Akademik Veri Yönetim Sistemi
Structures, cilt.86, 2026 (SCI-Expanded, Scopus)
Tuned Mass Dampers (TMDs) are widely known for their effectiveness in reducing structural vibrations; however, their performance is highly sensitive to detuning, wherein shifts in the structure’s natural frequency can substantially reduce their efficiency. This study introduces a novel bi-tuned mass damper (bi-TMD) system as a robust and practical alternative to both conventional single TMDs and more complex MTMD configurations. Three distinct bi-TMD configurations are investigated for a benchmark ten-story shear building: bi-TMD1, featuring vertically distributed masses; bi-TMD2, employing parallel masses on the top floor; and bi-TMD3, consisting of series-connected masses on the top floor. An optimization problem is formulated in the frequency domain to determine the optimal parameters (i.e., frequency, mass, and the damping ratio) of the bi-TMDs. The objective function minimizes the H∞ norm of the structure’s transfer function. The optimization is performed using a new enhanced Particle Swarm Optimization (PSO) algorithm incorporating a Trap Avoidance Operator (TAO-PSO), which effectively prevents premature convergence and improves global search performance. The results indicate that all proposed bi-TMD configurations substantially outperform conventional single-mass TMDs, with the series configuration (bi-TMD3) consistently delivering the most significant response reduction. Time-history analyses using a suite of near-field and far-field earthquake records confirm the system’s effectiveness, showing average reductions of 18–29% in peak displacement and 35–48% in RMS acceleration. Finally, a sensitivity analysis demonstrates that the proposed bi-TMD systems exhibit remarkable robustness, maintaining superior performance under structural stiffness variations of up to ±20%.