Structural Engineering and Mechanics

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Passive, semi-active, and active tuned-liquid-column dampers

  • Chen, Yung-Hsiang (Department of Civil Engineering, National Taiwan University) ;
  • Ding, Ying-Jan (Construction and Planning Agency, Ministry of the Interior)
  • Received : 2007.04.06
  • Accepted : 2008.06.03
  • Published : 2008.09.10
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Abstract

The dynamic characteristics of the passive, semi-active, and active tuned-liquidcolumn dampers (or TLCDs) are studied in this paper. The design of the latter two are based on the first one. A water-head difference (or simply named as water head in this paper) of a passive TLCD is pre-set to form the so-called semi-active one in this paper. The pre-set of water head is released at a proper time instant during an earthquake excitation in order to enhance the vibration reduction of a structure. Two propellers are installed along a shaft inside and at the center of a passive TLCD to form an active one. These two propellers are driven by a servo-motor controlled by a computer to provide the control force. The seismic responses of a five-story shear building with a passive, semiactive, and active TLCDs are computed for demonstration and discussion. The responses of this building with a tuned mass damper (or TMD) are also included for comparison. The small-scale shaking-table experiments of a pendulum-like system with a passive or active TLCD to harmonic and seismic excitations are conducted for verification.

Keywords

References

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  2. Nonlinear Dynamic Characteristics of Rectangular and Cylindrical TLDs vol.144, pp.9, 2018, https://doi.org/10.1061/(ASCE)EM.1943-7889.0001510
  3. An adaptive tuned mass damper based on the emulation of positive and negative stiffness with an MR damper vol.20, pp.1, 2008, https://doi.org/10.1088/0964-1726/20/1/015012