CHARACTERISTICS OF CHEMICALLY PRESTRESSED MEMBERS IN FLEXURE AND EFFECTS OF RESTRAINT IN THREE DIRECTIONS

In this paper, the characteristics of chemically prestressed members in flexure and the effects of restraint in three directions are experimentally investigated. When sufficiently cured at an early age, chemically prestressed members exhibit a large tension stiffening effect and, in the case of flexural members, stiffness near cracking and concrete behavior at the tensile end differ from those of normal concrete. The effects of restraint in three directions are observed in flexural behavior, and found to be notable especially when the section is large. The unusual effects of expansive concrete characteristics on the decrease of crack width are discussed.