Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Study on Elevator Induced Structural Vibration Reduction Performance Using Polymer Concrete

폴리머 콘크리트를 이용한 엘리베이터 기인 구조 진동저감 성능 연구

  • Received : 2021.10.15
  • Accepted : 2021.12.06
  • Published : 2021.12.31
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Abstract

With the increased interest on quiescent place for residential place, the noise generation from facilities needs to be minimized. One important noise source include sounds from operation of elevators. The elevator operates between floors and generates significantly annoying sounds to the nearby living spaces. It is recognized as the significant contributor inducing noise annoyance to residents. Elevator is supported to the building structure at several locations for movements between floors. In this study, the vibration reduction by use of polymer concrete on the support location was demonstrated. By measuring and comparing the vibration generation when supported on cement and polymer concrete, the noise reduction performance was evaluated. The polymer concrete was made in the form of being inserted into the wall that imitates the hoistway. The impact vibration was induced to the bracket and vibration transfer magnitude was measured. The damping ratio was evaluated through normalization and curve fitting of transient response, and comparison was performed for each resin mixing ratio. By use of polymer concrete, it was possible to reduce the vibration generation in an effect manner without sacrifice on the structural rigidity.

주거지에서의 정숙함에 대한 관심이 높아짐에 따라 구조물에서 발생하는 소음을 최소화할 필요가 있다. 중요한 소음원 중 하나는 엘리베이터 작동 소음이다. 엘리베이터는 층 사이에서 작동하며 인근 생활 공간에 상당히 성가신 소리를 생성한다. 입주민들에게 성가심을 유발하는 주요 소음원으로 인식되고 있다. 엘리베이터는 층간 이동을 위해 여러 위치에서 건물 구조에 지지되어 있다. 본 연구에서는 지지 위치에 폴리머 콘크리트를 사용하여 진동을 감소시키는 것을 실증하였다. 시멘트 콘크리트와 폴리머 콘크리트에 지지했을 때의 진동 발생량을 측정 및 비교하여 소음 저감 성능을 평가하였다. 폴리머 콘크리트는 승강로를 모방한 벽에 삽입되는 형태로 제작되었다. 브라켓에 충격진동을 인가하고 진동전달크기를 측정하였다. 감쇠비는 과도응답의 정규화 및 곡선맞춤을 통해 평가하였고, 각 레진 혼합 질량비에 대하여 비교하였다. 폴리머 콘크리트를 사용하여 구조적 강성에 대한 손실 없이 효과적인 방식으로 진동 발생을 감소시킬 수 있다.

Keywords

Acknowledgement

이 연구는 국토교통부 국토교통기술촉진연구사업의 연구비지원(21CTAP-C153015-03)에 의해 수행되었습니다.

References

  1. Igolkin, A., Rodionov, L., Balyaba, M., and Rodionova, E. (2020, September), Elevator Equipment Noise Reduction in Multi-Apartment Buildings. In 2020 International Conference on Dynamics and Vibroacoustics of Machines (DVM) (pp. 1-5). IEEE.
  2. Oh, Y., Kang, M., Lee, K., and Kim, S. (2020), Construction management solutions to mitigate elevator noise and vibration of high-rise residential buildings. Sustainability, 12(21), 8924. https://doi.org/10.3390/su12218924
  3. Ahn, S., Jeon, E. B., Koh, H. I., Kim, H. S., and Park, J. (2016), Identification of stiffness distribution of fatigue loaded polymer concrete through vibration measurements. Composite Structures, 136, 11-15. https://doi.org/10.1016/j.compstruct.2015.09.026
  4. Ahn, S., Kwon, S., Hwang, Y. T., Koh, H. I., Kim, H. S., and Park, J. (2019), Complex structured polymer concrete sleeper for rolling noise reduction of high-speed train system. Composite Structures, 223, 110944. https://doi.org/10.1016/j.compstruct.2019.110944
  5. Kim, J. J., and Shim, H. B. (2019), Experimental Study on Vibration Reduction Characteristics of Polymer Concrete. Journal of the Korea Institute for Structural Maintenance and Inspection, 23(7), 58-65. https://doi.org/10.11112/JKSMI.2019.23.7.58
  6. Bedi, R., Chandra, R., and Singh, S. P. (2014), Reviewing some properties of polymer concrete. Indian Concrete Journal, 88(8), 47-68.
  7. Golestaneh, M., Amini, G., Najafpour, G. D., and Beygi, M. A. (2010), Evaluation of mechanical strength of epoxy polymer concrete with silica powder as filler. World Applied Sciences Journal, 9(2), 216-220.
  8. Niaki, M. H., Fereidoon, A., and Ahangari, M. G. (2018), Experimental study on the mechanical and thermal properties of basalt fiber and nanoclay reinforced polymer concrete. Composite Structures, 191, 231-238. https://doi.org/10.1016/j.compstruct.2018.02.063
  9. Jeon, E. B., Ahn, S., Lee, I. G., Koh, H. I., Park, J., and Kim, H. S. (2015), Investigation of mechanical/dynamic properties of carbon fiber reinforced polymer concrete for low noise railway slab. Composite Structures, 134, 27-35. https://doi.org/10.1016/j.compstruct.2015.08.082
  10. Rajoria, H., and Jalili, N. (2005), Passive vibration damping enhancement using carbon nanotube-epoxy reinforced composites. Composites Science and Technology, 65(14), 2079-2093. https://doi.org/10.1016/j.compscitech.2005.05.015
  11. Park, J. (2005), Transfer function methods to measure dynamic mechanical properties of complex structures. Journal of Sound and Vibration, 288(1-2), 57-79. https://doi.org/10.1016/j.jsv.2004.12.019
  12. Roh, S. K., Kim, E., Oh, J. S., and Cho, J. U. (2019), An Analysis on the Effect of Application on Vibration Isolation Liner of Elevator Guide Rail Bracket. Journal of the Korea Convergence Society, 10(8), 145-151. https://doi.org/10.15207/JKCS.2019.10.8.145