COUPLED FLUTTER AND BUFFETING ANALYSIS OF LONG-SPAN BRIDGES

Single-mode-based methods are commonly used to analytically determine flutter and buffeting responses of long-span suspended bridges to wind excitation. Proclivity towards design and construction of even longer span bridges has created the possibility of aerodynamic coupling of the flexural and torsional modes of vibration. The authors of this technical paper present a comprehensive, frequency-domain procedure to capture the multimode aeroelastic and aerodynamic response. The new procedure is applied to assess the coupled response of a cable-stayed bridge. The authors quantitatively assess the modal interactions at flutter and in the buffeting response to reveal the presence and effects of modal coupling. Then, the multimode responses are compared to single-mode and pseudomultimode results. As an extreme example, an airfoil is substituted for the bridge deck flutter derivatives to further examine the ability of this procedure to capture aeroelastic and aerodynamic coupling.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00728766
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 29 1996 12:00AM