MOTION OF SUSPENDED BRIDGE SPANS UNDER GUSTY WIND

The buffeting response of suspended-span bridges can be calculated if certain wind-tunnel section model data, plus wind spectral information, are provided. The needed wind data are the self-excited aerodynamic (flutter) coefficients. The meteorological data required are vertical & horizontal gust spectra of the natural wind at the bridge site. The natural mechanical modes of vibration in bending (vertical and lateral) and torsion are assumed known, and the response of each of these with postulated negligible aerodynamic coupling between modes, is calcualted. Some examples are then given of the calculated vertical and torsional buffeting responses of a flexible long-span bridge (Golden Gate type) and a stiff, medium-span type (Sitka Harbor). The wind velocity range covered is 60 mph to 90 mph (27 m/s to 40 m/s).

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Scanlan, R H
  • Gade, R H
• Publication Date: 1977-9

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1867-83
• Serial:
  • Journal of the Structural Division
  • Volume: 103
  • Issue Number: ST9
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Aerodynamics; Bending; Bridge superstructures; Mathematical models; Meteorological phenomena; Motion; Suspension bridges; Torsion; Velocity; Vibration; Wind; Wind tunnels
• Uncontrolled Terms: Bridge spans; Models
• Old TRIS Terms: Meteorological data; Wind velocity
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00164864
• Record Type: Publication
• Report/Paper Numbers: ASCE 13222
• Files: TRIS
• Created Date: Nov 9 1977 12:00AM