Vibration Control for Tower of Suspension Bridge under Turbulence using TMD

난류하에서의 TMD에 의한 현수교 주탑의 진동제어

  • 김기두 (시설안전기술공단 교량진단본부) ;
  • 황윤국 (한국건설기술연구원) ;
  • 변윤주 ((주)신성엔지니어링 기술연구소) ;
  • 장동일 (한양대학교 지구환경건설공학부)
  • Received : 1997.02.18
  • Published : 1997.06.30

Abstract

Before cables are constructed, tower of suspension bridge is behaved as a cantilever type. Buffeting occured by unsteady loading of the tower due to velocity fluctuation in the oncoming flow has a wind velocity consistent with fundamental frequency of the tower and may give rise to large response by the tower resonance. To reduce the dynamic response by buffeting, the behavior of tower with TMD(Tuned Mass Damper) has studied using finite element method in time domain. The buffeting was obtained by transforming the velocity spectrum in frequency domain to random variable in certain time domain. The most probable maximum displacement which can be occured during the time interval was obtained using peak factor. The optimum location for TMD installation and TMD specification were decided by parametric study. Also, the effect of vibration control about various wind velocity was studied by the TMD which has optimum specification and location.

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