Chimneys and stacks

The design of steel pipe sections for chimneys is very similar to that of supporting structures for wind turbines. The main stress on the chimneys is the wind. In some cases, high temperatures or ice accumulation are also added, which must be taken into account in the design. In particular, the wind-induced transverse vibrations must be investigated in these slender and tall structures. There is vortex-excited transverse vibration when vortices alternately detach on opposite sides of a structure. If the excitation by the wind is in the frequency range of the structure, resonance effects and a build-up of oscillations across the wind can occur.