Development of a Water Supplement System for a Tuned Liquid Damper under Excitation

Abstract

Integrating existing liquid storage and supply tanks in buildings with tuned liquid dampers (TLDs) are significant for reducing the effective cost of TLDs. However, existing water supplement devices for fire-suppression liquid tanks may overfill with water, which leads to TLD mistuning. To overcome this problem, a passive liquid control system named TLD with a stable replenishment sub-tank system (TLD-SRS) is proposed. The system, which consists of an additional sub-tank connected to the main tank and a floating ball, replenishes liquid in the TLD automatically. The system can avoid vibration interference and maintain the normal operation of the passive replenishment system under usual wind loads. According to the studies of tuned liquid column dampers (TLCD), the proposed TLD with a stable replenishment sub-tank system (TLD-SRS) uses simple devices to ensure that the liquid level in the TLD is steady at the target liquid level with a floating ball. The TLD-SRS is verified on a large-scale TLD shaking table experiment. The overshoot, which is the percentage of liquid that exceeds the target volume of TLD is calculated during sloshing with wind loads. Compared with TLD installed with a regular liquid replenishment device, the proposed TLD-SRS significantly reduces the overshoot of liquid and acceleration on the roof of the building.

Liquid Sloshing in Soil-Supported Multiple Cylindrical Tanks Equipped with Baffle under Horizontal Excitation

“…Γ m f1 and Γ m f2 represent the free surfaces, respectively. φ m i should conform to the Laplace equation: In Figure 3, on the basis of the subdomain partition technique, the whole liquid domain can be divided into the subdomains ( 1,2,3,4).…”

“…Zhao et al [1] utilized an improved smoothed finite-element approach to simulate large LNG tanks with excellent accuracy and efficiency. Xiao et al [2] developed a liquid supplement system for the tuned liquid damper undergoing loads. Cheng et al [3] employed the shake table test to investigate responses of concrete tanks undergoing near-field and far-field seismic actions.…”

Experimental Investigation to Evaluate the Dynamic Properties of a Scaled Rectangular Tuned Liquid Damper Using High-Speed Videos

“…Poguluri and Cho [26] used high-speed videos to compare the sloshing behavior of a rectangular tank with the results obtained from numerical analysis based on computational fluid dynamics (CFD). More recently, experimental investigations have been developed in which the performance of structures equipped with TLDs has been measured using high-definition videos to verify the response of both the main system and the auxiliary device [27,28]. The previous studies provided a forward step towards the understanding of the use of high-speed cameras to study dynamic systems; however, the use of high-speed videos to identify dynamic properties of TLDs in dynamic tests has not been reported in the literature.…”