Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Repair of Damaged RC columns with Steel and CFRP Jackets

강판피복과 CFRP를 이용한 손상된 교각의 내진보수

  • Published : 2005.06.01
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Abstract

In this paper, the comparative performance of repaired RC columns using steel and CFRP is presented. Also, the effect of transverse reinforcement ratio on the behavior of the steel and the CFRP repairing is investigated. Monotonic and cyclic load tests are conducted on nine RC column specimens with different repairing strategies and transverse reinforcement ratios to compare the load-displacement curves and the hysteretic behaviors. From the tests, it is observed that both steel and CFRP jacket repairings can significantly increase the displacement ductility and the ultimate load capacity of damaged columns.

본 논문에서는 RC 교가의 보수${\cdot}$보강 시 사용되는 강판피복과 CFRP의 내진 보수성능을 비교하고, 횡방향 철근비가 강판과 CFRP로 보수된 실험체의 성능에 미치는 영향을 분석하였다. 이를 위하여 다른 횡철근비를 갖는 3개의 교각 실험체를 각 3개씩 총 9개를 제작하여 보수 전과 강판 및 CFRP보수 후의 거동을 비교하였다. 비교에 사용된 거동은 이력거동과 극한거동이며 이러한 거동은 반복하중 및 단조증가하중실험의 수행을 통하여 구하였다. 각 횡철근비 및 보수방법에 대하여 이력거동, 최대하중 및 최대변위를 비교한 결과 강판과 CFRP로 보수된 실험체의 변위연성과 최대하중이 증가하였음을 확인하였다. 또한 횡방향 철근비가 증가함에 따라서 실험체의 변위연성이 증가하였고, 소성힌지의 위치도 높아짐을 알 수 있었다.

Keywords

References

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