Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Response Control of a Cable-Stayed Bridge Using Passive, Active, Semiactive and Hybrid Systems

수동, 능동, 반능동 및 복합 시스템을 이용한 사장교의 지진응답 제어

  • ;
  • ;
  • Spencer, B. F. (Dept. of Civil and Envir. University of Illinosis at Urbana-Campaign) ;
  • 박규식 (한국과학기술원 건설 및 환경공학과) ;
  • 정형조 (한국과학기술원 건설 및 환경공학과) ;
  • ;
  • 이인원 (한국과학기술원 건설 및 환경공학과)
  • Published : 2003.02.01
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Abstract

This paper preliminarily investigates the effectiveness of various control systems, such as passive, active, semiactive and hybrid control, for seismic protection of cable-stayed bridges by examining the ASCE first generation benchmark problem for a cable-stayed bridge. This benchm.0.00000ark problem considers the cable-stayed bridge that is scheduled for completion in Missouri, USA In 2003. Seismic considerations were strongly considered in the design of this bridge due to location of the bridge and its critical role as a principal crossing of the Mississippi River. Based on detailed drawings of this cable-stayed bridge, a three-dimensional linearized evaluation model has been developed to represent the complex behavior of the bridge. A set of eighteen evaluation criteria has been developed to evaluate the capability of each control system. In this study, four passive control systems, one active control system, two semiactive control systems and three hybrid control systems are considered. Numerical simulation results show that all the control systems are effective in reducing the responses of the benchmark cable-stayed bridge under the historical earthquakes. To get good performance, however, the passive control systems need quite large control forces compared to other control systems. The simulation results also demonstrate that the passive, semiactive and hybrid control systems are robust to the stiffness uncertainty of the structure. Therefore, the semiactive and hybrid control systems are more appropriate in real applications for full-scale civil infrastructures.

본 연구에서는 수동, 능동, 반능동 및 복합 시스템과 같은 다양한 제어시스템의 효율성을 미국토목학회에서 제시한 지진하중을 받는 첫번째 벤치 마크 사장교을 이용해 조사하였다. 이 벤치마크 문제는 2003년 완공 예정으로 미국 Mississippi주에 건설중인 Bill Emerson Memorial교를 대상 구조물로 고려하였다. Bill Emerson Memorial 교는 New Madrid 지진구역에 위치하고 Wississippi 강을 횡단하는 주요 교량이라는 점 때문에 설계 단계에서부터 내진설계가 고려되었다. 사장교의 상세한 설계도면에 기초해 교량의 복잡한 거동을 나타낼 수 있는 3차원 선형모델과 각 제어시스템의 성능을 평가하기 위한 18개의 평가기준이 개발되었다. 본 연구에서는 네 종류의 수동제어 시스템, 한 종류의 능동제어 시스템, 두 종류의 반능동제어 시스템 밑 세 종류의 복합제어 시스템이 고려되었다. 수치해석 결과 모든 제어시스템은 지진하중을 받는 벤치마크 사장교의 응답을 감소시켰다. 그러나, 수동제어 시스템의 경우에는 뛰어난 제어성능을 얻기 위해서 다른 제어시스템에 비해 커다란 제어력을 필요로했다. 강인성에 관한 수지해석 결과에 따르면, 수동, 반능동 및 복합제어 시스템이 구조물 강성의 불확실성에 대해 강인함을 보였다. 따라서, 반능동 및 복합제어 시스템이 토목구조물과 같은 대형구조물의 실제 적용에 보다 적절하다.

Keywords

References

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