상부 슬래브와 합성된 원심성형으로 제작된 초고강도 각형보의 실험연구
The Experimental Study of Full-scale Centrifugal Formed High Strength Concrete Prismatic Beam(CFPB) Composited with Deck Slab
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초록
실리카 흄과 같은 고가의 혼화재 투입 없이 원심성형 공정 활용으로 콘크리트의 수밀성 증대 통한 콘크리트 압축강도 100 MPa급 초고강도 프리스트레스 각형보를 개발하였다. 벽체에 가설된 초고강도 원심성형 각형보는 상부슬래브 콘크리트와 합성된 후에 공용하중을 받게되는데, 원심성형 보와 바닥판 사이에는 휨에 의해 수평전단응력이 발생되고 이는 스터드나 철근 등의 전단연결재를 통해서 보와 바닥판이 합성거동을 하게 된다. 본 연구에서는 공장에서 생산된 100 MPa급 원심성형 각형보 상부에 RC슬래브를 제작하여 합성시킨 실물모형 시험체에대한 휨재하시험을 수행하였으며, 합성단면은 설계 공칭휨강도를 넘어 안정적인 합성거동을 하면서 파괴되어 구조적인 신뢰성을 입증하였다.
Abstract
An ultra-high strength prestressed prismatic beam of 100 MPa in compressive strength was developed by increasing the watertightnessof concrete by utilizing centrifugal molding processes without adding expensive admixtures such as silica fume. The ultra-high strength centrifugalshaped square beam installed on the wall is composited with the upper slab concrete and then subjected to a service load. Horizontal shear stress isgenerated by bending between the centrifugal molding beam and the floor plate, which causes the beam and floor plate to perform composite behaviorthrough shear connections such as studs and rebars. In this study, a flexural load test was performed on a mock-up specimen that was synthesized byfabricating an RC slab on top of a 100 MPa-class centrifugal shaped beam produced at the factory. proven reliability.
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