Analysis and optimization of tuned mass dampers for seismic resilience in 5- to 20- story buildings

Abstract

Seismic movement in various regions of the world, especially in those located in areas of high tectonic activity such as the Pacific Ring of Fire, has resulted in co nsiderable damage to infrastructure and significant human losses. In South America, particularly in Peru, this high seismic vulnerability has been a constant concern. In response to this global issue, the present study focused on investigating the effectiv eness of Tuned Mass Dampers (TMD) to mitigate seismic effects in buildings of various heights. A comprehensive analysis of building models spanning heights from 5 to 20 stories was carried out, evaluating variations in key parameters such as drifts and acc elerations under different percentages of mass in the TMD, ranging from 1% to 10% of the total building weight, supported by advanced computational analysis using specialized software such as ETABS. The results obtained revealed that the optimum mass perce ntages for TMD varied significantly depending on the height of the building. In taller buildings, specifically 15 and 20 stories, an improved structural response was observed when using 10% mass in the TMD, achieving considerable reductions in drifts a nd accelerations. In contrast, for buildings of lower height (5 and 10 stories), 5% mass in the TMD proved to be adequate to improve structural behavior without compromising its effectiveness. In conclusion, this study emphasizes the need to tailor the des ign and implementation of TMD according to the specific characteristics of each building to optimize their effectiveness in seismic risk mitigation. These findings provide a solid foundation for future research and practical applications in the field of ea rthquake engineering, underscoring the importance of meticulously considering the particular conditions of each structure when implementing vibration control devices such as TMD.