콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제16권1호
  • /
  • Pages.111-124
  • /
  • 2004
  • /
  • 1229-5515(pISSN)
  • /
  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
권호 표지
DOI QR코드

DOI QR Code

반복횡하중을 받는 철근콘크리트 원형 교각의 축방향철근 연결상세에 따른 강도저감 및 파괴거동

Strength Degradation and Failure of Circular RC Bridge Columns with Longitudinal Steel Connection under Cyclic Lateral Load

  • 발행 : 2004.02.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

축방향철근의 연결상세에 따라 7개 그룹 총 21개의 원형나선철근 기둥 시험체를 제작하여 준정적 실험을 수행하였다. 축방향철근 연결상세(단일철근, 겹침이음 및 기계적연결), 심부구속철근비, 축력비 등을 주요 실험변수로 채택하였으며 실험결과 축방향철근 연결상세에 따라 다른 파괴거동을 나타내었고, 내진성능에서도 차이를 나타내었다. 축방향철근이 겹침이음된 시험체의 실험결과, 모든 축방향철근이 겹침이음된 시험체는 내진성능이 상당히 저하되는 것으로 나타났으나, 축방향철근의 $50\%$가 겹침이음된 시험체의 경우 제한적이지만 한정적인 연성능력을 나타내었다. 또한, 축방향철근을 커플러를 사용하여 기계적으로 연결한 시험체는 축방향철근이 단일철근으로 구성된 시험체와 유사한 파괴거동 및 강도저감거동을 나타내었다.

This research is a part of a research program to verify the seismic performance of circular reinforced concrete bridge columns with respect to longitudinal steel connection details under cyclic lateral load. A total of 21 column specimens were constructed and tested. Main variables in this test program were longitudinal steel connection details(continuous, lap-spliced, and mechanically connected), confinement steel ratio, and axial force ratio, etc. The test results of the columns with different longitudinal steel connection details showed different failure mode, strength degradation, and seismic performance. From the quasi-static test, it was found that the columns with all longitudinal reinforcement lap-spliced showed significantly reduced ductility. However, seismic performance of the columns with half of longitudinal reinforcement lap-spliced showed limited ductility but much more ductile behaviour than the columns with all longitudinal reinforcement lap-spliced. It was also found that the seismic performance, failure mode and strength degradation of columns with mechanical connected longitudinal reinforcement were similar to those of columns with continuous longitudinal reinforcement.

키워드

참고문헌

  1. 한국도로교통협회, '도로교설계기준', 한국도로교통협회, 2000, 474pp
  2. 한국콘크리트학회, '콘크리트구조설계기준', 한국콘크리트학회, 1999, 319pp 2003, 295pp
  3. AASHTO, 'Standard Specifications for Highway Bridges,' American Association of State Highway and Transportation Officials, 16-th edition, Washington, D.C., USA, 1995, p.C-8
  4. CALTRANS, 'Bridge Design Specifications,' California Department of Transportation, Sacramento, USA, July, 2000, p.D-1
  5. New Zealand Standard, 'Concrete Structures Standard-Part 1 : Design of Concrete Structures,' NZS 3101, 1995, 256pp
  6. New Zealand Standard, 'Concrete Structures Standard-Part 2 : Comnentary on the Design of Concrete Structures,' NZS 3101, Standards Council, New Zealand, 1995, 264pp
  7. Omar A. Jaradat, David I. McLean, and M Lee Marsh, 'Performance of Existing Bridge Columns under Cyclic Loading-Part 1 : Experimental Results and Observed Behavior,' ACI Structural Journal, Vol.95, No.6, 1998, pp.695-704
  8. Riyad S. Aboutaha, Michael D. Engelhardt, James O. Jirsa, and Michael E. Kreger, 'Experimental Investigation of Seismic Repair of Lap Splice Failures in Damaged Concrete Columns,' ACI Structural Journal, Vol.96, No.2, 1999, pp.297-303
  9. Yuk Hon Chai, M. J. Nigel Priestley, and Frieder Seible, 'Seismic Retrofit of Circular Bridge Columns for enhanced Flexural Performance,' ACI Structural Journal, Vol.88, No.5, 1991, pp.572-584
  10. 이재훈, 배성용, 이형준, '나선철근교각의 내진성능실험', 대한토목학회 논문집, 대한토목학회, 제21권 1-A호, 2001, pp.109-121
  11. 정영수, 박창규, 이은희, '지진을 경험한 형상비 2.5RC 교각의 내진 변위 연성도 평가', 한국지진공학회논문집, 한국지진공학회, Vol.7, No.3, 2003, pp.79-88
  12. Jae-Hoon Lee, Sang-Geun Seok, and Hyeok-Soo Son, 'Seismic Performance and Reinforcement Details of Circular Bridge Columns,' 7th NCEE Conference, Earthquake Engineering Research Institute, Boston, USA, 21-25 July, Summary, 2002, Paper, pp.513, Full Paper in CD-ROM Paper No.871
  13. Young-Soo Chung and Jae-Hyung Lee, 'Seismic Performance and Retrofit of Circular Bridge Piers with Spliced Longitudinal Steel,' KCI Concrete Journal, Vol.14, No.3, 2002, pp.130-137
  14. Jae-Hoon Lee, Hyeok-Soo Son, and Sang-Yeup Han, 'Reinforcement Details and Design Strength of Bridge Columns in Moderate Seismicity Region,' KEERC Annual Report, 2002, pp.122-134
  15. ACI Committee 318-99, 'Building Code Requirements for Reinforced Concrete and Commentary,' ACI 318-99, ACI 318R-99, American Concrete Institute, Detroit, 1999, 391pp
  16. Priestley, M. J. N., Seible, F., and Calvi, G. M, 'Seismic Design and Retrofit of Bridges,' John Wiley & Sons, Inc., New York, 1996, 686pp