Interference effect of grouped structures exposed to the wind action

abstract

English

The present article will consider aeroelasticity behaviour of the group of structures. The most significant phenomenon is wake galloping (also called buffeting) on cylinder shape bodies. A non-deformed circular section was presumed. The relation between the wind attack angle and civil engineering structures response was observed. We take into account (i) interaction between the deformation of an elastic structure in an air stream and the resulting aerodynamic force (ii) the interference effects between group members. Two or more cylinders near each other commonly emerge on civil engineering structures -- cables, pliers, truss members, chimneys, cooling towers, etc. A body that is to windward of another will affect the wind forces on the second one, if they are within six diameters of each other. Semi-aerodynamic shapes in mutual proximity have both static and dynamic effects on each other, as the vortices from one will have a disturbing influence on the other. Oscillations set up in one member can also be transmitted to another. To obtain the wind resultant induced pressure on bodies' surface, the Computational Fluid Dynamics model with Fluid-Structure interaction ability was used.

High rise building, wind action, CFD, ansys

KALA, J.

1. 8. 2004

Finland

92

92

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