FATIGUE OF CONCRETE UNDER UNIAXIAL COMPRESSION CYCLIC LOADING

This paper explores the strain response and damage behavior of concrete under uniaxial compression cyclic loading. Through present experimental investigation on irreversible strain accumulation, strain range variation, and the analysis of fatigue modulus of concrete with microcracks, the fatigue failure process has been found to be related to the strain response behavior. It has also been found that irreversible strain accumulation, strain range variation, fatigue modules degradation of concrete under fatigue loading are associated with and can be used to describe fatigue damage evolution of concrete. On the basis of the experimental results and continuum damage mechanics, a fatigue model is proposed in this paper, which can be used to account for the strain response properties, fatigue damage evolution, and S-N relation of concrete under uniaxial compression cyclic loading.