INTERFACIAL DEBONDING INVESTIGATION OF STEEL FIBER REINFORCED CONCRETE UNDER CYCLIC LOADING

摘要

Based on the shear-lag model and a usual loading way, the interfacial fatigue properties of steel fiber reinforced concrete (SFRC) under tension-tension cyclic loading are investigated. A usual composite model under cyclic loading is established. According to the Paris formula, the relationship between interfacial fatigue parameters and the number of cycles is obtained under the cyclic loading. Interfacial fatigue properties of this model and the growing of the interfacial fatigue crack are analyzed. And the Poisson's contraction is considered.