Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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Shear Strength of Hairpin Reinforced Cast-In-Place Anchors by Static and Seismic Qualification Tests

헤어핀 보강 선설치앵커의 정적 및 지진모의실험에 의한 전단 저항강도 평가

  • Kim, Dong Hyun (Dept. of Civil Engineering, Pusan National University) ;
  • Park, Yong Myung (Dept. of Civil Engineering, Pusan National University) ;
  • Kim, Tae Hyung (Dept. of Civil Engineering, Pusan National University) ;
  • Jo, Sung Hoon (Dept. of Civil Engineering, Pusan National University) ;
  • Kang, Choong Hyun (School of Architectural and Civil Engineering, Kyungpook National University)
  • 김동현 (부산대학교, 토목공학과) ;
  • 박용명 (부산대학교, 토목공학과) ;
  • 김태형 (부산대학교, 토목공학과) ;
  • 조성훈 (부산대학교, 토목공학과) ;
  • 강충현 (경북대학교, 건축토목공학부)
  • Received : 2015.04.02
  • Accepted : 2015.06.02
  • Published : 2015.06.27
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Abstract

This study evaluated the static and dynamic shear strength of cast-in-place anchors reinforced with hairpin bars in uncracked and cracked concrete. The anchors 30mm in diameter reinforced with D10 hairpin bar were designed with an edge distance of 150mm and an embedment depth of 240mm. The cracked specimens consisted of the orthogonal and parallel cracks to the direction of shear loads, respectively. The dynamic strength was evaluated using seismic qualification tests based on the ACI 355.2 standard. The shear strength of the hairpin reinforced anchor was hardly correlated to the concrete cracks and the dynamic strength was similar to its static shear strength. Finally, a consideration on the design strength of hairpin reinforced anchors was presented.

본 연구에서는 비균열 및 균열콘크리트에 설치된 헤어핀 보강 선설치앵커의 정적 및 동적 저항강도 평가를 위한 연구를 수행하였다. 이를 위해 앵커 직경 30mm, 연단거리 150mm, 매입깊이 240mm에 D10 헤어핀 철근으로 보강한 시험체를 제작하였으며, 균열시험체는 전단하중에 직각방향과 평행방향 균열을 각각 고려하였다. 동적 강도 평가는 지진모의실험에 의하였으며 가력방법은 ACI 355.2의 기준을 적용하였다. 헤어핀 보강 앵커의 저항강도는 콘크리트 균열과는 상관성이 없었으며 동적 강도는 정적 강도와 동등한 수준을 보였다. 마지막으로 헤어핀 보강 앵커의 설계 강도에 대한 고찰을 제시하였다.

Keywords

References

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