Vibration Control of Stay Cable Using Smart Passive Damping System

스마트 수동 감쇠 시스템을 이용한 사장 케이블의 진동 제어

  • 정형조 (세종대학교 토목환경공학과) ;
  • 조상원 ;
  • 장지은 (한국과학기술원 건설 및 환경공학과) ;
  • 이인원 (한국과학기술원 건설 및 환경공학과)
  • Published : 2005.04.01

Abstract

Stay cables, such as are used in cable-stayed bridges, are prone to vibration due to their low inherent damping characteristics. Several methods have been proposed and implemented to mitigate this problem, though each has its limitations. Recently some studies have shown that active and semiactive control system using MR (Magnetorheological) damper can potentially achieve both higher performance levels than passive control system and adaptability with few of the detractions. However, a control system including a power supply, controller, and sensors is required to maximize the performance of the MR damper and this complicated control system is not effective to most of large civil structures. This paper proposes a smart passive damping system using MR dampers by introducing electromagnetic induction (EMI) system as an external power source to MR damper and verified the performance of smart passive damping system for mitigating the vibration of stay cables. The performances of smart passive damping system are compared with those of linear viscous damper and passive-mode MR damper.

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