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A tuned liquid mass damper implemented in a deep liquid storage tank for seismic vibration control of short period structures
Deep liquid storage tanks cannot be implemented as tuned liquid damper (TLD) as the depth ratios often exceed the limit (0.3) for nonlinear sloshing and wave breaking. This study exploits the impulsive liquid mass to implement a tuned liquid mass damper (TLMD) by flexibly attaching the tank to the structure. The flexible mounting allows tuning of vibration of the impulsive mass to short period structures. The small, suboptimally tuned sloshing mass may also have minor contribute in dissipation. The performance of the TLMD is demonstrated by simulation and shake table experiments. The simulation involves solution of the governing equations for the structure‐TLMD system, in which the vibration of liquid is described by the Housner model. The optimal parameters for tuning are obtained through optimization. The dynamic response evaluation employs a suite of far field, recorded ground motions of varying hazard levels to demonstrate robustness. The simulation and the experiment results corroborate well. Comparative assessments with TMD and TLD with identical mass ratios show comparable efficiency. Given that the stored liquid is employed for the functional purpose (unlike the added mass in TMD), the proposed TLMD may be a preferred alternative to conventional tuned mass damper (TMD) or TLD.
A tuned liquid mass damper implemented in a deep liquid storage tank for seismic vibration control of short period structures
Deep liquid storage tanks cannot be implemented as tuned liquid damper (TLD) as the depth ratios often exceed the limit (0.3) for nonlinear sloshing and wave breaking. This study exploits the impulsive liquid mass to implement a tuned liquid mass damper (TLMD) by flexibly attaching the tank to the structure. The flexible mounting allows tuning of vibration of the impulsive mass to short period structures. The small, suboptimally tuned sloshing mass may also have minor contribute in dissipation. The performance of the TLMD is demonstrated by simulation and shake table experiments. The simulation involves solution of the governing equations for the structure‐TLMD system, in which the vibration of liquid is described by the Housner model. The optimal parameters for tuning are obtained through optimization. The dynamic response evaluation employs a suite of far field, recorded ground motions of varying hazard levels to demonstrate robustness. The simulation and the experiment results corroborate well. Comparative assessments with TMD and TLD with identical mass ratios show comparable efficiency. Given that the stored liquid is employed for the functional purpose (unlike the added mass in TMD), the proposed TLMD may be a preferred alternative to conventional tuned mass damper (TMD) or TLD.
A tuned liquid mass damper implemented in a deep liquid storage tank for seismic vibration control of short period structures
Pandey, Dhirendra K. (author) / Mishra, Sudib K. (author) / Chakraborty, Subrata (author)
2022-06-10
22 pages
Article (Journal)
Electronic Resource
English
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