Abstract
Current trends in the construction industry demand taller and lighter structures, which are also more flexible. Tuned liquid dampers (TLDs) are a relatively newer concept that can be used to reduce wind or seismic induced vibrations prevalent in these structures. TLD is essentially a liquid filled tank that uses liquid sloshing action to dampen the oscillations of a structure. They are cost effective and have low maintenance compared to dynamic vibration absorbers that are commonly used in flexible and lightly damped structures. This research used experiments employing models and software simulations to understand the effect of tank shape on the effectiveness of a roof mounted TLD that uses water as liquid damper media. Experimental investigations were carried out on a scaled model of single bay two storied structure using a shake table with harmonic sinusoidal input of 0.16 g at a frequency of 1 Hz. The effects of four different tank shapes using water depths corresponding to frequency ratios varying from 0.8 to 1.35 were investigated using this setup. The performance of each tank shape was compared with that of the rectangular tank. Further, the experimental results were compared with a numerical model developed in SAP 2000. The studies indicated that the shape of the tank plays an important role in the response reduction, and the sloped bottom tank was the most effective among the different shapes used. TLDs with different tank shapes may be effectively implemented as a damping mechanism through further research.
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Kiran, N.K., Unni Kartha, G., Nair, N. (2023). A Study on the Effect of Tank Shape on the Performance of Tuned Liquid Dampers. In: Saha, S., Sajith, A.S., Sahoo, D.R., Sarkar, P. (eds) Recent Advances in Materials, Mechanics and Structures. Lecture Notes in Civil Engineering, vol 269. Springer, Singapore. https://doi.org/10.1007/978-981-19-3371-4_21
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