Shear Capacity Curve Model for Circular RC Bridge Columns under Seismic Loads

지진하중을 받는 철근콘크리트 원형교각의 전단성능곡선 모델

  • 이재훈 (영남대학교 건설환경공학부) ;
  • 고성현 (영남대학교 대학원 토목공학과) ;
  • 정영수 (중앙대학교 토목공학과)
  • Published : 2006.04.30


Reinforced concrete bridge columns with relatively small aspect ratio show flexure-shear behavior, which is flexural behavior at initial and medium displacement stages and shear failure at final stage. Since the columns with flexure-shear failure have lower ductility than those with flexural failure, shear capacity curve models shall be applied as well as flexural capacity curve in order to determine ultimate displacement for seismic design or performance evaluation. In this paper, a modified shear capacity curve model is proposed and compared with the other models such as the CALTRANS model, Aschheim et al.'s model, and Priestley et al.'s model. Four shear capacity curve models are applied to the 4 full scale circular bridge column test results and the accuracy of each model is discussed. It may not be fully adequate to drive a final decision from the application to the limited number of test results, however the proposed model provides the better prediction of failure mode and ultimate displacement than the other models for the selected column test results.


seismic design;performance evaluation;flexure-shear failure;shear capacity curve model;failure mode;ultimate displacement


  1. 한국도로교통협회, 도로교설계기준. 2004
  2. AASHTO, Standard Specifications for Highway Bridges, American Association of State Highway and Transportation Officials, 17th ed., Washington, D.C., USA., 2002
  3. AASHTO, LRFD Bridge Design Specifications, American Association of State Highway and Transportation Officials, 2nd ed., Washington, D.C, USA, 2002
  4. CALTRANS, Caltrans Seismic Design Criteria, Version 1.3, California Department of Transportation, Sacramento, USA, December, 2002
  5. Aschheim, M. and Moehle, J. P., 'Shear Strength and Deformability of RC Bridge Columns Subjected to Inelastic Cyclic Displacement,' Report No. UCB /EERC 92/04, Earthquake Engineering Research Center, University of California at Berkeley, Mrrch, 1992
  6. Priestley, M. J. N., Seible, F., and Calvi, G. M., Seismic Design and Retrofit of Bridges, John Wiley & Sons, Inc., New York, 1996, 686pp
  7. 김재관, '기준교량의 내진보강 방안 연구', 시설안전기술공단, 한국지진공학회, 1999, 300pp
  8. Mander, J. B., Waheed, S. M., Chaudhary, M. T. A., and Chen, S. S., 'Seismic performance of shear critical reinforced concrete bridge piers,' Technical Report NCEER 93-0010, National Center for Earthquake Engineering Research, Buffalo, 1993
  9. 정영수, 이재훈, 김재관, '한국도로공사 고속도로 기존 교량의 유형별 내진성능 평가를 위한 실험적 연구', 한국 도로공사 연구보고서, 2001, 397pp
  10. 김병석, 김영진, 곽임종, 조창백, 조정래, '휨-전단 복합거동을 보이는 RC 원형교각의 내진성능 평가', 한국지진공학회 논문집, 한국지진공학회, Vol.5, No.3, 2001, pp.29-36
  11. 이재훈, 김민구, 손혁수, 'Flexure-Shear Performance of Circular RC Bridge Columns under Cyclic Loading,' KEERC Annual Report, 2001, pp.101-114
  12. 이재훈, 고성현, 이대형, 정영수, '반복 횡하중을 받는 원형교각의 휨-전단 거동', 한국콘크리트학회논문집, 제 16권 6호, 2004, pp.823-832
  13. 한국도로공사 구조물처, '고속도로 내진설계 미반영 교량의 내진보강설계 지침', 2004, 38pp