Innovative Passive Control Systems to Increase Human Comfort in Tall Buildings

Christian Meinhardt
Director
GERB Vibration Control Systems, Inc, Berlin

High Performance Materials, enhanced design methods and much higher certainties in wind engineering lead to a more slender design of tall buildings. To ensure the serviceability of the buildings passive TMD systems are a standard application to increase the structural damping of buildings to obtain increased comfort for the occupants. The increased slenderness leads to longer building periods which not only increase
the susceptibilty to wind induced vibrations but also pose a challenge for the design of passvie TMD systems, since the application of single or folded pendulum systems would require to allocate a vast mounting space to accomodate the required pendulum length. To reduce the required mounting space an innovative low friction sliding system has been developed that combines the requirements of high efficiency performance for all kinds of wind events with the durability, maintenance free design and robustness of standard pendulum systems. In addition, these systems allow a simple modular installation to reduce crane picks and installation time. Furthermore the tuning frequency can be easily modified by exchanging the elastic elements and a damper modification is also possible without any great effort.
This contribution shall give an overview of these innovative systems and show examples of their application in tall buildings. Results of long term monitoring of the buildings and TMD systems will be presented and the work shop tests to ensure the full functionality of these innovative systems will be introduced. Furthermore an overview about the simplified installation sequence will be given with examples from realized projects.