Suspended structural systems are highly susceptible to excessive lateral deformation during earthquakes owing to their unique load-transfer mechanism. To address this issue, this study proposes a seismic mitigation strategy that involves installing a tuned liquid damper (TLD) on the roofs of suspended structures. This approach aims to mitigate seismic responses without substantially increasing structural stiffness. A dynamic model coupling the TLD and the structure was developed, and seismic time-history analyses were performed in MATLAB. The study evaluated the impact of key parameters, including ground motion characteristics, TLD-to-structure mass ratio, frequency ratio, and liquid damping ratio, on the seismic performance of the structure. Results show that the TLD achieves optimal damping performance when the mass ratio is 10%, and the frequency ratio is tuned to 1. While displacement control effectiveness varies depending on the type of earthquake, increasing the TLD damping ratio consistently improves energy dissipation. However, the findings also show that the TLD's control effectiveness decreases under pulse-type seismic excitations, highlighting the need for exploring more effective damping strategies for such conditions.