Journal of Korean Association for Spatial Structures (한국공간구조학회논문집)

Korean Association for Spatial Structures (한국공간구조학회)
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Shear Behaviour of Precast Concrete Modular Beam Using Connecting Plate

연결 플레이트를 사용한 프리캐스트 콘크리트 모듈러 보의 전단성능

  • Received : 2021.10.13
  • Accepted : 2021.11.08
  • Published : 2021.12.15
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Abstract

The Precast concrete(PC) modular structures are a method of assembling pre-fabricated unit modules in the construction site. The essential aim of modular structures is to introduce a connection method that can ensure splicing performance and effectively resist shear strength. This study proposed PC module using a connecting plate that can replace splice sleeves and shear keys used in the conventional PC modular structures. To evaluate the splicing performance and shear capacity of the proposed method, the shear test was conducted by fabricating one monolithic reinforced concrete(RC) beam and two PC modular beams with a shear span-to-depth ratio as variables. The experimental results showed that the shear capacity of the PC modular beam was about 89% compared to that of the RC beam, and showed a failure of the RC beam according to the shear span-to-depth ratio. Therefore, it was considered that the connecting plate effectively transferred the stress between each PC module through the joint and ensure integrity. In addition, the applicability of shear strength equation of ACI 318-19 and Zsutty's equation to PC modular beams were evaluated. Results demonstrated that the improved shear strength equations are needed to consider reduction of shear strength in PC modules.

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Acknowledgement

본 연구는 교과부 한국연구재단의 지원에 의해 수행된 2021년도 기초연구실사업 (NRF-2019R1A4A1028116) 결과의 일부입니다.

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