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Vibration Characteristics Evaluation According to Natural Periods of Structures and Location of a Sky-bridge

구조물의 고유진동주기 및 스카이브릿지 설치위치에 따른 진동특성평가

  • Received : 2013.02.18
  • Accepted : 2013.06.07
  • Published : 2013.06.30

Abstract

Recently, studies of vibration control performance improvement of tall buildings connected by a sky-bridge have been conducted. In this study, the effect of difference of natural vibration periods of two buildings and install location of a sky-bridge on vibration control performance has been investigated. To this end, 40-story and 50-story building structures were selected as example structures. Analytical models were developed by varying the natural period difference ratio from 1.0 to 1.5. Artificial earthquake load based on KBC2009 was used as an excitation for time history analyses. Based on numerical simulation results, it has been shown that control performance for displacement and velocity of tall buildings connected by a sky-bridge is improved as the difference of natural periods of two buildings increases and the linked story becomes higher. However, in the case of acceleration response, it shows a counter trend compared to displacement and velocity responses.

근래에 스카이브릿지를 활용하여 연결된 고층구조물의 진동제어성능을 개선하고자 하는 연구가 수행되고 있다. 본 논문에서는 스카이브릿지로 연결되는 두 구조물의 고유진동주기의 차이와 스카이브릿지 설치위치가 진동제어성능에 미치는 영향에 대해서 분석하여 보았다. 이를 위하여 40층과 50층 구조물을 연결된 예제구조물로 선택하였고 두 구조물의 고유진동주기 차이를 1.0배에서 1.5배까지 순차적으로 변경하면서 해석모델을 구성하였다. 각각의 해석 모델에 대하여 KBC2009를 기반으로 생성한 인공지진하중을 입력 하중으로 생성하여 시간이력해석을 수행하였다. 수치해석결과 두 구조물의 고유진동주기차이가 증가할수록, 연결된 층의 높이가 높아질수록 변위 및 속도응답에 대해서 일반적으로 우수한 제어성능을 나타내는 것을 알 수 있었다. 그러나 가속도응답의 경우에는 이러한 경향과 반대되는 제어성능변화를 나타내었다.

Keywords

References

  1. H.S. Kim, A.R. Yang, D.G. Lee, S.K. An, J.K. Oh "Performance Evaluation of Vibration Control of High-rise Buildings Connected by Sky-Bridge", Journal of the Korean Association for Spacial Structures, Vol. 8, No. 4, pp.91-100, 2008.
  2. H.S. Kim, D.G. Lee, A.R. Yang, H. Ko "Efficient Dynamic Analysis of High-rise Buildings Having Belt Walls Connected by a Sky-Bridge", Journal of the Computational Structural Engineering Institute of Korea, Vol. 22, No. 3, pp. 231-242, 2009.
  3. H.S. Kim, Y.G. Park, H. Ko, E.H. Lee, D.G. Lee "Performance Evaluation of Vibration Control According to Installation Location of a Sky-bridge", Journal of the Korean Association for Spacial Structures, Vol. 10, No. 3, pp.65-74, 2010.
  4. T.T. Soong, G.F. Dargush, Passive Energy Dissipation Systems In Structural Engineering, John Wiley & Sons, 1997.