Dynamics of tall buildings under stochastic wind load: applicability of Eurocode EN 1991-1-4. Procedures 1 and 2
conference paper
The new generation of tall buildings is higher and more slender than the buildings built before. Additionally, increased use is made of high-strength materials which have a higher strength yet the same stiffness properties as conventional materials. Both aspects increase the sensitivity of tall buildings to dynamic behaviour. The design has to ensure adequate reliability but it also has to ensure that people in the building feel comfortable particulary when subject to wind-induced vibrations. Fulfilling vibration criteria for human comfort is decisive in the structural design of most tall buildings. The new Eurocode EN 1991-1-4 provides two different procedures to calculate the structural factor and the comfort level. This paper gives insight in the background theory of wind-induced vibrations. On the basis of this the two procedures are compared. The conclusion is that procedure 1 might be unsafe and it turns out that procedure 2 is preferable.
TNO Identifier
447069
Source title
5th European and African Conference on Wind Engineering, EACWE 5, 19-23 July 2009, Florence, Italy
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