITED OSCILLATIONS IN THE HANGERS OF THE PEACE RIVER BRIDGE
THE PEACE RIVER BRIDGE CONSISTS OF ONE 300' AND THREE 405' STEEL STIFFENED TIED ARCH SPANS WITH ROLLED BEAM APPROACH SPANS. THE ARCH RIBS AND STIFFENING GIRDERS OF THE TIED ARCH SPANS ARE RIVETTED BOX MEMBERS. THE STIFFENING GIRDER IS SUPPORTED BY HANGERS OF 12 3/4 INCH DIAMETER STEEL PIPE WITH END CONNECTIONS WELDED TO THE PIPES AND FIELD BOLTED TO THE RIBS AND STIFFENING GIRDERS. SHORTLY AFTER THE FIRST SPAN, ONE OF THE 405' SPANS WAS ERECTED. AN OSCILLATION WITH AN AMPLITUDE IN THE ORDER OF 5" WAS OBSERVED IN THE LONGEST HANGERS. IT WAS THEN APPARENT THAT THE HANGERS WERE SUSCEPTIBLE TO WIND EXCITED OSCILLATIONS, A SITUATION WHICH COULD NOT BE ALLOWED TO CONTINUE. THE ACTION IS PRESENTED OF THE BRIDGE DESIGN OFFICE, THE ENGINEERING SECTION IN CANADA IRON'S WESTERN BRIDGE DIVISION WHO FABRICATED AND TIED THE SPANS, AND THE ALBERTA RESEARCH COUNCIL THROUGH THE STEPS OF HANGER DESIGN, MONITORING OSCILLATIONS, TRIAL SOLUTIONS AND TO THE FINAL SOLUTION TO THE PROBLEM OF HANGER OSCILLATIONS. /CGRA/
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Supplemental Notes:
- Vol21, 10pp, 1 FIG, 2 TAB, 1 APP
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Authors:
- Foster, R L
- Channon, J R
- Conference:
- Publication Date: 1968-4
Subject/Index Terms
- TRT Terms: Bridge design; Bridge engineering; Bridge superstructures; Bridges; Oscillation; Structural design; Structural supports; Wind
- Uncontrolled Terms: Bridge spans; Hangers
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00208217
- Record Type: Publication
- Source Agency: CANADIAN GOOD ROADS ASSOCIATION
- Files: TRIS
- Created Date: Feb 12 1971 12:00AM