PROPOSAL OF NEW TYPE COMPOSITE PC STRUCTURES USING UFC TRUSS AS THE WEB MEMBER

Abstract

Recently, composite prestressed concrete (PC) bridge girders, which web member is made by various materials, have been developed. In this study, new composite PC structural members using Ultra High Strength Fiber Reinforced Concrete (UFC) as a web truss member are examined. UFC has high compressive strength around 200MPa, high ductility, and high durability. Due to its predominant mechanical properties, UFC can be applied to the web member of composite PC bridge girders and the self-weight of girders can be significantly reduced. The aim of this research is to investigate the mechanical properties of composite PC members using UFC truss and to evaluate the effect of weight reduction. Then, composite PC beams are designed and experiments and FEM analyses are carried out. In addition, the extent of weight reduction of a web member is examined.