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Title |
Flexural Behavior of Beams Reinforced with Longitudinal GFRP Bars in Exterior Beam-column Connection
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Authors |
이혜진(Hye-Jin Lee); 문주현(Ju-Hyun Mun); 양근혁(Keun-Hyeok Yang); 김시준( Si-Jun Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2019.31.3.211 |
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Keywords |
보-기둥 접합부; GFRP 보강근; 휨 거동; 휨 내력 및 연성; 정착길이 beam-column connection; GFRP bar; flexural behavior; moment capacity and ductility; anchorage length |
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Abstract |
The objective of this study is to examine the effect of the potential lack of anchorage length of glass fiber reinforced polymer (GFRP) bars used for a longitudinal bar on the flexural behavior of reinforced concrete beams. A total of 4 beam-column connection specimens were tested under the reversal cyclic loads at the free-end of the beam. The flexural behavior of beams with insufficiently anchored GFRP bars was governed by the pull-out failure of the GFRP bars at the beam-column connection. As a result, lower flexural strength and ductility were observed in the beams using GFRP bars than in the companion beams using the conventional mild bars. This trend was independent of the compressive strength of concrete and yield strength of conventional mild bars. Furthermore, the flexural strength of beams with insufficiently anchored GFRP bars tended to be lower than the predictions by design equations of ACI 440.1R-15.
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