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.

1. Introduction
 2. Seismic test conditions
  2.1 Multiple-support shaking table system
  2.2 Cable-stayed bridge model
  2.2 Cable-stayed bridge model
  2.3 Seismic test program
  2.4 Instrumentation of a test cable-stayed bridge
 3. Seismic test results
  3.1 Multiple shaking table responses
  3.2 Natural frequency of the cable-stayed bridge
  3.3 Dynamic responses of the bridge
 4. Conclusions
 / ACKNOWLEDGMENT /
 / REFERENCES /

• 김성도(경성대학교 토목공학과) | Kim Seong-Do
• 안진희(경남과학기술대학교 토목공학과) | Ahn Jin-Hee
• 공영이(부산대학교, 사회환경시스템공학과) | Kong Young-Ee
• 최형석(부산대학교, 사회환경시스템공학과) | Choi Hyoung-Suk
• 정진환(부산대학교, 사회환경시스템공학과) | Cheung Jin-Hwan Corresponding author