VERIFICATION OF VIBRATION CONTROL EFFECT IN ACTUAL STRUCTURE : Study of vibration control damper using sloshing of water (Part 2)

Abstract

The vibration contrQl

A review on various configurations of the passive tuned liquid damper

“…The first real-life installation of a TSD system of intermediate-depth was also in Japan in the Gold Tower at Utazu, Kagawa prefecture in the year 1988 (Noji et al, 1990(Noji et al, , 1991 (see Figure 15(a)). The tower is 158 m tall.…”

“…The TSDs are used to control vibration along the east–west direction along which the maximum width of the building in plan is 15.4 m. There are 16 number of TSDs each having 2.5 m length and 0.45 m width, placed on the floor at 135 m level. The TSD system has increased the structural damping of the tower from 0.35% to 3% (Noji et al, 1991). Here, nets have been used as FDD in the TSDs to get the required level of damping (see Figure 15(b)).…”

“…Here, nets have been used as FDD in the TSDs to get the required level of damping (see Figure 15(b)). This is also the first instance of the use of FDDs to enhance the damping of a TLD in a real-life installation.

Figure 15.Gold Tower in Utazu, Kagawa prefecture, Japan: (a) photograph of the tower (https://commons.wikimedia.org/wiki/Category:Gold_Tower_(Japan)#/media/File:Goldtower01.jpg accessed on 27th June 2021) and (b) sectional elevation of TSDs used (dimensions are in mm) (Noji et al, 1991).

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“…Gold Tower in Utazu, Kagawa prefecture, Japan: (a) photograph of the tower (https://commons.wikimedia.org/wiki/Category:Gold_Tower_(Japan)#/media/File:Goldtower01.jpg accessed on 27th June 2021) and (b) sectional elevation of TSDs used (dimensions are in mm) (Noji et al, 1991). …”

“…TLDs received a surge in attention from researchers, due to the advantages stated earlier, since late 1980s (Chaiseri et al, 1989; Fujino et al, 1988; Kareem and Sun, 1987; Noji et al, 1988; Sakai et al, 1989; Saoka et al, 1988; Sun et al, 1989). It was also realized that despite their certain potentials, there were difficulties that were needed to be overcome for improved TLD performance, such as in the quantitative specification of the supplemental damping being afforded to the primary structure and applicability to short-period structures.…”