Optimum Absorber Parameters for Tuned Liquid Column Dampers

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Abstract
Tuned liquid column dampers (TLCDs) are a class of tuned liquid dampers that impart indirect damping to the primary structure through oscillations of the liquid column in a U-shaped container. The energy dissipation in the water column results from the passage of the liquid through an orifice with inherent head-loss characteristics. The overall damping in a TLCD depends on the head-loss coefficient and the velocity of the oscillating liquid, and it is nonlinear due to the quadratic damping term. Using the TLCD theory and the equivalent linearization scheme, a new approach has been developed that helps to compute the optimum head-loss coefficient for a given level of wind or seismic excitation in a single step, without resorting to iterations. The optimal damping coefficient and tuning ratio of a TLCD using a single degree of freedom system under the white noise and a set of filtered white noise excitations representing wind and seismic loadings is presented. Optimum values of damping have also been invest...

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