Browse > Article

Flexural Behavior of RC Beams Using High-Strength Reinforcement for Ductility Assessment  

Kwon, Soon-Beom (서영기술단 구조1팀)
Yoon, Young-Soo (고려대학교 토목환경공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.2, no.1, 2002 , pp. 119-126 More about this Journal
Abstract
This paper presents the appropriateness for using high strength reinforcement according to the use of high strength concrete. Nine flexural tests were conducted on full-scale beam specimens according to the concrete strength, reinforcement strength and reinforcement ratio as main variable. The structural behavior was analyzed due to the flexural strength, stress-strain curve, deflections at yielding and fracture point, crack appearance and ductility factor. The member with high-strength reinforcements showed large deflection at yielding point and this was analyzed as a main cause to decrease the ductility factor. Structural behavior after yielding point, however, showed similarity to behavior of members with normal strength reinforcements of same stiffness. It was found that in the case of using reinforcements of $5500kgf/cm^2$ strength, the combination with concrete of $800kgf/cm^2$ strength demonstrated the great appropriateness which can increase the flexural capacity without any reduction of maximum reinforcement ratio.
Keywords
high-strength concrete; high strength steel; upper limit of reinforcement ratio; ductility This combination also showed the same ductile behavior with the combination with normal concrete behavior;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. G. MacGregor. 'Ductility of Structural Elements' Handbook of Concrete Engineering, 1st Ed., Van Nostrand Reinhold
2 R. Park and Dai Ruitong, 'Ductility of Reinfirced Concrete Beam Sections', ACI Structural Journal/3-4, 1988, pp.217-225
3 Wang, P.T., Sha, Naaman, AE., 'HighStrength Concrete and It's Effect on the Ultimate Strength of beams', ACI Journal, proceedings Y.39, No.6, June 1943, pp 565582
4 강석화, '고강도 철근이 배근된 고강도 콘크리 트 부재의 휨거동에 관한 실험적 연구' 대한 토목학회논문, 제15권 1호, 1995, pp.107-117
5 신성우,'고강도 콘크리트 부재의 응력블럭에 관한 검토' 콘크리트 학회지 제 2권 2호 1990. pp. 93-99
6 Park, Robert, and Paulay, Thomas, Reinforced Concrete Structure, John Wiley & Sons, New York, 1975, 769 pp,
7 Leslie, K.E., Rajagopalnan, K.S., and Everard, N.J., 'Flexural Behavior of highStrength Concrete Beams', ACI Journal Vol.75, No.8, 1976 pp, 517-521
8 Shin, S.W., Ghosh, S.K. and Moreno, J. 'Flexural Ductility of Ultra-High Strength Concrete Members', ACI Structural Journal, Vol.86, No.4, 1989, pp.394-400
9 ACI Committee 318, Building Code Requirments for Reinforced Concrete, American Concrete Institute, pp.14-9
10 김진근, 박찬규, '주철근비에 따른 고강도 콘크 리트보의 휨 거동', 1994년도 콘크리트학회 춘 계학술강연회, 1994
11 Mattock, Kritz; Ladislav B., Hognestad, Einvind. 'Rectangular Concrete Stress Distribution in Ultimate Strength Design', Journal of the ACI., V32, No.8, pp. 875-928, Feb. 1961
12 신성우, 유석형, 안종문, 이광수, '고강도 철근 콘크리트 보의 휩 설계 및 연성능력' 콘크리 트학회논문집 제 8권 6호, 1996, pp.141-149
13 박승종, 김용부,'콘크리트 압축강도변화에 따른 철근 콘크리트 보의 휩연성 거동에 관한실험적 연구' 콘크리트학회지, 제 11 권 3호,1999, pp.131-140
14 장일영, 이호범, 변근주, '초고강도콘크리트의 재료특성 및 휨 거동에 관한 실험적 연구', 한국콘 크리트학회지, 제 4권 2호, 1992, pp.111-118
15 Mohammad S. AI-Haddad, 'Curvature Ductility of Reinfirced Concrete Beams under Low and High Strain Rates', ACV9-1O, 1995, pp.526-534