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Title |
Evaluation on Flexural Behavior of Hybrid Beams with Rigid Joint Connecting Steel and Precast Concrete Elements
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Authors |
서은아(Eun-A Seo) ; 양근혁(Keun-Hyeok Yang) ; 홍승현(Seung-Hyun Hong) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2016.28.1.013 |
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Keywords |
하이브리드 보 ; 강접합 ; 연성 ; 붕괴기구 hybrid beam ; rigid connection ; ductility ; collapse mechanism |
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Abstract |
A hybrid precast concrete beam system with a simple rigid connection was proposed to compensate the limitations and shortcomings of the conventional bolt connection associated with the H-beams embedded into concrete beams. Three beam specimens with fixed both ends were tested under one-point top cyclic loading to explore the effectiveness of the developed hybrid beam system in transferring externally applied flexure to a column. The main parameter considered was the length (Ls) of H-beam, which was selected to be 0.25LI, 0.5LI, and 1.0LI, where LI is the distance from the support to the point of inflection. All beam specimens showed a better displacement ductility ratio than the reinforced concrete beams with the same longitudinal reinforcement index, indicating that the cyclic load-deflection curve and ductility were insignificantly affected by Ls. The continuous strain distribution along the beam length and the prediction of the ultimate load based on the collapse mechanism ascertained the structural adequacy of the developed rigid connection.
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