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논문 기본 정보

자료유형
학술저널
저자정보
김선희 (홍익대학교 토목공학과) 이승후 ([주]길교이엔씨) 박준석 (홍익대학교 과학기술연구소) 천진욱 ([주]길교이엔씨) 윤순종 (홍익대학교 토목공학과)
저널정보
한국복합신소재구조학회 복합신소재구조학회논문집 복합신소재구조학회 논문집 제6권 제2호
발행연도
2015.1
수록면
8 - 16 (9page)

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Prestressed concrete (PSC) is a method in which prestressed tendon is placed inside and/or outside the reinforced concrete member and the compressive force applied to the concrete in advance to enhance the engineering properties of concrete member which is weak under tension. In this paper we suggested the precast PSC girder assembled with segments of portable size and weight at the factory. The segments of precast PSC girder will be delivered and assembled as a unit of PSC girder at the site. Consequently, we suggested new-type of precast segmented PSC girder with different shapes of segment cross-section (i.e., I-shape, Box-shape). To mitigate the problems associated with the field splice between the segments of precast PSC girder anchor system is attached near the neutral axis of the girder and relatively uniform compression throughout the girder cross-section is applied. Prior to the experimental investigation, analytical investigation on the structural behavior of precast PSC girder was performed and the serviceability (deflection) and safety (strength) of the girder were confirmed. In addition, 4-point bending test on the girder was conducted to investigate the structural performance under bending. From the experimental investigation, it was found that the precast PSC girder spliced with 3 and 5 segments has sufficient in serviceability and safety conditions and it was also observed that the point where the segments spliced has no defects and the girder behaves as a unit.

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