WIND STABILITY OF SUSPENSION BRIDGES. APPLICATION OF THE THEORY OF THIN AIRFOILS
A SURVEY OF THE WIND FORCES ACTING ON AN IDEALIZED SUSPENSION BRIDGE IS GIVEN, AND IT IS SHOWN HOW THE STATIC AND DYNAMIC CHARACTERISTICS OF THE BRIDGE SHALL BE DESCRIBED. IN RELATION TO THE STATIONARY WIND FORCES THE DIVERGENCE PROBLEM IS TREATED AND A SIMPLE APPROACH TO THE FLUTTER PROBLEM IS GIVEN. FOR THE UNSTATIONARY CASE (I.E. A VIBRATING BRIDGE) THE WIND FORCES ARE DISCUSSED BRIEFLY AND THE EQUATIONS FOR THE FLUTTER MOTION ARE QUOTED. THE METHOD BY WHICH THE AUTHOR HAS SOLVED THESE EQUATIONS IS INDICATED, AND THE RESULTS OF THE NUMERICAL CALCULATIONS ARE GIVEN IN GRAPHS. THE USE OF THE GRAPHS IS DEMONSTRATED, AND THE RELATION BETWEEN THE EXACT SOLUTION AND THE FORMULAS OF SELBERG AND ROCARD IS DISCUSSED. THE RESULTS OF SOME MODEL TESTS WHICH HAVE BEEN CARRIED OUT IN CONNECTION WITH THE NEW LILLEBEALT BRIDGE ARE GIVEN, WHEREBY THE INFLUENCE OF THE FORM OF THE CROSS SECTION UPON THE CRITICAL WIND VELOCITY IS ILLUSTRATED. ALSO SOME TESTS WITH VARYING TORSIONAL RIGIDITY ARE MENTIONED. (RRL(A)
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Supplemental Notes:
- 20 Pp, 14 FIG, 1 TAB, 7 REF
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Authors:
- FRANDSEN, A G
- Publication Date: 1966-11
Media Info
Subject/Index Terms
- TRT Terms: Bracing; Dynamics; Equations; Graphics; Stability analysis; Statics; Suspension bridges; Theory; Velocity; Vibration; Wind; Wind pressure
- Uncontrolled Terms: Dynamic characteristics; Graphical analysis; Model tests
- Old TRIS Terms: Bridge dynamics; Wind bracing; Wind velocity
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00208575
- Record Type: Publication
- Source Agency: Road Research Laboratory /UK
- Files: TRIS
- Created Date: Sep 18 1994 12:00AM