Deformation controlled uniaxial tensile tests on dog-bone shaped prisms as well as on notched prisms were carried out to determine the fatigue behaviour of concrete. The test results show a significant in- crease of the uniaxial tensile strength, the Young's…
Deformation controlled uniaxial tensile tests on dog-bone shaped prisms as well as on notched prisms were carried out to determine the fatigue behaviour of concrete. The test results show a significant in- crease of the uniaxial tensile strength, the Young's Modulus and the elongation at failure with increasing the strain rate. The net tensile strength, the fracture energy, the characteristic length as well as the deformation at the peak stress decrease for an increasing number of load cycles. Further, the envelope curves of the stress- deformation relation obtained from the high-cycle fatigue tests differ significantly from the corresponding curve from the tests with a monotonic loading. On the basis of the experimental results, a new rheological sta- tistical model considering in particular the number of load cycles, time effects and the heterogeneity of con- crete was developed.