INDICIAL AERODYNAMIC FUNCTIONS FOR BRIDGE DECKS

With certain classical results for airfoils as a guide, lift and moment functions of the indicial type are derived for suspension bridge deck sections of either the open truss or streamlined variety. Bluff deck sections susceptible to coherent vortex shedding are not treated. The indicial functions are obtained analytically from the experimentally-derived linear-theory flutter derivatives of the bridge deck sections in question. The method used is nonlinear least squares, wherein a prescribed exponential form with unknown coefficients for the indicial function is determined by fitting transformed counterparts of it to the corresponding experimental flutter derivative curves. Several examples of indicial moment functions of bridge deck sections are presented. These offer rather conclusive proof that Wagneroor thin airfoil theory alone is inadequate for application to bridge buffeting flutter and buffering analyses. /Author/

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Scanolan, R H
  • Budlong, K S
  • Beliveau, J G
• Publication Date: 1974-8

Media Info

• Pagination: p. 657-672
• Serial:
  • Journal of Sanitary Engineering Division
  • Volume: 100
  • Issue Number: EM4
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Aerodynamics; Airfoils; Analysis; Bridge decks; Suspension bridges; Vibration
• Uncontrolled Terms: Buffeting
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00261551
• Record Type: Publication
• Report/Paper Numbers: Proc Paper 10709
• Files: TRIS
• Created Date: Nov 6 1974 12:00AM