Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Shear Strength of Shear Keys in Vertical Joints of Precast Concrete (PC) Wall Panels

프리캐스트 콘크리트 벽판 수직 접합부에서 전단키의 전단강도

  • Yun, Hyun-Do (Dept. of Architectural Engineering, Chungnam National University) ;
  • Seo, Soo-Yeon (Division of Architecture, Korea National University of Transportation) ;
  • Moon, Jeong-Ho (Dept. of Architectural and Civil Engineering, Hannam University) ;
  • Oh, Young-Hun (Dept. of Medical Space Design & Management, Konyang University) ;
  • Kim, Sun-Woo (Dept. of Construction Engineering Education, Chungnam National University)
  • 윤현도 (충남대 건축공학과) ;
  • 서수연 (한국교통대 건축학부) ;
  • 문정호 (한남대 토목.건축공학부) ;
  • 오영훈 (건양대 의료공간디자인학과) ;
  • 김선우 (충남대 건설공학교육과)
  • Received : 2024.01.17
  • Accepted : 2024.03.28
  • Published : 2024.04.30
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Abstract

Off-site construction (OSC), particularly the precast concrete (PC) construction, has been recognized as a promising construction method to resolve the productivity reduction in the construction industry due to increased material costs, reduced and aging workforce. The connections between PC elements are potentially weak locations that control the distribution of the internal forces and the rigidity of the PC buildings. The objective of the study was to investigate the shear strength characteristics of shear keyed joint concrete in the vertical connections between PC wall panels based on the experimental data of 79 specimens without loop reinforcements collected from the literature. The research results demonstrated that lower bounds for the shear strength of joint concrete in vertical connections for PC walls with shear keys and without loop reinforcement can be considered as ${\sqrt[0.08]{f_{cu}}}MPa$. The shear strength of shear keyed joint concrete increases with increasing ${\sqrt{f_{cu}}}$ and the area ratio of a shear key to joint. The shear strength of shear keyed joint concrete in the vertical connections for PC wall system has not adequately addressed by design equation in AASHTO because there is significant scatter on the predictions. However, experimental data indicated that the shear strength equations for PC wall vertical joints in current Korean codes suggested by Architectural Institute of Korea (AIK) are conservative. It is also shown that the shear strength equation of interface without reinforcement in MC2010 is conservative for the shear strength prediction of PC wall vertical joint with shear keys and without loop bars.

Keywords

Acknowledgement

이 연구는 국토교통부/국토교통과학기술진흥원의 Off-Site Construction 기반 공동주택 생산시스템 혁신기술 개발(과제번호 RS-2020-KA158109) 연구비 지원으로 수행되었습니다.

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