Acceleration of the Perception Threshold of Occupants for the Horizontal Vibration of Tall Buildings

고층 건축물의 수평진동에 대한 사용자의 지각임계가속도

  • Published : 2007.06.30

Abstract

In this paper, acceleration threshold of perception for the horizontal vibration of tall buildings was estimated. Excessive vibration of tall buildings by wind can give displeasure, such as giddiness and visual insecurity. To provide comfortable environment to residents of tall buildings, acceleration needs to be limited. For tall buildings the first mode of vibration is dominant. To reproduce the first mode of vibration, experiments were performed by generating sine waves by a shaking table. A nitration house was made and forty persons were employed for experiments. The forty persons were organized into five experimental groups, each of which was composed of eight persons, and the threshold of perception for horizontal vibration was measured by increasing acceleration in the range of 0.2Hz through 1.2Hz of frequency, Performance curves were obtained by dividing the distribution of perception for horizontal vibration into the range of $0{\sim}20%,\;21{\sim}40%,\;41{\sim}60%,\;61{\sim}80%\;and\;81{\sim}100%$ and by fitting curves.

본 논문에서는 진동대를 이용하여 고층 건축물의 수평진동에 대한 지각임계가속도를 측정하였다. 바람에 의한 초고층 건축물의 과도한 진동은 거주자들에게 시각차와 현기증 같은 불쾌감을 줄 수 있다. 초고층 건축물 거주자들에게 쾌적한 환경을 제공하기 위해서는 가속도를 제한할 필요가 있다. 초고층 건축물은 1차 고유주기에 지배적이다 본 연구진은 1차 고유주기를 재연하기 위해 진동대를 사용하여 사인파진동에서 실험을 수행하였다. 실험은 진동하우스를 제작하고, 건장한 40명의 피험자를 대상으로 실시하였다 40명의 피험자를 8명씩 5개조로 나누고, 특정주파수범위$(0.2Hz{\sim}1.2Hz)$에서 가속도를 증가시키면서 수평진동에 대한 인지도를 측정하였다. 수평진동실험으로 피험자들의 진동에 대한 인지도를 누적분포표로 만들고, $0{\sim}20%,\;21{\sim}40%,\;41{\sim}60%,\;61{\sim}80%,\;81{\sim}100%$의 누적분포에 대해 추세선을 그려서 성능평가곡선을 작성하였다.

Keywords

References

  1. 김동우, 하영철, 김종락(2006) 수평진동에 대한 고층건축물의 사용성 평가방법. 2006년도 한국풍공학회 학술발표회 논문집, 9. pp.49-56
  2. 조강표, 홍성일(2006) 초고층 건축물의 진동사용성 평가기준의 검토 및 고찰, 한국풍공학회지, 10(1), pp.73-82
  3. Chang, F.K.(1973) Human Response to Motions in Tall Buildings. J. Struct. Div., ASCE, 99(ST6). pp.1259-1272
  4. Chen, P.W., Robertson, L.E.(1972) Human Perception Thresholds of Horizontal Motion. J. Struct. Div., ASCE, 98(ST8), Proc. Paper 9142. pp.1681-1695
  5. Committee 36, Council on Tall Buildings and Urban Habitat(1981) Motion Perception and Tolerance. Chapter PC-13, Monograph on Planning and Design of Tall Buildings. Volume PC: Planning and Environmental Criteria for Tall Buildings
  6. Irwin, A.W.(1978) Human Response to Dynamic Motion of Structures. The Struct. Engr, 56A(9). pp.237-244
  7. ISO 6897-1984(E) Guidelines for the evaluation of the response of occupants of fixed structures. especially buildings and off-shore structures. to low-frequency horizontal motion(0.063 to 1 Hz). International Organization for Standardization. Geneva
  8. Kanda, J., Tamura, Y., Fujii, K., Ohtsuki, T., Shioya, K., Nakata, S. (1994) Probabilistic Evaluation of Human Perception Threshold of Horizontal Vibration of Buildings(0.125 Hz to 6.0 Hz). Presented at the ASCE Structures Congress and the IASS International Symposium. Atlanta
  9. Kwok, K.C.S., Burton, M.D., Hitchcock, P.A. (2005) Human Perception of Tall Building Motions in Strong Wind Environments. The Sixth Asia-Pacific Conference on Wind Engineering (APCWE-IV), Seoul, Korea, September 12-14. pp.248-262
  10. National Research Council of Canada(1995) National Building Code of Canada. User's Guide-NBC 1995 Structural Commentaries(part 4)
  11. Simiu, Emil, Scanlan, Robert H(l986) Wind Effects on Structures(2nd ed.). John Wiley & Sons. New York. pp.192-193
  12. Soliman, J.I.(1963) Criteria for Permissible Levels of Industrial Vibrations with Regard to Their Effect on Human Beings and Buildings. Proc. Symp. Measurement and Evaluation of Dynamic Effects and Vibrations of Constructions, The International Union of Testing and Research Laboratories for Materials and Structures (RILEM). 1. pp.111-147
  13. 日本建築學會(2000) 建築物の減衰
  14. 日本建築學會(2004) 建築物の振動にする居住性能評價指針.同解說