횡방향 구속이 교각의 겹침이음에 미치는 영향에 대한 고찰

Circumferential Confinement Effect on Lap-Spliced Reinforcements of Circular Bridge Pier

  • 최영민 (한양대학교 토목환경공학과 BK21) ;
  • 황윤국 (한국건설기술연구원 구조연구부) ;
  • 권태규 (한국건설기술연구원 구조연구부) ;
  • 박경훈 (한국건설기술연구원 구조연구부)
  • 발행 : 2003.11.01

초록

The bridge columns with lap-splice reinforcements in earthquake suffered a brittle bond-slip failure due to deterioration of the lap-spliced longitudinal reinforcements without developing its flexural capacity or ductility. In this case, such a brittle failure can be controlled by the seismic retrofit using FRP wrapping. The retrofitted columns using FRP wrapping showed significant improvement in seismic performance due to FRP's confinement effect. This paper presents the circumferential confinement effect of existing circular bridge pier strengthened with FRP wrapping for poor lap-splice details. The effects on the confinement of FRP wrapping, such as gap lengths between footing and FRP, fiber orientations, and thicknesses of FRP, were investigated by quasi-static experiments.

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