In this study, a field bridge test was conducted to find the dynamic properties of cable supported bridges with resilient-friction base isolation systems (R-FBI). Various ambient vibration tests were performed to estimate dynamic properties of a test bridge using trucks in a non-transportation state before opening of the bridge and by ordinary traffic loadings about one year later after opening of the bridge. The dynamic properties found from the results of the tests were compared with an analysis model. From the result of the ambient vibration tests of the cable supported bridge with R-FBI, it was confirmed that the dynamic properties were sensitive to the stiffness of the R-FBI in the bridge, and the seismic analysis model of the test bridge using the effective stiffness of the R-FBI was insufficient for reflecting the dynamic behavior of the bridge. In the case of cable supported bridges, the seismic design must follow the “Korean Highway Bridge Design Code (Limit State Design) for Cable supported bridges.” Therefore, in order to reflect the actual behavior characteristics of the R-FBI installed on cable-supported bridges, an improved seismic design procedure should be proposed.

A B S T R A C T
1. 서 론
2. 실험 대상 케이블교량 및 지진격리장치 배치 현황
3. 개통 전‧ 후 현장 재하 실험
    3.1 교량 개통 전 1차 강제 자유진동실험
    3.2 교량 개통 후 2차 상시 자유진동실험
4. 실험 결과 및 분석
    4.1 대상 교량 개통 전‧후 실혐 결과 비교
    4.2 해석 결과 비교
5. 결 론
REFERENCES

• 길흥배(한국도로공사 초장대교량연구단 연구위원) | Gil Heungbae (Research Fellow, Super Long Span Bridge R&D Center, Korea Expressway Corporation)
• 박선규(성균관대학교 건설환경시스템공학과) | Park Sun Kyu (Department of Civil Engineering, Sungkyunkwan University)
• 한경봉(한국도로공사 초장대교량연구단 수석연구원) | Han Kyoung Bong (Super Long Span Bridge R&D Center, Korea Expressway Corporation)
• 윤완석(한국도로공사 스마트건설사업단) | Yoon Wan Seok (Center for Smart Construction Technology, Korea Expressway Corporation) Corresponding author