Multiple tuned liquid sloshing dampers for across‑wind response control of benchmark tall building

摘要

The miss-tuning of multiple tuned liquid sloshing dampers (MTLSDs) on wind-excited benchmark tall building is investigated in the present study. For the present study, 76 storied benchmark tall building is considered. Shallow water wave theory was used to model liquid sloshing in MTLSDs. The combined structure-MTLSDs system's governing equations of motion were expressed in the state-space variable, and the response was numerically calculated. A comparison was made between structural responses of uncontrolled building and building controlled with MTLSDs. Further, MTLSDs effectiveness is evaluated using a scalogram in the time-frequency domain. It was found that MTLSDs effectively reduce the building responses in a similar way like tuned liquid sloshing dampers (TLSDs). However, TLSDs are slightly more effective than MTLSDs for the same mass ratio. But, under miss-tuning conditions, the MTLSDs outperformed the TLSDs, and the structural response was found to be less than allowable limits recommended by the motion perception guidelines. It was found that MTLSDs are slightly better at controlling the higher mode response than TLSDs.