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

Abstract

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 in early ages, chemically prestressed members have large tension stiffening effect, and in flexural members, the stiffness of members near cracking and the behavior of concrete at the tensile end are different from those of normal concrete. The effects of restraint in three directions are observed in flexural behaviors, and the effects are remarkable especially when section size is large. Effects of peculiar characteristics of expansive concrete on the decrease of crack width are discussed.