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Title |
Investigation of Stress Changes in Concrete and Strands according to Cutting Order of the Strands in Pre-tensioned Concrete Slab
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Authors |
문도영 ; 김장호 ; 김규선 ; 윤만근 ; 지광습 |
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Keywords |
프리텐션 ; 용접절단 ; 절단순서 ; 프리스트레스 긴장재 ; 긴장력 도입 pretension ; flame cut ; cutting order ; prestressing strand ; detensioning |
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Abstract |
This study focuses on the effect of the cutting order of prestressing strands on the strain change in the strands and on the state of stress of concrete, experimentally and numerically. In the experiment, strain of strands and of transversal reinforcement were measured for three different cutting orders during detensioning process by using flame-cutting procedure. The experimental results were compared with those obtained from the FE analysis. As a results of the experiment, it is confirmed that the cutting order of prestressing strands affected on the strain of strands as well as of transversal reinforcement. The FE analysis gave similar results to those obtained from the experiment. Therefore, the cutting order should be chosen appropriately to when the strands get detensioned.
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