Wind and Structures

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Aeroelastic instability of long-span bridges: contributions to the analysis in frequency and time domains

  • Sepe, Vincenzo (Dipartimento di Ingegneria Strutturale e Geotecnica - Universita di Roma "La Sapienza") ;
  • Caracoglia, Luca (Dipartimento di Ingegneria Civile - Universita di Trieste - p.le Europa 1) ;
  • D'Asdia, Piero (Dipartimento di Scienze, Storia dell' Architettura e Restauro - Universita di Chieti "G. D' Annunzio")
  • Published : 2000.03.25
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Abstract

According to research currently developed by several authors (including the present ones) a multimode approach to the aeroelastic instability can be appropriate for suspension bridges with very long span and so with close natural frequencies. Extending that research, this paper deals in particular with: i) the role of along-wind modes, underlined also by means of the flutter mode representation; ii) the effects of a variation of the mean wind speed along the span. A characterisation of the response in the time domain by means of an energetic approach is also discussed.

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References

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