Smart Structures and Systems

  • 제24권3호
  • /
  • Pages.391-401
  • /
  • 2019
  • /
  • 1738-1584(pISSN)
  • /
  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Shaking table tests on a SDOF structure with cylindrical and rectangular TLDs having rotatable baffles

  • Zahrai, Seyed Mehdi (Center of Excellence for Engineering and Management of Infrastructures, School of Civil Engineering, College of Engineering, University of Tehran) ;
  • Kakouei, Sirous (School of Civil Engineering, University of Tehran)
  • 투고 : 2018.07.24
  • 심사 : 2019.07.29
  • 발행 : 2019.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Control of vibrations against extraordinary excitations such as wind and earthquake is very important to the protection of life and financial concerns. One of the methods of structural control is to use Tuned Liquid Damper (TLD), however due to the nature of TLD only one sloshing frequency can be created when the water is sloshing. Among various ideas proposed to compensate this problem, by changing the angle of some rotatable baffles embedded inside a TLD, a frequency range is created such that these baffles are tuned manually at different frequencies. In this study, the effect of cross sectional shape of container with rotating baffles on seismic behavior of TLD is experimentally studied. For this purpose, rectangular and cylindrical containers are designed and used to suppress the vibrations of a Single Degree-Of-Freedom (SDOF) structure under harmonic and earthquake excitations considering three baffle angles. The results show that the rectangular-shaped damper reduces the structural response in all load cases more than the damper with a cylindrical shape, such that maximum differences of two dampers to reduce the structural displacement and structural acceleration are 5.5% and 3% respectively, when compared to the cases where no baffles are employed.

키워드

참고문헌

  1. Banerji, P., Murudi, M., Shah, A.H. and Popplewell, N. (2000), "Tuned liquid dampers for controlling earthquake response of structures", Earthq. Eng. Struct. D., 29(5), 587- 602. https://doi.org/10.1002/(SICI)1096-9845(200005)29:5<587::AID-EQE926>3.0.CO;2-I.
  2. Bhosale, A.D. and Murudi, M.M. (2017), "Seismic control of structures using sloped bottom tuned liquid dampers", Struct. Eng. Mech., 64(2), 233-241. https://doi.org/10.12989/sem.2017.64.2.233.
  3. Biswal, K.C., Bhattacharyya, S.K. and Sinha, P.K. (2003), "Freevibration analysis of liquid-filled tank with baffles", J. Sound Vib., 259(1), 177-192. https://doi.org/10.1006/jsvi.2002.5087.
  4. Biswal, K.C., Bhattacharyya, S.K. and Sinha, P.K. (2004), "Dynamic response analysis of a liquid-filled cylindrical tank with annular baffle", J. Sound Vib., 274(1-2), 13-37. https://doi.org/10.1016/S0022-460X(03)00568-6.
  5. Cheng, C.W., Lee, H.H. and Luo, Y.T. (2015), "Experimental study of controllable MR-TLCD applied to the mitigation of structure vibration", Smart Struct. Syst., 15(6), 1481-1501. http://dx.doi.org/10.12989/sss.2015.15.6.1481.
  6. Crowley, S. and Porter, R. (2012), "An analysis of screen arrangements for a tuned liquid damper", J. Fluid. Struct., 34, 291-309. https://doi.org/10.1016/j.jfluidstructs.2012.06.001.
  7. Fujino, Y., Sun, L., Pacheco, B.M. and Chaiseri, P. (1992), "Tuned liquid damper (TLD) for suppressing horizontal motion of structures", J. Eng. Mech., 118(10), 2017-2030. https://doi.org/10.1061/(ASCE)0733-9399(1992)118:10(2017).
  8. Housner, G.W., Bergman, L.A., Caughey, T.K., Chassiakos, A.G., Claus, R.O., Masri, S.F., Skelton, R.E., Soong, T.T., Spencer, B.F. and Yao, J.T.P. (1997), "Structural control: past, present and future", J. Eng. Mech., 123(9), 897-971. https://doi.org/10.1061/(ASCE)0733-9399(1997)123:9(897).
  9. Lee, H.H. and Juang, H.H. (2012), "Experimental study on the vibration mitigation of offshore tension leg platform system with UWTLCD", Smart Struct. Syst., 9(1), 71-104. http://dx.doi.org/10.12989/sss.2012.9.1.071.
  10. Love, J.S. and Tait, M.J. (2011), "Non-linear multimodal model for tuned liquid dampers of arbitrary tank geometry", J. Nonlinear Mech., 46(8), 1065-1075. https://doi.org/10.1016/j.ijnonlinmec.2011.04.028.
  11. Marsh, A.P., Prakash, M., Semercigil, S.E. and Turan, O.F. (2010), "A shallow-depth sloshing absorber for structural control", J. Fluid. Struct., 26(5), 780-792. https://doi.org/10.1016/j.jfluidstructs.2010.03.006.
  12. Sun, L.M., Fujino, Y., Pacheco, B.M. and Chaiseri, P. (1991), "Modeling of tuned liquid damper (TLD)", J. Wind Eng. Ind. Aerod., 43(1-3), 1883-1894. https://doi.org/10.1016/0167-6105(92)90609-E.
  13. Tait, M.J., El Damatty, A.A., Isyumov, N. and Siddique, M.R. (2005), "Numerical flow models to simulate tuned liquid damper (TLD) with slatted screen", J. Fluid. Struct., 20(8), 1007-1023. https://doi.org/10.1016/j.jfluidstructs.2005.04.004.
  14. Zahrai, S.M., Abbasi, S., Samali, B. and Vrcelj, Z. (2012), "Experimental investigation of utilizing TLD with baffles in a scaled down 5-story benchmark building", J. Fluid. Struct., 28, 194-210. https://doi.org/10.1016/j.jfluidstructs.2011.08.016.
  15. Zahrai, S.M., Enayati, E. (2017), "A variably baffled Tuned Liquid Damper to reduce seismic response of a 5-story building", J. Struct. Build., 170(10), 1-10. https://doi.org/10.1680/jstbu.16.00034.

피인용 문헌

  1. Analysis of nonlocal Kelvin's model for embedded microtubules: Via viscoelastic medium vol.26, pp.6, 2020, https://doi.org/10.12989/sss.2020.26.6.809