Tuning fire suppression tanks for tuned sloshing damper applications
Modern tall buildings are often susceptible to excessive wind-induced motions.Tuned sloshing dampers(TSDs)are frequently used to improve occupant comfort in tall buildings by reducing structural accelerations.A TSD consists of a tank that is partially filled with water and located near the top of a building.As the building experiences a resonant response due to wind loading,the water within the TSD tank will begin to slosh.Vibrational energy is thereby transferred from the building to the sloshing liquid,where it can be dissipated by damping mechanisms within the tank,resulting in reduced building motion.For a TSD to perform effectively,it is critical that the tank has the proper ratio of water depth to tank length.Code requirements often necessitate that large tanks of water be located at the top of highrise buildings for fire suppression.Researchers have long suggested that these tanks could also function as TSDs.In practice,it is challenging to design a tank that simultaneously 1)fits within the allocated building plan area,2)achieves the minimum water volume for fire suppression,and 3)can be properly tuned to the structural frequency.Specifically,it is common that the water volume requirements for fire suppression demand a water depth that is significantly greater than that required for proper TSD tuning.This paper presents three methods to enable tanks to function as fire suppression tanks and TSD tanks.First,a model for tanks of irregular plan geometry is presented,which enables fire suppression tanks of irregular geometry to be practically modelled as a TSD.Next,two methods are presented which enable the total water volume to be increased when the TSD optimal water depth is not sufficient to achieve the minimum volume requirements for fire suppression.These methods employ bottom-mounted baffles as well as a holey false floor.Shake table testing is conducted to evaluate how these mechanisms affect the sloshing frequency and damping of the TSD.The results show that these techniques can increase the potential of using fire suppression tanks for structural control.
Tuned sloshing damper Sloshing frequency Fire suppression Shake table testing Baffles
J.Shayne Love Dan Li Xiangdong Du
RWDI Inc.,Guelph,Canada RWDI China Inc.,Shanghai,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1197-1206
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）