Optimal Design of Passive Tuned Damper for Buildings under Wind Excitation

• Main Authors: Liu, Chien Hung, 劉建宏
• Other Authors: Ueng, Jin Min
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/34156106216294810668

碩士 === 國立中興大學 === 土木工程學系 === 89 === Wind-induced vibration affects structural safety and comfort of occupants greatly. Passive Tuned Mass Dampers (PTMD) as an energy dissipating device can be used to increase the overall damping of the main structure and accordingly to reduce the wind-induced building vibration. In this study, PTMD is utilized to reduce aerodynamic response of structures. In the past, simplified formulas for determining the optimal parameters are proposed so that the design of a PTMD can be carried out easily. With the considerations of the power spectral density function of wind force, the optimal PTMD’s system parameters are determined by minimizing the mean-square acceleration response ratio of the controlled degree-of-freedom between the building with and without PTMD. Lead into wind excitation, optimal design of wind-induced vibration control of frame structures is investigated. The calculated results show that the difference between the optimal design and simplified formulas design is not significant. Furthermore, PTMD still has high efficiency in reducing vibration when structure and wind excitation are in resonance. For a given PTMD’s mass ratio, it is found that the PTMD’s optimal parameters change slightly for structures with different period.