Review of Studying on Fatigue Damage of Concrete Bridge

Abstract

Fatigue is the decay process of the structure stress performance under the action of repeated load. The fatigue essence is the material fatigue damage accumulation process along with the increase in the number of fatigue loading. Because of the structural fatigue damage caused by the great dangers, the fatigue damage problem has been studied by many researchers at home and abroad. In this paper, it systematically reviews the research status of fatigue damage of concrete bridges on the basis of previous studies and the problems for further research are discussed. From the bridge component materials perspective, the paper analyses the status and the development direction of the dynamic constitutive models. At the same time, the paper summarizes the fatigue cumulative damage theory and analyses the advantages and disadvantages of the various theories. The main contents of this paper include: the research history and status of fatigue damage of concrete bridges, the damage variable selection, the fatigue cumulative damage theory, the problems for further research on the fatigue damage of concrete bridge.