Journal of Korean Society of Steel Construction (한국강구조학회 논문집)

Korean Society of Steel Construction (한국강구조학회)
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An Experimental Study on Structural Capacity of Joint Between Composite PHC Wall Pile and Bottom Slab with CT Shear Connector

CT형강 전단연결재가 적용된 합성형 PHC벽체파일-하부슬래브 연결부 성능에 관한 실험적 연구

  • Mha, Ho Seong (Department of Civil Engineering, Hoseo University) ;
  • Won, Jeong Hun (Department of Safety Engineering, Chungbuk National University) ;
  • Lee, Jong Ku (Steel Structure Research Division, RIST)
  • 마호성 (호서대학교, 토목공학과) ;
  • 원정훈 (충북대학교, 안전공학과) ;
  • 이종구 (포항산업과학연구원, 강구조연구소)
  • Received : 2013.05.23
  • Accepted : 2013.09.17
  • Published : 2013.10.27
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Abstract

This paper investigated the structural capacity of the CT shear connectors, which is a kind of the perfobond rib and functions as an anchor transferring the tension force in the joint between a composite PHC wall pile and a bottom slab. The direct pull-out test was performed for various specimens. From failure modes and load-displacement curves, it was found that transverse rebars should be placed to holes in a web to restrict pull-out failure of CT shear connectors. The results of additional tests for specimens with transverse rebars and various support lengths indicated that all specimens were failed by the tension failure of PHC pile before pull-out failure of CT shear connector and concrete pull-out failure. Thus, the CT shear connector could endure the tension force between the PHC wall pile and the bottom slab.

본 연구에서는 합성형 PHC 벽체파일의 CT형강 전단연결재가 벽체파일과 하부 슬래브와의 연결부에서 인장력에 저항하는 앵커의 성능을 갖는지 직접 인발실험을 통해 분석하였다. 다양한 실물 크기 실험체들의 파괴형상과 하중-변위 곡선으로부터 CT형강의 인발파괴를 방지하기 위해서는 CT형강 복부 홀에 관통철근을 배치하여 강도를 증가시켜야 함을 알 수 있다. 관통철근이 설치된 다양한 단면의 실험체들을 대상으로 지지점 거리를 변화시켜 파괴형상과 극한강도를 분석한 결과, CT형강의 인발파괴 전에 벽체파일 자체의 콘크리트 인장파괴가 모든 실험체에서 발생하므로 적용된 CT형강 전단연결재는 벽체파일과 하부 슬래브 연결부의 발생 인장력에 대해 충분히 저항할 수 있다.

Keywords

References

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