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M. Reiterer:
"PARAMETRIC RESONANCE IN TUNED LIQUID COLUMN DAMPERS: AN EXPERIMENTAL INVESTIGATION";
Poster: 20th Danubia-Adria Symposium on Experimental Methods in Solid Mechanics, Györ, Hungary; 2003-09-24 - 2003-09-27.

Tuned liquid column dampers (TLCDs) are innovative vibration absorbing devices in the low frequency range, which have been studied extensively in the last decade, see e.g. Hochrainer [1]. Most research work focuses on the suppression of horizontal motions of structures, but there is still a demand to investigate the influence of vertical motions on the damping behavior of TLCDs, especially if the absorber is attached to earthquake excited buildings or long span bridges. For insufficient modeling in the latter case see Xue [2] et al. When considering vertical motions the TLCD dynamics becomes nonlinear and quite sensitive to parametric resonance. Consequently an unstable system might result that endangers the main structure. A mechanical model of a TLCD under horizontal and vertical excitation has been designed and analyzed numerically and experimentally. For this sake, a small-scale testing facility has been constructed in the laboratory of Structural Dynamics of the TU-Institute.