Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Seismic Performance of Steel Fiber Reinforced Concrete and Exterior Beam-column Joints With Headed Bars

확대머리철근이 정착된 강섬유 보강 콘크리트 외부 보-기둥 접합부의 내진성능

  • 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)
  • Received : 2022.08.31
  • Accepted : 2022.10.14
  • Published : 2022.11.30
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Abstract

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.

Keywords

Acknowledgement

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

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