Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Modeling and Parametric Studies on Moment-Curvature Relation of a Reinforced Concrete Column Subject In Axial-toad and Bi-Axil Moment

축하중과 이축모멘트를 받는 철근콘크리트 기둥의 모멘트-곡률에 관한 모델링 및 변수고찰

  • Published : 2002.10.01
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Abstract

A analytical model is developed which can simulate a complete inelastic biaxial moment-curvature relations of a reinforced concrete column. The model can simulate sudden drop in moment capacity after peak moment and due to spalling of cover concrete. Parametric studies are performed examine the effects of constituent material properties as well as topological arrangement of reinforcements on moment-curvature relations and P-M interaction curve. It has been analytically observed that ductility of a reinforced concrete column is influenced mostly by magnitude of the axial load and spacings or the volume of lateral reinforcements. Compared to ACI P-M interaction curve, overall increase about 10％ in square root of sum of squares of axial force and moment, and about 20％ in peak load are observed for the columns reinforced according to ACI seismic design code.

철근콘크리트 기둥의 비선형 이축모멘트-곡률 관계를 추적할 수 있는 이론모델을 개발하였다. 개발된 모델은 피복콘크리트 박리나 또는 최대하중 후 나타날 수 있는 기둥의 모멘트 저항능력의 취성적인 감소도 모사할 수 있다. 개발된 모델을 이용 기둥의 구성재료 특성과 철근의 기하학적 배치가 PM 상관도와 모멘트-곡률에 미치는 영향에 대하여 변수영향을 고찰하고 철근콘크리트 기둥의 연성은 축하중의 크기, 횡방향 철근의 간격 또는 체적에 가장 큰 영향을 받음이 이론적으로 고찰된 ACI PM-상관도와 비교하여 ACI 내진설계 기준에 따라 횡방향 철근이 배근된 기둥의 경우, 축하중과 모멘트에 대한 : (square root of sum of squares)값이 약 10% 증가하였으며 최대 축하중은 약 20% 정도 증가하였다.

Keywords

References

  1. Soliman, M. T. M. and Yu, C. W., "The Flexural Stress-Strain Relationship for Concrete Confined in Rectangular Transverse Reinforcement," Magazine of Concrete Research (London), Vol.19, No. 61, Dec., 1967, pp.223-238. https://doi.org/10.1680/macr.1967.19.61.223
  2. Sheikh, S. A. and Uzumeri, S. M. M., "Analytical Model For Concrete Confined in Tied Columns," ASCE, Journal of the Stractural Devision, Vol. 108, No. ST12, December, 1982, pp.2703 - 2722.
  3. Park, M. R, Priestley, M. J. N., and Gill, W. D., "Ductility of Square-Confined Concrete Columns," ASCE, Journal of the Stractural Devision, Vol. 108, No. ST4, April, 1982.
  4. Fafitis A. and Shah, S. P., "Predictions of Ultimate Behavior of Confined Column Subjeced to Large Deformations." ACI Stractural Journal Vol. 82, No 4, 423-433.
  5. Saaticioglu, M, "Strength and Ductility of Confined Concrete," ASCE, Journal of the Stractural Enginering, Vol. 118, No.6, June 1992. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:6(1590)
  6. Mander, J. B., Priestley, M. J. N., and Park, R. "The Theoretical Stress-Strain Model for Confined Concrete," ASCE, Journal of the Stractural Enginering, Vol 114, No. 8, August, 1988. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804)
  7. Razvi, S. and Saatcioglu, M., "Confinement Model for High-strength Concrete," ASCE, Journal of structural Engineering, Vol 125, No. 3, March, 1999. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:3(281)
  8. Sheikh S. A. and S. M. Uzumeri, M. ASCE, "Strength and Ductility of Tied Concrete Column," ASCE, Journal of the Stractural Devision, Vol. 106, No. ST5, May, 1980, pp.1079-1104.
  9. Mohamed, A. H., Abdel-Halim Associate Member, ASCE and Taher M. Abu-Lebdeh, "Analytical Study for Concrete Confined in Tied Columns," ASCE, Journal of Structural Engineering, Vol.115, No. 11, November 1989. https://doi.org/10.1061/(ASCE)0733-9445(1989)115:11(2810)
  10. Moehle, J.P., A. M, "ASCE and Terry Cavanagh, Confinement Effectiveness of Cross Ties in RC," ASCE, Journal of Structural Engineering, Vol. 111, No. 10, October, 1985. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:10(2105)
  11. 주진욱, 정헌수, "중심 압축력을 받는 고강도 철근 콘크리트 기둥의 내력 및 연성에 관한 실험적 연구," 중앙대학교 대학원 건축공학과, 1998.
  12. 이영인,정헌수, "띠철근 배근 형상에 따른 고강도 철근콘크리트 기둥의 내력과 연성에 관한 실험적 연구," 중앙대학교 대학원 건축공학과, 1998.
  13. 정봉호,김덕재,정헌수, "중심축하중을 받는 철근콘트리트 기둥의 띠철근 구속효과에 관한 연구," 중앙대학교 대학원 건축공학과, 1999.
  14. Mander, J. B., Priestley, M. J. N., and Park, R., Observed Stress-Strain Behavior of Confined Concrete, ASCE, Journal of Structural Engineering, Vol. 114, No. 8, August, 1988. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1827)
  15. Cusson, D. and Paultre, P., "High-Strength Concrete Columns Confined by Rectangular Ties," ASCE, Journal of Structural Engineering, Vol. 120, No. 3, March, 1994. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:3(783)
  16. EI-Metwally, S. E. and Chen, W. F., "Load-Deformation Relations for Reinforced Concrete Sections", ACI Structural Journal Vol .86, No.2, Mar.-Apr. 1989.
  17. Yen, J. Y. R, "Direct Analysis of Slender Columns with P-Delta Effects," ASCE, Journal of Structural Engineering, Vol. 119, No. 3, March, 1993. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:3(871)
  18. Lee, C. D., Choi, K. R, and Cha, J. S., "Constitutive Modeling of Confined Concrete under Concentric Loading," KCI Concrete Journal,Vol. 13, No. 1 January 2001.
  19. Sheikh, S. A. and Yeh, C. C., "Tied Concrete Columns Under Axial Load and Flexure," ASCE, Journal of the Structural Division, Vol.116, No. 10, October, 1990. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:10(2780)
  20. Kent, D. C. and Park, R, "Flexural Member with Confined Concrete," ASCE, Journal of the Structural Division, Vol. 97, No. ST7, July, 1971.
  21. Johnson, L. W. and Riess, R. D., "Numerical Analysis."