Seismic Performance of FTMDs in High-Rise Structures Considering Uncertainties

Addressing seismic vibrations in tall buildings has long been a challenge, with tuned mass dampers (TMDs) recognized as a vital solution. The friction tuned mass damper (FTMD) is particularly notable for its nonlinear characteristics and independence from velocity-based damping systems. This research investigates the performance of FTMDs in 20- and 40-story steel moment-resisting frames (MRF) modeled using OpenSees, with a focus on structures featuring rigid connections and panel zones to replicate real-world nonlinear behavior. Nonlinear dynamic analysis, combined with Monte Carlo simulations, was employed to evaluate the effectiveness of FTMD under variations in mass ratio, damping ratio, frequency tuning, and friction coefficient. The Monte Carlo approach provided a probabilistic perspective for evaluating structural responses, such as roof displacement, inter-story drift, and acceleration, under a range of earthquake intensities. Results indicate that FTMDs can significantly reduce seismic vibrations, thereby enhancing structural resilience through decreased displacements and improved energy dissipation. However, sensitivity analyses reveal that even slight changes in parameters can significantly impact performance, underscoring the need for robust optimization methods. The study demonstrates the versatility of FTMDs across various structural models, underscoring their significance in enhancing sustainability, disaster resilience, and economic viability in contemporary high-rise construction. These insights advance the field of seismic control technologies and interdisciplinary studies in structural engineering.