In this investigation, the effect of compressive strength on the fatigue behavior of plain concrete was studied. The fatigue behavior of plain concrete in uniaxial compression is influenced by the compressive strength of the concrete. Cylindrical specimens(Ø100×200 mm) of concrete with compressive strength of 265 kg/㎠, 530 kg/㎠, 860 kg/㎠, and 1053 kg/㎠ were tested and analyzed on the fatigue strength. In addition to fatigue strength, the deformation characteristics of the concrete subjected to fatigue loading were investigated. The fatigue life was decreased for the higher-strength concrete. It was known from the investigation for deformation that the irrecoverable strain of normal strength concrete is greater than that of high strength concrete.
A model for S-N relationship considering the effect of compressive strength, was proposed. And this model included the effect of strength and the strain rate effect which was modified for the strength level.