Eurocode procedures for predicting vortex excitation
conference paper
Vortex-induced vibrations may occur in slender structures such as cables, chimneys, towers and bridge decks. A full analytical description of the phenomenon is still not available, and the procedures used to predict vortex-induced vibrations of structures are still rather crude. The different opinions on how to represent the phenomenon mathematically are reflected in the variety of procedures used in practical designs. The paper describes the most important flow and structural characteristics governing vortex-induced vibrations of structures with circular cross section. The different mathematical approaches presently used to model the phenomenon are described and their modelling of the different physical aspects is discussed. The predictions of vortex-induced vibrations in the draft of the EN-Eurocode on wind actions, EN 1991-1-4, are outlined and some of the improvements compared to the present ENV-Eurocode, ENV 1991-2-4:1995, originally published in 1995, are emphasized. The paper is based on a draft EN and the specifications given may, therefore, deviate from the final EN under preparation.
TNO Identifier
329998
Source title
3rd European & African Conference on Wind Engineering (EACWE), 2-6 July 2001, Eindhoven, The Netherlands
Collation
8 p.
Pages
173-180
Files
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