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Title |
An Experimental Verification of the Moment Redistribution in Continuous Reinforced Concrete Members Depending on Bond Condition of Reinforcement
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Authors |
윤형재 ; 이승배 ; 김상식 ; 김강수 ; 장수연 |
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Keywords |
연속보 ; 모멘트재분배 ; 인장증강 효과 ; 최대 균열폭 ; 균열 간격 continuous beam ; moment redistribution ; tension stiffening effect ; maximum crack width ; crack spacing |
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Abstract |
The moment redistribution in continuous reinforced concrete beams is very feasible phenomenon, by which the efficiency and the economy in designing reinforced concrete members can be enhanced. However, to understand the structural behavior by moment redistribution phenomenon, it is desirable to verify its mechanism experimentally considering tension stiffening effect, the relationship of moment redistribution and beam deflection, crack pattern, and effective stiffness. Six reinforced concrete continuous beam specimens were fabricated, and each specimen had a dimension of 250 mm × 350 mm and 7,000 mm long. The location of de-bonding was taken as the primary test parameter to investigate tension stiffening effect. The moment redistribution ratio of the specimens was different depending on the position of de-bonding, and in particular no moment redistribution was observed when de-bonding exist at both ends, the maximum negative moment region and the maximum positive moment region.
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