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Modified Tuned Liquid Damper for Vibration Control of Short Period Structures
Tuning of structures of short periods to the long period sloshing liquid of a tune liquid damper (TLD) possess difficulty. However, proper tuning of the tuned damper devices is must for the desired control efficiency. To overcome this difficulty, a new implementation is proposed contrary to the conventional rigidly connected TLD with relatively shallow water depth. Presently, flexible pads with lower time period of vibration are inserted between the structure and the TLD, for which, the depth of the liquid in water tank may allow to be relatively high. The frequency of the container (inclusive of impulsive mass of the liquid) vibration is tuned to the fundamental frequency of the structure, which is observed to allow sufficient sloshing. The elastomeric pads are designed for adequate tuning. The performance of the proposed implantation studied numerically. Two short period structures are chosen (0.3 and 0.5 s) for the present study. Six ground motions representing the various seismic hazard levels from SAC ground motion data base are employed as input excitation. The numerical study reveals that the damper system is effectively reducing the response of structure yet it allows a relatively larger depth of water in the tank that can be harnessed for storage purposes as well.
Modified Tuned Liquid Damper for Vibration Control of Short Period Structures
Tuning of structures of short periods to the long period sloshing liquid of a tune liquid damper (TLD) possess difficulty. However, proper tuning of the tuned damper devices is must for the desired control efficiency. To overcome this difficulty, a new implementation is proposed contrary to the conventional rigidly connected TLD with relatively shallow water depth. Presently, flexible pads with lower time period of vibration are inserted between the structure and the TLD, for which, the depth of the liquid in water tank may allow to be relatively high. The frequency of the container (inclusive of impulsive mass of the liquid) vibration is tuned to the fundamental frequency of the structure, which is observed to allow sufficient sloshing. The elastomeric pads are designed for adequate tuning. The performance of the proposed implantation studied numerically. Two short period structures are chosen (0.3 and 0.5 s) for the present study. Six ground motions representing the various seismic hazard levels from SAC ground motion data base are employed as input excitation. The numerical study reveals that the damper system is effectively reducing the response of structure yet it allows a relatively larger depth of water in the tank that can be harnessed for storage purposes as well.
Modified Tuned Liquid Damper for Vibration Control of Short Period Structures
Lecture Notes in Civil Engineering
Sitharam, T. G. (editor) / Kolathayar, Sreevalsa (editor) / Sharma, Mukat Lal (editor) / Pandey, Dhirendra Kumar (author) / Mishra, Sudib Kumar (author)
2021-03-23
12 pages
Article/Chapter (Book)
Electronic Resource
English
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