ACTIVE MASS DAMPERS FOR TIMBER FLOORS

Extensive modeling of timber slabs with active vibration elements has shown that, compared to passive vibration dampers, a significantly better effect is achieved with a fraction of the required mass. In this respect, it is obvious to intensify research in the field of active vibration control. These active damping systems are intended to positively affect the vibration properties of slender slab structures in particular. Fundamental for this research is that the requirements of the Eurocodes are met and the weight of the active elements is kept low. In the present work, the vibration properties, in particular the vibration response of cross laminated timber are addressed. The dynamic parameters determined for a simply line supported system define the following tests which are carried out with actively controlled damping elements. The tests with the cross laminated timber panel suggest that counteracting at certain times and with predefined levels of intensity causes a considerable reduction of the acceleration values. Based on controlling the acceleration response, tests are performed on a complex timber construction. Different excitation, including the random and dynamic motion of people moving on the slab, increase the difficulty to solve this task for slab systems using common control systems. ... mehrTherefore, the purpose of this research is to verify the reduction of floor vibrations and to demonstrate its effectiveness in experiments with human-induced excitation. The results show a significant reduction in vibration acceleration for different types of excitation and highlight the possibilities of active vibration control.