STRUCTURAL PERFORMANCE OF REINFORCED CONCRETE COLUMN USING PRECAST SHELL FORM

Abstract

To save labor for form work and installation of reinforcement at construction site and to save wood resources, square shell concrete form (PCa-shell) was developed. The PCa-shell is made of high strength concrete (Fc=500 kgf/cm^2) and contains hoops and tie bars. A column is made by putting the PCa-shell on main bars and then molding core concrete in it. So main bars of the column do not touch directly with lateral reinforcements. In this paper, the shear-flexural structural experiments on cast-in-place reinforced concrete members using the PCa-shell (half-precast members) were described. It appeared that the structural performances of these half-precast members were not less than usual reinforced concrete members. And the equations of flexural, shear and bond-split ultimate strength of the half-precast members were proposed