Particle Tuned Mass Dampers for Wind-Induced Vibration Control in Supertall Building Tower Crowns

This study aims to investigate the performance of Particle Tuned Mass Damper (PTMD) in mitigating wind-induced vibrations in tower crown structures, providing findings to tower crowns with hinged boundary conditions in supertall buildings. A multi-degree-of-freedom (MDOF) model of the tower crown and a PTMD model based on the discrete element method (DEM) are established and validated. The intermediate story is a suitable choice for arranging damping devices in hinged tower crown structures. By analyzing the vibration response of the tower crown structure with PTMD under wind excitation, the study reveals the vibration mitigation effects of PTMD and the particle energy dissipation mechanism. The results indicate that the vibration reduction ratios of peak displacement and acceleration for the tower crown are 12.29% and 14.53%, respectively. Field test experiment shows its effectiveness from another perspective. Additionally, the energy dissipation between particles is the primary method of energy dissipation during collisions, accounting for approximately 80% of the total dissipated energy. Furthermore, the wide tuning frequency band characteristic of PTMD is examined through experimental testing, and its damping performance is compared with traditional Tuned Mass Damper (TMD) and Multiple Tuned Mass Damper (MTMD). Finally, the research findings, limitations, and potential impacts are discussed. This study contributes to advancing the development of tower crowns and their vibration reduction technology.