Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Performance Evaluation of Reinforced Concrete Bridge Piers with Lap Splices

철근의 겹침이음을 고려한 철근콘크리트 교각의 내진성능평가

  • 김태훈 (성균관대학교 건축ㆍ조경 및 토목공학 연구소) ;
  • 박현용 (㈜유신코퍼레이션 구조2부) ;
  • 김병석 (한국건설기술연구원) ;
  • 신현목 (성균관대학교 토목환경공학과)
  • Published : 2003.06.01
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Abstract

Lap splices were located in the plastic hinge region of most bridge piers that were constructed before the adoption of the seismic design provision of Korea Highway Design Specification on 1992. But sudden brittle failure of lap splices may occur under inelastic cyclic loading. The purpose of this study is to analytically predict nonlinear hysteretic behavior and ductility capacity of reinforced concrete bridge piers with lap splices under cyclic loading. For this purpose, a nonlinear analysis program, RCAHEST(Reinforced Concrete Analysis in Higher Evaluation System Technology) is used. Lap spliced bar element is developed to predict behaviors of lap spliced bar. Maximum bar stress and slip of lap spliced bar is also considered, The proposed numerical method for seismic performance evaluation of reinforced concrete bridge piers with lap splices is verified by comparison with reliable experimental results.

1992년 도로교 설계기준의 내진설계규정이 도입되기 이전에 건설된 대부분의 교각은 소성힌지구간에서 주철근의 겹침이음이 이루어졌다. 그러나 비탄성 반복하중하에서 겹침이음부의 갑작스런 취성파괴가 발생할 수 있다. 이 연구는 반복하중을 받는 주철근이 겹침이음된 철근콘크리트 교각의 비선형 이력거동과 연성능력을 해석적으로 파악하는데 그 목적이 있다. 이를 위해서 비선형 해석프로그램인 RCAHEST가 사용되었으며 겹침이음된 철근의 거동을 예측하기 위해서 겹침이음 철근요소를 개발하였다. 또한 겹침이음된 철근의 최대 철근응력과 슬립이 고려되었다. 이 연구에서는 주철근의 겹침이음을 갖는 철근콘트리트 교각의 내진성능평가를 위해 제안한 해석기법을 신뢰성 있는 연구자의 실험결과와 비교하여 그 타당성을 검증하였다.

Keywords

References

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Cited by

  1. Seismic Performance Assessment of Existing Circular Sectional RC Bridge Columns according to Lap-splice Length of Longitudinal Bars vol.18, pp.4, 2014, https://doi.org/10.5000/EESK.2014.18.4.201