INFLUENCE OF THE EXCITATION FREQUENCY CONTENT ON THE EFFICIENCY OF A TUNED LIQUID COLUMN DAMPER
THE CURRENT STUDY ADDRESSES THE INFLUENCE OF THE EXCITATION FREQUENCY CONTENT ON THE EFFICIENCY OF A TUNED LIQUID COLUMN DAMPER (TLCD) TO CONTROL THE DISPLACEMENT RESPONSE IN STRUCTURES SUBJECTED TO SEISMIC EXCITATIONS. A TIME-DOMAIN STOCHASTIC STATIONARY ANALYSIS IS PERFORMED, AND AN EQUIVALENT STATISTICAL LINEARIZATION FOR THE TLCD IS OBTAINED. THE RESULTS SHOW THAT THE TLCD IS MORE EFFICIENT IN STRUCTURES SUBJECTED TO BROADBAND PROCESSES. IN NARROWBAND PROCESSES, THE MAXIMUM PERFORMANCE OF THE TLCD OCCURS WHEN THE LINEAR EQUIVALENT PERIOD OF THE SYSTEM TLCD-STRUCTURE TUNES THE TLCD PERIOD, AND THE FREQUENCY OF THE STRUCTURE MATCHES THE PREDOMINANT FREQUENCY OF THE INPUT MOTION. RESULTS DERIVED FROM THIS ANALYSIS ARE VALIDATED THROUGH TWO TIME-HISTORY SEISMIC ANALYSES.
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