• Title/Summary/Keyword: $135^{\circ}$ Standard hook

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Development Process and Field Application Performance Analysis for Rebar Reinforcing Clips (RCC Device) to Improve Workability of 135 Degree Standard Hook (135°표준갈고리 작업성 향상을 위한 철근보강클립 (RCC장치) 개발과정 및 현장적용 성과분석)

  • Kim, Yongjoo;Kim, Eunyoung;Song, Hwajun;Park, Kyoungyeun
    • Korean Journal of Construction Engineering and Management
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    • v.22 no.6
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    • pp.138-146
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    • 2021
  • 135 Degree standard hook workability crossed in the Reinforced Concrete (RC) Structure is improved and it reinforces in one side 90° hook binding. As a result, we proposed a One-touch Rebar Reinforcing Clip(RCC Device) that demonstrates the same performance as the 135° standard hook. It was developed through the evaluation of construction and economic analysis. As a result of analyzing 13 sites applied from June 2020, As expected, most of the cases were applied to the structural supervision or the point of the construction supervisor as an irresistible measure. therefore, Through field performance analysis, Various methods such as the method that the original contractor first purchases and then provides after contract with the partner company were proposed for the use of efficient and voluntary reinforcing clip. As a result, It is expected that the contribution in the field will be very high in terms of quality and process management through active utilization.

Seismic Behavior of SRC Columns with Alternative Hoops by Steel Clip-Type Devices to Improve Constructability of Closed Hoops (폐쇄형 후프의 시공성을 개선하기 위해 강재 클립형 연결장치로 보강한 대체후프를 갖는 SRC기둥의 내진거동 )

  • Kim, Young-joo;Choi, Byong-Jeong
    • Journal of Korean Association for Spatial Structures
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    • v.22 no.4
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    • pp.59-70
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    • 2022
  • In SRC column, the closed hoops are applied with the same detail of both 135° standard hooks to expect the same performance as hoops of RC columns. This standard detail is actually complicated to construct, thus, two separating rebars are connected in the form of a square shape and welded over the overlapping section. But this is also complicated in construction practice. Therefore, this study describes experimental results regarding cyclic behaviors shown with alternative hoops cramped by the steel clip type-binding device instead of welding and standard specimen. As a result of the experiment, the specimens with alternative hoops of the SRC column showed comparable performance to the specimens with closed hoops. Therefore, it can be evaluated that the alternative hoops applied with the rebar confinement clips in the SRC column can replace the closed hoop.