대한건축학회논문집 (Journal of the Architectural Institute of Korea)

  • 제38권11호
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  • Pages.307-315
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  • 2022
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  • 2733-6239(pISSN)
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  • 2733-6247(eISSN)
대한건축학회 (Architectural Institute of Korea)
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확대머리철근이 정착된 강섬유 보강 콘크리트 외부 보-기둥 접합부의 내진성능

Seismic Performance of Steel Fiber Reinforced Concrete and Exterior Beam-column Joints With Headed Bars

  • Son, Dong-Hee (Dept. of Architectural Engineering, Hanyang University) ;
  • Jeong, Daun (Dept. of Architectural Engineering, Hanyang University) ;
  • Yoo, Mooyoung (Division of Human-Architectural Engineering, Daejin University) ;
  • Bae, Baek-Il (Dept. of Digital Architecture & Urban Engineering, Hanyang Cyber University) ;
  • Choi, Chang-Sik (Dept. of Architectural Engineering, Hanyang University)
  • 투고 : 2022.08.31
  • 심사 : 2022.10.14
  • 발행 : 2022.11.30
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초록

This study aims to verify the possibility of replacing the transverse reinforcement in the exterior beam-column joint where the developed headed bar with volume fraction of steel fibers, and to evaluate its seismic performance via experiment. Three specimens were fabricated using joint transverse reinforcements and steel fiber as variables and reversed cyclic loading tests were performed. As a result of this experiment, it showed the same failure pattern as the details of the special moment frame specimen when the transverse reinforcements were not placed at the joint due to the incorporation of steel fibers. According to the volume fraction of steel fibers, the effective stiffness of the specimen increased by about 20%, and the maximum strength also increased by 3.5% compared to the specimen with transverse reinforcement. Upon analyzing the contribution to the anchorage of the headed bar, it was found that the contribution due to bond increased when the steel fiber was mixed. As a result of the seismic performance evaluation according to ACI 374, the seismic performance of the beam-column joints was satisfied when the development length of the headed bar was reduced and when sufficient transverse reinforcing bars were provided. In addition, the seismic performance was secured when steel fibers were used instead of transverse reinforcement.

키워드

과제정보

이 논문는 2022년도 정부 (과학기술정보통신부) 연구비 지원에 의한 결과의 일부임.(과제번호 : NRF-2020R1A4A1019074)

참고문헌

  1. ACI 318-19. (2019). Building code requirement or structural concrete and commentary, ACI Committee 318, American Concrete Institute.
  2. ACI 352R-02. (2002). Recommendations for design of beam-column connections in monolithic reinforced concrete structures, ACI-ASCE Committee 352, American Concrete Institute.
  3. ACI 374.1-05. (2005). Acceptance criteria for moment frames based on structural testing and commentary, ACI Committee 374, American Concrete Institute.
  4. ACI 544.1R-96. (2002). State of the art report on fiber reinforced concrete, ACI Committee 544, American Concrete Institute.
  5. Choi, C. S., & Bae, B. I. (2019). Effectiveness of steel fibers as hoops in exterior beam-to-column joints under cyclic loading. ACI Structural Journal, 116(2), 205-219.
  6. Kang, T. H. K., Kim, S., Shin, J. H., & LaFave, J. M. (2019). Seismic Behavior of Exterior Beam-Column Connections with High-Strength Materials and Steel Fibers. ACI Structural Journal, 116(4).
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  8. Lee, J. J, Bae, B. I., & Choi, C. S.(2018). An Experimental Study on the Seismic Performance of Reinforced Concrete Exterior Beam-Column Joint with Steel Fiber Volume Fractions. JOURNAL OF THE ARCHITECTURAL INSTITUTE OF KOREA Structure & Construction, 34(4), 15-23.
  9. Lee, S. H. (2019). An experimental study on the structural performance of headed bars in steel fiber reinforced concrete exterior beam-column joints, Master's thesis, Hanyang university
  10. Park, R. (1989). Evaluation of ductility of structures and structural assemblages from laboratory testing, Bulletin of The New Zealand National Society for Earthquake Engineering, 22(3), 155-166. https://doi.org/10.5459/bnzsee.22.3.155-166
  11. Parra-Montesinos, G. J. (2006). Shear strength of beams with deformed steel fibers, Concrete International, 28(11), 57-66.
  12. Sim, H. J., Chun, S. C., & Choi. S. H. (2016). Anchorage Strength of Headed Bars in Steel Fiber-Reinforced UHPC of 120 and 180 MPa. Journal of the Korea Concrete Institute, 28(3), 365-373. https://doi.org/10.4334/JKCI.2016.28.3.365
  13. Thompson, M. K., Jirsa, J. O., & Breen, J. E. (2006). Behavior and capacity of headed reinforcement. ACI Materials Journal, 103(4), 522-530.