Analysis of Different Placement Strategies of Multi-Tuned Mass Dampers Placed in Building Height

One of the widely used control devices is a tuned mass damper (TMD) due to its simplicity and cost-efficiency. Although using the TMD is so promising, there are still some challenging tasks; obtaining optimum design parameters and optimum placements of a structure plays a vital role in the effectiveness of a TMD. In addition to those challenging tasks in design, using a single TMD can only be operative in a small frequency range unless multi-tuned mass dampers (MTMDs) are employed. Therefore, the MTMD placements are the focus of this study, distributed along with the building height under selected excitations. When the first three modes are aimed to be controlled by MTMDs, this is called the multi-mode controlling placement (MMCP) strategy, and all TMDs are tuned to the first, second, and third modes of the uncontrolled structure in order. Another strategy is the first mode dominant placement (FMDP); three TMDs are mostly tuned to the first (dominant) mode of the structure. For both strategies, MTMDs can be applied on any floor of the structure. Six optimal MTMD placement cases are initially determined considering FMDP and MMCP strategies. The results of all placements are examined in dynamic response and energy evaluation. The obtained results show that while the FMDP performs better to reduce the maximum floor displacement and velocity, MMCP outperforms by controlling the maximum acceleration.