Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Multi-support excitation shaking table test of a base-isolated steel cable-stayed bridge

지진격리 강재 케이블 교량의 다지점 진동대 실험

  • Kim, Seong-Do (School of Civil, Urban, and Environmental Engineering, Kyungsung University) ;
  • Ahn, Jin-Hee (Department of Civil Engineering, Gyeongnam National University of Science and Technology) ;
  • Kong, Young-Ee (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Choi, Hyoung-Suk (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Cheung, Jin-Hwan (Department of Civil and Environmental Engineering, Pusan National University)
  • 김성도 (경성대학교 토목공학과) ;
  • 안진희 (경남과학기술대학교, 토목공학과) ;
  • 공영이 (부산대학교, 사회환경시스템공학과) ;
  • 최형석 (부산대학교, 사회환경시스템공학과) ;
  • 정진환 (부산대학교, 사회환경시스템공학과)
  • Received : 2015.03.09
  • Accepted : 2015.05.21
  • Published : 2015.07.01
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Abstract

A series of tests was conducted for full-scale single-pylon asymmetric cable-stayed bridges using a system of multiple shaking tables. The 2-span bridge length was 28 m, and the pylon height was 10.2 m. 4 different base conditions were considered: the fixed condition, RB (rubber bearings), LRB (lead rubber bearings), and HDRB (high damping rubber bearings). Based on investigation of the seismic response, the accelerations and displacements in the axial direction of the isolated bridge were increased compared to non-isolated case. However, the strain of the pylon was decreased, because the major mode of the structure was changed to translation for the axial direction due to the dynamic mass. The response of the cable bridge could differ from the desired response according to the locations and characteristics of the seismic isolator. Therefore, caution is required in the design and prediction in regard to the location and behavior of the seismic isolator.

Keywords

References

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