A NUMERICAL INTEGRATION METHOD FOR COMPUTING THE FLUTTER SPEEDS OF SUSPENSION BRIDGES IN ERECTION CONDITIONS

A numerical method is described for calculating the flutter speeds of suspension bridges in the erection condition without recourse to an eigenvalue solution. The method is based on numerical integration and does not require a priori determination of the structural stiffness matrices. The technique can be applied to other structures which exhibit similar aeroelastic phenomena. The method requires as initial data the equilibrium geometry of the suspension bridge. The deflexions of a suspension bridge in the erection condition from the complete bridge dead load geometry are usually in the finite deflexion range. A method of determining the equilibrium geometry of the bridge in the erection condition using dynamic relaxation is presented. /Author/TRRL/

• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • Iwegbue, I E
  • BROTTON, D M
• Conference:
  • Institution of Civil Engineers, Proceedings
• Publication Date: 1977-12

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 785-802
• Serial:
  • Volume: 63

Subject/Index Terms

• TRT Terms: Aerodynamics; Aeroelasticity; Bridge design; Bridges; Calculation; Deflection; Design; Equilibrium methods (Structural analysis); Matrices (Mathematics); Methodology; Natural frequency; Numerical analysis; Stiffness; Structural design; Structural engineering; Suspension bridges
• Old TRIS Terms: Equilibrium methods (Structural)
• ITRD Terms: 5492: Aerodynamics; 3455: Bridge; 6464: Calculation; 5586: Deflection; 9011: Design (overall design); 9102: Method; 5549: Natural frequency; 3476: Suspension bridge
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00173333
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Jun 28 1978 12:00AM