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Title |
Reversed Cyclic Behavior of Post-Tensioned Precast Concrete Beam-Column Connections with Unbonded Tendons
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Authors |
황진하(Jin-Ha Hwang) ; 최승호(Seung-Ho Choi) ; 김재현(Jae-Hyun Kim) ; 김강수(Kang Su Kim) ; 우운택(Woon-Taek Woo) |
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DOI |
https://doi.org/10.4334/JKCI.2018.30.6.657 |
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Keywords |
보-기둥 접합부 ; 프리캐스트 콘크리트 ; 포스트텐션 ; 비부착긴장재 ; 유한요소해석 beam-column connection ; precast concrete ; post-tension ; unbonded tendon ; finite element analysis |
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Abstract |
Precast concrete (PC) beam-column connections using unbonded tendons can improve the seismic performance via self-centering effect of PC structures. In this study, PC beam-column specimens were manufactured and tested under reversed cyclic loading, in which the test variable was the magnitude of prestress. The test results showed that, compared to the RC specimen, pinching behavior was hardly observed in the PC specimens with unbonded tendons, and all acceptance criteria for the seismic performance of connections suggested by the ACI 374 report were satisfied except for the strength degradation due to concrete crushing failure at ends of beams. In addition, finite element analysis was conducted using two modeling methods, and it was found that the modeling method using beam-column elements for concrete and truss elements for tendons was appropriate for PC specimens with unbonded tendons.
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