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Title |
Evaluation of Compressive Performance of Precast Concrete Seismic Hollow Columns Filled with Cast-in-Place Concrete and Reinforced 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.2024.36.6.553 |
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Keywords |
중공기둥; 프리캐스트; 보조 띠철근; 압축거동; 구속 hollow column; precast; supplementary ties; compressive response; confinement |
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Abstract |
This study presents an original technique for in-situ cast concrete?filled precast hollow columns, incorporating supplementary ties that pass through the hollow core. As a fundamental experiment on the compressive behavior of hollow columns using the proposed technique, we evaluated the axial load?-strain relationship, the stress-strain behavior of confined concrete, the strength gain factor, and the compression ductility ratio. These results were compared with the corresponding responses compiled from previous extensive tests on conventional columns. The proposed hollow columns showed a strength gain factor and compression ductility ratio comparable to those of conventional columns with the same tie reinforcement index. The use of L-shaped steel and thin plates with burring holes, installed to form the hollow core, had an insignificant effect on the overall compressive performance of the columns and the stress?strain behavior of the confined concrete. Consequently, the proposed technique facilitates the seismic design of precast hollow columns conforming to the requirements of code provisions.
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