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Tuned liquid column dampers with adaptive tuning capacity for structural vibration control

  • Shum, K.M. (Department of Civil and Structural Engineering, Hong Kong Polytechnic University) ;
  • Xu, Y.L. (Department of Civil and Structural Engineering, Hong Kong Polytechnic University)
  • Received : 2004.05.11
  • Accepted : 2005.04.22
  • Published : 2005.07.30

Abstract

The natural frequencies of a long span bridge vary during its construction and it is thus difficult to apply traditional tuned liquid column dampers (TLCD) with a fixed configuration to reduce bridge vibration. The restriction of TLCD imposed by frequency tuning requirement also make it difficult to be applied to structure with either very low or high natural frequency. A semi-active tuned liquid column damper (SATLCD), whose natural frequency can be altered by active control of liquid column pressure, is studied in this paper. The principle of SATLCD with adaptive tuning capacity is first introduced. The analytical models are then developed for lateral vibration of a structure with SATLCD and torsional vibration of a structure with SATLCD, respectively, under either harmonic or white noise excitation. The non-linear damping property of SATLCD is linearized by an equivalent linearization technique. Extensive parametric studies are finally carried out in the frequency domain to find the beneficial parameters by which the maximum vibration reduction can be achieved. The key parameters investigated include the distance from the centre line of SATLCD to the rotational axis of a structure, the ratio of horizontal length to the total length of liquid column, head loss coefficient, and frequency offset ratio. The investigations demonstrate that SATLCD can provide a greater flexibility for its application in practice and achieve a high degree of vibration reduction. The sensitivity of SATLCD to the frequency offset between the damper and structure can be improved by adapting its frequency precisely to the measured structural frequency.

Keywords

References

  1. Gao, H., Kwok, K.C.S. and Samali, B. (1997), 'Optimization of tuned liquid column dampers', Eng. Struct., 19(6), 476-486 https://doi.org/10.1016/S0141-0296(96)00099-5
  2. Gao, H., Kwok, K.C.S. and Samali, B. (1999), 'Characteristics of multiple tuned liquid column dampers in suppressing structural vibration', Eng. Struct., 21(4), 316-331 https://doi.org/10.1016/S0141-0296(97)00183-1
  3. Haroun, M.A., Pires, J.A., and Won, A.Y.J. (1996), 'Suppression of environmental-induced vibrations in tall buildings by hybrid liquid column dampers', The Structural Design of Tall Buildings, 5(1), 45-54 https://doi.org/10.1002/(SICI)1099-1794(199603)5:1<45::AID-TAL58>3.0.CO;2-F
  4. Hitchcock, P.A., Kwok, K.C.S. and Watkins, R.D. (1997a), 'Characteristics of liquid column vibration absorbers (LCVA) - I', Eng. Struct., 19(2), 126-134 https://doi.org/10.1016/S0141-0296(96)00042-9
  5. Hitchcock, P.A., Kwok, K.C.S. and Watkins, R.D. (1997b), 'Characteristics of liquid column vibration absorbers (LCVA) - II', Eng. Struct., 19(2), 135-144 https://doi.org/10.1016/S0141-0296(96)00044-2
  6. Jelali, M. and Kroll, A. (2003), Hydraulic Servo-systems: Modelling, Identification and Control, New York, Springer
  7. Kagawa, K., Koukawa, H., Fujita, K., Zensho, Y. and Matsuo, M. (1989), 'Development of tuned liquid damper for ship vibration', Transactions of the West-Japan Society of Naval Architects, 78, 251-258
  8. Kareem, A. (1994), 'The next generation of tuned liquid dampers', Proc. of the First World Conf. on Structural Control, I, Los Angeles, FA1. USA: IASC, 69-78
  9. Sakai, F., Takaeda, S. and Tamaki, T. (1989), 'Tuned liquid column damper - new type device for suppression of building vibration', Proc. Int. Conf. On High-rise Building, Nanjing, China, 926-931
  10. Shinozuka, M. (1972), 'Digital simulation of random process and its application', J. Sound Vib., 25(1), 111-128 https://doi.org/10.1016/0022-460X(72)90600-1
  11. Xu, Y.L., Samali, B. and Kwok, K.C.S. (1992), 'Control of along-wind response of structures by mass and liquid dampers', J. Eng. Mech., ASCE, 118(1), 20-39 https://doi.org/10.1061/(ASCE)0733-9399(1992)118:1(20)
  12. Xu, Y.L. and Shum, K.M. (2003), 'Multiple tuned liquid column dampers for torsional vibration control of structures: theoretical investigation', Earthq. Eng. Struct. Dyn., 32(2), 309-328 https://doi.org/10.1002/eqe.227
  13. Xue, S.D., Ko, J.M. and Xu, Y.L. (2000), 'Tuned liquid column damper for suppressing pitching motion of structures', Eng. Struct., 22(11), 1538-1551 https://doi.org/10.1016/S0141-0296(99)00099-1
  14. Yalla, S.K., Kareem, A. and Kantor, J.C. (2001), 'Semi-active tuned liquid column dampers for vibration control of structures', Eng. Struct., 23(11), 1469-1479 https://doi.org/10.1016/S0141-0296(01)00047-5

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