Abstract
As a fundamental study on applicability of fiber reinforced plastic rods (FRP rods) to prestressing tendons, fatigue and creep tests were performed for FRP rods using glass, aramid and carbon fibers, and the effect of mean stress, stress amplitude and applied stress on the fatigue and creep properties were investigated. A number of fatigue cycles to be ruptured was decreased with an increase in mean stress and stress amplitude for GFRP rods, and could be estimated using these parameters. Failure time due to creep is decreased with an increase in applied stress. The ratio of applied stress to tensile strength is in proportion to sustained time in logarithm, and the threshold value of applied stress in a service life could be estimated by the relationship.
