The 195-meter flagpole in the Azerbijani capital of Baku, Azerbaijan has been installed and designed to withstand extreme wind and seismic activity. Located on the shores of the Caspian Sea that exposes it to high winds, it also needed to support a massive 35 x 70 meter flag hoisted onto the flagpole. To counteract dangerous vibrations, Munich-based MAURER supplied and installed three precisely tuned mass dampers (TMDs) in the upper sections of the mast.
Composed of ten conical metal segments, the flag pole faces immense wind forces that cause vibrations, leading to resonance and potential structural damage or even collapse. Given these challenges, three TMDs were designed and produced for installation inside of segment nine at approximately 180 meters. The dampers were pre-assembled in Munich, tested by TUV SUD, and delivered to Baku. Because they needed to be installed on the ground before the segment was mounted up onto the mast, they were carefully fitted one above the other before being raised.
The damper masses resemble a three-quarter cylinder. They are each suspended from three pendulum rods secured to the inner wall of the mast. This special shape is necessary so that the maintenance ladder can run up the center of the mast to the top. The damper masses are each secured horizontally to the wall by four hydraulic dampers. These dampen the movements of the pendulums and stop the masses from colliding with the wall.
Each damper is designed to activate at different wind intensities. The largest mass damper is 7.1 tons, measuring 144 x 6,414 mm in length and with frequencies ranging between 0.65 and 1.32 Hz. Suspended by pendulums inside the mast, they counteract the flagpole’s movements, reducing vibrations by a factor of two to ten and ensuring structural longevity for over 30 years.
Familiar with regional conditions, MAURER was also the supplier of custom dampers for the 276.3 meter Baku Tower and 195.9 meter SOCAR Tower.