A simplified formulation for the aerodynamic instabilityt of bridge decks

Y. Cho, J. Y. Cho, H. E. Lee

Research output: Contribution to conferencePaper

Abstract

Aerodynamic instability of flexible bridge decks have been treated by a variety of engineering disciplines, each having its particular terminology. Since flutter is one of the divergenttype oscillations, the onset of flutter directly induces structural failure. Therefore, in the design of long spanned bridges, flutter stability has to be carefully investigated not to excite the flutter oscillation below the designed wind velocity. In this paper, a historical development of flutter instability and simplified approximate method are briefly described. Simplified formulations for estimating the inwind frequencies, damping ratios, and critical wind velocity at varying flexible bridge decks are presented by deduced from impedance matrix of in-wind bridge system.

Original languageEnglish
Publication statusPublished - 2008
Event11th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC-11 - Taipei, Taiwan, Province of China
Duration: 2008 Nov 192008 Nov 21

Other

Other11th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC-11
CountryTaiwan, Province of China
CityTaipei
Period08/11/1908/11/21

Keywords

  • Aerodynamic instability
  • Flutter velocity
  • Long span bridge
  • Simplified formulation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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