최근에는 건설 시장에서는 숙련노동자의 부족, 작업환경 개선, 시공 안정성 확보 그리고 구조물의 내진성능 확보 등을 위하여 PC 구조물의 선호도가 증가하고 있지만 PC 제품을 벽체 구조에 적용하기 위해서는 유효두께의 확대 기술, PC 패널의 강결 접합 기술 그리고 시공방법의 개발이 요구되고 있으므로 본 연구에서는.JPC 더블월 공법을 개발하여 PC 벽체의 단면 효율성을 개선하였으며, PC 부재로 단일 구조물을 형성하여 일체 구조물로 거동할 수 있도록 시공하기 위한 JPC 공법을 제시하였다.

Prestressed concrete (PSC) members are readly available in civil engineering applications due to the convenience of construction and easy of quality control in the manufacturing process of the member. Especially, half-depth precast concrete composite slab, which is one of the PSC flexural members is developed recently using the long-line method. The half-depth precast concrete composite slabs are composed of the precast concrete and the in-situ concrete placed at the site. In this paper, we present the results of experimental investigations pertaining to the pretensioning efficiency and the flexural behavior of half-depth precast concrete composite slab which is made of precast PSC manufactured by the long-line method. In the long-line method, the pretensioned precast member is manufactured simultaneously, by tensioning tendons at once. In addition, we suggest the equation that can estimate the flexural strength of half-depth precast concrete composite slab reasonably by considering the effects of rebar embedded in the precast PSC flexural member.