Smokestacks

As developments in the field of concrete and installation techniques progress, cooling towers made of reinforced concrete are used, for example, in power plant construction and large industrial plants. These usually have a relatively small wall thickness and are usually erected using the climbing construction method.

Tubular steel towers are used in the chemical industry with acidic or basic exhaust gases. In this case, either a coating of the structural steel prevents rapid corrosion or stainless steels are used as an alternative. The individual steel pipe sections are connected to each other via ring flange connections and fixed anchors in foundation befestigt.

The design of the steel tube sections for chimneys is similar to that of support structures for wind turbines sehr ähnlich. Die Hauptbeanspruchung der Schornsteine stellt dabei der Wind dar. In einigen Fällen kommen noch hohe Temperaturen oder Eisansatz hinzu, welche in der Bemessung berücksichtigt werden müssen. Insbesondere müssen bei diesen schlanken und hohen Bauwerke die windinduzierten Querschwingungen untersucht werden. EIt leads to vortex induced vibrations, when on the opposite sides of a structure alternating vortices peel off. If the excitation by the wind lies in the frequency range of the structure, resonance effects and a swaying of the vibrations can occur at right angles to the wind.