Vibration control of a structure by a tuned liquid column damper with embossments

Byung Jin Park, Yong Jae Lee, Min Jae Park, Young-Kyu Ju

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Several studies have examined damping mechanisms to improve damping effects in a tuned liquid column damper (TLCD). The additional damping mechanisms include orifices, valves, and the use of highly viscous liquids. In the present study, in contrast to previous studies, a damping mechanism using embossments on the wall of the TLCD was proposed, and TLCD with embossment (termed as ETLCD) was proposed as a new type of passive damper. The study focuses on an experimental evaluation of the dynamic characteristics of ETLCD and vibration control performance for tall buildings with ETLCD by using a shaking table. Thus, a characteristic experiment was performed with the presence of embossments, total length of the liquid column, and an excitation amplitude ratio as variables. Additionally, a scaled model test of the SDOF building composed of a free vibration test and sine sweep forced vibration test was conducted to verify the vibration control performance of the structure with ETLCD. Consequently, the equivalent damping ratios of conventional TLCD and ETLCD were experimentally compared, and the theoretical natural frequency of TLCD was re-evaluated in the characteristic experiment. Furthermore, the results of the scaled model test indicated that the vibration control performance of the ETLCD was superior to that of the conventional TLCD in terms of response reduction, efficiency, and stability.

Original languageEnglish
Pages (from-to)290-299
Number of pages10
JournalEngineering Structures
Volume168
DOIs
Publication statusPublished - 2018 Aug 1

Keywords

  • Damping ratio
  • Embossment
  • Free vibration test
  • Sine sweep
  • Tuned liquid column damper
  • Vibration control

ASJC Scopus subject areas

  • Civil and Structural Engineering

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