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횡보강근 배근형상에 따른 RC 기둥의 연성에 관한 실험적 연구

Experimental Study on Ductility of RC Columns According to Configuration of Transverse Reinforcement

  • 투고 : 2012.03.28
  • 심사 : 2012.08.03
  • 발행 : 2012.11.30

초록

이 연구에서는 횡보강근의 배근형상에 따른 철근콘크리트 기둥의 휨 연성을 평가하였다. 이를 위하여 총 8체의 철근콘크리트 기둥 실험체를 휨 실험하였다. 실험변수는 횡보강근의 배근형상과 항복강도 및 횡보강근량으로 하였다. 실험체는 $250{\times}250mm$ 단면을 가지도록 계획하였으며, 휨 파괴를 유도하기 위하여 전단경간비를 4.1로 계획하였다. 이 실험에서는 일정한 축하중과 함께 반복 횡하중을 실험체에 가력하였다. 실험결과, 제안된 횡보강근 배근형상을 가지는 실험체가 기존 띠철근을 가지는 실험체보다 더 높은 연성과 에너지 소산 능력을 나타냄을 확인할 수 있었다.

This paper estimates the ductility of reinforced concrete columns according to configurations of transverse reinforcement. A total of 8 reinforced concrete columns were cast and tested in flexure. The test variables in this study were the configurations, yield strength, and amount of transverse reinforcement. The specimens had a cross-section of $250{\times}250mm$ and had a shear span-to-depth ratio of 4.1 to induce flexural failure. In the test, cyclic lateral load was applied to the specimens with a constant axial load. The experimental result indicated that the specimens with proposed configurations of transverse reinforcement showed higher ductility and energy dissipation capacity than the specimens with rectangular tie.

키워드

참고문헌

  1. Jong-Kuen kim, Byum-Seok Han and Sung-Woo Shin, "Ductility Capacity of Ultra-High Strength R/C Tied Columns Considering the Axial Load Ratio and Configuration of Transverse Reinforcement", Journal of the Architectural Institute of Korea Structure & Construction, vol. 25, No. 1, 2009. pp.3-11.
  2. Koji Sakai and Sharmin A. Sheikh, "What Do We Know about Confinement in Reinforced Concrete Columns?" ACI Structural Journal, vol. 86, No. 2, 1989, pp.192-207.
  3. Korea Concrete Institute, "Concrete Design Code", Korea Concrete Institute, 2007, p.327.
  4. Samuel Yen-Liang Yin, Tzu-Liang Wu, Tony C. Liu, Shamim A. Sheikh and Raymond Wang, "Interlocking Spiral Confinement for Rectangular Columns", Concrete International, American Concrete Institute, vol. 33, No. 12, 2011, pp.38-45.
  5. Sharmin A. Sheikh and Shafik S. Khoury, "A Performance- Based Approach for the Design of Confining Steel in Tied Columns", ACI Structural Journal, vol. 94, No. 4, 1997, pp.421-431.
  6. Tae-Sung Eom and Hong-Gun Park, "Equations for Estimation Energy Dissipation Capacity of Flexure- Dominated RS Members", Journal of the Korea Concrete Institute, vol. 14, No. 6, 2002, pp.989-1000. https://doi.org/10.4334/JKCI.2002.14.6.989

피인용 문헌

  1. Experimental Study of Strength and Ductility on Masonry Wall Frame and Shear Wall Frame Subjected to Cyclic Lateral Loading vol.13, pp.2, 2013, https://doi.org/10.9712/KASS.2013.13.2.083