A simplified and practical numerical analysis of the along-wind dynamic response is pro-
posed. For this purpose, comparative calculations on the Olympic Tower in Munich are
evaluated. The wind velocity field is numerically modelled using the spectral representa-
tion method and the structural reaction is determined by the application of a two-dimensional
dynamic model. As a reference, wind and pressure measurements of the Olympic Tower
were available from the publication series "Contributions to the application of aeroelasticity
in civil engineering" („Beiträge zur Anwendung der Aeroelastik im Bauwesen“). With these
measurements and performed Fluid Structure Interaction simulations, the accuracy of the pro-
posed simulation method is verified. Apart from the analysis of these wind measurements,
further investigations regarding the local wind climate were considered, to get a complemen-
tary picture of the wind behaviour at the Olympic site. In addition, the wind load standard
DIN-EN-1991-1-4, which is valid in Germany in combination with the National Annex served
as a comparison. The numerical structures and flow simulations were mainly carried out with
self-developed programs.
The wind characteristics in Munich are compared between simple DIN EN 1991-1-4 provi-
sions and evaluation of historical wind records as well as on-site wind recordings. Through
the evaluation of wind recordings from measuring stations, a significantly lower design wind
speed is recommended, compared to the speed specified in the standard. This highlights
the practical relevance of considering such evaluations. During the evaluation of the wind
data, the relevant wind directions are determined to west and west-southwest. Furthermore,
no uniform statement can be made about an increase in wind strength due to the climate
effect. After comparing the wind recordings with theoretical values, these measurements are
simulated with numerical methods.
With the simplified numerical approach of turbulent wind subjected to a discretized two-
dimensional dynamic structure, adequate estimates of the longitudinal reactions are obtained.
However, this is only the case for an isolated structure, meaning a free wind flow with no in-
terference effect. The method shows its strength in the simplicity of the modeling and offers
an attractive solution in determining the longitudinal wind response compared to cost inten-
sive wind tunnel tests or Fluid Structure Interaction simulations. This method could be used
especially in the preliminary design stage of a building. Although, for complicated structural
shapes the force coefficient are not available a priori and must either be compared with values
from the literature or calculated with the aid of a Computational Fluid Dynamic simulation.
«
A simplified and practical numerical analysis of the along-wind dynamic response is pro-
posed. For this purpose, comparative calculations on the Olympic Tower in Munich are
evaluated. The wind velocity field is numerically modelled using the spectral representa-
tion method and the structural reaction is determined by the application of a two-dimensional
dynamic model. As a reference, wind and pressure measurements of the Olympic Tower
were available from the publication series "Contributi...
»