Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Progressive Collapse Resisting Capacity of Moment Frames with Viscous Dampers

점성감쇠기가 설치된 모멘트골조의 연쇄붕괴 저항성능

  • 김진구 (성균관대학교 건설환경시스템공학과) ;
  • 이승준 (성균관대학교 초고층.장대교량학과 대학원) ;
  • 최현훈 (삼성물산 기술연구센터)
  • Received : 2010.04.21
  • Accepted : 2010.07.22
  • Published : 2010.10.31
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Abstract

In this paper the progressive collapse resisting capacity of steel moment frames with viscous dampers was evaluated by nonlinear dynamic analysis. The effects of dampers installed in steel beam-column sub-assemblages with varying natural period and yield strength were evaluated after sudden removal of a column. According to the parametric study the vertical displacement general decreased as the damping ratio of the system increased, and the dampers were effective both in elastic and elasto-plastic systems. The nonlinear dynamic analysis results of the 15-story analysis models showed that the decrease in vertical deflection of the structure with 9m span length, which showed larger deflection, was more predominant than that of the structure with 6m span length.

본 논문에서는 비선형 동적해석방법을 이용하여 점성감쇠기가 설치된 철골조 건물의 연쇄붕괴 저항성능을 평가하였다. 감쇠기가 설치된 2경간 보-기둥 부분골조를 이용하여 주기 및 항복강도의 변화에 따른 감쇠력의 효과를 검토하였다. 해석 결과에 따르면 감쇠비가 증가할수록 기둥이 제거된 지점의 수직변위가 감소하는 것으로 나타났으며, 탄성시스템 뿐만 아니라 비탄성시스템에서도 효과가 있는 것으로 나타났다. 감쇠기가 설치된 15층 3경간 철골 모멘트골조의 비탄성해석을 통하여 감쇠기의 효과를 검증한 결과, 기둥이 제거될 경우 처짐이 작게 발생하는 6m 경간 모델보다 처짐이 크게 발생하는 9m경간 모델의 경우에 감쇠기의 효과가 더욱 크게 나타났다.

Keywords

References

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