FATIGUE OF CONCRETE UNDER UNIAXIAL COMPRESSION CYCLIC LOADING

This paper explores the strain response and damage behavior of concret e under uniaxial compression cyclic loading. Through present experimen tal investigation on irreversible str aim accummulation, strain range variation and the analysis of fatigue modulus of concrete with microcr acks, the fatigue failure process has been found to be related to the strain response behavior: It has also been found that irreversible str ain accumulation, strain range variation, and fatigue modules degradat ion of concrete under fatigue loading are associated with and carl be used to describe fatigue damage evolution of concrete. On the basis of the experimental results and continuum damage mechanics, a fatigue mo del is proposed in this paper which can be used to account for the str ain response properties fatigue damage evolution and S-N relation of c oncrete under uniaxial compression cyclic loading.