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Title |
Evaluation on Composite Behavior at Interface between Precast Peripheral Concrete and Cast-in-Place Concrete in Hollow Column Technique with Supplementary Ties
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Authors |
김형근(Hyung-Geun Kim) ; 양근혁(Keun-Hyeok Yang) ; 김용현(Yong-Hyun Kim) ; 김재포(Jae-Po Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.2.143 |
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Keywords |
중공기둥; 보조 띠철근; 버링 홀; 합성거동; 미끄러짐; 전단내력 hollow column; supplementary ties; burring hole; composite behavior; slip; shear capacity |
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Abstract |
This study examined the composite behavior at the interface between precast peripheral concrete and cast-in-placeconcrete in a hollow section, as part of the development of a hollow column technique. The main test parameters included the amountof supplementary ties passing through a hollow core, the presence of burring hole protrusions designed to accommodate the hollowsection, and the configuration of the supplementary ties. Shear transfer and slip were measured using push-out test specimens thatsimulated the developed hollow column sections, incorporating both precast peripheral concrete and cast-in-place concrete. Theshear transfer due to the shear friction mechanism of the supplementary ties and the dowel action of the burring hole protrusions at theinterfacial failure plane was considered for the composite response at the interface. The test results indicated that the burring holeprotrusions played a significant role in controlling slip between the two concrete blocks along the interface. As a result, thesupplementary ties and burring hole protrusions were found to be effective in achieving a fully composite response at the interface,enhancing the integrity of the hollow column technique.
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