Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

Time-Dependent Behavior Analysis of Pre-Tensioned Members Using High-Performance Concrete(HPC)

고성능 콘크리트(HPC)를 사용한 프리텐션 부재의 시간의존거동 해석

  • Nam, Yoo-Seok (Research Institute for Disaster Prevention, KyungPook National University) ;
  • Cho, Chang-Geun (School of Architecture and Civil Engineering, KyungPook National University) ;
  • Park, Moon-Ho (School of Architecture and Civil Engineering, KyungPook National University)
  • 남유석 (경북대학교 방재연구소) ;
  • 조창근 (경북대학교 건설공학부) ;
  • 박문호 (경북대학교 건설공학부)
  • Published : 2006.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper deals with a research about the time-dependent behavior analysis for pre-tensioned high-performance concrete(HPC) members. By improving AASHTO-LRFD(2004) method for predicting the creep and shrinkage of normal concrete, and the relaxation of prestressing tendon, a time-dependent behavior analysis of high-performance concrete structures has been introduced. Two methods, the step-function method and the time-step method have been incorporated in the time-dependent analysis. The developed program can predict the initial and time-dependent losses of prestressing forces and the deflections of high-performance concrete structures. The present model has been verified by comparing with the experimental results from the test of time-dependent behaviors of pre-tensioned members using high-performance concrete. From this, the current model gives good relations with the experimental results, but the AASHTO method is not good for the prediction of time-dependent behaviors of high-performance concrete members.

본 연구는 고성능 콘크리트를 사용한 프리텐션 콘크리트 부재에 대한 시간의존거동해석에 관한 연구이다. 일반 콘크리트의 크리프, 건조수축 및 강재의 릴렉세이션 현상에 대한 기존의 AASHTO 방법을 수정하여, 고성능 콘크리트 부재에 대한 단계-함수법 및 시간-단계법에 의한 시간의존 해석기법을 소개하였다. 제시된 모델은 고성능 콘크리트 프리텐션 부재의 프리스트레스 손실 및 처짐에 대한 초기 및 시간의존거동 예측 값을 제공해 준다. 제안된 모델을 이용하여, 고성능 콘크리트를 사용한 프리텐션 부재의 시간의존거동에 관한 실험 결과와 비교하였다. 기존의 AASHTO 규정에 의한 시간의존 거동 예측치에 비해, 소개된 모델에 의한 고성능 콘크리트 부재의 초기 및 시간의존거동 예측결과가 실제 거동에 보다 정확한 결과를 제공해 주었다.

Keywords

References

  1. 윤영수, '고성능 콘크리트의 재료, 구조 설계 및 시공의 체계적 실용화 기술 개발,' 대한토목학회지, Vol.52, No.10, 2004년 10월. pp.39-46
  2. 김세훈, 오병환, '크리프 회복 거동을 고려한 철근콘크 리트 및 프리스트레스트 콘크리트 부재의 장기거동해석에 관한 연구,' 콘크리트학회 논문집, Vol.10, No.1, 1999, pp.279-288
  3. 조창근, 박문호, 남유석, 'PSC 세그먼트 박스거더형 사 장교의 시간의존해석모델,' 대한토목학회 논문집, Vol.25, No.3A, 2005, pp.471-478
  4. Huo, X., and Tadros, M. K., Time-Dependent Effects in Pre-stressed Concrete Composite Bridge Members, High Strength Concrete, First International Conference, edited by Azizinamini, A., Darwin, D., and French, C., ASCE, 1997, pp.308-320
  5. Mokhtarzadeh, A., and French, C. E., Mechanical Properties of High-Strength Concrete, Research Report 1988-11, Center of Transportation Research, The University of Minnesota, 1998, 595pp
  6. US Department of Transportation, Federal Highway Administration(FHWA) High Performance Concrete Structural Designer's Guide, First Edition, March, 2005, 120pp
  7. AASHTO, AASHTO LRFD Bridge Design Specifications, Third Edition, AASHTO, Washington D.C, 2004
  8. Dilger, W. H., Creep Analysis of Prestressed Concrete Structures Using Creep-Transformed Section Properties, PCl Journal, Vol.27, No.1, January-February, 1982, pp.98-117 https://doi.org/10.15554/pcij.01011982.98.119
  9. Molinas-Vega, J. P. I.,Time-Step Analysis of Prestressed Concrete Beams: Prestress Losses, Camber, and Deflection, MS Thesis, Department of Civil and Environmental Engineering, University of Iowa, 1988. 137pp
  10. Lai, J., Kahn, L., Travis, D., Champeny, M., Prada, J., Shams, M., and Saber, A., Mix Design and Properties of High-Performance Concrete, Final Report to Georgia DOT, Project No.9510, March 1999
  11. ACI Committee 363, State-of-the-Art-Report on High-Strength Concrete, ACI Manual of Concrete Practice(ACI 363R 92), American Concrete Institute, 1992. 49pp
  12. Shams, M., Time-Dependent Behavior of High-Performance Concrete, Ph. D. Dissertation, Georgia Institute of Technology, May 2000. 584pp
  13. Bazant, Z. P., 'Prediction of Creep Effects using Age-Adjusted Effective Modulus Method,' ACI Journal, Vol.69, 1972, pp.212-217
  14. PCI, PCI Design Handbook, Fifth Edition, Precast and Prestressed Concrete Institute, 1999. Chap. 8
  15. Tadros, M. K. and Ghali, A., Deflection of Cracked Prestressed Concrete Members, ACI Special Publication SP86, Deflection of Concrete Structures, American Concrete Institute, Detroit, Michigan, 1986, pp.137-166
  16. Ghali, A., and Trevino, J.,'Relaxation of Steel in Prestressed Concrete,' PCI Journal, Vol.30, No.5, Sept. Oct., 1985, pp.82-94
  17. Nilson, A. H., Design of Prestressed Concrete, 2nd Edition, John Wiley and Sons, New York, 1987, 592pp

Cited by

  1. A Study on Buckling Analysis of Portable Prestressing Device for Pretensioning PSC girders vol.13, pp.1, 2012, https://doi.org/10.5762/KAIS.2012.13.1.419