Seismic Performance of Tall Buildings with Impact Damper under Near and Far-Field Earthquakes

Document Type : Structural Earthquake Engineering

Authors

1 University of Tehran

2 Khuzestan University, Ahwaz

Abstract

Impact dampers are considered among passive control devices. Experimental and analytical research studies have shown that this group of nonlinear dampers has a better performance for reducing structural vibrations as compared to linear vibrating neutralizers. Tall building is a structure that is different from other buildings in design aspects, construction, and operation due to its height. Medium height and tall models are used in the present paper in order to compare the performance of impact dampers in tall buildings. In this study, seismic performance of tall buildings with impact dampers is evaluated by using SAP2000 software. The condition of tall buildings with impact dampers is subsequently introduced. In order to achieve more desirable results for tall buildings subjected to seismic vibration, the earthquake records applied to multi degree of freedom systems are selected from both near and far-field seismic events. This study aims to represent how the impact damper operates in tall buildings and to determine the best location for its installation in order to reduce the response of vibrating system. Using nonlinear time history analysis, structural elements have been investigated based on AISC360-10 regulation in the design process. Among the results obtained in this research, reduction in the response of multi-degree-of-freedom systems in vibration condition using impact damper placed on the top floor can be mentioned. Moreover, it was observed that the more the frame height and its number of spans, the better the effect of placing impact damper in a story close to the roof as compared to placing itin the middle stories, which is due to the combination of vibration modes.

Keywords


  1. Chalmers, R. and Semercigil, S.E. (1991) Impact damping the second mode of a cantilevered beam.
  2. Journal of Sound and Vibrations, 146, 157-161.
  3. Lieber, P. and Jensen, D.P. (1945) An acceleration damper: development, design and some applications. Transactions of ASME, 67, 523-530.
  4. Masri, S.F., Miller, K.R., Dehghanyar, T.J., and Caughey, T.K. (1989) Active parameter control of nonlinear vibrating structures. Journal of Applied Mechanics, 56, 658-666.
  5. Zahrai, S.M. and Rod, A.F. (2009) Effect of impact damper on SDOF system vibration under harmonic and impulsive excitations. Journal of Physics: Conference Series, 181.
  6. Afsharifard, A. (2007) Application of Impact Dampers to Reduce Vibrations of Structures. M.Sc. Thesis, Mechanical Engineering Group, Ferdowsi University, Mashhad, Iran.
  7. Dehghan-Niri, E., Zahrai, S.M., and Rod, A.F. (2012) Numerical studies of the conventional impact damper with discrete frequency optimization and uncertainty considerations. Scientia Iranica, 19(2), 166-178.
  8. Afsharfard, A. and Farshidianfar, A. (2012) Design of nonlinear impact dampers based on acoustic and damping behavior. International Journal of Mechanical Sciences, 65(1), 125-133.
  9. Jam, J.E. and Afsharifard, A. (2013) Application of single unit impact dampers to reduce undesired vibration of the 3R robot arms. International Journal of Aerospace Sciences, 2, 49-54.
  10. Zahrai, S.M. and Rod, A.F. (2014) Shake table tests of using single-particle impact damper to reduce seismic response. Asian Journal of Civil Engineering, BHRC, 16(3), 471-487.
  11. Goel, V., Bhave, S.Y., and Razdan, S. (2014) An experimental study on impact dampers. International Journal of Science, Environment and Technology, 3(5), 1738-1746.
  12. Lampart, M. and Zapomel, J. (2014) Dynamics and Efficiency of an Impact Damper. Nostradamus: Prediction, Modeling and Analysis of Complex Systems. Volume 289 of the series Advances in Intelligent Systems and Computing, 355-364.
  13. Afsharifard, A. and Farshidianfar, A. (2014) Application of single unit impact dampers to harvest energy and suppress vibrations. Journal of Intelligent Material Systems and Structures, First published on May 14.
  14. Philipp, E. and Luca, C. (2014) Analytical and experimental investigation on a multiple-mass element pendulum impact damper for vibration mitigation. Journal of Sound and Vibration, 353, 38-57.
  15. Sanap, S.B., Bhave, S.Y., and Awasare, P.J. (2015) Impact damper for axial vibration of a continuous system. Proceedings of the Institution of Mechanical Engineers, Part C. Journal of Mechanical Engineering Science, 230, 2145-2157.
  16. Gharib, M. and Karkoub, M. (2015) Passive multi-degree-of-freedom structural control using LPC impact dampers. ASME 2015 International Mechanical Engineer ing Congress and Exposition, Volume 4B: Dynamics, Vibration, and Control Houston, Texas, USA.
  17. Nakamura, Y. and Watanabe, K. (2016) Effects of balanced impact damper in structures subjected to walking and vertical seismic excitations. Earthquake Engineering and Structural Dynamics, 45(1), 113-128.