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Passive control of seismically excited structures by the liquid column vibration absorber

  • Konar, Tanmoy (Department of Civil Engineering, Bengal Engineering and Science University) ;
  • Ghosh, Aparna Dey (Department of Civil Engineering, Bengal Engineering and Science University)
  • 투고 : 2009.07.20
  • 심사 : 2010.07.30
  • 발행 : 2010.11.30

초록

The potential of the liquid column vibration absorber (LCVA) as a seismic vibration control device for structures has been explored in this paper. In this work, the structure has been modeled as a linear, viscously damped single-degree-of-freedom (SDOF) system. The governing differential equations of motion for the damper liquid and for the coupled structure-LCVA system have been derived from dynamic equilibrium. The nonlinear orifice damping in the LCVA has been linearized by a stochastic equivalent linearization technique. A transfer function formulation for the structure-LCVA system has been presented. The design parameters of the LCVA have been identified and by applying the transfer function formulation the optimum combination of these parameters has been determined to obtain the most efficient control performance of the LCVA in terms of the reduction in the root-mean-square (r.m.s.) displacement response of the structure. The study has been carried out for an example structure subjected to base input characterized by a white noise power spectral density function (PSDF). The sensitivity of the performance of the LCVA to the coefficient of head loss and to the tuning ratio have also been examined and compared with that of the liquid column damper (LCD). Finally, a simulation study has been carried out with a recorded accelerogram, to demonstrate the effectiveness of the LCVA.

키워드

참고문헌

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피인용 문헌

  1. Analysis of tuned liquid column damper nonlinearities 2018, https://doi.org/10.1016/j.engstruct.2018.01.015
  2. Bimodal vibration control of seismically excited structures by the liquid column vibration absorber vol.19, pp.3, 2013, https://doi.org/10.1177/1077546311430718
  3. Characterisation of instantaneous dynamic parameters in vibration analysis of tuned liquid column dampers vol.90, pp.1, 2017, https://doi.org/10.1007/s11071-017-3690-z
  4. Telescopic columns as a new base isolation system for vibration control of high-rise buildings vol.3, pp.6, 2010, https://doi.org/10.12989/eas.2012.3.6.853
  5. Optimum LCVA for suppressing harmonic vibration of damped structures vol.20, pp.4, 2010, https://doi.org/10.12989/sss.2017.20.4.461