Multiple tuned liquid sloshing dampers for across-wind response control of benchmark tall building-A Review

Abstract: This study investigates the influence of miss-tuning in multiple tuned liquid sloshing dampers (MTLSDs) on the wind-induced response of a 76-story benchmark tall building. The sloshing behaviour of the liquid within the dampers is modelled using shallow water wave theory, and the governing equations of motion for the combined structure-damper system are expressed in a state-space framework for numerical analysis. Comparative outcomes between the uncontrolled structure and the structure that is installed with MTLSDs reveal a very significant reduction in structural responses due to the incorporation of the dampers. Though the traditional tuned liquid sloshing dampers (TLSDs) are marginally more efficient at optimal tuning conditions, MTLSDs show higher performance at miss-tuning conditions. They efficiently keep the structural response within acceptable levels as specified by motion perception criteria and provide greater control over upper mode responses than TLSDs, deciding their strength under practical conditions.

Keywords: Tuned Liquid Sloshing Damper (TLSD), Sloshing dynamics, Seismic excitation, Wind-induced vibrations, Structural damping, Frequency tuning, Energy dissipation, Resonance, Fluid-structure interaction, Structural control systems.