# TLCD와 TSD를 이용한 새로운 형태의 양방향 감쇠기 설계변수

• 민경원 (단국대학교 건축대학 건축공학과)
• Published : 2009.08.20

#### Abstract

A new type bi-directional damper using a tuned liquid column damper(TLCD) and a tuned sloshing damper(TSD) is introduced in this study. Two dampers are usually needed to reduce wind-induced responses of tall buildings since they are along and across wind ones. The proposed damper has the advantage of controlling both responses with one damper. One of objectives of this study is to derive analytical dynamics to investigate coupled effects due to TLCD and TSD. Another objective is to address the effect of coupled control force due to TLCD and TSD on the dynamic characteristic of the damper based on analytical dynamics. Shaking table test is undertaken to experimentally grasp dynamic characteristics of the damper under white noise excitation. Its dynamic characteristic is expressed by the transfer function from the shaking table acceleration to the control force generated from the damper. Finally, its design parameters are identified based on the coupled dynamics, which include the mass ratio of horizontal liquid column to total liquid for a TLCD, the participation factor of the fundamental liquid sloshing for a TSD and damping ratio for both cases.

#### References

1. Simiu, E. and Scanlan, R. H., 1996, "Wind Effects on Structure," John Wiley & Sons
2. Lee, S. K., Min, K. W. and Park, E., 2008, "Dynamic Characteristic of A Bi-dirctinal Damper Using A Tuned Mass Damper and A Tuned Liquid Column Damper," Journal of the Computational Structural Engineering Institute of Korea, Vol. 21, No. 6, pp. 589-596
3. Min, K. W. and Park, E., 2009, "Dynamic Characteristic of Tuned Liquid Column Damper Using Shaking Table Test," Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 19, No. 6, pp. 620-627 https://doi.org/10.5050/KSNVN.2009.19.6.620
4. Sakai, F., Takaeda, S. and Tamaki, T., 1989, "Tuned Liquid Column Damper - New Type Device for Suppression of Building Vibrations," Proc. Int. Conf. on Highrise Buildings, Nanjing, China, pp.926-931
5. Wen, Y. K., 1980, "Equivalent Linearization for Hysteretic Systems under Random Excitation," Journal of Applied Mechanics, Vol. 47, pp. 150-154 https://doi.org/10.1115/1.3153594
6. Sun, L. M., Fujino, Y., Pacheco, B. M. and Chaiseri, P., 1995, "Modelling of Tuned Liquid Damper(TLD)," Journal of Wind Engineering and Industrial Aerodynamics, Vol. 43(1/3), pp. 1883-1894 https://doi.org/10.1016/0167-6105(92)90609-E
7. Chang, C. C. and Qu, W. L., 1998, "Unified Dynamic Absorber Design Formulas for Windinduced Vibration Control of Tall Buildings," The Structural Design of Tall Buildings, Vol. 7, No. 2, pp. 147-166 https://doi.org/10.1002/(SICI)1099-1794(199806)7:2<147::AID-TAL107>3.0.CO;2-3
8. Tait, M. J., 2008, "Modelling and Preliminary Design of a Structure-TLD System," Engineering Structures, Vol. 30, No. 10, pp. 2644-2655 https://doi.org/10.1016/j.engstruct.2008.02.017
9. The Math Works, Inc, 2007, Simulink Reference, MATLAB${\circledR}$ SIMULINK${\circledR}$