Nonlinear response analysis of long-span bridges under turbulent winds

Xinzhong Chen, Ahsan Kareem

Research output: Contribution to journalArticle

72 Scopus citations

Abstract

This paper presents a time domain analysis framework for predicting nonlinear response of long-span bridges under turbulent winds. The nonlinear unsteady aerodynamic forces are modeled based on static force coefficients, flutter derivatives, admittance functions, and their spanwise correlations at varying angles of incidence. This analysis framework incorporates frequency dependent parameters of unsteady aerodynamic forces by utilizing a rational function approximation technique. A comparison with conventional linear approach is made through response analysis of a long-span suspension bridge. The effects of turbulence on the flutter instability are also addressed.

Original languageEnglish
Pages (from-to)1335-1350
Number of pages16
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume89
Issue number14-15
DOIs
StatePublished - Dec 2001

Keywords

  • Aerodynamics
  • Aeroelastic analysis
  • Bridge
  • Buffeting
  • Flutter
  • Nonlinear analysis
  • Turbulence
  • Wind

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